1 Introduction

This paper is concerned with the time at which different syntactic operations occur in the verbal domain, particularly those that target its edge. The edge of vP is often proposed to host several kinds of Merge: external Merge of an argument, A-movement of an argument (Legate 2003; Sauerland 2003; Longenbaugh 2019), and successive cyclic Ā-movement of a wh-phrase (Chomsky 1986).

  1. (1)
    1. a.

      Sue read a book.

      figure a
    2. b.

      A book was read.

      figure b
    3. c.

      What did Sue read?

      figure c

In English object wh-questions like (1c), the external argument, rather than the moving wh-phrase, always controls subject agreement (What I am/*is). Somehow, the φ-probe on T must therefore be able to selectively target the external argument despite the fact that two phrases occupy Spec vP at the time T is merged: the external argument and the wh-object. Agreement with the external argument in (1c) cannot result from an inability of wh-phrases to control agreement. Passive contexts do permit moving wh-phrases to control subject agreement, as in (2).

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    Which books were read by Sue?

The comparison between (1c) and (2) leads us to the following general question. In cases where the edge of vP is occupied by two elements, one of which has wh-moved there, which one is visible to higher attractors/probes such as those responsible for subject agreement? Are there any contexts in which a wh-phrase blocks another argument from acting as the surface subject of the clause? (Here and throughout, I use the term “subject” to refer to the element that controls subject agreement and surfaces in subject position, regardless of thematic role.)

One context that fits this description has been called the “double object movement asymmetry” by Holmberg et al. (2019), who observe the effect in a variety of languages such as Norwegian, North West British English, Zulu, Lubukusu, Xhosa (Visser 1986), Swati (Woolford 1995), Haya (Duranti and Byarushengo 1977), Fuliiru (Van Otterloo 2011), Sotho (Morolong and Hyman 1977), and Tswana (Creissels 2002). In (3), we see that Norwegian normally permits either a direct object (DO) or an indirect object (IO) of a double object construction to be the subject of a passive clause. However, if the IO wh-moves, the DO is blocked from being the subject of the passive (4a). IO wh-questions built from passives are only grammatical if the IO is the surface subject (4b). (Here and throughout, I use the Leipzig Glossing Rules, except where indicated in Table 1.)

Table 1 Abbreviations and glossing conventions not otherwise covered by the Leipzig Glossing Rules
  1. (3)

    Norwegian symmetrical A-movement (Haddican and Holmberg 2015: 146, Ex. (2))

    figure d
  1. (4)

    “Double object movement asymmetry” (DOMA): the DO cannot be the subject of a passive in which the IO has wh-moved (subjects in bold; Holmberg et al. 2019: 680, Exs. (5d), (5a))

    figure e

The reverse pattern is not observed: IOs are allowed to be the subject of the passive, whether or not the DO has wh-moved (5).

  1. (5)

    Holmberg et al. (2019: 680, Exs. (5b), (5c))

    figure f

I propose that the restriction in (4a) comes about because of the timing of IO wh-movement relative to DO A-movement in a passive. If the IO wh-moves to Spec vP first, as schematized in (6), it checks not only the feature specified for wh-elements but that which licenses A-movement as well, thus blocking the DO from raising to that position. The result is therefore an IO passive. I will argue that the structure of ditransitives and an economy condition on the order of operations conspire to enforce the order of operations in (6), which explains the restriction in (4a).

  1. (6)
    figure g

This approach to the DOMA is motivated by its distribution across languages. All of the languages discussed by Holmberg et al. (2019) as exhibiting the DOMA have a common property: both the DO and IO are viable subjects of passives. However, not every language exhibits the DOMA. Greek, for example, permits DOs to be passive subjects in IO wh-questions, unlike Norwegian.

  1. (7)

    Greek doesn’t restrict IO wh-movement in passives

    figure h

A difference between Greek and Norwegian is that Greek IOs are not permitted to be the subject in a passive clause—Greek only has DO passives.Footnote 1 Languages that pattern like Greek both with respect to IO passives and the DOMA include German, Spanish, Tamil, and Turkish, and are discussed in Sect. 4.2.

  1. (8)

    Greek asymmetric passives

    figure i

This difference across languages is expected on the present approach: wh-phrases can only block another argument from being the subject of the clause if they themselves are suitable subjects. An expression that normally can’t be the subject of a clause cannot suddenly become one by being generated as a wh-phrase. Thus, only wh-IOs in languages with IO passives should be able to bleed a DO passive, as is observed in DOMA-exhibiting languages.

An outline of the paper is as follows.

Section 2 discusses Holmberg et al. (2019), who propose that the DOMA comes about because of universal constraints on wh-movement. I show that their approach undergenerates by predicting the DOMA in languages like Norwegian but failing to account for its absence in languages like Greek, thus motivating the need for the present approach.

Section 3 outlines a theory about how different Merge operations are expected to interact in vP, and looks at the structures/derivations of both monotransitive and ditransitive clauses through this lens. An important consequence of this section is that it motivates a smuggling derivation for passives of double object constructions (Collins 2005: shown in (9)). On this approach, VP must move to Spec vP in order to license a DO passive—if VP stayed in situ, the IO would c-command the DO and block the DO from raising, due to Relativized Minimality (Rizzi 1990).

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    Smuggling: VP raises to Spec vP, bringing the DO to a position not c-commanded by the IO

    figure j

Section 4 shows how the logic of feature checking established in Sect. 3, in the context of passives of double object constructions in languages like Norwegian but not Greek, predicts the DOMA and its distribution across languages. An economy principle like that proposed by van Urk and Richards (2015) (but revised; shown in (10)) is proposed to constrain the order of operations and derive the DOMA. This economy condition balances competing desires to check as many features as early as possible, while also using every element in the numeration. Specifically, it predicts that IO wh-movement must precede VP movement to Spec vP, and thus must precede the time at which the DO may be considered for A-movement.

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    Weak Economy

    At every step in a derivation, if two operations A and B are possible, and A checks more features than B, the grammar prefers A, unless doing B would check a subset of the features checked by A. In the latter case, the grammar optionally allows A or B.

Section 5 concludes.

2 Holmberg et al. (2019)

I have suggested that we should view the puzzle of the DOMA as evidence for the possibility that wh-phrases may bleed subjecthood of another argument, by moving through the position that introduces external arguments at a particular time in the derivation. This possibility is motivated by the generalization that only languages whose IOs can be passive subjects exhibit the DOMA (this will be shown in Sects. 4.1 and 4.2). However, there is an alternative way of viewing the puzzle, taken up by Holmberg et al. (2019), which treats the DOMA as evidence for constraints on wh-movement from certain contexts. I will detail their analysis now and show why the present approach is needed.

Holmberg et al. (2019) assume firstly that passivization precedes wh-movement. With this assumption, the ungrammaticality of (11a) is interpreted as evidence for a restriction on wh-moving the IO from a clause in which the DO has already raised to subject position. To explain this restriction, they propose a modified theory of phase impenetrability combined with a theory of contextually determined phasehood. Together, these assumptions treat the observed restriction in (11a) as evidence for a problem with the derivation in (11b).

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    1. a.

      *DP\(_{{\mbox{\scriptsize{IO,wh}}}}\) DP\(_{\mbox{\scriptsize{DO}}}\) verb-pass.

    2. b.

      Holmberg et al. (2019): can’t wh-move an IO past a passivized DO

      figure k

The ingredients of their theory are in (12) and (13). First they adopt the structures in (12) as the two kinds of ditransitive clauses available to languages. Second, they assume a stronger version of the Weak PIC, in which only the highest specifier of a phase head is accessible to wh-movement. Lastly, they assume that different heads may be phases in active versus passive contexts; the highest argument introducer assumes phase status in each case. As a result, v is proposed to be a phase head in active clauses, because it introduces the transitive subject, while Appl/V is proposed to be a phase head in passive clauses, depending on the ditransitive construction under consideration.Footnote 2

  1. (12)

    The two active ditransitive structures; phase head is v (in bold)

    1. a.

      Double object construction (e.g. Sue gave the cat a treat)

      figure l
    2. b.

      Prepositional dative construction (e.g. Sue gave a treat to the cat)

      figure m
  1. (13)
    figure n
  1. (14)

    The two passive ditransitive structures; phase head is Appl/V (in bold)

    1. a.

      Double object construction

      figure o
    2. b.

      Prepositional dative construction

      figure p

Finally, Holmberg et al. propose that DO passives in the double object construction are derived by raising the DO past the IO to the edge of ApplP (this is shown in (15)). A DO passive in a double object construction thus makes the recipient an inner specifier of the ApplP phase, which is inaccessible to wh-movement. The proposed restriction on IO wh-movement from a DO passive is analogous to Coon et al.’s (2014) proposed restriction on subject wh-movement in Mayan transitive clauses, following Aldridge’s (2004) approach to related facts in Austronesian. Importantly, Holmberg et al. propose that an Antilocality constraint keeps the recipient stuck as the inner specifier: it cannot raise past the theme to create a new, outer specifier of ApplP. This Antilocality constraint follows naturally if we assume in general that once some element has merged with a (projection of a) head, it cannot remerge with a projection of the same head (cf. Abels’ 2003 Comp-to-Spec Antilocality).

  1. (15)

    DO passive of a double object construction: blocks wh-movement of the recipient

    figure q

Holmberg et al.’s approach faces two main empirical challenges. First, their analysis predicts that every language with DO passives of double object constructions should exhibit the DOMA. If (15) represents the only way to form a DO passive of a double object construction, wh-movement of an IO in that context should be universally banned. However, Sundaresan (2020) shows that this prediction is not borne out in German and Tamil. Furthermore, Sect. 4.2 discusses additional counterexamples from Greek, Turkish, and Spanish, all of which have DO passives of double object structures, but lack the wh-movement restriction on IOs in those contexts.

The second empirical challenge pertains to the behavior of wh-movement from prepositional dative constructions. In (16), we can see that making the IO a prepositional phrase obviates the DOMA, showing that passives of prepositional dative constructions do not exhibit the trapping effect proposed for double object constructions.

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    PP IOs can wh-move in the passive

    figure r

In the passive of a prepositional dative, Holmberg et al.’s theory requires V to be the phase head, given that it introduces the theme and no higher head introduces any arguments. However, if this is true, the prepositional phrase must move to the edge of VP in order to wh-move. Doing so, however, would violate Comp-to-Spec Antilocality: no feature can license movement from the complement of some head to the edge of that same head (Abels 2003). Thus, DO passives should block PP IO wh-movement as well, contrary to fact.

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    Pied-piping faces an Antilocality problem

    figure s

In sum, Holmberg et al.’s theory predicts that every language’s DO passives (regardless of which ditransitive structure is used) should block recipient wh-movement. However, we find that only some languages exhibit the DOMA, and only in the double object construction, not the prepositional dative construction. While it may be possible to reconcile these facts with Holmberg et al.’s theory, for instance by positing additional covert structure in certain contexts, or accepting parametric variation within phase theory, I propose that these facts are better explained by an alternative approach. The proposed alternative approach focuses on morphosyntactic properties of IOs in different languages/contexts, rather than the edge properties of different clause types.

If we treat the DOMA as a blocking effect, as I propose that we do (wh-IOs block DOs from becoming the subject), both the distribution of the DOMA across languages and the behavior of wh-movement in prepositional datives are explained straightforwardly—only IOs that look like DPs and can act like subjects in other contexts should ever block a DO passive. Thus, we expect to see the DOMA in languages and constructions where the IO is a plausible subject, but not otherwise. The languages of Sect. 4.2 do not have IO passives and thus do not exhibit the DOMA. Prepositional phrases don’t control subject agreement, so prepositional dative constructions also don’t exhibit the DOMA.

The strength of the present approach is therefore that it capitalizes on the properties of languages we can see. Whether a language has IO passives is easy to diagnose. Whether a moving phrase has overt case morphology/prepositions attached to it is transparently observable. The theory that I outline in the coming sections predicts that a wh-moving IO that looks like a DP should become the subject if there is no transitive subject, if the language typically permits it to become a subject in the first place.

A child trying to figure out whether their language has the DOMA therefore only needs to know two facts about their language: (1) whether it has IO passives and (2) what DPs look like, in order to generalize to wh-movement in passives. In what follows, I present a theory of the timing of passivization and wh-movement in double object constructions that makes sense of the facts not covered by Holmberg et al.

3 Merge features and clause structure

To explain the DOMA, I propose we take up a different description of the phenomenon than Holmberg et al. (2019) do. They suggest that the DOMA is a restriction on wh-movement of the IO whenever the DO is the passive subject. By contrast, I suggest that the DOMA is a restriction on DO raising whenever the IO is a wh-phrase.

I argue that such a restriction falls out of properties of feature checking in the verbal domain, when we take into account the features needed for clause building, A-movement, and Ā-movement to the edge of vP. To show this, I will first outline some previously motivated assumptions about clause construction from a feature-driven perspective, and show how they can be leveraged to predict which argument becomes the surface subject in different contexts. Then I will propose a modified version of derivational economy, which, when applied to this system, predicts the DOMA.

3.1 The logic of merge features

This section provides an overview of my framework assumptions, which are drawn predominantly from Chomsky (1995) and its extensions found in Müller (2010); Preminger (2014); van Urk and Richards (2015); Longenbaugh (2019); Newman (2021).

The theory takes as a starting point the standard minimalist assumption that there is no formal difference between the operations involved in external Merge, A-movement, and Ā-movement: they are all instances of the same operation Merge. Assuming likewise with Chomsky (1995) that something must tell the derivation which Merge operations to employ, I will be representing Merge as a response to features on heads. The notation for the features driving Merge that I adopt is that of Müller (2010) and Longenbaugh (2019), shown in (18b). Replacing [X] with, for example, [D], [wh], [V], and so on yields Merge features that drive structure building of various kinds.

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    Framework assumptions/proposals

    figure t

The feature notation in (18b) is very generic—it doesn’t make reference to the kind of Merge required to check a given Merge feature. One might imagine that some Merge features have, in addition to a specification for the kind of element that may check them, a requirement to be checked by internal rather than external Merge (e.g. by requiring agreement with the merged element). However, whether or not some features place additional stipulations on the kind of Merge checking them is not crucial for the present proposal, so I will continue to use the notation in (18b) for any kind of Merge.Footnote 3

Having established what the features involved in Merge look like, we now turn to the conditions on their satisfaction. Suppose, for example, that a head has two features on it: [⋅F⋅] and [⋅G⋅]. Questions now arise pertaining to the order in which these features may be checked, the number of operations required to check them, and what happens if they never get checked. Following Longenbaugh (2019), I assume that the order of feature checking is only subject to economy considerations (19a): neither UG nor the lexicon impose any particular requirements for some feature to be checked before another (though the resulting structure is subject to interface considerations, which might filter out some derivations). Moreover, I follow Preminger (2014) and Longenbaugh (2019) in assuming that there is no penalty for unchecked features (19b). If there is a phrase present that can check a feature, checking must take place. However, if there is no such phrase, a feature may unproblematically fail to be checked; the interfaces will still attempt to assign an interpretation and pronunciation to the resulting structure.

Lastly, following Chomsky (1995), Pesetsky and Torrego (2001), van Urk and Richards (2015); among others, I assume that the features [⋅F⋅] and [⋅G⋅] may be checked by either one or two Merge operations, depending on the features of the merged element. An element that only bears a feature F may only check [⋅F⋅], and an element that only bears a feature G may only check [⋅G⋅]. As a result, if the numeration only supplies elements bearing either F or G but not both, checking the features [⋅F⋅] and [⋅G⋅] will require two separate instances of Merge. However, if an element is merged that bears both F and G, it may check [⋅F⋅] and [⋅G⋅] simultaneously. In fact, the condition in (19c) enforces multiple checking in such a case: merging an element bearing both F and G cannot have the result of selectively checking one Merge feature but not the other.

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    Conditions on the satisfaction of Merge features

    figure u
  2. (20)

    Merging a bearer of F or G (but not both) checks one feature on H. Merging a bearer of both F and G checks both features on H.

    figure v

It is important to note that Feature Maximality is not a global economy condition. It does not tell a head what operation to do first. Whatever operation a head happens to choose at a given time, Feature Maximality merely requires it to maximize the number of features checked by the operand. Thus, the presence of an element bearing both F and G in the numeration does not necessarily bleed the possibility of merging an element bearing only F or G in Spec HP. However, its presence does impose limits on what orders of operations permit multiple specifiers. If the element bearing both F and G merges in Spec HP before anything else, it checks all of the features and blocks subsequent Merge steps that would create new specifiers. If an element bearing only F or G merges first, the remaining feature will license the element bearing both as a second specifier.

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    Different orders of operations yield different numbers of specifiers

    1. a.

      Merging \(\alpha _{\mbox{\scriptsize{F+G}}}\) before \(\alpha _{\mbox{\scriptsize{F}}}\) → HP has one specifier

      figure w
    2. b.

      Merging \(\alpha _{\mbox{\scriptsize{F}}}\) before \(\alpha _{\mbox{\scriptsize{F+G}}}\) → HP has two specifiers

      figure x

Until now, the illustration of these framework assumptions has made no mention of what kind of Merge brings about the specifiers in (21). The derivations in (21) are assumed to be available regardless of whether \(\alpha _{\mbox{\scriptsize{F+G}}}\) and \(\alpha _{\mbox{\scriptsize{F}}}\) are externally or internally merged in those positions. However, if Richards (1997) is right, internal Merge is subject to an economy condition that doesn’t apply to external Merge: Shortest Move. Shortest Move requires the landing site for movement to minimize the number of dominating nodes between it and its base position. In contexts with multiple specifiers, later moved specifiers must successively tuck in under previously merged specifiers, in order to create the closest possible Spec HP position to the base position.

Shortest Move therefore makes it so that the choice between internal and external Merge has consequences for the order of specifiers even if it doesn’t affect the number of specifiers.Footnote 4 In a situation in which both \(\alpha _{\mbox{\scriptsize{F+G}}}\) and \(\alpha _{\mbox{\scriptsize{F}}}\) internally merge in Spec HP, adopting Richards’ (1997) Shortest Move predicts \(\alpha _{\mbox{\scriptsize{F+G}}}\) to tuck in under \(\alpha _{\mbox{\scriptsize{F}}}\), resulting in a different order of specifiers, shown in (22). I will henceforth assume that movement tucks in, as in (22).

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    Movement of \(\alpha _{\mbox{\scriptsize{F+G}}}\) that satisfies Shortest Move (Richards 1997)

    figure y
  1. (23)

    Movement of \(\alpha _{\mbox{\scriptsize{F+G}}}\) that violates Shortest Move (Richards 1997)

    figure z

With these abstract properties of the framework in place, we are now in a position to consider what structures are predicted given actual functional projections and their selectional features.

3.1.1 A note on locality and antilocality

Any theory that uses the same features to license both internal and external Merge raises questions about how to formulate locality conditions on movement. I take up the standard assumption that feature checking cannot involve just any constituent with the right features—the goal must also be in a domain that is local to the head controlling Merge, and it must not be c-commanded by any other potential goal for movement (Relativized Minimality).

I can imagine either of two views that capture Relativized Minimality effects in the present system. On one view, Merge features are universally endowed with a “probe,” which may search either the numeration/workspace or already built structure for a goal. If searching already built structure, this probe must search minimally (Chomsky 2004) by stopping at the closest element with matching features that it finds. See Branan and Erlewine (2021) for an overview of some recent work on Minimal Search algorithms.

Alternatively, we might follow Longenbaugh (2019) in assuming that Merge features never have a “probe”—only agreement-inducing features probe—where a constraint like Shortest Attract (Richards 1997) rules out some instances of feature checking produced by movement. This representational constraint bans checking of features by an element that is c-commanded by a comparable goal. For concreteness, I will adopt this representational view, described in the proxy rule in (24), because other aspects of the current framework are consistent with proposals in Richards (1997) and Longenbaugh (2019), though I do not believe anything hinges on this choice.

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    Proxy locality principle In the configuration [... X\(_{[\cdot \mbox{\scriptsize{Y}}\cdot ]}\) ... YP1 ... YP2], where YP1 c-commands YP2, YP2 cannot check [⋅Y⋅] on X.

As indicated in Sect. 1, in cases with multiple specifiers, we need only the outermost one to be accessible to higher movement and agreement operations; that is captured by both of these approaches to locality.

Lastly, this theory treats feature checking as a very local operation. In other words, a head with a feature [⋅F⋅] can only have its feature checked if a projection of that head merges with a bearer of F. It cannot check [⋅F⋅] by merging with something that itself does not bear F but that dominates something that bears F.Footnote 5

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    Successful checking via sisterhood

    figure aa
  1. (26)

    No checking with a sister’s daughter

    figure ab

This system of feature checking therefore contains an implicit Antilocality constraint, like the one formulated by Abels (2003), and taken up in Holmberg et al. (2019). The FP in (25) is not accessible for movement to Spec HP, having checked the feature that allows (re)merge with FP. The FP in (26), by contrast, is accessible for movement to Spec HP, since [⋅F⋅] was not checked by its sister.

Note that the relationship between checking and accessibility to movement is not sensitive to whether these checking operations form complements or specifiers. If H already had a complement, and were using features like [⋅F⋅] and [⋅G⋅] to form specifiers, the Antilocality principle would make analogous predictions. The FP in (27) cannot remerge as a new specifier of HP, having already checked the feature that licenses Merge with HP. The FP in (28), by contrast, is accessible for movement to Spec HP, since there is a feature present to license such a movement step.

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    If a projection of H merges with FP, [⋅F⋅] gets checked

    figure ac
  1. (28)

    If a projection of H merges with something else, [⋅F⋅] does not get checked

    figure ad

Of course, if movement from specifiers were banned for other reasons, such as the CED, then FP would not be allowed to move in (28). However, as smuggling derivations necessarily require movement from specifiers to be allowed in some cases, I will assume that movement of FP is permitted in (28), for reasons that will become clear when the smuggling derivations are introduced in Sect. 3.2.2. In fact, movement is required if permitted, according to Preminger (2014).

3.2 Feature checking with actual functional projections

3.2.1 Subjects and wh-movement

In this section, we consider the kinds of Merge operations required to build vPs and put these requirements in terms of Merge features to see how different Move and Merge operations are predicted to interact at the edge of vP. There are at least three general uses of Merge in building a vP: the kind that introduces arguments (e.g. the subject of the clause), the kind that builds the clause (e.g. v selects a VP complement), and the kind involved in successive cyclic wh-movement (Chomsky 1986).Footnote 6 According to the conjecture that all Merge is feature-driven, each of these uses of Merge must correspond to a feature on v, which predicts structures like (29) (i.e. the canonical clause structure for transitive and intransitive clauses). Note that the presence of [⋅wh⋅] on v doesn’t require every clause to be a wh-question, because features need only be checked in the presence of something that can check them. If no wh-expression is ever included in the numeration, the [⋅wh⋅] feature may simply fail to be checked with no consequences for grammaticality.

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    v must have at least three Merge features: [⋅D⋅], [⋅V⋅], [⋅wh⋅]

    figure ae

According to insights from Legate (2003), Sauerland (2003), and Longenbaugh (2019), the [⋅D⋅] feature on v has two potential functions: it may either introduce an external argument, as in a transitive/unergative clause, or it may license A-movement of an internal argument, as in a passive/unaccusative clause. In other words, the co-occurrence of [⋅D⋅] and [⋅wh⋅] on v predicts both A- and Ā-movement to be successive cyclic through vP.

Assuming that thematic roles are assigned by the head that interprets an argument (Kratzer 1996, Pylkkänen 2008, Ramchand 2008, Harley 2011; among others), both derivations in (30) are produced by the grammar, but the choice of v morpheme must be different depending on how its [⋅D⋅] feature is satisfied. An agentive v morpheme will be appropriate for specifiers formed by external Merge, which require a thematic role (30a). By contrast, a nonagentive v morpheme must be inserted when the specifier is formed by internal Merge, so the moving element does not receive two theta roles (30b). I assume that derivations that assign two theta roles to a single argument crash at the interfaces (the Theta criterion; Chomsky 1981).

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    v’s requirement for a DP specifier represented as [⋅D⋅] in both transitive and intransitive contexts

    1. a.

      [⋅D⋅] checked by external Merge

      figure af
    2. b.

      [⋅D⋅] checked by internal Merge

      figure ag

The co-occurrence of [⋅D⋅] and [⋅wh⋅] on v has implications for the time at which DPs that are also wh-phrases may Merge in Spec vP. Suppose a vP is being built that contains an object wh-phrase. If the object wh-moves before a transitive subject is externally merged, it will check both [⋅D⋅] and [⋅wh⋅], blocking an external argument from merging.

  1. (31)

    If a wh-object is internally merged first → intransitive clause; subject can’t Merge

    figure ah

As a result, a transitive object wh-question cannot have the derivation in (31). The derivation in (31) must instead correspond to a passive/unaccusative clause, since there is no external argument, and the internal argument cannot be assigned multiple theta roles. A transitive object wh-question must therefore correspond to a derivation in which v’s [⋅D⋅] feature is satisfied by external Merge before its [⋅wh⋅] feature is satisfied by object movement. The tree in (32) reflects this order of operations, where the wh-object tucks in under the subject. A transitive object is therefore correctly predicted never to block the external argument from controlling subject agreement—if it merged as the first (i.e. outer) specifier of v, it would block the external argument from being introduced altogether. The external argument must therefore be the outer specifier, making it the highest accessible argument to a higher φ-probe.

  1. (32)

    Only possible derivation for a transitive object wh-question: (1) check [⋅D⋅] by merging subject; (2) check [⋅wh⋅] by moving object

    figure ai
  1. (33)

    Some transitive and intransitive object wh-questions

    figure aj

It might come as a surprise that the derivation in (32) is even allowed by the syntax, given that the derivation in (31) is more economical—it checks the same features in fewer operations. A strong global economy condition, like that found in van Urk and Richards (2015) (shown in (34)), would therefore rule out transitive object questions.

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    Multitasking (van Urk and Richards 2015)

    At every step in a derivation, if two operations A and B are possible, and the features checked by A are a superset of those checked by B, the grammar prefers A.

Since transitive object wh-questions clearly exist, I propose to weaken van Urk and Richards’ economy condition to that in (10), repeated below, from Sect. 1. In this weaker form, economy can never enforce bleeding; it can only weakly pressure the derivation to check as many features as early as it can. This weakened form of economy will make crucial predictions in contexts where no bleeding is at stake, as in wh-movement in passives.Footnote 7

  1. (10)

    Weak Economy

    At every step in a derivation, if two operations A and B are possible, and A checks more features than B, the grammar prefers A, unless doing B would check a subset of the features checked by A. In the latter case, the grammar optionally allows A or B.

Replacing A with “internally merge a wh-DP in Spec vP” and B with “externally merge a DP in Spec vP,” derivations (31) and (32) demonstrate that A checks a superset of the features that B does ([⋅D⋅]+[⋅wh⋅] vs. just [⋅D⋅]). According to (34), (31) should therefore be the only possible derivation, which blocks transitivity. According to (10), however, either derivation should be possible; (10) only impacts the derivation if there is no superset relationship between the two options and one operation checks more features than the other.

Section 3.2.2 investigates the structure of ditransitive clauses, in preparation for the explanation of how A-movement and Ā-movement in double object constructions interact, found in Sect. 4.

3.2.2 Ditransitives, passives, and smuggling

The previous section considered monotransitive and intransitive clauses, in which v selects VP as a complement. In this section we review some structures commonly proposed for ditransitive clauses and see what features are required to describe them. There are two commonly discussed ditransitive constructions, the double object construction and the prepositional dative construction, shown in (35) for English and (36) for Norwegian.

  1. (35)

    English ditransitives

    figure ak
  2. (36)

    Norwegian ditransitives (Anderssen et al. 2014: 25, Ex. (2))

    figure al

Double object constructions often lead authors to amend the vP structure proposed for transitive clauses by adding an additional functional projection that introduces a second internal argument (e.g. the VP shells of Larson 1988, the prepositional shells of Harley 1995, Pesetsky 1995, or the applicative projections of Marantz 1993, McGinnis 2001a, Pylkkänen 2008; among others). Holmberg et al. (2019) propose that the DOMA-exhibiting languages’ double object constructions have the high applicative structure proposed by Pylkkänen (2008), shown in (37). The structure in (37) does not make VP v’s complement as in (29). Instead v selects for ApplP, which selects for VP. By contrast, prepositional dative constructions are assumed to have the structure in (38), which preserves VP’s status as v’s complement, and in which both internal arguments are dominated by VP.

  1. (37)

    Pylkkänen’s (2008) high applicative structure for double object constructions

    figure am
  2. (38)

    Prepositional dative constructions

    figure an

Prepositional dative constructions require no amendment to the list of features we assigned to v. Assuming, however, that Appl is not of category V (i.e. it is a derivational morpheme rather than a lexical verb), in order for the syntax to generate the double object structure in (37), we must update the list of features on v to include an extra feature, which licenses ApplP complementation (e.g. [⋅Appl⋅]).Footnote 8

This amendment to the list of features on v is the direct result of two assumptions about Merge and the functional hierarchy: (1) that every instance of Merge must correspond to some licensing feature and (2) that the functional hierarchy is a reflection of the distribution of category-selecting Merge features on heads. The functional hierarchy is specified such that v selects for VP in the absence of ApplP but can alternatively select for ApplP, which selects for VP (and no other order arises when those three elements are present). To account for this pattern, v must have features [⋅V⋅] and [⋅Appl⋅] and Appl must have [⋅V⋅]. In the absence of ApplP, v merges directly with VP and [⋅Appl⋅] goes unchecked. In the presence of ApplP, v selects for ApplP, which leaves [⋅V⋅] unchecked.

In sum, the proposed structures for prepositional datives and double object constructions have two notable syntactic differences: (1) the IO asymmetrically c-commands the DO in (37) while the reverse is true in (38), and (2) the feature that normally licenses VP complementation goes unchecked in (37) but not in (38) (updated with Merge features in (39) and (40) respectively).

The asymmetric c-command relationship between the DOs and IOs in each case would lead us to expect the following profile for passives of ditransitives: only the IO can be the passive subject in a double object construction, and only the DO can be the passive subject in a prepositional dative construction. Attempting to raise the DO in (39) or the IO in (40) should violate locality conditions on movement.

  1. (39)

    In a passive of a double object construction, the IO should always raise

    figure ao
  2. (40)

    In a passive of a prepositional dative construction, the DO should always raise

    figure ap
  3. (41)

    Predicted passives for each structure

    figure aq

While passives of prepositional dative constructions in Norwegian follow this prediction (42), passives of double object constructions do not. In (3), repeated below, we see that either object of a double object construction may raise to subject position in a passive, despite the fact that the proposed structure in (37) predicts (3a) to violate locality conditions.

  1. (42)

    Norwegian asymmetric passives of prepositional datives (Johannes Norheim, p.c.)

    figure ar
  2. (3)

    Norwegian symmetric passives of double object constructions (Haddican and Holmberg 2015: 146, Ex. (2))

    figure as

To resolve this issue, we could follow Holmberg et al. (2019) and take up a proposal from McGinnis (2001a,b) to allow the DO to leapfrog past the IO to Spec ApplP. We could do this by adding features to Appl, which would attract the DO to its edge and assign case to the IO, as they suggest. However, I propose that this solution is unnecessary—the features on v already provide the machinery we need to allow the DO to raise, without leapfrogging.

I propose that the second difference between prepositional datives and double objects allows the DO to raise: the unchecked [⋅V⋅] feature on v triggers movement of VP to Spec vP in a double object construction (shown in (43)), which breaks the c-command relationship between the two objects, licensing A-movement of the DO without violating any locality conditions (shown in (44)).Footnote 9 Importantly, VP may move past the IO in (43) without violating any locality conditions because it is attracted by a different feature: VP is the closest V-bearing element to v, and DP\(_{\mbox{\scriptsize{IO}}}\) is the closest D-bearing element to v. This is essentially a smuggling approach to double object constructions, similar in spirit to the analysis proposed by Collins (2005) for passives in general. Symmetric passives are therefore entailed by the double object structure in (37), due to the unchecked [⋅V⋅] feature.Footnote 10

  1. (43)

    VP movement licensed by [⋅V⋅] smuggles the DO past the IO

    figure at
  2. (44)

    Neither argument c-commands the other, so either may move to Spec vP without violating locality conditions

    figure au

The present analysis shares with Collins (2005) the proposal that the DO can be moved past another argument if its dominating phrase moves first. However, the implementation of this proposal differs from Collins (2005) in several respects. In particular, an unchecked [⋅V⋅] feature on v is required to license smuggling on the present approach, which occurs in double object constructions but not in monotransitive clauses. Collins proposes that smuggling always occurs in passives, even in monotransitives, contra the present account. I also do not adopt Collins’ proposal to treat the implicit agent in a passive as a DP in Spec vP, or else it would block raising of an internal argument. I therefore assume that the implicit agent in passives is not represented in the syntax (Bruening 2013, Legate 2014, Schäfer and Pitteroff 2017; among others).Footnote 11

In sum, each ditransitive structure in languages like Norwegian allows a different set of elements to become the subject of a passive. The prepositional dative construction only permits the DO to do so, because it asymmetrically c-commands the IO, and no features independently proposed on v license smuggling of the IO past the DO.Footnote 12 The double object construction permits either object to raise to subject position in a passive, because the double object construction leaves [⋅V⋅] unchecked, which licenses smuggling of the DO past the IO.Footnote 13

When wh-movement is added to the mix, observe that only double object constructions reject the combination IO wh-movement + DO passive; prepositional dative constructions permit the DO to be the subject of a passive in (45). Thus, empirically, we find that only contexts in which the IO could in principle be the passive subject show the bleeding effect of the DOMA.

  1. (4)

    DOMA: the DO cannot be the subject of a passive in which the IO has wh-moved (subjects in bold; Holmberg et al. 2019: 680, Exs. (5d), (5a))

    figure av
  1. (45)

    Norwegian: passive + wh-movement in prepositional datives (Johannes Norheim, p.c.)

    figure aw

Section 4 will explain this effect by appealing to the following asymmetry between the DO and IO of a double object construction: IO movement in a passive can proceed straight from its base position, while DO movement is contingent on VP movement.

In sum, we have seen that the logic of feature checking, combined with the double object structure in (37), predicts that DOs should be smuggled past IOs in a double object construction. As such, both internal arguments of a double object construction are available for A-movement in a passive, since neither c-commands the other. In Sect. 4, we see how the timing of VP movement relative to wh-movement predicts the DOMA.

Before moving on, I want to briefly address the implications of smuggling for verb position and pronunciation. A reviewer notes that in many of the languages under discussion, the verb surfaces in a position higher than vP, such as T or C. As such, verb movement to a higher position must be possible, despite the fact that VP has moved to a specifier position. According to Baker (1988), at least some kinds of head movement are not permitted to escape specifiers, which makes the coexistence of smuggling and V-to-T/C movement surprising.

That said, Harizanov and Gribanova (2019) argue that some kinds of head movement, most notably V-to-T/C movement in some languages, show properties of phrasal movement. For example, head movement in several Scandinavian languages (among others: e.g. Bulgarian) appears to violate the head movement constraint: there is evidence that the verb moves to C, but no evidence that it moves through lower aspect and tense heads along the way. Harizanov and Gribanova therefore conclude that what we call “head movement” is not a homogenous phenomenon. Some types of head movement are derived by genuine movement in the syntax to a specifier position, which can skip intermediate head positions, followed by a morphological process that fuses it to the nearest head complex (Matushansky 2006). Other types of head movement, by contrast, are derived in the postsyntax, by morphological processes that proceed in a “roll-up” fashion, where each head is sequentially affixed to the verbal complex, and no heads can be skipped. Whether Baker’s constraint applies to both kinds of head movement, versus just the latter kind, is an open question.

For the present analysis, smuggling demands that phrasal movement be allowed to escape a VP specifier. As such, we would expect head movement with phrasal properties to be able to escape a VP specifier as well. Harizanov and Gribanova (2019) discuss Norwegian as being one of the languages with head movement constraint–violating movement, in which case we expect smuggling to be able to feed head movement out of VP in Norwegian just as it feeds movement of a DO from VP.Footnote 14

4 Explaining the DOMA

Section 3 established a logic of feature checking that predicted a smuggling derivation for double object constructions—VP raises to Spec vP, which brings the DO to a position not c-commanded by the IO. The lack of c-command between internal arguments predicts symmetric passives, since either argument can A-move without violating locality conditions. In this section, we consider how the [⋅wh⋅] feature on v is expected to affect the possible derivations of passives of double object structures where different arguments are wh-phrases, and show that the DOMA is predicted as long as the order of operations is constrained by the economy principle in (10).

  1. (10)

    Weak Economy

    At every step in a derivation, if two operations A and B are possible, and A checks more features than B, the grammar prefers A, unless doing B would check a subset of the features checked by A. In the latter case, the grammar optionally allows A or B.

To see how the economy condition in (10) predicts the DOMA, we need to build a passive vP of a double object construction step by step, and see how the derivations are affected by making different arguments wh-phrases. Let’s begin by making the DO a wh-phrase. Starting with a v head that has features [⋅D⋅], [⋅wh⋅], [⋅V⋅], and [⋅Appl⋅], v must begin by merging ApplP as a complement. ApplP checks the [⋅Appl⋅] feature on v, which leaves [⋅D⋅], [⋅wh⋅], and [⋅V⋅] for licensing VP movement and movement of an argument to Spec vP.

  1. (46)

    Step 1: Merge(v,ApplP)

    figure ax

At this point in the derivation, there are two operations that might target the edge of vP without violating locality conditions: A-movement of the IO and VP movement (i.e. smuggling).Footnote 15 Since both operations check just one feature, Weak Economy does not decide between them, and so two derivational paths are possible from the starting point in (46).

If the IO raises first (47a), the remaining features license VP movement (which tucks in due to Shortest Move) and wh-movement of the DO (which also tucks in under DP\(_{\mbox{\scriptsize{IO}}}\)), shown in (47b).Footnote 16 The resulting structure is one in which the IO is the highest accessible argument to further A-movement/agreement. Moreover, nothing about this configuration is proposed to block wh-movement of the DO, and so the result is a DO question of an IO passive.

  1. (47)

    Option 1: check [⋅D⋅] with DP\(_{\mbox{\scriptsize{IO}}}\) before checking [⋅V⋅] with VP

    1. a.

      Step 2: move DP\(_{\mbox{\scriptsize{IO}}}\)

      figure ay
    2. b.

      Continuation of (47a): move VP (it tucks in), then move DP\(_{ \mbox{\scriptsize{DO,wh}}}\) (it tucks in)

      figure az

If VP moves first instead, two derivational options are available, both of which make the DO the highest accessible argument. After [⋅V⋅] is checked, only features [⋅D⋅] and [⋅wh⋅] remain. Since the two elements that can check these features stand in a subset relationship, Weak Economy does not decide whether the DO wh-moves first and checks both features or the IO raises before the DO wh-moves. Whether the IO moves first is irrelevant, however, because the IO must tuck in below VP if it moves, and thus below the DO. I have therefore left it in situ in (48b) to make the derivation clearer.

  1. (48)

    Option 2: check [⋅V⋅] with VP before checking [⋅D⋅]

    1. a.

      Step 2: move VP

      figure ba
    2. b.

      Continuation of (48a): move DP\(_{\mbox{\scriptsize{DO,wh}}}\)

      figure bb

In sum, a passive of a double object construction in which the DO is a wh-phrase is compatible with two possible outcomes. Either the IO raises before VP, and ends up as the outermost specifier of vP due to tucking in, or VP is moved first, which allows the DO wh-phrase to raise to become the highest accessible DP. Assuming that the highest DP in vP is the one that controls subject agreement/raises to subject position, the outcome in (47b) feeds an IO passive (pronounced as in (50)), while the outcome in (48b) feeds a DO passive (pronounced as in (51)).Footnote 17

  1. (49)

    T attracts/agrees with highest accessible DP

    1. a.

      Continuation of (47b): DP\(_{\mbox{\scriptsize{IO}}}\) is the subject of the clause

      figure bc
    2. b.

      Continuation of (48b): DP\(_{\mbox{\scriptsize{DO,wh}}}\) is the subject of the clause

      figure bd
  1. (50)

    Checking [⋅D⋅] before [⋅V⋅] → IO passive

    figure be
  2. (51)

    Checking [⋅V⋅] before [⋅D⋅] → DO passive

    figure bf

Repeating the exercise with a wh-moving indirect object yields a different result. In this case, early movement of the IO in Step 2 is enforced by Weak Economy. In Step 2, moving the wh-IO now checks both [⋅D⋅] and [⋅wh⋅], whereas moving VP would only check [⋅V⋅]. The IO therefore checks more features, and moving VP does not check a subset of those features, so only Step 2a is allowed by Weak Economy.

  1. (52)

    Step 1: Merge(v,ApplP)

    figure bg
  2. (53)

    Step 2: check both [⋅D⋅] and [⋅wh⋅] with DP\(_{{\mbox{\scriptsize{IO,wh}}}}\) versus check only [⋅V⋅] by merging a VP

    1. a.

      Option 1: move DP\(_{{\mbox{\scriptsize{IO,wh}}}}\) first (enforced)

      figure bh
    2. b.

      Option 2: move VP first (blocked)

      figure bi

Because the IO moves to Spec vP before VP is merged, the IO becomes the outermost specifier of vP—every subsequent specifier of vP tucks in under it, making the IO the highest accessible argument for subject agreement/A-movement. As a result, only (54), pronounced in (55), is derived.

  1. (54)

    Only derivation available when the IO is a wh-phrase

    figure bj
  1. (55)

    Checking [⋅D⋅] and [⋅wh⋅] before [⋅V⋅] → IO passive

    figure bk
  2. (56)

    Checking [⋅V⋅] before [⋅D⋅] not an option → no DO passive

    figure bl

This account of the DOMA rests on the following assumption about what makes an element a suitable subject: it must be accessible to the probe/attractor responsible for subject agreement/position. In (54), the DO cannot be the subject of the clause because it is c-commanded by the IO, which is accessible to agreement/A-movement. Attempting to pronounce the DO in subject position, as in (56), is therefore blocked.

This account therefore makes an important prediction: if the IO were not a DP, and therefore could not move to Spec vP, or if it were a DP that was inaccessible to a higher probe for some reason, the DO could end up being the closest accessible goal to a higher probe. In such a case, the DOMA should not arise—wh-IOs can’t block a DO passive if they can’t be passive subjects themselves. Greek is such a language: its IOs never control subject agreement, and it also does not exhibit the DOMA.

  1. (57)

    Greek doesn’t have IO passives or the DOMA restriction

    figure bm

On the present approach, Greek must therefore differ from Norwegian in either of two ways: (1) by never permitting IOs to check a [⋅D⋅] feature or (2) by making IOs inaccessible to subject agreement. These abstract differences follow naturally from an observable difference between Norwegian and Greek IOs. In Norwegian, IOs of double object constructions have no overt inherent case, while Greek IOs in the same context are marked with genitive. Assuming with Lamontagne and Travis (1987); Bittner and Hale (1996); Neeleman and Weerman (1999); Rezac (2008); Caha (2009); Pesetsky (2013); Levin (2015); among others that inherent case may be realized as a prepositional shell around a nominal, the difference between Norwegian and Greek can be reduced to the syntactic category of its IOs: Norwegian IOs are represented as DPs while Greek IOs are represented as PPs. This choice affects both the features that each argument can check and their accessibility to φ-agreement.Footnote 18

To briefly elaborate on my assumptions about case, I assume that some languages’ IOs have inherent case due to an idiosyncratic property of their applicative morphemes: some applicative morphemes l-select for a PP, or license inherent case on their arguments, while others do not. Arguments that do not receive inherent case get assigned structural case, which I assume is computed based on whichever argument raises to subject position in the language (either via licensing by T or via a dependent case mechanism).

Sections 4.1 and 4.2 examine some languages that do and do not exhibit the DOMA, and motivate the present analysis of them. Before moving on, however, I want to clarify why wh-IOs only block DOs from subject position, not transitive subjects. Norwegian, for example, permits IOs to wh-move in active transitive clauses, suggesting that IOs are capable of wh-moving without checking [⋅D⋅].

  1. (58)
    figure bn

The difference between externally merging a transitive subject and internally merging a DO is that external Merge need not be preceded by VP movement while internal Merge of a DO is contingent on VP movement. As a result, the stage at which a wh-IO is considered for wh-movement is a stage at which an alternative operation is available involving the transitive subject, namely external Merge of the subject. Externally merging a subject checks a proper subset of the features that would be checked by wh-moving the IO, and so Weak Economy does not decide between them: the transitive subject may merge first to avoid being bled.

  1. (59)

    Step 2: two options! Check [⋅D⋅] and [⋅wh⋅] with DP\(_{{\mbox{\scriptsize{IO,wh}}}}\) or check [⋅D⋅] with DP\(_{\mbox{\scriptsize{ext}}}\)

    1. a.

      Option 1: move DP\(_{\mbox{\scriptsize{IO}}}\) first

      figure bo
    2. b.

      Option 2: merge DP\(_{\mbox{\scriptsize{ext}}}\) first

      figure bp

When the rest of the clause is built, Option 1 makes the IO the only accessible argument for raising to subject. Furthermore, there is no external argument, meaning that this structure can only be realized as an IO passive (60a). Option 2 makes the external argument the highest accessible argument for raising to subject, resulting in a transitive clause (60b).

  1. (60)

    Options 1 and 2 realized in Norwegian

    figure bq

In sum, since Weak Economy never enforces bleeding derivations, which is why transitive object wh-questions are permitted more generally, there is always a derivation available in which the transitive subject is merged before the IO wh-moves. The same cannot be said for the DO, however, which must be smuggled by VP before it can A-move—VP movement cannot be bled by IO movement and is thus subject to Weak Economy. Sections 4.1 and 4.2 show that this account extends beyond Norwegian and Greek to several other languages with symmetric and asymmetric passives respectively.

4.1 Languages with symmetric passives

Holmberg et al. (2019) report that the DOMA is observed in the following languages: Norwegian, North West British English, Zulu, Lubukusu, Xhosa (Visser 1986), Swati (Woolford 1995), Haya (Duranti and Byarushengo 1977), Fuliiru (Van Otterloo 2011), Sotho (Morolong and Hyman 1977), and Tswana (Creissels 2002). All of these languages have in common that their double object constructions permit symmetric passivization: either the DO or IO may in principle be the subject of a passive. Note that Holmberg et al. report the DOMA in multiple Ā-movement contexts, not just wh-movement. Relativization also shows the DOMA, as seen in the Zulu relative clauses in (61).Footnote 19 This is unsurprising if all Ā-phenomena are controlled by an Ā-feature on heads like v and C.

  1. (61)

    Zulu: relativization + passive (Holmberg et al. 2019: 683, Exs. (14a), (15a); cf. Zeller 2012: Exs. (34b), (35b))

    figure br

Also important to note is that overt Ā-movement data exhibiting the DOMA are only available in some of these languages. Nonetheless, Holmberg et al. (2019) suggest that many of these languages have another situation in which the DOMA is visible, namely the distribution of object marking on the verb more generally. In the Zulu DOMA examples in (61), notice that there is a morpheme glossed om on the verb, which is proposed to be a kind of agreement that may cross-reference nonoblique objects (but not oblique ones; see Halpert 2012: 223–224 for discussion).

The status of this object marking is subject to some debate (see van der Wal 2015 for an overview). What is unique about it is that it never cross-references in situ or A-moved objects—passive subjects never control object agreement. Rather, the object agreement is partly discourse-driven in that it tracks arguments that either Ā-move or right-dislocate from their in situ positions within vP to a vP-external position (or drop altogether). This movement/agreement correlation is shown in (62), where we observe that the verb agrees with whichever object has right-dislocated (and may be dropped). If neither one moves, there is no agreement. Following Iorio (2014) and van der Wal (2015), I will assume that there is a φ-probe controlling this agreement on v, but that it is more selective than many φ-probes—it only targets arguments with certain information-structural properties.Footnote 20 Hence, in (61), the relativized argument is shown to control object agreement on the verb.

  1. (62)

    Zulu: flexible object agreement

    figure bs
  2. (63)

    A φ-probe on v agrees with arguments with certain discourse properties

    figure bt

If this analysis of object marking is correct, we would expect to see the DOMA restriction in any context where the recipient controls object marking, not only where it is the target of relativization or overt left dislocation—the theory predicts that if the IO is available for any additional operation at v, not just wh-movement, it is predicted to move early and give rise to DOMA-like effects, as illustrated in (64) and (65).

  1. (64)

    Step 1: Merge(v,ApplP)

    figure bu
  2. (65)

    Step 2: if the IO has the right discourse properties to value [], it can check/value both [⋅D⋅] and []; merging VP only checks [⋅V⋅] → Weak Economy enforces IO raising + agreement

    1. a.

      Option 1: move DP\(_{\mbox{\scriptsize{IO}}}\) first (enforced)

      figure bv
    2. b.

      Option 2: move VP first (blocked)

      figure bw

This is indeed what Holmberg et al. (2019) propose that we find in all of the Bantu languages in their sample, illustrated in (66) and (67) for Xhosa and Swati: recipient passives permit the DO to control object agreement, but theme passives do not permit the recipient to control object agreement. If the recipient is available for object agreement in (66/67b), it has to simultaneously value [] and check [⋅D⋅] before smuggling can take place, which blocks the theme passive. The glossing conventions in (66) and (67) reflect those adopted by the cited authors: the referent of object marking in (66) is shown by coindexation; the referent of object marking in (67) has been dropped, but the phonological forms of the agreement markers in both examples are transparent ((w)u when the controller of agreement is ‘banana’ and si when it is ‘friend’).

  1. (66)

    Xhosa (Visser 1986: 132, Ex. (16))

    figure bx
  2. (67)

    SiSwati (Guzman 1987: 314, Exs. (1f), (1e))

    figure by

We now turn to languages that lack IO passives, and thus predictably lack the DOMA: IOs in these languages can never block another argument from being the subject of the clause.

4.2 Languages with no IO passives

The source of the DOMA observed in Sect. 4.1 was proposed to be the fact that those languages move wh-IOs to Spec vP before DOs are accessible for movement. As a result, wh-IOs necessarily become the highest accessible argument to T, which blocks the DO from raising to subject position. If a language somehow prevents the IO from being a viable subject of a passive, the DOMA is predicted not to arise because the DO should then be the only accessible argument for promotion to subject position.

A review of some languages without IO passives confirms this prediction. Anagnostopoulou (2003) shows that Greek both lacks IO passives and lacks a restriction on DO passivization when an IO wh-moves. Sundaresan (2020) shows the same result for Tamil and German. The examples in (71) and (72) show that the same is true for Turkish and Spanish (the (a) examples show the DO passive as a baseline, the (b) examples show an ungrammatical IO passive, and the (c) examples show a grammatical DO passive with a wh-moving IO).Footnote 21

  1. (68)

    Greek

    figure ca
  1. (69)

    Tamil

    figure cb
  1. (70)

    German (Sundaresan 2020)

    figure cc
  1. (71)

    Turkish (Öztürk family, p.c.)

    figure cd
  2. (72)

    Spanish

    figure ce

These languages all have in common that their IOs have overt morphology associated with them, such as inherent case in the first four languages and something that looks like a preposition in Spanish. If we assume that inherent case is actually a prepositional shell around the IO in these cases, then case-marked IOs presumably cannot check the [⋅D⋅] feature on v or control φ-agreement on T. As a result, IOs in these languages cannot be subjects, and they cannot block other arguments from becoming subjects when they wh-move.

One might worry that the evidence in (68)–(72) is not enough to justify the present treatment of the DOMA, because I haven’t shown that these examples are actually double object constructions. If they can all be analyzed as prepositional dative constructions, then their lack of the DOMA might be attributable to the lack of the right structural context in which to observe it, rather than due to the morphosyntax of their IOs.Footnote 22

This objection is not justified, however, because structural diagnostics support treating these examples as double object constructions. Greek has a clear dative alternation, where binding evidence supports the treatment of genitive IOs such as those in (68) as the higher internal argument of a double object construction. The Greek dative alternation is shown in (73), and binding data supporting the treatment of (73b) as a double object construction are shown in (74) (see Anagnostopoulou 2003 for additional support of this treatment).

  1. (73)

    Greek dative alternation (Sabine Iatridou, p.c.)

    figure cf
  2. (74)

    Greek: Principle A in double object constructions (Sabine Iatridou, p.c.)

    figure cg

German and Turkish ditransitives are not typically considered to have a dative alternation, but binding evidence can still tell us the base-generated order of internal arguments. Early evidence from Grewendorf (1988) suggested that the German double object construction generates DOs in a high position compared to IOs, as in the prepositional dative construction. However, two recent works argue against this conclusion.

First, Hallman (2021) argues that German actually does have a productive dative alternation, but not all recipient-selecting verbs have it. For example, geben ‘to give’ and schenken ‘to gift’ only appear in the “double object construction,” while many other verbs, including the prefixed version zurück-geben ‘to give back’ have a prepositional variant as well.

  1. (75)

    German dative alternation (Hallman 2021: 149, Ex. (9))

    figure ch

Second, Twiner and Lee-Schoenfeld (2019) argue that controlling for additional factors such as case and agreement morphology on reflexives, and idiomatic readings of verbs like ‘show,’ reveals a different binding pattern than that originally introduced in Grewendorf (1988). They argue, based on examples like (76) (and also others testing scope reconstruction effects) that the German double object construction is actually a double object construction—the IO is base-generated higher than the DO. The fact that German doesn’t exhibit the DOMA is therefore not due to German lacking the double object construction. I argue instead that German lacks the DOMA because its IO cannot be the subject of the passive of a double object construction. Based on similar binding data, Özkan (2013) argues that Turkish has a high applicative double object construction, making it similarly relevant for investigating the DOMA.

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    Binding in German ditransitives: dat binds acc and not vice versa (Twiner and Lee-Schoenfeld 2019: 3, Ex. (3b), and subsequent prose)

    figure ci

Spanish ditransitives have no word order alternation, and their morphology looks like the prepositional dative construction. However, Demonte (1995) has shown that the presence or absence of clitic doubling in Spanish affects binding in ditransitives, which motivates the existence of a structural alternation in Spanish, despite there being no word order alternation. Importantly, the presence of a clitic in (72) does not prevent the IO from wh-moving in the context of a DO passive, showing that the Spanish double object construction does not exhibit the DOMA.

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    Spanish clitic-doubled IOs are high; non-clitic-doubled IOs are low (Demonte 1995: 10, Ex. (9))

    figure cj

Tamil also has a dative alternation—(69) is the double object construction, as evidenced by the dative marker -kku on the recipient instead of the preposition , which occurs in prepositional dative constructions. However, Sundaresan (2006) provides evidence from the distribution of dative in multiple contexts that, while the prepositional variant of IOs must be low, dative IOs can be either high or low. As such, it is difficult to tell whether the examples in (69) can be derived from clauses where the IO is base-generated higher than the DO. Sundaresan (2020) nonetheless argues that Tamil is a true counterexample to the DOMA, though the binding data are needed to prove it concretely.

To summarize, we find that the inherent case–marked IOs in Greek, Tamil, German, and Turkish and the prepositional IOs in Spanish all move as PPs in wh-questions. They cannot raise to subject position in the passive, nor do they block a DO passive when they wh-move through the edge of vP. For at least Greek, German, Spanish, and Turkish, it is clear that the absence of the DOMA is not due to the lack of the right structural context—these languages have double object constructions, and they have DO passives of double object constructions, which is the context in which we would expect to observe the DOMA. Tamil also potentially satisfies these criteria, but additional investigation is needed to be sure of the base positions of the internal arguments in the DOMA-less examples. The absence of the DOMA in those languages with double object constructions but without IO passives is expected on the present approach, given the morphosyntax of their IOs.

Thus far, I have shown that a number of languages with IO passives exhibit the DOMA, while a number of languages without IO passives do not. I proposed that the reason these two properties correlate (having IO passives and having the DOMA) is because wh-moving IOs can only block DO passives if they can be subjects themselves. If a language otherwise permits IOs to raise to nominative, they necessarily have a way to wh-move IOs as DPs through Spec vP as well.

The morphology on the IO transparently tracks its movement prospects in every language that we have seen. Morphologically bare IOs that move behave like DPs in that they can A-move in passives and block other DPs when they wh-move. Overtly case-marked/prepositional IOs always behave like PPs, which cannot raise to subject position or interact with DPs in wh-movement.

4.3 Apparent counterexamples

As Holmberg et al. (2019) point out, there are also some symmetric languages, such as Kinyarwanda and Luganda, that do not exhibit the DOMA.Footnote 23 In (78a) and (79b), we see an IO that appears to wh-move as a DP, despite the fact that the clause is a DO passive. This is surprising on the present account, because IO DPs are predicted to become the passive subject as they wh-move. In order for (78a) and (79b) to be good, the DO would have to be raising to Spec vP/TP and controlling agreement despite the fact that the IO already did so.

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    Kinyarwanda: no passive/wh-movement effect (Holmberg et al. 2019: 711, Ex. (64), reporting from Jean Paul Ngoboka, p.c.)

    figure ck
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    Luganda: no passive/wh-movement effect (Holmberg et al. 2019: 711, Ex. (65))

    figure cl

One of the parametric differences between Kinyarwanda and Luganda on the one hand and the other Bantu languages under discussion on the other hand is that Kinyarwanda and Luganda allow (1) multiple object markers and (2) applicative stacking (of e.g. locative, instrumental, and benefactive markers).

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    Zulu: only one object marker (Zeller 2012: 220, Exs. (2b), (2c))

    figure cm
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    Kinyarwanda: multiple object markers and stacked applicatives

    figure cn

Several analyses treat facts like (81) (and others) as evidence that there is something special about either the Kinyarwanda verb phrase or its applicative morpheme. For example, McGinnis and Gerdts (2004) propose that the Kinyarwanda applicative morpheme is a phase head, which licenses an additional specifier at its edge. Similarly, Zeller (2006) has argued that the Kinyarwanda verb phrase has an extra EPP feature that other languages lack. These extra specifier positions could be used to smuggle or leapfrog one argument past another within ApplP, before v is even merged. To capture such a move on the feature system outlined here, the Kinyarwanda Appl head would have to possess either an additional feature to license this movement or more internal structure to license smuggling.

If the DO can be smuggled or leapfrogged to the edge of ApplP, it obviates the DOMA by being accessible for A-movement as early as or before the IO can wh-move to Spec vP. An early-moved DO would become the outermost specifier of vP, promoting it to subject position, even in the presence of a wh-IO.Footnote 24

5 Conclusion

In this paper, I examined the morphosyntax of object wh-questions in active and passive contexts in several languages. I argued that the profile of subject agreement that we find in every case is explainable by assuming a particular order of Merge and Move operations in the derivation. In active, transitive clauses, we saw that a requirement to Merge an external argument forced external Merge to precede wh-movement, or else wh-movement would bleed the external argument from getting introduced. This order of operations, combined with a tucking in condition on wh-movement, resulted in a structure where the transitive subject necessarily controls subject agreement. As a result, transitive object questions have the morphosyntax of regular transitive clauses in the languages that we have looked at.

In languages with symmetric passives, one might have thought that we could construct passive examples analogous to the active ones, where one argument of a double object construction wh-moves but another one becomes the passive subject. This profile of wh-questions is theoretically available given that these languages otherwise permit either object of a double object construction to be the subject of a passive. We saw, however, with evidence presented by Holmberg et al. (2019), that this was only the case if the direct object wh-moves. When the indirect object wh-moves, it necessarily becomes the subject of the clause. In other words, questions built from passives of double object constructions must look morphosyntactically like subject questions whenever the IO wh-moves, but not when the DO wh-moves.

I argued that a smuggling approach to DO passives, combined with a weak economy condition on feature checking, accounts for this contrast. Since DO passives are contingent on an intermediate step of VP movement, but IO passives are not, the time at which IOs are considered for movement is earlier than the time at which DOs may be considered for movement. Whereas, in active transitive clauses, there is a possibility of merging the subject before wh-moving the object, in passives of double object constructions, I proposed that an economy condition would not permit VP movement to precede wh-movement of the IO. As a result, DO movement, which is contingent on VP movement, cannot be ordered before IO wh-movement either, accounting for the DOMA.

Lastly, I argued that this approach has both empirical and conceptual advantages over Holmberg et al.’s (2019) proposal to restrict wh-movement. Their approach treated the DOMA as an extrinsic Voice-related restriction on wh-movement, along the lines of Aldridge (2004) and Coon et al. (2014) for ergative extraction restrictions in Austronesian and Mayan languages respectively. While Holmberg et al.’s approach has some theoretical motivation from those other phenomena, I argued that it made the wrong predictions for passives of double object constructions cross-linguistically. They predicted that every language with DO passives of double object constructions should exhibit the DOMA, which was shown to be false for all of the languages in Sect. 4.2. On my proposal, all of those languages behave as predicted: their IOs cannot be passive subjects, and can therefore never bleed a DO passive. The present theory therefore has greater empirical coverage, is more straightforwardly learnable, and does not require us to adopt additional constraints on wh-movement.

Looking ahead, we might wonder what other domains in language exhibit Weak Economy. Van Urk and Richards (2015) argued that Multitasking in its original form was necessary to explain the profile of object movement in Dinka ditransitive questions. The present proposal has argued that ditransitive syntax involves a step of smuggling, however, in which case the present Weak Economy condition may better account for van Urk and Richards’ data than the original Multitasking, which did not consider competition between wh-movement and VP movement. However, a full reanalysis of their data would require an account of other language-specific properties of Dinka ditransitives, such as the V2-like nature of its object movement, which I leave to future research.

Outside of wh-movement in ditransitives, we expect Weak Economy to apply whenever a head has three features, and two elements are present that might jointly check them. Languages whose IOs control other operations like φ-agreement or clitic doubling are therefore good candidates for exhibiting Weak Economy (as we saw for Bantu object marking), assuming those other operations correspond to additional features on v. According to Weak Economy, an IO that can simultaneously control two operations on v should necessarily be targeted before smuggling takes place. Doing so might either block a DO passive or merely force a process involving the IO to precede DO raising. This is speculation, but it provides a space of parametric variation across languages that can be tested.