Theories of argument realization typically associate verbs with an argument structure and provide algorithms for the mapping of argument structure to morphosyntactic realization. A major challenge to such theories comes from the fact that most verbs have more than one option for argument realization. Sometimes a particular range of realization options for a verb is systematic in that it is consistently available to a relatively well-defined class of verbs; it is then considered to be one of a set of recognized argument alternations . Often—but not always—these argument alternations are associated morphological marking. An examination of cross-linguistic patterns of morphology associated with the causative alternation and the dative alternation reveals that the alternation is not directly encoded in the morphology. For both alternations, understanding the morphological patterns requires an understanding of the interaction between the semantics of the verb and the construction the verb is integrated into. Strikingly, similar interactions between the verb and the construction are found in languages that do not mark the alternations morphologically, and the patterns of morphological marking in morphologically rich languages can shed light on the appropriate analysis of the alternations in languages that do not mark the alternations morphologically.
Malka Rappaport Hovav
The Romance languages are characterized by the existence of pronominal clitics. Third person pronominal clitics are often, but not always, homophonous with the definite determiner series in the same language. Both pronominal and determiner clitics emerge early in child acquisition, but their path of development varies depending on clitic type and language. While determiner clitic acquisition is quite homogeneous across Romance, there is wide cross-linguistic variation for pronominal clitics (accusative vs. partitive vs. dative, first/second person vs. third person); the observed differences in acquisition correlate with syntactic differences between the pronouns. Acquisition of pronominal clitics is also affected if a language has both null objects and object clitics, as in European Portuguese. The interpretation of Romance pronominal clitics is generally target-like in child grammar, with absence of Pronoun Interpretation problems like those found in languages with strong pronouns. Studies on developmental language impairment show that, as in typical development, clitic production is subject to cross-linguistic variation. The divergent performance between determiners and pronominals in this population points to the syntactic (as opposed to phonological) nature of the deficit.