The syntactic structure of French auxiliaries

While a consensus has been reached about the monoclausality of the Romance construction with an auxiliary verb and its verbal complement, questions remain about its syntactic structure. We focus here on French auxiliaries-the past tense auxiliaries (avoir and etre), and the passive auxiliary (etre)-which are unique in French in contributing only tense and aspect and triggering obligatory clitic climbing. Three syntactic structures have been proposed for such auxiliaries: a VP complement analysis, a verbal complex analysis, and a 'flat' VP analysis. We show here, working within a HEAD-DRIVEN PHRASE STRUCTURE GRAMMAR framework and basing our arguments on classical constituency tests, bounded dependencies, and lesser-known properties of a subset of manner adverbs, that the flat-structure analysis is to be preferred for tense auxiliaries, which take as their complements the bare participle as well as the complements subcategorized by this participle and 'inherited' from it. In contrast, the passive auxiliary, which we identify with the copula, has a predicative complement with different realizations: either an ordinary phrase, 'saturated' for its complements, or a 'partial' complement, where the predicative head lets some or all of its complements be inherited by the auxiliary. Our analysis allows for a solution to the well-known problem of auxiliary selection, which, we argue, should not be taken as an indicator of syntactic structure but is best handled via lexical constraints.*