The literature on the syntax of verbless predication in Arabic is rich, but little attention has been given to the ‘pronominal copula’, PRON. Its main characteristics are well-known: it only takes the form of third person independent pronouns; it is limited to equational sentences, in which the predicate is a definite noun phrase; and it must always occur between the subject and the predicate nominal. A standard view (e.g. Eid 1991, and more recently, Ouhalla 2013) has been to assume that PRON, like its verbal counterpart KN, realizes subject agreement in T. In this paper, I examine the syntax of PRON and review its characteristics in contrast with those of KN. I show that the complex distribution of PRON challenges the standard view and supports an alternative analysis. I propose that equational sentences are underlyingly more complex than predicational verbless sentences: they project an extra functional head F between T and the small clause structure, PredP, in which the non-verbal predicate and its subject are generated. PRON is in FP, while KN is in T. I argue that, because equational sentences involve two elements of the same category, i.e. DP, they are subject to the Distinctness Condition of Richards (2010). FP provides the Spell-Out domain boundary necessary to avoid a Distinctness violation. Finally, I suggest that FP is always headed by a pronominal element that functions as a linker (Philip 2012, Franco et al. 2015), a syntactic head which marks an existing grammatical relation, namely predication, between two DPs. More broadly, my account is in line with the view that the identity/predicational divide in copular sentences corresponds to a difference in syntactic structure.
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