This chapter focuses on another aspect of the relationship between the syntactic and phonological macromodules, namely the phenomenon that the morphology of an element can depend on whether it is realized in a local relation to a specific other element. It is argued that this phenomenon is not conditioned by syntactic adjacency, but results from a certain type of allomorphy rule that operates at the syntax-phonology interface (PF). Six case studies are discussed, concerning agreement weakening in Dutch and Standard Arabic, cliticization in Middle Dutch and Irish, and pro-drop in Old French and Arabic.
Keywords: agreement alternations, cliticization, pro drop, Arabic, Irish, Dutch, Old French