Generalized Verb Movement
Recent work in syntactic theory has developed two far-reaching ideas: the extension of the X′-schema to the projection of functional heads (Chomsky 1986a) and a more articulated and abstract conception of sentence structure (Pollock 1989; Chomsky 1989). These two ideas have been shown to interact in a very productive way once they are combined with the general principles of UG. The proposals that head movement processes are Structure Preserving in Emonds’ (1976) sense and that they are constrained by the general ECP (Baker 1988) play a crucial role in this connection. Pollock’s (1989) article has convincingly shown that, once this set of assumptions is adopted and put into work, previously mysterious phenomena related to word order variations and adverb placement can be given a rational account.