Changing EPP parameters

This chapter starts with a description of the core facts concerning the VPAux/AuxVP alternation in the history of Latin. In the case of modal verbs and infinitives, there is a clear decline of the head-final order VPAux, whereas Late Latin BE-periphrases surprisingly prefer this order. Against the backdrop of these observations, the discussion then turns to the analysis of Classical and Late Latin clause structure. It is proposed that during the transition from Classical to Late Latin, a major parametric change took place related to the way the clausal EPP-requirement is satisfied. In the earlier grammar (‘Grammar A’), the entire VP undergoes A-movement to the high T-domain, resulting in the characteristic VPAux word order. In the later grammar (‘Grammar B’) the EPP-requirement is met by means of verb movement, with the VP staying in situ. In this grammar VPAux-orders are derived through roll-up movement, which is incompatible with the VOAux-pattern.