What VP Ellipsis Can Do , and What it Can t , but not Why

These contrasts are typically thought to involve licensing conditions that the environment to the left of the ellipsis invoke. The contrast between (4a) and (4b), for instance, indicates that the ellipsis site must be in construction with, or perhaps governed by, a member of “Aux,” where these can be understood to be just those terms that are able occupy the highest of the functional projections which clauses are made up of. The modal, won’t, is an Aux, as is the infinitival to and the auxiliaries have, be and do in (5).