The reanalysis of grammaticalized prepositions in Middle English

During the Middle English period, a number of prepositions grammaticalize. I examine three of these (namely for(to), to and on) and argue that they come to be associatmwith verbal features as well as future, tense and aspect. As this happens, they change their structural positions and are reanalyzed as C(omplementizer), I(inflection) and ASP(ect) respectively. The latter categories are assumed by the language user as a response to the affiliation of the verbal features of for(to), to and on.