抄録
Prepositions do not take that-clauses as complements. They nonetheless seem to take wh-clausal complements, as in her explanation of what (else) happened. However, such an analysis is mistaken both empirically and theoretically. Instead, I present an analysis in which what seems to be a preposition taking a wh-clausal complement is actually a complementiser that is inside the CP system. More specifically, the prepositional complementiser is argued to be in Force in Rizzi’s split CP structure. It is also claimed that the complementiser of is a realisation of genitive Case. This leads to the generalisation of the Visibility Condition on Case to the clause.
