Expletive it in the Object Position

In English there appears a nominal expression without any theta role in a sentence. It is called expletive. According to the Projection Principle proposed by Chomsky (1981), no element without theta role can be placed in a strictly subcategorized position. If the expletive it indeed appears in the sister position to V, the Projection Principle cannot be maintained as argued by Postal and Pullum (1988). In this paper, I focus on the generation of the expletive it in relation to the extraposed clause. I make a claim that the expletive it is generated in the SPEC of CP of the extraposed clause when it is thematized and that it moves into the SPEC of v*P of the matrix clause to check off the EPP feature of v* at PF. Since it is not generated in and moved into a theta position, the Projection Principle is not nullified in my proposal.