In this chapter we have briefly set down many of the theoretical mechanisms which we will be using in the rest of the book to describe syntactic phenomena in English. There is a lot more to say on theoretical issues and many differences of opinion as to how they should be formulated. However, as it is not our intention to teach all the details of the theory, but merely to use it, we will not go into these issues and the interested reader is directed to other text books, such as Haegeman (1994), Webelhuth (1995) or Radford (2004) for more detailed discussion on theoretical issues.
8.1.2 Clauses without IP
But this proposal claims that the head of the predicate is no longer the head of the whole clause and hence it no longer determines the categorial status of the clause. It would be difficult therefore to account for the observations of (30) and (31) where different verbs subcategorise for different small clauses in terms of the category of the predicate. A separate question concerning (34) is what the status of X is. Haegeman (1994) argues that this head is an agreement element, i.e. what we have been calling I. Thus small clauses, according to Haegeman, are IPs (AgrPs in her terminology):