NEGATION AND MODALITY
The status of Negation in clause structure has been extensively discussed in the recent syntactic literature (Pollock (1989), Ouhalla (1990), Zanuttini (1991), Laka (1990)). One of the assumptions shared to a large extent by these researchers is the functional status of Negation and its independent projection in clause structure. In addition, (sentential) Negation is argued to be an Operator-like element in that its scope domain extends over the whole clause. This is formally expressed at LF where movement of the Negative element to sentence-initial position defines its domain of c-command.