First, the relationship between the negative sentence and the correction clause of a PCN is quite different from that of an MN. While the follow-up clause in a PCN provides the reason for denying the existence of the entities or event presupposed by asserting the negative sentence, the correction clause of the MN has the role of correcting or replacing the negative clause, pointing out the inappropriateness of asserting it. This difference in the role of the follow-up clause is reflected I the syntactic structure. That is, negative clause and correction clause usually have the same syntactic structure in MNs. When the negative clause is a transitive verb construction, so , is the corresponding correction clause. If the negative involves an transitive predicate, so, does the corresponding follow-up clause.