of thing that could happen [only in America]. (PP) The problem is [only temporary]. (AdjP) He agreed [only somewhat reluctantly] to help us. (AdvP) He apparently [only works two days a week]. (VP) Only disturb me if there’s a genuine emergency. (Imperative clause) (They cannot, however, modify any other kind of main clause than an imperative.) (Huddleston & Pullum 2002) 10