This paper is a study of the subclassification of English verbs in generative grammar. It is intended to discuss the subclassification of English verbs in terms of complement types and to investigate the problem of nonlocalization in complement constructions. Some verbs permit a "whether"-complement or a "that"-complement if and only if they are under the influence of indefinite elements like negation and interrogation. The nonlocalization is treated within the framework of modal structures. (Author)