在及物动词begin, cease, choose, continue, decide, expect, fail, forget, happen, hate, help, hope, intend, like, love, manage, mean, offer, plan, prefer, prepare, promise, refuse, remember, try, want, wish 等后边常用不定式作宾语。 动词不定式也可作介词but, except, save（除......以外）的宾语，但在词组can not but （不由得，只好）, cannot help but（不得不）, do nothing but（别无它法只有......）后面，接不带 to 的不定式。在except, save 后可带to也可不带 to。 有些动词如allow, advise, ask, beg, believe, can’t bear, call, choose, cause, co**and, determine, enable, expect, fail, feel, find, force, get, have, hear, help, know, invite, lead, let, like, make, notice, order, prove, request, set, see, teach, tell, think, want, warn, watch, wish等后面常跟动词不定式作宾语补足语。 有些动词如consider, prove, think, know, feel, suppose, discover, imagine, find 等也可跟 “宾语 + to be”的形式，使用中应注意