1) 动词+ 不定式
afford　 aim　　 appear　　agree　 arrange　　ask　　　be　　　 decide　bother　　care　　choose　　 come　　　 dare　　 demand　desire　　determine　　　　 expect　　　elect　　endeavor　　　　　hope　　　　　　　fail　 happen　 help　　hesitate　learn　 long　　　mean　　 manage　 offer　 ought　　 plan　　prepare　pretend　　 promise　refuse　seem　　 tend　　 wait　　　 wish　　　　 undertake
举例：　
　The driver failed to see the other car in time.
　　 司机没能及时看见另一辆车。
　I happen to know the answer to your question.
　　 我碰巧知道你那道问题的答案。

2）动词+不定式 ；　动词+宾语+不定式
ask, beg, choose, expect , hate, help intend like, love, need prefer, prepare, promise, want, wish…
　I like to keep everything tidy.　我喜欢每件东西都保持整洁。
　I like you to keep everything tidy.　我喜欢你年使每件东西都保持整洁。
I want to speak to Tom.　 我想和汤姆谈话。
I want you to speak to Tom.　 我想让你和汤姆谈话。

3） 动词+疑问词+ to
decide, know, consider forget, learn, remember, show, understand, see, wonder, hear, find out, explain, tell
　　Please show us how to do that. 请演示给我们如何去做。
　　There are so many kinds of tape-recorders on sale that I can't make up my mind which to buy.有这么多的录音机，我都拿不定主意买哪一种。

注意:疑问词带不定式在句中作成分时，谓语动词用单数。
　　 The question is how to put it into practice.
　　 问题是怎样把它付诸实施。