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英语词法专题讲座十一：非谓语动词 一、动词不定式 1. 动词不定式作宾语。 1). 在动词want, hope, would like, decide, wish, choose, try, need等后常用动词不定式作宾语。 He found it difficult _______(get) to sleep. 3). stop to do sth / stop doing sth stop to do sth 停下来去做某事 stop doing sth 停止正在做的事。 After working for a long time, He has to stop _______(have ) a rest. He was very tired, so he had to stop ______(work). 2. 动词不定式作宾语补。 1). 带to的不定式作宾补的动词有：ask / like /would like /teach /tell /want /help +sb +to do sth Please ask him _________(come) quickly. 2). 省掉to的不定式作宾补的动词有：let /make / hear /see /notice /have/watch+sb +do sth 注：省掉to的不定式的句子变被动语态时，需要还原to. He made the baby _______(stop) crying. The baby was made ______ _____ crying. 3. 动词不定式作主语 1). 动词不定式常可用作句子的主语时，谓语动词用单数形式。 2). 常用it作形式主语，而将不定式放在句子后面。 To do sth +谓语动词+adj /n = | 
