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1、 动词不定式没有人称和数的变化，在句动词不定式没有人称和数的变化，在句中不能独立作谓语，因此是非谓语动词形中不能独立作谓语，因此是非谓语动词形式之一，具有名词、形容词和副词的特征，式之一，具有名词、形容词和副词的特征，在句中可以作主语、宾语、宾语补足语、在句中可以作主语、宾语、宾语补足语、定语、表语和状语等多种成分。定语、表语和状语等多种成分。动词不定式的否定形式动词不定式的否定形式 not + to do。e.g. She pretended not to see me when I passed by. 我走过的时候，她假装没看见。我走过的时候，她假装没看见。1) 动词不定式作主语动词不定
2、式作主语 e.g. To study hard is important. 努力学习是重要的。努力学习是重要的。 want to do something, agree to do something, decide to do something, need to do something, start to do something, forget to do something, hope to do something, continue to do something 这些放在谓语动词之后的不定式其实这些放在谓语动词之后的不定式其实是谓语动词的宾语。但是，我们可以不是谓语动词的宾语。
3、但是，我们可以不用太多关注其句子成分，按照固定搭配用太多关注其句子成分，按照固定搭配记忆即可。记忆即可。e.g.I like singing, but I dont like to sing today. 我喜欢唱歌，可今天不想唱。我喜欢唱歌，可今天不想唱。3) 动词不定式作表语动词不定式作表语e.g. To see is to believe. 眼见为实。眼见为实。4) 动词不定式作状语动词不定式作状语 不定式可以作目的状语，作目的状语不定式可以作目的状语，作目的状语 可以放在句末，也可以放在句首。可以放在句末，也可以放在句首。 e.g. We have come to learn from
4、 you. To watch baseball, go to the Yankee Stadium. 5) 动词不定式作定语动词不定式作定语 动词不定式作定语一般是表示物体的动词不定式作定语一般是表示物体的 用途或者要做的事情等。记住在用途或者要做的事情等。记住在way, time, chance, place之后用之后用to do。 e.g. The best place to sit is in the front row. 6) 动词不定式作宾语补足语动词不定式作宾语补足语 e.g. I asked him to show me the new dictionary. 我让他把新字典给我
5、看看。我让他把新字典给我看看。1. Dont forget _ the letter.A. to send B. send C. sending D. being sent2. The chair looks very old, but in fact it is very comfortable to _.A. sit B. sit on C. be sat D. be sat on 3. Is _ necessary to return the book tomorrow?A. this B. that C. it D. which 4. Im afraid they would not
6、allow him _ here.A. to smoke B. smoking C. smokes D. smoke5. Mother told me _ the water before I drank it. A. boiling B. boiled C. boil D. to boil 6. On my way home, I stopped _ some food. A. buy B. to buy C. buying D. bought7. John was made _ the car for a week as a punishment. A. to wash B. washin
7、g C. wash D. to be washing8. The sitting-room needs _, but itll have to wait until Saturday. A. be cleaning B. to be cleaned C. clean D. being cleaned9. The first thing I want to do is _. A. visit to him B. to visit him C. visiting him D. visited him10. Li Yang advised me _ too much, otherwise I would have been drunk. A. not to drink B. to drink C. not drinking D. drinking