20120131初三英语动词不定式部分知识讲解及练习

学生姓名：上课时间：动词不定式一. 定义：动词不定式是非谓语动词的一种，它没有人称和数的变化，在句子中不能独立作谓语，但它仍保持动词的特点，既可以有自己的宾语和状语。

同时动词不定式又具有名词、形容词、副词的特征，在句中可以作主语、表语、宾语、宾语补足语、定语和状语。

二. 动词不定式的构成：to+动词原形三. 动词不定式作宾语1、作宾语She wanted to become an actor.后面能接不定式作宾语的动词有：agree, ask, choose, decide, forget, hope, learn, want, wish, would like等。

We hope to get there before dark. 我们希望天黑以前到那儿。

The girl decided to do it herself. 那个姑娘决定自己做那件事。

动词不定式作宾语的注意事项（2点）1). 有些动词既可跟不定式作宾语，也可跟动名词作宾语，但含义不同：remember to do 记住要做某事remember doing 记得曾经做过某事forget to do忘记要做某事forget doing 忘记曾经做过某事stop to do 停下来去做某事stop doing 停止做某事go on to do 继续做另一件事go on doing 继续做原来在做的事like doing 喜欢做……（与生俱来的，一般不容易改变）like to do 喜欢做……（后天形成的，很容易改变）I remember seeing you somewhere before.我记得以前在哪儿见过你。

Please remember to turn off the light when you leave.离开时请记得关好灯。

2). 不定式作宾语时，如带有宾语补足语，则要把不定式放到后面，用it作形式宾语，构成“主语+动词+it+宾补（形容词、名词）+不定式”结构。

如：He found it very difficult to get to sleep. 他发现很难入睡。

2、作状语Jim has come to live in China with his parent. Jim 来了，为了跟他的父母住在中国。

= To live in China with his parent, Jim has come. 为了跟他的父母住在中国，Jim 来了。

=In order to live in China with his parent, Jim has come. 为了跟他的父母住在中国，Jim 来了。

= Jim has come so a s to live in China with his parent. Jim 来了，为了跟他的父母住在中国。

3、作宾语补足语1）后面能接to不定式作宾语补足语的动词有：ask, order, teach, tell, want, wish, help等。

The teacher told us to do Exercise 1. 老师要我们做练习一。

I want both of you to go. 我要你们俩去。

We helped her (to) repair her bike. 我们帮助她修理自行车。

2）使役动词let, have, make及感官动词see, watch, notice, hear, feel等要以不带to的不定式作宾补。

Let’s have a rest. 我们休息一会吧。

I saw him come in. 我看见他进来了。

感官动词后既可跟不带to的不定式作宾补，也可跟v-ing作宾补，前者表示动作的全部过程已结束；后者表示动作正在进行。

I saw him come downstairs.我看见他下了楼。

（说明他下楼了这件事）I saw him coming downstairs.我看见他在下楼。

（说明他下楼时的情景）4、作定语Have you got anything to say?I had something to eat this morning.5、作主语，谓语用单数To learn a foreign language is not easy.To realize your dream through great effort is really cool!6、否定形式not + 动词不定式Tell him not to be late.The police told the boys not to play in the street.7、动词不定式跟疑问句连用动词不定式可以和what, which, how, where, when等引导的疑问词连用，构成不定式短语。

The question is when to start.I don’t know where to go.He showed me how to use a computer.Nobody told us what to do.注意：why 例外，后不能加动词不定式。

Why not+ 动词原形Why not go home？巩固练习：一. 根据上句意思完成下句，使两句意思相近或相同，每空一词。

1. He was so angry that he couldn’t say anything.He was too angry _______ ______ anything.2. I don’t know when we will have the meeting.I don’t know whe n _______ _______ the meeting.3. He said he would write a letter.He said he would have a letter ______ _______.4. That you read English in the morning is very important.It is very important _____ you _____ _______ English in the morning.5. He was so strong that he could lift the stone. （石头）He was strong _____ _____ ______ the stone.6. His father went to Beijing for his holiday.His father went to Beijing ________ ______ his holiday.7. They got up early so that they could get there in time.They got up early _____ ______ _______ ______ there in time.8. His brother decided that he would buy the book.His brother decided _____ _______ the book.9. He hopes that he can visit the Great Wall.He hopes _____ _______ the Great Wall.10.I saw him go into the room.He was seen _____ ______ into the room.11.We made him work five hours a day.He was made _____ ______ five hours a day.12.Do you want to say anything for yourself?Do you have anything _____ _____ fo r yourself?13.We don’t know what we shall do next.We don’t know what ____ _______ next.14.I’m very sorry on hearing the bad news.I’m very sorry _____ _______ the bad news.15.He stopped and had a look at me.He stopped _____ ______ a look at me.16.I helped him with his English.I helped him _____ ______ English.17.My father promised （许诺）that he would buy me a bike.My father promised ____ ______ me a bike.18.The box is so heavy that I can’t carry it.The box is too heavy ______ me _______ _______.19.“Lie down! ”the boy said to his dog.The boy ordered his dog ______ ______ down.20.“Don’t make any noise, ”she said to me.She told me ______ _______ ________ any noise.二. 单选：1. This company was the first ____ portable radios as well as ca ssette tape recorders in the wor ld.A. producingB. to produceC. having producedD. produced2. The purpose of new technology is to make life easier, ____it more difficult.A .not making B. not make C .not to make D. nor to make3. Helen had to shout ______above the sound of the music .A .making herself hear B. to make herself hearC. making herself heard D .to make herself heard4. I don’t know whether you happen_______ ,but I am going to study in the U.S.A this September.A .to be heard. B. to be bearing C .to hear D .to have heard5. The news reporters hurried to the airport, only ______the film stars had left.A .to tellB .to be toldC .tellingD .told6. Y ou were silly not _______your car.A. to lockB. to have lockedC. lockingD. having locked7. The teacher asked us ______so much noise.A .don’t make B. not make C. not making D .not to make8. An army spoke sman stre ssed that all the soldiers had been ordered _____clear warnings before firing any shots.A .to issue B. being issued C. to have issued D. to be issued9. I’d rather have a room of my own, however small it is, than_______ a room with someone else.A. to shareB. to have sharedC. shareD. sharing10. The bank is reported in the local newspaper_________ in broad daylight yesterday.A. robbedB. to have been robbedC. being robbedD. having been robbed11. A number of paintings in the castle are believed ________in a fire.A. being destroyedB. having been destroyedC. to be destroyedD. to have been destroyed12. The meeting _______ next week is sure to be a great succe ss.A. to take placeB. to be taken placeC. to have taken placeD. being taken place13. As a result of my laziness, I failed ________ my work in time.A. and finishedB. to finishC. and finishingD. to finished14. I am sorry ______ written you a letter at the time.A. to have notB. to not haveC. not to haveD. not having15. Will you lend him a magazine _________?A. to be readB. for readingC. to readD. he read16. He could do nothing but _______for the bus _________.A. wait, to comeB. wait; comeC. waiting; comingD. waited; came17 .It is a problem that doesn't need ________ right now.A. to solveB. solvingC. being solvedD. to be solving18. There’s a man at the reception desk who seems very angry and I think he means _______ trouble.A. makingB. to makeC. to have madeD. having made19. I remember _______him _______the bike needed __________.A. hearing, saying, to repairB. to hear, say, to repairC. hearing, say, repairingD. to hear, saying, to be repaired20. --- Y ou should have thanked her before you left.--- I meant _________, but when I was leaving I couldn’t find her anywhere.A. to doB. toC. doingD. doing so21. Robert is said to __________ abroad, but I don’t know what country he studied in.A. to have studiedB. to study B. to be studying D. to have been studying22. I’m gong to Xi’an next week. Have you anything __________ to your parents?A. to takeB. to be takenC. to be bought toD. to buy23. when are they __________ in their plan?A. handB. handedC. to handD. give24. In such dry weather, the flowers will have to be watered if they _____________.A. have survivedB. are to surviveC. would survivedD. will survive25. When we hurried to the station, there happened ________ no bus at that time.动词不定式练习参考答案一 .1. to say2. to have3. to write4. for, to, read5. enough, to lift6. to spend7. in, order, to, get8. to buy 9. to visit 10. to go 11. to work 12. to say13. to do 14. to hear 15. to have 16. to learn（study）17. to buy 18. for, to carry 19. to lie 20. not, to make二.1---10 BCDDB BDACB 11---20 DABCC ABBCB 21---25 ABCBB。