1、北 京 四 中撰稿老师：黄浩编审老师：蔡正礼责任编辑：丁华动词不定式的用法讲解及练习题不定式既具有动词的一些特征，又具有名词，形容词和副词的句法功能否定式：not +不定式不定式的时态一般说来，不定式一般式表示的动作有时与限定动词表示的动作同时发生，也有时发生在限定动词表示的动作之后。如：Who heard him say that?He seems to know this.I hope to see you again.不定式进行式表示动作正在进行，通常与限定动词表示的动作同时发生，如：They are said to be building another bridge across t
2、he river.I happened to be going that way too.不定式完成式表示的动作发生在限定动词表示的动作之前，如：I am sorry to have given you so much trouble.I am glad to have seen your mother. 不定式的句法功能：（1）作主语To talk with him is a great pleasure.不定式短语作主语时，为了保持句子的平衡，往往以it作形式主语，而把不定式短语置于谓语动词之后，如：Its nice to hear your voice.（2）作表语Her wish is
3、 to become an artist. （3）作宾语常用于及物动词: want , hope, wish, like, need, hate, offer, prefer, begin, start, attempt, decide, determine, expect, promise, pretend, refuse ,afford, manage, help等之后，如：You should continue to learn as long as you live.注1：如果作宾语的不定式又有自己的补语，则须用先行词it 作形式宾语，而将真正的宾语不定式后置，如：They found
4、 it impossible to get everything ready in time. 注2：不定式一般不能作介词的宾语，只有在极少数介词如:but, except等后边才行。此时不定式可以带to或不带to,如：In very cold winter weather a cold-blooded animal has no choice but to lie down and sleep.There was nothing left to do but clean the windows.(前边有do, to 省略)但“疑问词+不定式”结构可以作介词的宾语，如：I have no id
5、ea about what to do next. （4）作宾语补足语通常用于及物动词或动词短语：want ,wish, ask, order, beg, tell, permit, know, help, advise, persuade, allow, prepare, cause, force, require, call on, wait for等之后，如：The teacher asked the students to hand in their homework.（5）作定语不定式作定语时，须放在被它修饰的名词或代词之后。被修饰的名词或代词往往是不定式的逻辑宾语。I have a
6、 lot of work to do.当作定语的不定式所修饰的名词或代词是不定式动作的承受者时，不定式既可用主动语态，又可用被动语态，但其含义有所不同。所以如果修饰名词的不定式的动作是主语作的, 不定式用主动。试比较：Have you anything to send?你有什么东西要寄吗？(不定式to send 的逻辑主语是you)Have you anything to be sent?你有什么要(我或别人)寄的东西吗？(不定式to be sent的逻辑主语是已被省略的me或someone else)Ive got letters to write.He has something to s
7、ay to you. （6）作状语作修饰动词的目的状语We must do everything we can to help them.作修饰动词的结果状语加强意料不到的语气，在表示结果的不定式前还可加only，如：I went to see him only to find him out. 作修饰表语形容词的状语: 修饰形容词的不定式用主动:The chair is comfortable to sit in.作结果状语或程度状语。too+形容词(或副词)+to do 太-(以致)不能(做)It is too dark for us to see anything in the room
8、.形容词(或副词)+ enough +to do -足以(做)Is the boy old enough to go to school? （7）作独立成分To tell you the truthTo cut a long story shortTo begin with (首先) 不定式的复合结构“for+名词(或代词宾语)+to do sth.”这种结构中的for本身无意义，for后的名词或代词(宾格)是不定式的逻辑主语This is for you to decide.句型1：It is + for sb. to do sth.句型2：It is + of sb. to do sth.
9、good, kind, nice, wise, unwise, clever, silly, stupid, foolish, right, wrong, rude, impolite, careless, naughty等不定式省去to的情况（1）当两个或两个以上的不定式并列在一起时，第一个不定式带to ，后面的不定式往往把to省去。如：I wished to finish my homework and (to )get away.但是，如果是在对照的场合，则不可以省去 “to”，如：It is better to laugh than cry. (wrong)（2）在感官动词see, h
10、ear, feel, watch, notice, observe, listen to ,look at和使役动词let, make, have的复合宾语中，不定式须省去to。如：I am a doctor. Let me examine you.（3）在help的复合宾语中，不定式可以带to也可以不带to.He often helps me (to)do my home work.（4）had better, had best, would rather, would rather- than, cannot but , - Youd better remain where you are
11、. 精选练习、翻译句子1. _(保卫祖国) is our sacred duty.2. It is an honor _(全心全意为人民服务).3. It was not correct _(那样谈话).4. It was a mistake _(不继续这项工作).5. It was stupid _(我没有采纳你的意见).6. Her wish is _(当一名科学家).7. Our main task is _(努力学习).8. The main purpose of a camera is _(照相).9. What worries me is _(在会上该说些什么).10. What
12、I wanted was _(使这项工作尽快完成).11. I forget _(在信里提那件事了).12. Without hesitation Lao Li stopped his truck and helped _ (把一袋袋的粮食运到安全的地方).13. Would you like _(出席这次会议).14. Ill show you _(怎样使用计算器).15. I found _(不可能使她改变主意).16. The doctor told _(病人们好好休息).17. I didnt expect _(问题那样复杂).18. Did you notice _(有人离开房子吗)
13、?19. Man must make _(地球养活更多的人).20. You must get _(他今晚到这里来一趟).21. Do you have _(什么问题要问)?22. John Baird found _(用无线电传送图像的方法).23. There are _(很多事情要谈)24. He is not _(只想自己的人).25. Its time _(你起床).26. He was delighted _(看见她身体这样好).27. This book is _(不容易懂).28. He liked new clothes so much that he spent all h
14、is time and all his money _(为了穿得漂亮).29. You must speak louder _(以便让大家都听见).30. She was _(气得说不出一句话来).、单项选择1. The teacher told them _ make so much noise.A. dont B. not C. will not D. not to2. Our master often told us _ things for granted.A. not to have B. not to takeC. didnt take D. not to make3. Tell
15、him _ the window.A. to shut not B. not to shutC. to not shut D. not shut4. The boy wanted to ride his bicycle in the street, but his mother told him _.A. not to B. not to do C. not do it D. do not to5. Mrs. Smith warned her daughter _ after drinking.A. never to driveB. to never driveC. never driving
16、 D. never drive6. The patient was warned _ oily food after the operation.A. to eat not B. eating not C. not to eat D. not eating7. The workers want us _ together with them.A. work B. working C. to work D. worked8. They would not allow him _ across the enemy line.A. to risk going B. risking to goC. f
17、or risk to go D. risk going9. I saw him _ out of the room.A. go B. had gone C. has gone D. goes10. They knew her very well. They had seen her _ up from childhood.A. grow B. grew C. was growing D. to grow11. Ive heard him _ about you often.A. spoke B. speaks C. speak12. Though he had often made his l
18、ittle sister _, today he was made _by his little sister.A. cry；to cry B. crying；cryingC. cry；cryD. to cry；cry13. He was made _.A. go B. gone C. going D. to go14. John was made _ the truck for a week as a punishment.A. to wash B. washing C. wash D. to be washing15. Paul doesnt have to be made _. He a
19、lways works hard.A. learn B. to learn C. learned D. learning16. Therere so many kinds of tape-recorders on sale that I cant make up my mind _ to buy.A. what B. which C. how D. where17. There isnt any difference between the two. I really dont know _.A. where to choose B. which to chooseC. to choose w
20、hat D. to choose which18. “ Have you decided when _?”“ Yes, tomorrow morning.”A. to leave B. to be leavingC. will you leave D. are you leaving19. Last summer I took a course on _.A. how to make dressesB. how dresses be madeC. how to be made dresses D. how dresses to be made20. He doesnt know _ to st
21、ay or not.A. whether B. if C. either D. if he will21. She pretended _ me when I passed by.A. not to see B. not seeingC. to not see D. having not seen22. - The light in the office is still on.- Oh, I forgot _.A. turning it off B. turn it offC. to turn it off D. having turned it off23. We agreed _ her
22、e but so far she hasnt turned up yet.A. having met B. meeting C. to meet D. to have met24. Little Jim should love _ to the theatre this evening.A. to be taken B. to take C. being taken D. taking25. I would love _ to the party last night but I had to work extra hours to finish a report.A. to go B. to
23、 have gone C. going D. having gone26. Frank is the kind of person who people like to _.A. make friend with B. make friends ofC. make friends D. make friends with27. Go on _ the other exercise after you have finished this one.A. to do B. doing C. with D. to be doing28. She reached the top of the hill
24、 and stopped _ on a big rock by the side of the path.A. to have rested B. resting C. to rest D. rest29. Tom kept quiet about the accident _ lose his job.A. so not as to B. so as not toC. so as to not D. not so as to30. I need a day or two _.A. to think it over B. to think over C. of thinking31. He w
25、as too excited _.A. speak B. to speak C. not to speak D. speaking32. Charles Babbage is generally considered _ the first computer.A. to invent B. inventingC. to have invented D. having invented33. He said he would rather not _ it right now.A. doing B. to do C. do D. to be doing34. Rather than _ on a
26、 crowded bus, he always prefers _ a bicycle.A. ride； ride B. riding； rideC. ride； to ride D. to ride； riding35. Its freezing outside. You _ put on your overcoat.A. had better to B. had betterC. would betterD. would better to36. The chair looks rather hard, but in fact it is very comfortable to _.A.
27、sit B. sit on C. be sit D. be sat on37. Im hungry. Get me something _.A. eat B. to eat C. eating D. for eating38. - I usually go there by train.- Why not _ by boat for a change?A. to try going B. trying to goC. to try and go D. try going39. She did nothing _ at the photo.A. except lookB. but to look
28、C. except to look D. but looking40. I asked him to _ me a few minutes so that we could go over all the problems.A. spend B. spare C. save D. share41. They wont let their teacher _ in that way.A. to be treated B. being treatedC. treated D. be treated42. John, you must get your room _ after breakfast.
29、A. to be cleaned B. to cleanC. cleaningD. cleaned43. The problem _ at tomorrows meeting is a very difficult one.A. being discussed B. discussedC. to be discussed D. to discuss44. He reached the station _ only _ that the train had just left.A. tired； learnedB. tiring； learningC. to tire； to learn D.
30、tired； to learn45. - Did that book give the information you needed?- Yes, but _, we had to read it almost entirely.A. for finding it B. to find itC. finding it D. by finding it46. Im sorry I forgot _your dictionary. Lets borrow one from Li Ming.A. to take B. taking C. to bring D. bringing47. She cou
31、ldnt decide which restaurant _.A. to have lunch B. to eatC. to eat at D. eating at48. This problem is said _ three times.A. to have been talked B. to have discussedC. having been discussed D. to have been talked about49. Everybody believed the man _ away the diamond ring.A. be taken B. taking C. to
32、take D. to have taken50. I prefer _ rather than _.A. read； watch B. to read； watchC. reading； to watch D. to read； to watch参考答案：、1. To defend our motherland2. to serve the people heart and soul3. to talk like that4. not to go on with the work5. of me not to take your advice6. to be a scientist7. to
33、study hard8. to take photographs9. what to say at the meeting10. to get the work done as quickly as possible11. to mention it in the letter12. to carry the sacks of grain to safety13. to be present at the meeting ( to attend the meeting)14. how to use the computer15. it impossible to make her change
34、 her mind16. the patients to take a good rest17. the problem to be so complicated18. anyone leave the house19. the earth support more people20. him to come over here this evening21. any question to ask22. a way to send pictures by wireless23. a lot of things to talk about24. a man to think only of h
35、imself25. for you to get up26. to see her in such good health27. not easy to understand28. in order to be well dressed29. so as to be heard by everybody30. too angry to say a word、1-5 DBBAA 6-10 CCAAA 11-15 CADAB 16-20 BBAAA21-25 ACCAB 26-30 DACBA 31-35 BCCCB 36-40 BBDAB41-45 DDCDB 46-50 CCDDB 附：部分题
36、目解析：1tell sb. not to do sth.告诉某人不做某事2take sth. for granted “把某事想当然”， 是一个固定词组。Eg. You shouldnt take it for granted that everyone should help you.你不要认为每个人都理应帮助你。4. 不定式的省略要保留到to,否则就完整地表达， 如:but his mother told him not to do so.5. warn sb. not to do sth. 此处用never替代not.8. allow sb. to do sth.允许某人做某事；risk
37、 doing sth.冒险做某事9. see sb. do sth.看见某人做某事12. make sb. do 让某人做某事， 但用于被动结构后， 则要用不定式符号to连接。16which 用于有范围中的“哪一个”， 此处作buy的宾语。18when +to do 做decide的宾语， 若用when引导宾语从句，用陈述句语序。21. pretend to do 假装做某事。22forget to do sth. 忘记（要）做某事。24should love to be taken to 愿意被带去25因为状语是last night，用不定式的完成式表示本想27go on to do sth
38、. 继续做（与原来不相同的）事。此句可以从the other exercise断定。28stop to do sth. 停下来（去）做32被动语态后用不定式连接，根据句意用完成式。33would rather not do sth. 宁愿不做某事。34prefer to do sth. rather than do sth. 宁愿做不愿做37to eat 此处作something 的定语。for +doing多表用途。38why not do sth.“为什么不” ；try doing sth.试一试39Do nothing but do sth. 此处用except替代but40spare sb. sth.匀出、腾出， 宾语为sb.； share分享， 宾语为sth.41let sb. do, 此处用的是被动语态42get sth. done让某事被做44tired此处是过去分词， 表示主语的状态。only to learn此处的不定式表结果。45此处的to find it, 表示目的47to eat at the restaurant, 介词at不能丢48此处使用的是不定式的完成被动式。表示“曾经被讨论过三次”。
