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 ac
2、ross the 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
3、wish is 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：
4、They found 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
5、语，如：I have no idea 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
6、不定式的逻辑宾语。I have a 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 writ
7、e.He has something to say 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
8、see anything in the room.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
9、型 2：It is + of sb. to do sth.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 la
10、ugh than cry. (wrong)（2）在感官动词 see, hear, 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, can
11、not but , - Youd better remain where you are. 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 i
12、s _(照相). 9. What worries me is _(在会上该说些什么). 10. What 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)
13、. 17. I didnt expect _(问题那样复杂). 18. Did you notice _(有人离开房子吗)? 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
14、 book is _(不容易懂). 28. He liked new clothes so much that he spent all his 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 to 2. Our master often told us _ things for
15、 granted. A. not to have B. not to take C. didnt take D. not to make 3. Tell him _ the window. A. to shut not B. not to shut C. to not shut D. not shut 4. 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 to 5. Mrs. Smith warne
16、d her daughter _ after drinking. A. never to drive B. to never drive C. never driving D. never drive 6. The patient was warned _ oily food after the operation. A. to eat not B. eating not C. not to eat D. not eating 7. The workers want us _ together with them. A. work B. working C. to work D. worked
17、 8. They would not allow him _ across the enemy line. A. to risk going B. risking to go C. for risk to go D. risk going 9. I saw him _ out of the room. A. go B. had gone C. has gone D. goes 10. They knew her very well. They had seen her _ up from childhood. A. grow B. grew C. was growing D. to grow
18、11. Ive heard him _ about you often. A. spoke B. speaks C. speak12. Though he had often made his little sister _, today he was made _by his little sister. A. cry；to cry B. crying；crying C. cry；cry D. to cry；cry 13. He was made _. A. go B. gone C. going D. to go 14. John was made _ the truck for a we
19、ek as a punishment. A. to wash B. washing C. wash D. to be washing 15. Paul doesnt have to be made _. He always works hard. A. learn B. to learn C. learned D. learning 16. 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. where 17. There
20、 isnt any difference between the two. I really dont know _. A. where to choose B. which to choose C. to choose what D. to choose which 18. “ Have you decided when _?” “ Yes, tomorrow morning.” A. to leave B. to be leaving C. will you leave D. are you leaving 19. Last summer I took a course on _. A.
21、how to make dresses B. how dresses be made C. how to be made dresses D. how dresses to be made 20. He doesnt know _ to stay or not. A. whether B. if C. either D. if he will 21. She pretended _ me when I passed by. A. not to see B. not seeing C. to not see D. having not seen 22. - The light in the of
22、fice is still on. - Oh, I forgot _. A. turning it off B. turn it off C. to turn it off D. having turned it off 23. We agreed _ here but so far she hasnt turned up yet. A. having met B. meeting C. to meet D. to have met 24. Little Jim should love _ to the theatre this evening. A. to be taken B. to ta
23、ke C. being taken D. taking 25. I would love _ to the party last night but I had to work extra hours to finish a report. A. to go B. to have gone C. going D. having gone 26. Frank is the kind of person who people like to _. A. make friend with B. make friends of C. make friends D. make friends with
24、27. Go on _ the other exercise after you have finished this one. A. to do B. doing C. with D. to be doing 28. She reached the top of the hill and stopped _ on a big rock by the side of the path. A. to have rested B. resting C. to rest D. rest 29. Tom kept quiet about the accident _ lose his job. A.
25、so not as to B. so as not to C. so as to not D. not so as to 30. I need a day or two _. A. to think it over B. to think over C. of thinking 31. He was too excited _. A. speak B. to speak C. not to speak D. speaking 32. Charles Babbage is generally considered _ the first computer. A. to invent B. inv
26、enting C. to have invented D. having invented 33. He said he would rather not _ it right now. A. doing B. to do C. do D. to be doing 34. Rather than _ on a crowded bus, he always prefers _ a bicycle. A. ride； ride B. riding； ride C. ride； to ride D. to ride； riding 35. Its freezing outside. You _ pu
27、t on your overcoat. A. had better to B. had better C. would better D. would better to 36. The chair looks rather hard, but in fact it is very comfortable to _. A. sit B. sit on C. be sit D. be sat on 37. Im hungry. Get me something _. A. eat B. to eat C. eating D. for eating 38. - I usually go there
28、 by train. - Why not _ by boat for a change? A. to try going B. trying to go C. to try and go D. try going 39. She did nothing _ at the photo. A. except look B. but to look C. except to look D. but looking 40. I asked him to _ me a few minutes so that we could go over all the problems. A. spend B. s
29、pare C. save D. share 41. They wont let their teacher _ in that way. A. to be treated B. being treated C. treated D. be treated 42. John, you must get your room _ after breakfast. A. to be cleaned B. to clean C. cleaning D. cleaned 43. The problem _ at tomorrows meeting is a very difficult one. A. b
30、eing discussed B. discussed C. to be discussed D. to discuss 44. He reached the station _ only _ that the train had just left. A. tired； learned B. tiring； learning C. to tire； to learn D. tired； to learn 45. - Did that book give the information you needed? - Yes, but _, we had to read it almost ent
31、irely. A. for finding it B. to find it C. finding it D. by finding it 46. Im sorry I forgot _your dictionary. Lets borrow one from Li Ming. A. to take B. taking C. to bring D. bringing 47. She couldnt decide which restaurant _. A. to have lunch B. to eat C. to eat at D. eating at 48. This problem is
32、 said _ three times. A. to have been talked B. to have discussed C. having been discussed D. to have been talked about 49. Everybody believed the man _ away the diamond ring. A. be taken B. taking C. to take D. to have taken 50. I prefer _ rather than _. A. read； watch B. to read； watch C. reading；
33、to watch D. to read； to watch 参考答案：、1. To defend our motherland 2. to serve the people heart and soul 3. to talk like that 4. not to go on with the work 5. of me not to take your advice 6. to be a scientist 7. to study hard 8. to take photographs 9. what to say at the meeting 10. to get the work don
34、e as quickly as possible 11. to mention it in the letter 12. to carry the sacks of grain to safety 13. to be present at the meeting ( to attend the meeting) 14. how to use the computer 15. it impossible to make her change her mind 16. the patients to take a good rest 17. the problem to be so complic
35、ated 18. anyone leave the house 19. the earth support more people 20. him to come over here this evening 21. any question to ask 22. a way to send pictures by wireless 23. a lot of things to talk about 24. a man to think only of himself 25. for you to get up 26. to see her in such good health 27. no
36、t easy to understand 28. in order to be well dressed 29. so as to be heard by everybody 30. too angry to say a word、1-5 DBBAA 6-10 CCAAA 11-15 CADAB 16-20 BBAAA 21-25 ACCAB 26-30 DACBA 31-35 BCCCB 36-40 BBDAB 41-45 DDCDB 46-50 CCDDB 附：部分题目解析：1tell sb. not to do sth.告诉某人不做某事 2take sth. for granted “把
37、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 doing sth.冒险做某事 9. see sb. do sth.看见某人做某事 12. make sb
38、. 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. 继续做（与原来不相同的）事。此句可以从 the other exerc
39、ise 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 but 40spare 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”。
