动词不定式的用法讲解及练习题 北 京 四 中 (2)
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 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：
It's nice to hear your voice.
（2）作表语
Her 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：
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)
I've got letters to write.
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 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 truth
To cut a long story short
To 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.
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, 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, cannot but , --- You'd better remain where you are.
精选练习
Ⅰ、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 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. I'll 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 didn't 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. It's 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 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).
Ⅱ、单项选择
1. The teacher told them ________ make so much noise.
A. don't
B. not
C. will not
D. not to
2. Our master often told us _______ things for granted.
A. not to have
B. not to take
C. didn't 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 warned 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
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
11. I've heard him _______ about you often.
A. spoke
B. speaks
C. speak
12. 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 week as a punishment.
A. to wash
B. washing
C. wash
D. to be washing
15. Paul doesn't have to be made _______. He always works hard.
A. learn
B. to learn
C. learned
D. learning
16. There're so many kinds of tape-recorders on sale that I can't make up my mind _______ to buy.
A. what
B. which
C. how
D. where
17. There isn't any difference between the two. I really don't 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. how to make dresses
B. how dresses be made
C. how to be made dresses
D. how dresses to be made
20. He doesn't 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 office 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 hasn't 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 take
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
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. 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. inventing
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. It's freezing outside. You _______ put 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. I'm hungry. Get me something _________.
A. eat
B. to eat
C. eating
D. for eating
38. --- I usually go there 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. spare
C. save
D. share
41. They won't 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 tomorrow's meeting is a very difficult one.
A. being 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 entirely.
A. for finding it
B. to find it
C. finding it
D. by finding it
46. I'm sorry I forgot ______your dictionary. Let's borrow one from Li Ming.
A. to take
B. taking
C. to bring
D. bringing
47. She couldn't decide which restaurant _______.
A. to have lunch
B. to eat
C. to eat at
D. eating at
48. This problem is 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； to watch
D. to read； to watch
参考答案：
Ⅰ、
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 done 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 complicated
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. not 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
Ⅱ、
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：
1．tell sb. not to do sth.告诉某人不做某事
2．take sth. for granted “把某事想当然”，是一个固定词组。
Eg. You shouldn't 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. 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。
16．which 用于有范围中的“哪一个”，此处作buy的宾语。
18．when +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。
22．forget to do sth. 忘记（要）做某事。
24．should 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……
27．go on to do sth. 继续做（与原来不相同的）事。此句可以从the other exercise 断定。
28．stop 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。
33．would rather not do sth. 宁愿不做某事。
34．prefer to do sth. rather than do sth. 宁愿做……不愿做……
37．to eat 此处作something 的定语。for +doing多表用途。
38．why not do sth.…“为什么不……”；try doing sth.试一试
39．Do nothing but do sth. 此处用except替代but
40．spare sb. sth.匀出、腾出……，宾语为sb.； share分享，宾语为sth.
41．let sb. do, 此处用的是被动语态
42．get sth. done让某事被做
44．tired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
47．to 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”。
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语法：动词不定式 动词不定动式是一种非谓语动词形式，它没有人称和数的变化，在句子中不能作谓语，但可以作除谓语之外的其它任何句子成分（主语、表语、宾语、宾语补足语、定语和状语）；动词不定式具有名词、形容词和副词的特征，同时还保持动词的某些特点，既可以有自己的宾语和状语，动词不定式和它的宾语和状语构成不定式短语。 一、构成：to do .否定式not to do 二、常见时态：一般时to do 进行时to be doing 完成式to have done 完成进行式to have been doing 三、动词不定式在句子中的成分 1、作句子的主语:现实中常用it作形式主语，而把真正的主语动词不定式（或短语）后 置。 比较下列句子 To lear n from your frie nds is importa nt.=lt is importa nt to lear n from your frie nds . ______ To leave without say ing goodbye is impolite.= It is impolite to leave without saying ________ goodbye. To chat with Miss White is a pleasa nt thi ng.=lt is a pleasa nt thi ng to chat with Miss ______ White. To walk to school takes me ten minu tes.=lt takes me ten minu tes to walk to school. _______ 句型总结 It is + adj. + of sb. to do sb：?i= are +adj. +to do 在以某些表示人的品质、特征等的形容词（如kind、good、nice、wrong、clever、right等）作表语时，不定式之前常加一个引起的短语，说明不定式指的是谁的情况（可以理解为某人的好，坏，聪明，愚蠢，对，错等等）。 It is very kind of you to help me. It ' s not polite of himto speak to old people like that. It is + adj. + for sb. to do …乞aisb+Odj. +to do 女:果要说明不定式表示的动作是谁做的，则在不定式前加一个for引起的短语，即不定式的逻辑主语。 It is n ecessary for us to study hard ___ It is easy for him to speak En glish. 动词不定式作主语练习 1. It's our duty the room every day. A. to clea n B. clea ned C. clea n D. cleans（甘肃省）
动词不定式用法大全
动词不定式用法大全 英语动词的非谓语形式为三种：动词不定式、动名词和分词。非谓语动词没有人称和数的变化。 动词不定式是一种非谓语动词形式，其结构为“to＋动词原形”，其中to 不是介词，而是动词不定式的符号，称为小品词，动词不定式没有人称和数的变化。动词不定式和其后面的名词等构成不定式短语，在句子中可以用作主语、表语、宾语、补足语、定语、状语等。 一. 作主语例如： To be a doctor is hard. 做医生很难。 To learn English well is not easy. 学好英语不容易。 To say is to believe.眼见为实。 动词不定式（短语）作主语时，为了避免句子的头重脚轻，可以用“it”作形式主语，而把真正的主语－－动词不定式（短语）放在句子的后部。例如上面的句子可以表示为： It is hard to be a doctor. It is not easy to learn English well. 再如： It’s important to plant trees in spring. 如果动词不定式的动作是谁做的，可以在动词不定式前面加一个由介词for引导的短语，称为不定式的复合结构。例： It’s good for us to read English aloud in the morning. 对我们来说每天早晨大声读英语是很有益的。 It is important for students to use English every day. 对学生来说每天使用英语是很重要的。 二. 作表语：（在形式上，位于系动词后的就是表语。从含义上讲，表语是回答主语“是什么”或“怎么样”的语法成分。） 动词不定式（短语）作表语常用于系词be的后面。例： His work is to drive a car. 他的工作是开车。 My job is to feed animals. 我的工作是饲养动物。 Her ambition is to be a doctor. 她的理想是当医生。 三. 作宾语 动词不定式（短语）可以放在一些动词后面用作宾语，能以动词不定式作宾语的动词有：begin, start, want, forget, remember, show, learn, like, hate, love, ask等。例： I want to tell you a story. 我想给你讲个故事。 They begin to work at eight every morning. 他们每天早晨8点开始工作。 Don’t forget to lock the door.别忘了锁门。 Would you like to go and have a picnic with us tomorrow?明天和我们一
动词不定式的精讲与专项练习
动词不定式（The Infinitive） 一、概述 不定式是动词的一种非谓语形式，在句中不能单独作谓语。它有两种形式：（1）带to的不定式；（2）不带to的不定式（即通常所说的动词原形），它可以和助动词或情态动词构成谓语。不定式既有动词性质，又有名词性质。 1）不等式具有动词性质，即它有时态和语态的变化；可有自己的宾语或状语并构成不等式短语。如： Would you like to tell me an interesting story? 你可不可以给我讲一个有趣的故事？（不等式to tell有自己的宾语me和story）He was too clever a man to be fooled.他这个人很机灵，不会被愚弄的。（不等式的被动语态） I’m going to go there by bike. 我想骑自行车去那儿。（不定式有状语there） They will set up more primary schools in the countryside. 他们将在乡村修建更多的小学。（不带to的不等式与助动词will一起构成谓语）但是，不等式没有人称和数的变化，即不受人称和单数、复数的限定或影响。 She likes to play the accordion. 她喜欢弹奏手风琴。 She liked to play the accordion when she was young. 她很小就喜欢弹奏手风琴。 2）不等式具有名词性质，即它在句中可用作主语、宾语、表语等。如： To see is to believe. 百闻不如一见。（作主语） This suit doesn’t seem to fit me.这件衣服似乎不适合我穿。（作表语） She wanted to see which shops offered the best service. 她想看看哪家商店提供最好的服务。（作宾语） There’s no need to be worried. 不需要担心。（作定语） He went there to see what would happen.他去那儿是想看看会出什么事。（作状语） 3）不等式虽然在语法上不能有主语，但它表示的动作，在意思上是可以有自己的主语，在语法上这个主语称为不等式的逻辑主语。这个逻辑主语可能是整个句子的主语、宾语等，也可以用一个由for引起的短语表示。如： His friends tried to encourage him. 他的朋友设法鼓励他。（不等式的逻辑主语His friends同时也是句子的主语） Every year, tobacco companies must persuade new people to start smoking cigarettes. 每年烟草公司要设法使一些比吸烟的人开始吸烟。（不等式的逻辑主语new people是句子的宾语）It’s very difficult for a foreigner to learn Chines e. 外国人学汉语是很不容易的。（不等式的逻辑主语由for引起的短语表示） 另外，不等式的否定形式一般在它的前面直接加not或never。 The teacher has told me many times not to come late again.老师多次告诉我不要再来晚了。 She seems not to have a bright time with her new friends.和新朋友在一起她似乎过得不是太好。 二、不定式的主要用法 动词不等式具有名词、形容词及副词的特征，因此在句中可作主语、宾语、宾语（或主语）补足语、表语、定语、及状语等。 1、不定式作主语 ①不等式作主语时，谓语动词用单数形式。 To conquer English is not easy. 征服英语不容易。 To make plan firs t is a good idea. 先制定计划是个好主意。 To know everything is to know nothing. 事事皆通，无一精通。 ②不等式作主语时，常常用形式主语it替代，而将真正的主语不等式放在句子的后面。 It is necessary to master a foreign language.掌握一门外语很有必要。 It’s a great pleasure to see you again.再次见到你真高兴。 It is a bad manner to stare at a foreign guest.盯着外宾看是一种不良的举动。 ③如果说明不等式表示的动作是谁做的，可以在不等式的前面加一个for引起的短语，这就是常见的“It is adj./n. for sb. to do sth.”句式。如： It is good manners for an Arab to stand close to his friends when they are talking. 对阿拉伯人来说，交谈时站得离朋友近些是好的礼貌。 It is a great honor for us to be presented at the party.我们能来参加晚会，深感荣幸。 It will be a regret for us not to help him. 我们没有帮助他是个遗憾。 ④在某些形容词（如kind, good, nice, wise, unwise, clever, silly, wrong, right, foolish, stupid, careless, considerate, rude, naughty, impolite等）作表语时，不等式前常加一个以of引起的短语，来说明不等式指的是谁的情况。这就是常见的 “It is adj. of sb to do sth.”句式。如：
动词不定式的基本用法
动词不定式的基本用法 一、概述 动词不定式是一种非谓语动词形式，它能起名词、形容词和副词的作用，在句子中作主语、宾语、定语、表语、宾语补足语和状语。其形式如下：（主动形式） ◆一般式（not）to do 一般现在时表示的动词有时与谓语动词表示的动作同时发生，有时发生在谓语动词的动作之后。 He seems to know this. 我希望再见到你。_____________________________________________________ ◆完成式（not）to have done 完成时：表示的动作发生在谓语动词表示的动作之前。 He seems to have caught a cold. 很抱歉给你带来这么多的麻烦。____________________________________________ ◆进行式（not）to be doing 进行时：表示动作正在进行，与谓语动词表示的动作同时发生。 He seems to be eating something. 他假装在学习。_______________________________________________________________ 二、动词不定式的语法功能 （一）作宾语 1) 动词+ 不定式 The driver failed to see the other car in time. 司机没能及时看见另一辆车。 我碰巧知道你那道问题的答案。 ____________________________________________________________________ ★常用的动词有afford, aim, appear, agree, arrange, ask, decide, bother, care, choose, come, dare, demand, desire, determine, expect, hope, fail, happen, help, learn, long（渴望）, mean, manage, offer, ought, plan, prepare, pretend, promise, refuse, seem, tend, wish… 2）动词+疑问词+ to Please show us how to do that. 请演示给我们如何去做。
动词不定式的用法荟萃
动词不定式的用法荟萃 不定式在句子中可做主语、宾语、表语、定语、状语和宾语补语。 1)不定式做主语一般表示具体的某次动作。 【例如】 To complete the 30storied building in one year was quite a difficult task. To do that implies taking responsibility. 当主语较长，谓语较短时，常用it做形式主语，而将不定式放到 谓语的后面。 【例如】 It is important for modern young people to master at least two foreign languages. It做形式主语，不定式放在谓语动词之后常用于下列结构中： a) It is＋形容词(easy, important, difficult, foolish,
inconvenient, unnecessary, right, wrong...)＋( for/of sb.)＋ 不定式 【例如】 It is essential to reserve a table in advance of Christmas Eve. hard to put my hopessintoswords. It is not easy to catch fish with your hands only. It is important for us young people to learn English and master it. b) It is＋名词(a pleasure, a pity, a pleasant thing, one’s du ty, an honor, a shame, a crime, no easy job...) ＋不定式 It is a sheer waste of time to read that kind of trash. It is a pity to have to go without her. It is a glorious death to die for the people.
动词不定式讲解
非谓语动词 一、英语句子需要遵循一个总原则：一个句子只能有一个动词。当一个句子必须要出现两个或两个以上的动词才能完整 表达一个意思时，为了不违法总原则，英语有四种处理方式： 1. 切分成两个或者多个句子 She is a girl. She likes English 2. 将一个谓语动词做主句，其余动词改成从句 She is the girl who likes singing. 3. 添加and, but, or, when, because, not only..but also, either..or 等连词变成并列结构 She got off the bus, but left her handbag on her seat. 4. 将其中一个动词变成非谓语动词形式 She got off the bus, leaving her handbag on her seat. 二、非谓语动词使用条件：一个句子当中，已经存在一个主句（谓语动词），又没有连词(and,but,or等)的情况下， 还有别的动词出现时，这时就要用非谓语动词 三、非谓语除了不能做谓语外，其他成分都可以做 不定式（to do） 四、非谓语动词三种形式分词现在分词（doing） 过去分词( done ) 动名词(doing) 五、非谓语动词解题技巧： 1. 判断是不是用非谓语动词（1.看有没有逗号 2.看有没有谓语 3.看有没有连词。要牢记英语中逗号不能连接两个 句子，一个句子如果没有连词只能有一个谓语） 2. 判断是主语和动词是主动还是被动关系 3. 判断时间, 确定非谓语动词和主句动词谁先发生，谁后发生 不定式的用法 不定式构成一般式完成式进行式 主动关系to do to have done to be doing 被动关系to be done to have been done 不定式动词和谓语动词发生的时间关系不定式的动作和谓语动作同时发生， 或发生谓语动作之后 he seems to know a lot 不定式的动作发生在谓语动 作之前 I regretted to have told you a lie. 不定式的动作和谓语 动作同时发生 I’m glad to be talking with you 不定式否定形式在to前加not. 即not to..... 不定式充当的成分主语，宾语，表语，定语，状语，宾补
高中动词不定式用法讲解及练习
Grammar Presentation---动词不定式 一、不定式的句法功能 ●不定式作主语 ?To learn a foreign language is not easy.学习外语不是一件容易的事。 ◎不定式短语作主语时，常用it作形式主语来代替它的位置，而将真正的主语（不定式短语）移到谓语之后 ?It’s a great honor to be invited to Mary’s birthday party.很荣幸被邀请参加玛丽的生日聚会。 ●不定式作宾语 ◎作动词宾语 ◇下列动词常接不定式作宾语，如：agree, arrange, ask, beg, choose, dare, decide, demand,expect, fail, fear, hope, manage, offer, plan, prepare, pretend, promise, ?They hope to find new resources for mankind.他们希望为人类找到新资源。 ◇如果不定式作宾语且有自己的补语，常用“it”作形式宾语，而把真正的宾语放在后面。 下列动词常用it作形式宾语，如：believe, consider, feel, find, know, make ?I know it impossible to finish so much homework in one day. 我知道在一天中完成这么多的作业是不可能的。 ●不定式作表语 ◎不定式作表语时，一般紧跟在系动词后，说明主语的内容 ?The first step is to check the victim’s breathing. 第一步是检查受害人的呼吸。 ●不定式作补语 ?I’d like the problem to be discussed at the next meeting.我希望这个问题在下一次会上讨论。 ●不定式作定语 ?The students have a lot of homework to do every day.学生们每天都有很多家庭作业要做。 ●不定式作状语 不定式可以作原因状语、结果状语、目的状语以及方式状语 不定式在下列句式中作目的状语：so as to do, in order to do ?In order to ensure your hair looks its best, pay attention to what you eat. 为了保证你的头发是最佳状态，请注意你的饮食。 二：不定式考点归纳： 考点1：不定式的时态和语态： 1.---Is Bob still performing? ---I’m afraid not. He is said ____the stage already as he has become an official. A. to have left B. to leave C. to have been left D. to be left 2.The news reporters hurried to the airport, only ____ the film stars had left. A. to tell B. to be told C. telling D. told 1．A. 根据句子的意思“据说他已经离开了舞台”，要用不定式的完成式的主动形式。2．B. 用动词的不定式的被动形式表示结果状语。 考点2：不定式的功能：不定式具有名词的特征，可以作主语或宾语（例5），具有形容词的特征，可以作表语、定语或补足语（例4）；具有副词的特征，在句子中可以作状语（例3）。
动词不定式用法及练习题-L105
动词不定式用法小结 动词不定式用法小结 动词不定式是一种非谓语动词形式，其结构为“to＋动词原形”，其中to不是介词，而是动词不定式的符号，称为小品词，动词不定式没有人称和数的变化。动词不定式和其后面的名词等构成不定式短语，在句子中可以用作主语、表语、宾语、补足语、定语、状语等。 一. 作主语例如： To be a doctor is hard. 做医生很难。 To learn English well is not easy.学好英语不容易。 动词不定式（短语）作主语时，为了避免句子的头重脚轻，可以用“it”作形式主语，而把真正的主语－－动词不定式（短语）放在句子的后部。例如上面的句子可以表示为： It is hard to be a doctor. It is not easy to learn English well. 再如： It’s important to plant trees in spring. 如果动词不定式的动作是谁做的，可以在动词不定式前面加一个由介词for引导的短语，称为不定式的复合结构。例： It’s g ood for us to read English aloud in the morning. 对我们来说每天早晨大声读英语是很有益的。 It is important for students to use English every day. 对学生来说每天使用英语是很重要的。 二. 作表语： 动词不定式（短语）作表语常用于系词be的后面。例： His work is to drive a car.他的工作是开车。 My job is to feed animals.我的工作是饲养动物。 Her ambition is to be a doctor.她的理想是当医生。 三. 作宾语 动词不定式（短语）可以放在一些动词后面用作宾语，能以动词不定式作宾语的动词有：begin,start,
非谓语动词之动词不定式(todo)的用法
非谓语动词之动词不定式（to do）的用法 非谓语动词是指在句子中不是谓语的动词，主要形式有：不定式、动名词和分词（现在分词和过去分词）。 “to do”动词不定式的变形 动词不定式的用法 充当主语（一般会用it 当形式主语） To swim here is dangerous. = It is dangerous to swim here. To pass this English exam is unlikely. = 充当表语（多数情况下，可以转换成动词不定式做主语） My job is to help with your English learning. To help with your English learning is my job. 充当宾语（只能做某些动词的宾语，一般不做介词的宾语；有时用“it”做形式宾语） I decided to attend this meeting last night. I find it necessary to learn a foreign language. 注意：当以下动词欲接动词作宾语时，只能跟不定式作宾语。 decide, determine, learn, wish, hope agree, plan, pretend, dare, refuse, fail prepare, try, manage, help, promise offer, beg, demand, afford, arrange, be supposed
充当宾语补足语 I persuaded him to make a speech in public. 注意：在感官动词／使役动词／help后（see, hear, watch, notice, make, have, let后不定式做宾补时，可省略“to”） I saw them have a disagreement on who should sweep the floor. （我看到了他们争论的整个过程） 但，感官动词后面也可接Ving形式，表示正在进行。 I saw them arguing about who should sweep the floor. （我看到他们正在争论谁该扫地，并不一定看到了整个过程） 充当状语（目的，原因，结果状语，其逻辑主语与句子主语一致） I wrote him a letter to further explain this matter. （目的状语） I’m sorry to bother you.（原因状语） He queued for hours at the box office only to find that the show was sold out. （结果状语，only + to find/realize/discover表示出乎意料的结果） 充当定语（不定式作定语，要放在所修饰的词的后面） I have a lot of dishes to wash. Do you have anything to say There are 3 questions to answer. 一些固定句型中不定式省略“to” had better would rather do… than do… why not do “except/but” 有“do” 无“to”，有”to”无“do” have nothing to do but do… do everything but/except have no choice but to want nothing but/except to 当两个或多个作用相同的不定式并列（and/or/than）时，通常只保留第一个不定式的“to”. He told me to stay there and wait for him. It’s easier to persuade people than force them. To try and fail is better than not to try at all. （否定式中“to”不能省略）
动词不定式练习题及讲解说课讲解
动词不定式练习题及 讲解
动词不定式用法要点讲解 一、作主语 动词不定式作主语时，句子的谓语动词常用单数，其位置有以下两种： (1)把不定式置于句首。如： To get there by bike will take us half an hour. (2)用it作形式主语，把真正的主语不定式置于句后，常用于下列句式中。如： ①It＋be＋名词＋to do It's our duty to take good care of the old. ②It takes sb+some time+to do How long did it take you to finish the work? ③It＋be＋形容词＋for sb＋to do It is difficult for us to finish writing the composition a quarter of an hour. ④It＋be＋形容词＋of sb＋to do It is stupid of you to write down everything the teacher says. ⑤It seems(appears)＋形容词＋to do It seemed impossible to save money. 二、作宾语 ⒈不定式作宾语 ①以下动词后，只能跟不定式作宾语。如： agree,ask,aim,arrange,choose,decide,demand,expect,fail ,help,hope,lean,long manage,offer,plan,prepare,pretend,promise,refuse,wish等，这些词大部分可接 th at引导的从句。如： When our visit to the farm was over, we expected to start back on foot. When our visit to the farm was over, we expected that we would start back on foot. ②当复合宾语中的宾语是不定式时，先用形式宾语it代替不定式，把不定式置于补语之后，即：主语＋动词＋it＋补语＋to do句式。 He feels it his duty to help the poor. ③介词but,except,besides+to do(do) 在这种句型中，如介词前有动词do，后面应接不带to的不定式；如无do，则接to 不定式，即带do不带to，带to不带do。如： The enemy soldiers had no choice but to give in. ⒉部分动词后面，既可接动词不定式，也可接动名词作宾语，意义不变。如：begin,continue,start,hate,like,love,need,require,want等。 在need,require,want后接-ing形式，表示被动意义，也可接不定式，但要用被动形式，如：Your handwriting needs improving(tobe improved). hate,love,like接不定式表示特定的未来事件，接动名词表示目前正在进行的活动或一般的行为。 在下列情况下，一般要用不定式： ①hate,like,love前有would(should)时，如：I'd like to have a cup of coffee. ②当谓语动词begin,continue,start等是进行式时，如：Thestudents are starting to work on the difficult maths problem. ③begin,continue,start与know,understand等状态动词连用时，如：I soon began to understand what was happening. 3．advise,allow,encourage,forbid,permit等动词后接动名词作宾语，或带不定式作宾语补足语。如： Our teachers don't permit our/us swimming in the lake. Our teachers don't permit us to swim in the lake. 4．部分动词后接不定式或动名词时，意义差别较大，应根据句子语境选择使用。 ①forget,remember,regret后接不定式，表示现在或未来的动作，接动名词表示动作已经发生。如： We regret to tell you that all of you are not invited to attend the meeting. They regretted ordering these books from abroad. ②mean to do 打算做某事 ;mean doing 意味着…… ③try to do 设法尽力做某事; try doing 试着做某事 ④stop to do 停下一件事去做另一件事（不定式作目的状语）; stop doing 停止做某事 ⑤can't help doing 禁不住…; can’t to do不能帮助干…… ⑥go on to do 做不同的事或不同内容的事; doing 继续不停地做某事，指同一动作的继续 ⑦leave off to do 离开某地去干什么（目的状语）; leave doing停下某事 三、做表语 To be kind to the enemy is to be cruel to the people. 四、作定语 不定式在句中作定语，置于被修饰的名词或代词之后。如： Have you anything to be taken to your sister? 收集于网络，如有侵权请联系管理员删除
(完整版)动词不定式的用法总结
动词不定式的用法总结 动词不定式在中学英语中应用非常广泛，一方面在句中可起名词、形容词或副词的作用，同时也可在句中作主语、宾语、定语、状语和宾语补足语。接下来为大家提供了以下：动词不定式的用法总结一 动词不定式的形式一般是to +动词原形，但to有时要省去。 而动词不定式在具体运用时用不用to，取决于谓语动词的用法。 现就以下几方面介绍如下。 一、不定式结构 1. 带to的不定式结构 能直接跟带to的不定式结构的动词主要有：want, ask, tell, hope, learn, try, decide, forget, remember, like, love, stop, go, come等。 如： I want to go to the movies with you. 我想跟你一起去看电影。 Don’t forget to turn off the light before you leave. 在你离开之前别忘了关灯。 注意：动词不定式的否定形式是在不定式前直接加not，即not to do sth.。
如： Dave told me not to wake up Kate. 大卫告诉我别叫醒凯特。 2. 不带to的不定式结构 以下几种情况使用不带to的动词不定式： (1)在固定词组had better之后。 注意：had better的否定形式是had better not do sth.。 如： You had better go home now. 你最好现在回家。 It’s cold outside. You’d better not go out. 外面很冷，你最好不要出去。 (2)在let, make, see, feel, watch, hear等感官或使役动词后，要跟不带to的动词不定式作宾语补足语。 如： I made them give me the money back. 我迫使他们把钱还给我。 I didn’t see you come in. 我没看见你进来。 (3)在引导疑问句的why not之后。 Why not+不带to的不定式是Why don’t you do的省
动词不定式(基础讲解)
动词不定式 【概念引入】 1. 动词不定式名言： （1）动词不定式作表语 To lose is to learn. 失败就是学习。 （2）动词不定式作主语 It is better to give than to take. 给予比接受更好。 （3）不定式作宾语 Expect to be treated as you have treated others. 你怎样待别人，就指望别人怎样待你。 （4）不定式作宾补 Adversity causes some men to break，others to break records. 逆境使一些人崩溃，也使一些人破记录。 （5）不定式作定语 There is a time to talk and a time to act. 该说的时候说，该做的时候做。 （6）不定式作目的状语 To find the exact answer，one must first ask the exact question. 要找到确切的答案，首先必须提出确切的问题。 2. 动词不定式定义： 动词不定式是一种非谓语形式（不能作谓语），基本形式是to do形式(to是不定式符号的标志，无意义，可以不翻译) 肯定式：to + 动词原形 否定式：not to + 动词原形 【用法讲解】 1.动词不定式的特征 动词不定动式是一种非谓语动词形式，它没有人称和数的变化，在句子中不能作谓语，但可以作除谓语之外的其它任何句子成分（主语、表语、宾语、宾语补足语、定语和状语）；动词不定式具有名词、形容词和副词的特征，同时还保持动词的某些特点，既可以有自己的宾语和状语，动词不定式和它的宾语和状语构成不定式短语。 2. 动词不定式在句子中的作用 动词不定式是由to+动词原形构成，在句中起名词，形容词和副词的作用，可以担任除谓语以外的其它任何成分。 （1）动词不定式作主语。例如： To master a language is not an easy thing. 掌握一门语言不是一件容易的事情。 To teach English is my favorite. 教英语是我的爱好。 It's my pleasure to help you. 很乐意帮助你。 （2）动词不定式作宾语。 某些及物动词可以用动词不定式作宾语，这些动词有decide, begin, help, want, wish, like, forget, learn, ask等。例如： I like to help others if I can. 如果有可能的话，我喜欢帮助别人。 I want to buy a new car when I have enough money. 我有钱时想买一辆新车。