一.不定式做宾语:
1. it作形式宾语:find(think,keep,make...)+it+adj.+(for sb) + to do sth.
动词不定式作宾语且过长时常用it作形式宾语，而让真正的宾语——不定式断后。例如：The man downstairs found it hard to fall asleep.
2.不定式直接做动词宾
语:want(forget,remember,like,love,hate,continue,begin,start,hope,wish....)+ to do sth.
I forgot to turn off the lights last night.
二:不定式做主语:
1.It 做形式主语,不定式做真正的主语:
1) It is(was) + adj. +(for sb)+to do sth.
It's very dangerous for children to play with fire.
2) It takes(took,will take) sb some time +to do sth.
It will take me three days to finish reading the book.
2.不定式直接做主语:To play football in the street is very dangerous for children.
三.不定式做表语:My duty is to look after the kids well.
四.不定式做定语:
作定语时，不定式（短语）常置于被修饰的名词、不定代词等之后。例如：
I have lots of things to do today.
Would you like to give me something to eat?
[提示]如果不定式（短语）是不及物动词，其后应有必要的介词/副词。例如：
I found a nice place for him to live in.
Please give me some paper (pens) to write on(with).
五.不定式做状语:
1.不定式（短语）常跟在come，go，run，hurry 等动词后作目的状语；或以“in order to +动词原形”、“so as to +动词原形”等形式出现，或回答what . . . for？/ why . . . ？问句。例如：
-Hi，Peter！Why are you in such a hurry？
-To catch the 7：30 train.
[提示] 有时目的状语可置于句首，意为“为了……”，相当于in order to.例如：
To catch the bus，you must get up early.
在stop后的动词不定式其实是作目的状语，意为“停下来做另一件事”。例如：
Let’s stop to have a me al. I know a good restaurant near here.
2.作结果状语的不定式常以“enough to . . . ，only to . . . ，too . . . to . . . ”等形式出场，并能简化成so . . . that . . . 句式。例如：
Liu Mei was so lucky that she received many books from Project Hope.
Liu Mei was lucky enough to receive many books from Project Hope.
六.不定式做宾语补足语:
1.用做make,let,have等使役动词的宾语补足语,省去不定式符号to. make(let/have) sb do sth.
Don't let her go there alone.
2.用做see,look at,listen to, hear,watch,notice等感官动词的宾语补足语,亦省去不定式符号to.
I often hear a girl play the violin in the evening.
3.用做want,like,tell,ask,order,wish ....的宾语补足语时,不能省去不定式符号to.
The teachers often tell us to study hard at school.
七.其它用法:
1. 小品词to 的回避与复出
许多动词如teach，ask （要；让），tell，beg 等后常有带to的动词不定式作宾补；但let，have，make （让；使），feel，hear 等后作宾补的不定式结构，to 要回避。但在被动语态里to须“重出江湖”；help 后作宾补的不定式可加to，也可省略to.例如：The policeman made the young woman move her car.
The young woman was made to move her car by the policeman.
[提示] 对不定式进行否定可在其前加not.如：let sb not do sth；tell sb not to do sth. 把直接引语为祈使句的句子变为间接引语，直接引语一般转换成不定式作宾补。例如：The policeman said. “Don’t play football in the street，children！”
The policeman asked the children not to play football in the street.
2. 不定式be to do sth可表将来
be to do sth 表将来，意为“将要做某事”。例如：
Our train is to leave at eight.
3. 用在know,choose,decide等动词后“疑问词+不定式”
“疑问词+不定式”结构中的疑问词包括疑问代词which，who （m），what 和疑问副词how，when，where 等，并常简化相应的从句，但当主句与从句的主语不一致时，
不定式常用被动形式。例如：
I can't decide which one to buy.
The little girl wanted to know when to be taken to Pairs by her father.
动词不定式是初中英语的语法重点之一，也是每年中考英语试题的考点之一。它是动词的一种非谓语形式，没有人称和数的变化，不能单独作句子的谓语。其构成形式为＂to+动词原形＂，to为动词不定式的符号，本身无意义。动词不定式具有两大特点：
1.具有动词的特点，因此，后面可以跟表语、宾语或状语，构成动词不定式短语。
2.具有名词、形容词或副词的特点，可以在句子中用作主语、宾语、宾语补足语、状语、定语、表语及同位语等。下面对不定式的难点以及它在中考英语中的考查点，作简要的总结和分析，供同学们学习时参考。
一、动词不定式作主语
1. It's our duty _________ the room every day.
A. to clean
B. cleaned
C. clean
D. cleans (甘肃省)
2. It's hard for us _________ English well.
A. learn
B. learns
C. to learn
D. learning(江西省)
3.建造这座立交桥将花费工人们一年多的时间。
It will _________ the workers over a year _________ _________ the fly over.(北京市海淀区)
4. It's very nice _________ you to get me two tickets _________ the W orld Cup.
A. for，of
B. of，for
C. to，for
D. of，to(安徽省)
Keys：1. A 2. C 3. take，to，build 4. B
［简析］动词不定式作主语时，可以直接放在谓语动词前面的主语位置，也可以用先行词it作形式主语，而将真正的主语(不定式)置于后面。常见的句式有：
(1)It is +形容词(of sb)to do sth.(2)It is +名词(for sb)to do sth.(3)It takes s
b some time to do sth.(4)It is +形容词(for sb)to do sth.句式(1)中常用ni
c e，kind，clever，good，right，wrong，foolish，careless等形容词，与介词of搭配，这些形容词常表述不定式逻辑主语的属性或性质；句式(4)中常用hard，difficult，easy，important等形容词，与介词for搭配，表示不定式表示的动作、行为的性质。
二、动词不定式作宾语
1. He wants ______ some vegetables.
A. buy
B. buying
C. to buy
D. buys (山西省)
2. Don't forget ______ your homework with you when you come to scho ol.
A. to bring
B. bringing
C. to take
D. taking (福建省)
3. He found it very difficult ______.
A. sleeping
B. sleeps
C. slept
D. to fall asleep (湖南省)
Keys：1. C 2. A 3. D
［简析］在want，like，agree，hope，wish，learn，begin，start，s eem，decide，hate，choose，forget，remember等动词后面，可以接不定式作宾语。如果其后接形容词补足语时，则可以用it作形式宾语，而把作真正宾语的不定式放到后面。
三、动词不定式作宾语补足语
1. Robert often asks us ______ his Chinese, so his Chinese is much be tter than before.
A. help him
B. to help him with
C. to help with
D. helps him with (江苏省)
2. Mr Li often teaches his Japanese friends ______ Chinese food.
A. cook
B. cooks
C. to cook
D. cooked (甘肃省)
Key：1. B 2. C
［简析］不定式可以用作宾语补足语。后面可以接不定式作宾语补足语的动词有：ask，teach，expect，tell，allow等。
四、动词不定式作状语
1. She went ______ her teacher.
A. to see
B. looks
C. saw
D. seeing (江西省)
2. Meimei likes English very much. She does her best ______ English w ell.
A. learn
B. learning
C. to learn
D. learns (四川省)
Key：1. A 2. C
［简析］go，come，try，do / try one's best等动词或短语动词作谓语时，其后常常可以接不定式作目的状语。
3. I'm sorry ______ that.
A. hears
B. hearing
C. hear
D. to hear (河北省)
4. I'm sorry ______ you.
A. trouble
B. to trouble
C. troubling
D. troubled (吉林省)
5. My mother was very glad ______ her old friend.
A. to meet
B. meet
C. met
D. meets (甘肃省)
Keys：3. D 4. B 5. A
［简析］＂be +形容词+ to do sth＂结构中的不定式作状语，常表示原因或方式。
6. The panda is so fat that it can't go through the hole.(改为意思相同的
句子)
The hole ______ ______ ______ ______ such a fat panda to go throug
h. (广东省)
7. The ice on the lake was so thin that people couldn't skate on it. (改
为意思相同的句子)
The ice on the lake wasn't ______ enough ______ people ______ ____ __ ______. (广东省)
Keys：6. is，too，small，for 7. thick，for，to，skate，on
［简析］在上述＂too +形容词/副词(for sb)to do…＂(太……而不能……)和＂e nough (for sb) to do…＂(足以、足够……做……)结构中，不定式作结果状语。
五、动词不定式作定语
1. Would you like something ______?
A. drink
B. drinking
C. to drink
D. drinks (湖北省)
2. I have a lot of homework ______.
A. do
B. doing
C. did
D. to do (河南省)
3. He is not an easy man ______.
A. get on
B. to get on
C. get on with
D. to get on with (山东省)
Key：1. C 2. D 3. D
［简析］不定式作定语时，常放在被修饰的词语之后，与被修饰的词语为逻辑上的主谓关系或动宾关系；如果不定式的动词是不及物动词，其后要加上必要的介词或副词，构成的短语动词相当于及物动词。
六、不带to的动词不定式
1. We saw him ______ the building and go upstairs.
A. to enter
B. enter
C. entering
D. entered (河南省)
2. So much work usually makes them ______ very tired.
A. to feel
B. feels
C. feeling
D. feel (吉林省)
3. Your father is sleeping. You'd better ______.
A. not wake up him
B. not to wake up him
C. not wake him up
D. not to wake him up (陕西省)
4. I was made ______ my homework in the afternoon.
A. do
B. doing
C. to do
D. did (贵州省)
Key：1. B 2. D 3. C 4. C
［简析］1.在see，watch，hear，feel等感官动词和make，have，let等使役动词后面作宾语补足语的不定式不带to.但是在被动语态中，作主语补足语的不定式要带to(let没有被动语态)。2.在＂had better＂后面接不带to的不定式。
七、动词不定式的否定形式
1. Mr Black asked the man ________ the queue.
A. not to jump
B. to not jump
C. didn't jump
D. not jump (广西壮族自治区)
2. The old man told the child ______ noisy.
A. not be
B. not to be
C. to not be
D. be not (湖北省)
3. There is going to ______ an important meeting tomorrow. Please try
______ late.
A. have，not to be
B. have，not be
C. be，not to be
D. be，not be (内蒙古自治区)
Key：1. A 2. B 3. C
［简析］动词不定式的否定形式通常是在不定式符号to的前面加上not，如果是不带to的不定式就直接在动词原形前面加上not.
八、某些动词后面接不定式和接动词-ing形式的区别
1. Please stop ______ a rest if you feel tired.
A. to have
B. having
C. have
D. has (广西壮族自治区)
2. ——Why didn't you buy some bread on your way home? ——Sorry, I forgot ______ some money with me.
A. take
B. taking
C. to take
D. took (湖北省)
3. ——Let's have a rest, shall we?
——Not now, I can't stop ______ the letters.
A. write
B. to write
C. writing
D. and write (湖北省)
4. Jim was badly hurt, so he had to stop ______ (walk). (用所给单词的正确形式填空)(四川省)
Key：1. A 2. C 3. C 4. walking
［简析］一些常见的动词后面接不定式和接动词的-ing形式的区别如下：＂stop to do sth＂意为＂停止正在做的事情去做另外一件事＂，＂stop doing sth＂意为＂停止正在做的事＂：＂remember to do sth＂意为＂记住去做某事＂(事还未做)，＂remember doing sth＂意为＂记得做过某事＂(事已做)：＂go on t o do sth＂意为＂接着做某事＂(做完一事，接着做另一事)，＂go on doing st h＂意为＂继续做某事＂(一事未做完接着往下做)：＂forget to do sth＂意为＂忘了做某事＂(事还未做)，＂forget doing sth＂意为＂忘了曾做过某事＂(事已做)。
5. When I was walking in the street I saw a plane ______ over my hea
d.
A. flies
B. flying
C. flew
D. to fly (福建省)
6. A woman saw it ______ when she was walking past.
A. happen
B. happens
C. happening
D. to happen (黑龙江省)
Key：5. B 6. A
［简析］在see，hear，watch，feel等感官动词后面可接不带to的不定式，也可接动词的-ing形式作宾语补足语，用不定式表示动作的全过程(动作已结束)，用动词的-ing形式表示动作正在进行(动作尚未结束)。
九、动词不定式的省略及其符号to的保留
1. Would you like to go to the cinema with us?
Yes, ______. What time are we going to meet?
A. I would
B. I would like
C. I like to
D. I'd like to (浙江省)
2. Would you like to go for a picnic with us?
______. What time are we going to meet?
A. No, I can't
B. Yes, I'm glad
C. Yes, I'd love to
D. I'd like (大连市) Keys：1. D 2. C
［简析］在口语中，动词不定式中的动词或短语动词在上下文中重复出现时，第二个动词不定式可以省略，但是to不可省略。这种用法常见于＂be glad to＂，＂would like (love) to＂，＂have to＂等结构中。
十、动词不定式的被动式和其他形式
The new hospital ______ is near the factory.
A. build
B. builds
C. to build
D. to be built (青海省)
Key：D
［简析］当不定式的逻辑主语是不定式所表示的动作的承受者(宾语)时，用动词不定式的被动式，即：to be +过去分词；如果不定式所表示的动作发生在谓语动词表示的动作之前，不定式用完成式，即：to have +过去分词；如果不定式
表示的动作和谓语动词表示的动作同时发生，用不定式的进行式，即：to be +现在分词
1. Don't forget _________ the letter.
A. to send
B. send
C. sending
D. being sent
2. 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. I'm afraid they would not allow him ________ here.
A. to smoke
B. smoking
C. smokes
D. smoke
5. 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. bought
7. John was made _______ the car for a week as a punishment.
A. to wash
B. washing
C. wash
D. to be washing
8. The sitting-room needs _______, but it'll have to wait until Saturday.
A. be cleaning
B. to be cleaned
C. clean
D. being cleaned
9. The first thing I want to do is __________.
A. visit to him
B. to visit him
C. visiting him
D. visited him
10. Li Yang advised me _________ too much, otherwise I would have been drunk.
A. not to drink
B. to drink
C. not drinking
D. drinking
参考答案
1. A. forget to do sth . 忘记去做某事。forget doing sth . 忘记做过某事。
2. B. sit on the chair, 其中on不能少。
3. C. it为形式主语。
4. A. allow sb to do
5. D. tell sb, to do
6. B. stop to do 停下去做另一件事。stop doing 停止做某事。
7. A. make sb do 在被动语态中为be made to do .
8. B. need to be done与need doing皆为“需要被做”之意。
9. B. 不定式结构作表语。
10. A. 不定式的否定式：advise sb not to do
高中英语动词不定式用法大全(名师总结必考语法知识点，值得下载) 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 pla nt 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
中考英语动词不定式考点全攻略 动词不定式历来是中考英语命题的热点之一。它是动词的一种非谓语形式，没有人称和数的变化，不能单独作句子的谓语。其构成形式为"（not）to+动词原形"。 考点攻略一：动词不定式作主语 1）动词不定式直接用在主语位置：To see you is always a pleasure. 2）如果主语较长，则可以用it作形式主语，而将真正的主语(不定式)置于后面。 ①It is +形容词+(of sb.) to do sth. 此处常用careless, clever, foolish, honest, kind, nice, rude, stupid, silly, wrong, wise等形容词，与介词of搭配，这些形容词常表述不定式逻辑主语的属性或性质。 It’s brave of you to jump into the river to save the boy! ②It is +名词或形容词+ (for sb.)to do sth. 此处常用necessary, hard, difficult, easy, important, impossible等形容词，与介词for搭配，表示不定式的动作或行为的性质。 It is our duty to keep our classroom clean. It is important for us to protect the environment. ③It takes sb. some time to do sth. It usually takes us about two and a half hours to travel from Shanghai to Japan. 考点攻略二：动词不定式作宾语 其后常接不定式作宾语的动词有：agree, afford, choose, decide, expect, plan, promise, manage, hope, wish, want, seem, refuse, fail等。 I didn’t expect to see you here. 在某些复合宾语中，动词有find, consider, think, make, feel,常先用it代替不定式，作形式宾语，而把不定式放到后面去。 I find it impossible to finish the task on time. 考点攻略三：动词不定式作宾语补足语 动词不定式作宾补，即“动词+宾语+（not）to do sth.”，接不定式作宾补的常见动词有：advise, allow, ask, cause, expect, beg, encourage, get, help, invite, teach, order, remind, tell, want, wish, warn等。 My parents always tell me not to be late for school. 考点攻略四：动词不定式作表语 不定式作表语一般位于系动词之后，表示具体动作，特别是表示将来的动作；若主语是aim, duty, hope, idea, job, plan, problem, purpose, wish等名词，不定式作表语是对主语起补充说明作用。 It is said that they are to visit China next month. My wish is to become a scientist like Einstein. 考点攻略五：动词不定式作定语（常用于名词之后）。 由only, last, next,序数词或形容词最高级修饰的名词常用不定式做定语， Tom is always the first student to arrive at school. 注：动词不定式to后所接动词若是不及物动词，而不定式与其修饰的词之间有动宾关系时，此不定式后要加相应的介词。 We haven’t decided which hotel to stay at. I need a pen to write with. 考点攻略六：动词不定式作目的状语。如： To keep fit, students are advised to do morning exercises. so as to (不可用于句首使用)，in order to也可以引导目的状语。
动词不定式用法及练习 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。 构成：to do .否定式not to do 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 learn from your friends is important.=It is important to learn from your friends . To leave without saying goodbye is impolite.= It is impolite to leave without saying goodbye. To chat with Miss White is a pleasant thing.=It is a pleasant thing to chat with Miss White. To walk to school takes me ten minutes.=It takes me ten minutes to walk to school. 句型总结 It is + adj. + of sb. to do…= sb. is\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 him to speak to old people like that. It is + adj. + for sb. to do…≠ sb. is\are +adj. +to do…如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 necessary for us to study hard. It is easy for him to speak English. 2、作句子的表语：不定式放在be 动词后面，用作表语如： Her dream is to be a policeman. My job is to help the patient. Your task is to clean the classroom. My dream is to own a robot. The doctor’s suggestion is to take more exercise. The best way is to talk to your parents. His plan is to travel to Beijing this summer. My purpose is to help you solve this problem. 3、作句子的宾语：不定式放在及物动词后，用作宾语。能跟不定式作宾语的动词（及物）很多，常见的有want, like, hate, wish, hope, prefer, try, ask, start, begin, decide, learn, choose, agree, expect, remember, forget, plan, decide, would like, need, choose, agree, promise, refuse, set out, manage, pretend, I want to go home. The workers demanded to get better pay. They began to read and write. She forgot to close the door. He wanted to borrow my CD player. I hope to speak English well. The workers demanded to get better pay. I hope to hear from you soon. John doesn’t want to be the host of the charity show. They are trying to solve the problem by himself. Millions of people have learned to use computers.
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
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 动词不定式没有人称和数的变化，在句中不能独立作谓语。但动词不定式具有名词、形容词和副词特征，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。另外，动词不定式具有动词特点，可以有自己的宾语和状语，组成动词不定式短语。动词不定式的肯定形式是to＋do；其否定形式是not to＋do。 下面以动词不定式在句中的作用来予以详细说明。 1．作主语 可以直接作主语。如：To see is to believe． 但在英语中，常用it作形式主语，真正的主语即动词不定式放在后面。如： It's wrong to play tricks on other people． It's our duty to keep our environment clean and tidy． 点击规律：动词不定式在句中作主语时，常放在It is ＋adj +(for sb.)＋(not)to do sth句型中，表示说话人对客观事件的决断，意为：做…..是……的，it仅作形式主语，真正的主语是to do sth It is very interesting to read.读书是有趣的 It is useful to read.看书是有用的 It is healthy to run every day.每天跑步是健康的 It is a little difficulty for me to work out this question.解出这道题对我来说有点难 It is bad not to finish homework.不完成作业是糟糕的 It is bad to be late for school.迟到是糟糕的 It is+adj+of sb +(not)to do sth该句型通常表示说话人对客观事件的惊讶、兴奋、懊悔、难过等感叹情绪，与It is ＋adj +(for sb.)＋(not)to do sth的意义不同。 It is very kind of you to tell me the truth．你能告诉我事实，真是太好了 It is stupid of him to do such a silly thing．他做那件傻事，真是太笨了 It is very clever of you to work out this question. 你能解出这道题目，真是太聪明了 It is very wise of you to read this novel. 你看这本小说，真是太明智了 这个句型中用介词of而不是for的原因是这里的形容词是用来形容人的品质性格的。 类似的词有：careless，careful，clever，considerate，foolish，good，impolite，kind，naughty，nice，silly，stupid，friendly 因此区分是用It is ＋adj +(for sb.)＋(not)to do sth还是It is+adj+of sb +(not)to do sth，要
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。
初中动词不定式练习题（一） 姓名：_______________ （）1.It’s our duty ________ the room every day. A.to clean B.cleaned C.clean D.cleans ( ) 2.It’s hard for us __________ English well. A.learn B.learns C.to learn D.learning ( ) 3.It’s very nice __________ you to get me two tickets. A.for B.of C.to D.in ( ) 4.He wants _________ some vegetables. A.buy B.buying C.to buy D.buys ( ) 5.Don’t forget __________ your homework with you when you come to school. A.to bring B.brining C.to take D.taking ( ) 6.Mr.Li often teaches his Japanese friends _______ Chinese food. A.cook B.cooks C.to cook D.cooked ( ) 7.She went _________ her teacher. A.to see B.looks C.saw D.seeing ( ) 8.I’m sorry _________ that. A.hears B.hearing C.hear D.to hear ( ) 9.My mother was very glad ___________ her old friend. A.to meet B.meet C.meets D.met ( ) 10.Would you like something __________？ A.drink B.drinking C.to drink D.drinks ( ) 11.I have a lot of homework___________. A.do B.doing C.did D.to do ( ) 12.So much work usually makes them _________ very tired. A.to feel B.feels C.feeling D.feel ( ) 13.Your father is sleeping.You’d better __________. A.not wake up him B.not to wake up him C.not wake him up D.not to wake him up. ( ) 14.I was made _________ my homework in the afternoon. A.do B.doing C.to do D.did ( ) 15. Mr Black asked the man _________ the queue. A.not to jump B.to not jump C.didn’t jump D.not jump ( )16. Please stop _________ a rest if you feel tired. A. to have B.having C.have D.has ( ) 17.Jim was badly hurt,so he had to stop _________(walk). A.walk B.walking C.to walk D.walks ( ) 18. The teacher told them ________ make so much noise. A. don’t B. not C. will not D. not to ( ) 19. Tell him _______ the window. A. to shut not B. not to shut C. to not shut D. not shut ( ) 20. The patient was warned _______ oily food(油腻的食物) after the operation. A. to eat not B. eating not C. not to eat D. not eating （）21. The workers want us ________ together with them. A. work B. working C. to work D. worked （）22. I saw him _______ out of the room. A. go B. had gone C. to has gone D. goes
初中不定式todo的用法
1. 不定式的用法------1.1 不定式作主语 不定式作主语，往往用it作形式主语，真正的主语不定式放至句子的后面。 例如：It's so nice to hear your voice. 听到你的声音真高兴。 It's necessary for you to lock the car when you do not use it. 不用车的时候，锁车是有必要的。 It's very kind of you to help us. 他帮助我们，他真好。 It seemed selfish of him not to give them anything. 他不给他们任何东西，这显得太自私了。 但是，用不定式作主语的句子中还有一个不定式作表语时，不能用It is… to…的句型。另外，这样的句子，不能用动名词作表语。例如： （对）To teach is to learn. （错）It is to learn to teach. （错）To teach is learning. （错）Teaching is to learn. 典型例题 The chair looks rather hard, but in fact it is very comfortable to ___. A. sit B. sit on C. be seat D. be sat on 答案：B. 如果不定式为不及物动词，其后应有必要的介词。当动词与介词连用时，常位于"形容词+动词不定式"结构的末尾。 1.1.1 不定式做主语It's for sb/It's of sb to do sth 这样的句子中，由于表语形容词性质的不同，导致了不定式逻辑主语标志用for或of 的区别。 1）for sb.句型中的形容词一般为表示事物的特征特点，表示客观形式的形容词，如easy, hard, difficult, interesting, impossible等：例如： It's very hard for him to study two languages. 对他来说学两门外语是很难的。
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,
动词不定式 动词不定式 知识精讲 非谓语动词指的是在句中不能单独作谓语，但保留动词的某些特征（如有自己的宾语或状语等）的动词形式。非谓语包括动词不定式、现在分词、过去分词和动名词。非谓语动词没有人称和数的变化，但要遵循基本的时态语态规则，在句中充当各种成分。 一、动词不定式基本构成 have等）的后面，做宾补时，通常会省略to，如： The boss made me work ten hours a day. =I was made to work ten hours a day by the boss. 这个老板让我一天工作十个小时。 二、动词不定式的语法功能 动词不定式在句子中可充当主语、表语、宾语、宾补、定语和状语（即除谓语之外的各种成分）。 1. 不定式作主语 1). 动词不定式短语作句子主语时，视为单数，谓语动词用第三人称单数，如： To make work more efficient is our goal. 让工作更有效率是我们的目标。
2). 不定式短语作主语时，为了考虑句子的平衡，常用it作形式主语，而将真正的不定式主语放在句子后面，结构为：It+is/ was+adj. (+for sb.)+动词不定式，如上一句话也可写成： It’s our goal to make work efficient. 我们的目标是让工作更有效率。 It’s very important for us to learn English well. 学好英语对于我们来说很重要。 2. 动词不定式作宾语 1). 动词不定式跟在及物动词后作宾语，这种形式非常常见，就是我们平时积累的一些动词后面跟to do形式，如： I have decided to study hard. 我已经决定要刻苦学习。 常见的这类动词有：begin, choose, continue, decide, expect, fail, forget, hate, help, hope, learn, manage, mean, need, offer, plan, prefer, pretend, promise, refuse, try, want, wish, determine, afford, agree, start, like等。 2). 在find，think后跟不定式时，常用it代替，而将真正宾语，即不定式放在后面，如： I find it not easy to achieve one’s goal. 我发现实现一个人的目标并不容易。 3). 有些不定式结构中的to会省略，直接跟动词原形，这样的结构有：Why not do…, Why don’t you do…, had better (not) do…, would rather do…等，如： I would rather stay at home. 我宁愿待在家里。 3. 不定式作宾语补足语 1). 不定式宾补很常见，结构为：动词+sb. to do sth, 这样的动词有：tell, ask, want, allow, get, would like, encourage等，如： The teacher advised us to have a rest first. 老师建议我们先休息一下。 2). see, hear, watch, notice, have, make, let等动词后作宾补的动词不定式不带to，但变为被动语态以后（即不定式作主补时）要带to，如： My mom made me clean the house. =I was made to clean the house by my mom. 我妈妈让我把房间打扫干净。 注意：help（帮助）后作宾补的动词不定式可带to，也可不带to，即help sb.(to)do sth.，如： He often helps his parents (to) do their housework. 他经常帮助他父母做家务。 4. 不定式作定语 不定式有时起形容词作用，修饰名词，代词，在句中作定语。不定式作定语位于所修饰的名词，代词之后，如： Who was the first one to get to the top of the hill yesterday?
中考英语试题中的“动词不定式”考点透视 动词不定式是一种非谓语形式，其基本形式：to＋动词原形，有时将to省略。下面结合中考英语试题，对其考点进行分析，希望对同学们全面掌握其用法有所帮助。 一、考查动词不定式的否定式 1．The teacher told Xiao Ming ________ late for school again．（2001福州） A．not to be B．not be C．don't be D．not to 2．Mrs Black asked the man ________ the queue．（2001广西） A．not to jump B．to not jump C．didn't jump D．not jump 3．You'd better ________ when your mouth is full of food．（2001广州） A．don't speak B．not to speak C．not speak D．not speaking 分析：动词不定式的否定形式是在不定式符号to前加not，但要注意：had better后接不带to的不定式，其否定式为：had better not do sth．。 二、考查动词不定式作主语 4．It's good ________ others when they are in trouble．（2001四川） A．helping B．to help C．help D．helps 分析：动词不定式作主语，常放在句中，而用it作为形式主语，置于句首。 三、考查动词不定式作宾语 5．All of us found ________ difficult to work out the maths problem．（2001黑龙江）A．it B．that C．which D．what 6．I thought ________ interesting to work in the fields．（2001连云港） A．that B．it C．this D．／ 7．She needs ________ warm clothes because it's cold today．（2001广东） A．wear B．wearing C．to wear D．to be worn 分析：要求用动词不定式作宾语的动词很多。但要注意：（1）动词不定式作think，make，find，feel等的宾语时，常用结构为：think ／make ／find ／feel＋it＋宾补（adj．／n．）＋to do sth；（2）need作实义动词时，后面可跟不定式作宾语。 四、考查动词不定式作宾语补足语 8．He asked me ________ to his birthday party．（2001长沙） A．to go B．go C．goes D．went
初中英语动词不定式用法 动词不定式是由“不定式符号to+动词原形”构成的一种非谓语动词结构。有些动词不定式不带to，动词不定式可以作句子的主语、表语、宾语、定语、补语、状语或单独使用。不定式保留动词的某些特性，可以有自己的宾语、状语等。动词不定式和它后面的宾语、状语等一起构成短语，叫作不定式短语。 一、用作主语 直接把动词不定式置于句首的情况不多，多数情况用it作形式主语，把真正的主语——动词不定式置于句末，特别是不定式短语较长时。动词不定式作主语，谓语动词用第三人称单数形式。带疑问词的不定式短语作主语常置于句首，复合不定式结构作主语常置于句末。如： 1. I t is our duty to try our best to deal with these problems. ' head teacher said it was necessary to talk with his mother. to learn English well is important. see is to believe.(眼见为实；百闻不如一见) 二、用作表语 动词不定式作表语，常说明主语的内容、性质、特征。如： | best way is to join an English club. first thing is to listen to the teacher carefully. 三、用作宾语 1.可以接带to的动词不定式作宾语的动词主要有：要求选择同意(ask, choose, agree)，期望决定学习(expect, hope, decide, learn)，宁可假装知道(prefer, pretend, know)，希望想要愿意(wish, want, would like / love)。如： 1)We decided to talk to some students about why they go there. ~ 2)He prefers to eat white bread and rice. 3)Id love to visit Mexico. 2.动词decide, know, learn, show, teach, tell...，介词结构on...可用疑问词带to的不定式短语作宾语，但why后面的不定式不带to。如： 1)Could you please tell me where to park my car 2)It gives advice on what to do in lots of different situations. ： 3.动词feel, find, make, think等后面，可以用it作形式宾语代替真正的宾语——动词不定式，句子结构是...feel / find / make / ... it+adj. / n.+to do...。如： I find it difficult to remember everything. 4.既可接动词不定式又可接ving形式作宾语，意思差别不太大的动词有begin, start, like, love等。一般说来，动词不定式表一次、数次的具体动作、将来动作或动作的全过程，ving形式表习惯性的连续动作。但是这种区别并不很严格，特别是美国英语，即使是习惯性的动作也可以用动词不定式。如： 1) Then I started to watch Tv. 2) I am beginning to understand my parents. .