be+动词不定式(即be+todosth.)

be +动词不定式（即be + to do sth.）的用法如下：

1.表示按计划或安排要做的事.例如：

When are you to leave for home你什么时候回家

She is to be married next month.她将于下个月结婚.

The Queen is to visit Japan in a week’s time.女王将于一周后访问日本.

这种结构也可用于过去.was / were to do sth.表示曾经计划要做的事,但不表明计划是否被执行,或表示“命运（即命中注定要发生的事）”,而非计划；was / we re to have done sth.表示未曾实现的计划.例如：

I felt nervous because I was soon to leave home for the first time.我感到很紧张,因为我很快就要首次离开家了.

They said goodbye,little knowing that they were never to meet again.他们告了别,不知道以后再也不会见面了.

We were to have told you,but you were not in.我们本来想告诉你的,但是你不在家.

2.表示“应该”,相当于should,ought to.例如：

You are to report to the police.你应该报警.

What is to be done应该怎么办呢

3.表示“必须”,相当于must,have to.例如：

The letter is to be handed to him in person.这封信必须亲手交给他.

You are to do your homework before you watch TV.看电视之前你得先做完作业.

4.表示“想,打算”,相当于intend,want.例如：

If we are to be there before ten,we’ll have to go now.如果我们要在十点前到,我们现在就得走.

5.用于第一人称疑问句,表示征求对方意见.例如：

Am I to go on with the work要我继续完成这项工作吗

What are we to do next我们下一步该怎么办

6.用于否定句,表示“禁止”,相当于mustn’t.例如：

The books in this room are not to be taken outside.这个室内的书籍不得带出室外.

You are not to smoke in the reading-room.你不可以在阅览室里吸烟.

7.表示“可以,可能”,相当于may,can.例如：

The news is to be found in the evening paper.这条消息可以在晚报上见到. Such people are to be found everywhere.这种人到处都有.

She is nowhere to be found.在哪里也找不着她.

to do sth.用于if或even if / even though从句中,表示对未来的假设.例如：

If I were to tell you that I killed him,would you believe me要是我告诉你是我杀了他,你会相信吗

Even if the sun were to rise in the west,I would never do such a thing.即使太阳从西边出来,我也决不做这种事.

to blame(该受责备,对某坏事应负责任)与be to let(待出租)两种结构中,用不定式的主动形式表示被动含义.例如：

Which driver is to blame for the accident这事故是哪个司机的责任

This house is to let.这房子要出租.

Exercise

have been looking for the boy all the afternoon but he is nowhere _____.

see be seen

early as his second film,Chaplin had developed his own manner of acting,th e one that ___ world famous.

become to become become

just saw John at the bookstore.

----That’s strange; I didn’t think he ____ back until tomorrow.

come to come coming to come

final examination ___early July.

to be held to be taken place

going to hold be to take place

the sun ___ tomorrow,what would we do

not to raise not rise

not rise not to rise

new hospital was to ____ in this district,but the money w asn’t collected ye t.

been built built built

at these .

’s going to rain ’s raining

is to rain can rain

do you think ____ for the failure of their marriage.

blame be blame to blame to be blamed

you nor he ____ to the front.

to be sent to be sent to be sent to send

____ to bed when there was a knock at the door.

going to to go about to go

we ____ again next week

----Yes,let’s make it next Wednesday.

; to meet ; be to meet

; meet ; meeting

students,we ____.

’t smoke not to smo ke

’t smoking ’t smoke

Key:

作业帮用户2017-10-13

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

动词不定式 动词不定式 不定式：to + 动词原形 知识梳理：提纲挈领，抓住重点和难点！ 动词不定式的基本形式是"to + 动词原形"，有时可以不带to。动词不定式（或不定式短语）没有人称和数的变化，在句子中不能作谓语。动词不定式仍可保留动词的特点，即可以有自己的宾语和状语。动词不定式同它的宾语或状语构成不定式短语。如：to read the newspaper, to speak at the meeting 等 动词不定式具有名词、形容词和副词的特征，因此在句子中可以作主语、表语、宾语、宾语补足语、定语和状语： 注：作主语用的动词不定式常常为it替代，动词不定式（或短语）放在后面。例如： It is not easy to learn a foreign language. It took us three days to do the work. 动词不定式的否定形式由"not+动词不定式"构成. 如: Tell him not to be late. The policeman told the boys not to play in the street.

4) 不定式省去to的情况: 在感官动词see，watch，look at，hear，listen to，feel和使役动词make，have，let等所接的宾语中（不定式做宾语不足语），不定式应省去to。但是在被动语态中不能省。如： Let me listen to you sing the song. He watched his son play computer games. I saw him run away.------He was seen to run away. The boss make the workers work the whole night.----The workers were made to work the whole night. 5) 动词不定式和疑问词连用 动词不定式可以和疑问词what ,which, how, where, when 等连用，构成不定式短语。如： The question is when to start. I don't know where to go . He showed me how to use a computer. What to do is a big problem. 例题解析：举一反三，学的更轻松！ 翻译下列句子，说出句中不定式的作用： 1. To grow plants is very important. 2. It is so nice to hear your voice. 3. My dream is to be a pilot. 4. He began to read and write at the age of five. 5. The teacher asked me to speak more loudly. 6. Tom came to see me last night. 7. I am glad to see you. 8.Have you got anything to say? 9.There are many places to see in China. 10.I asked him not to open the window. 11. I don't know what to buy for you.

动词不定式的用法讲解 一、动词不定式： 构成：to + 动词原形（to只是不定式符号，没有意义） 动词不定式作主语较长时，常用it作形式主语，而将真正的主语放在句末。 1.It + is/was+形容词+(for sb.) +动词不定式 To learn English well is useful. = It’s useful to learn English well.学好英语是有用的。 To protect environment is important for us. = It’s impor tant for us to protect environment.对于我们来说保护环境是很重要的。 2. It is / was + kind / good/ nice/ clever + of sb. + 动词不定式 It’s very kind of you to help me. 你帮助我真是太好啦。 It’s very clever of you to do like that. 你那样做真的太聪明啦。 3. It takes ( took , will take ) sb. some time to do something. (做某事花费某人…时间) 4.It is a good idea to do sth. 作宾语 1.常见的跟不定式作宾语的动词有： want to do sth. decide to do sth. hope to do sth. plan to do sth. offer to do sth. agree to do sth. learn to do sth try to do sth prefer to do sth promise to do sth. need to do sth. expect to do sth. 2. 主语+ find / think + it +形容词+ (for sb.) + to do I find it easy to read English every day. 我发现每天读英语和容易的。 He felt it hard to sleep.他觉得很难入睡。 I think it very interesting to learn English. 我认为学英语很有趣。 We found it impossible to cross the river. 我们发现过河是不可能的。 3.特殊疑问词+动词不定式作宾语 Can you tell me how to get to the post office? I didn’t know what to do next.

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

Unit 1 Life choices Lesson1 lifestyles 动词不定式测试 一、用所给动词的正确形式填空 1、George returned after the war, only ________ (tell) that his wife had left him. 2、Heavy rain struck Guangzhou in May, ________ (cause) people traffic problems. 3、We mustn't pretend__________________(know)what we don't know. 4、She pretended__________________(read)a novel when I came into the room. 5、The boy pretended__________________(finish)his homework. 二、根据所给汉语意思完成 句子 1.He is said ________ ________ ________ a new novel. 据说他写了一本新小说。 2. I wanted the letter________ ________ ________ at once. 我要这封信立刻打出。 3. They are said to__________ __________ __________in that area. 据说他们正在那个地区建房子。 4. Then the cold-blooded animal had no choice but ______ ________ _______and sleep. 然后，冷血动物没有别的选择只好躺下睡觉。 5. I think it possible ______ ______ _______ ________ ____him. 我认为跟他和睦相处应该是没有问题的。 三、句型转换 用＂疑问词＋不定式＂改写下列句子 1、How we should do it was discussed last night. ____________________________ was discussed last night. 2、I didn’t know where I should go. I didn’t k now ____________________________. 3、The difficulty was how we should cross the river. The difficulty was ________________________________ .

巧记跟不定式和动名词做宾语的动词用法 语法体现语言的规律,学好英语离不开语法学习。其中，动词的用法是重点，也是难点。对于谓语动词和非谓语动词的用法，学生普遍感到困难。学生感到50多个动词，用法难以掌握，但调整了单词的排列顺序，根据汉意编写顺口溜会方便记忆： （一）跟不定时作宾语的动词有： 打算(intend)计划(plan)和期盼(expect/desire) 假装(pretend)喜欢(would like/love/prefer)表祝愿(wish) 决定(decide)同意(agree)来帮助(help) 设法(manage)说服(persuade)不拒绝(refuse) 好像(seem/appear)答应(promise)做努力(attempt) 选择(choose)询问(ask)多学习(learn) 告诉(tell)失败(fail)也付得起(afford) 不定式宾语要牢记！ （二）跟动名词作宾语的动词有： 考虑（consider）完成（finish）多练习（practise） 避免（avoid）冒险（risk）求建议（suggest/recoomend） 面对（face）喜欢（enjoy/appreciate）和介意(mind) 允许（allow）承认（admit/permit）或放弃(give up/abandon) 推迟（put off/delay/postphone）逃避（escape）不原谅（excuse/pardon）提及（mention）坚持(keep/insist on）要想象（imagine/fancy） 还有词组feel like 和can’t stand！ 瞧！，我们就这样快快乐乐地记住了吧！ （三）在动词remember, try, regret, forget, need/want/require， stop, mean等后跟动名词V-和不定式意义不同，巧记一句话（记住努力；后悔忘记；需要停止；很有意义），学习采用对比法： remember to do something记着去做某事（现在还没有做） remember doing something记着曾做过某事（以前做过某事） try to do something努力、尽力做某事 try doing something试着做某事（看能否达到预期的结果） stop to do something开始做某事（停下正在做的事，开始做另一事） stop doing something停止做某事（停止正在做的事） regret to do something对将来做的事感到遗憾、惋惜 regret doing something对已经做过的事感到后悔

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 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.

动词不定式用法讲解 1、构成及特征 动词不定式(infinitive)是动词的一种非限定形式，即非谓语动词形式，它有两种形式：一种是“to + 动词原形”构成（to- infinitive）；另一种是不带to的不定式,即动词原形(bare- infinitive)。所有行为动词都有不定式形式，其否定式是在不定式前加not。动词不定式（或不定式短语）没有人称和数的变化，在句子中不能作谓语。动词不定式仍保留有动词的特点：（1）可以有时式和语态的变化，也可以有自己的宾语或状语，它们一起构成了不定式短语。He tried to work out the problem in five minutes.他试图在五分钟之内算出这道题。（带宾语和状语） The factory to be built here next year is a car factory.明年在这里建的工厂是一家汽车制造厂。（有语态的变化） （2）动词不定式还具有名词、形容词和副词的特征，在句中可以作主语、宾语、表语、补语、定语、状语等成分。 He wants to study English.他想学英语。（to study English在句中作want的宾语，而to study又有自己的宾语English, to study和English一起构成了不定式短语。）Never to offend anyone is his principle.不得罪人是他的原则。（不定式作主语） 注意：不定式在许多场合具有情态意义。作主语时，相当于一个带有情态动词的主语从句；作宾语时，相当于一个带有情态动词的宾语从句；作定语时，相当于一个带有情态动词的定语从句；作目的状语时，相当于so that 或in order that引导的目的状语从句。 It is right for her to say so.(= It is right that she should say so.)她这样说是对的。 He has a lot of work to do.(=…that he should do)他有很多工作要做。 I don’t know where to get the ticket.(= …where I could get the ticket.)我不知道哪

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,

2012年1月6日星期五 用动词不定式翻译下列句子： 1.学习英语最好的方法就是多听多说多写和多读。 2.我学习英语的最大的难题就是我不知道如何上课记笔记。 3.如何提高我的英语仍然让我迷惑不解。 4.你能给我些如何提高听力能力的建议吗 5.去哪里远足还是个问题。 6.我认为学好英语并不容易。 7.成为一名好歌手的秘密之一就是要不停地练习唱歌。 8.我认为经常与外国人谈话非常有益。helpful. 9.你认为课前预习功课，课后复习功课重要吗 10.我今天下午的一项工作就是读两本英语杂志。 11.我们正在讨论明天坐火车还是乘飞机去上海。 12.什么时候去野炊要看天气。 13.我们正在谈论明天到那里度假。

14.我的梦想就是将来在这个岛屿上建一座漂亮的房子。island岛屿 15.提高写作能力的的最佳方法就是每天记日记。 16.最好的学习方法之一就是坚持课后复习功课。 17.我在考虑如何将这句话翻译成汉语。 18.我一次有一次地劝他不要抽烟但他不听。 19.我对如何理解这篇课文非常感兴趣。 20.很荣幸和你在一起工作。 答案： 1.The best way to learn English is to listen more, speak more, write more and read more. to learn English 作定 语修饰the best way; to listen…..and read more 作表语2.My biggest problem with the study of English is that I don’t know how to take notes in class. how to take notes in class 作宾语 3.How to improve my English still puzzles me. how to improve my English 主语 4.Could you give me some advice on how to improve my listening ability how to improve my listening ability 介 词宾语

English语法之不定式及名词后加动词不定式 在English语法中，动词不定式是动词的一种不带词形变化从而不指示人称、数量、时态的形式。基本形式是to+动词原形，部分词和词组不带to也表达不定式。之所以叫做不定式，是因为动词不被限定、或者说不被词形变化所局限。不定式属于非谓语动词，即不能单独作谓语。但它毕竟是动词，所以有动词的属性，也可以理解此类动词形式为不定式状态的动词。动词不定式及其短语有自己的宾语、状语，虽然动词不定式在语法上没有表面上的直接主语，但它表达的意义是动作，这一动作一定由使动者发出,这一使动者称之为逻辑主语。 动词不定式可以作多种句子成分。 在外语学习的课程中，"动不式"的一般现在时被称作“词典用词”，因为它一般被用作词典中该动词的词头。 对于英语来说接不定式的单词多为“打算”“计划”“希望”“将要”等表示未来的动词。同样与不定时表示不同的动词不定式表示正在进行，一般性或经常发生性的行为。 A.不带to的不定式有四种情况： 1、1、let, make, have等使役动词后。 例如： Let us go!出发 The boss made the child labors work the whole night.老板逼迫童工整夜 劳作 注意：这些情况在被动语态中，不可省to. 例如：The child labors were made to work the whole night. 2、would rather, had better后。

例如：You had better stay at home.你最好呆在家 3、w hy…/w hy not…后。 例如：Why not have a happy rest on Sunday? 不定式的否定式是not to do.. / never to do..，不带to的不定式的否定式是not do.../ never do.. 例如：His parents tell him never to drive after drinking.他的父母告诉他酒后严禁驾驶 4.感官动词see, watch, look at, hear, listen to, smell, feel, find，notice等后作宾语补足语。 例如: I saw her dance.我看到她在舞 除以上四种情况之外，都不得省略to B. 动词不定式的复合结构 动词不定式的复合结构是“for sb. to do sth. / of sb. to do sth.” for / of引出不定式动作的逻辑主语。这种结构在句子中可以作主语、宾语、表语、定语、状语等。不定式复合结构的介词用for还是of，主要决定于前面形容词的性质。一般说来，of前面的形容词是careful, clever, foolish, good, kind, nice, wise等，既说明人的特性，又说明不定式动作的特性。for前面的形容词是dangerous, difficult, easy, hard, heavy, important, interesting, necessary等，一般说明不定式动作的特性，不说明人的特性。 例如：

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）

初中英语动词不定式讲解试题和答案 一、作主语，可以用it代替，it叫形式主语，动词不定式放在后面叫真正主语 1．To learn a foreign language is not easy. It is not easy to learn a foreign language. 2. It’s dangerous to drive very fast. 二、作表语 My idea is to ring him up at once. 我的想法是马上给他打电话。 如果主语部分含实义动词do，且作表语的动词又是“do”的内容，这时表语不定式的“to”可以省略。如：All I did was wait here. 我能做的就是在这里等。 三、常可接动词不定式作宾语的动词有：agree(同意), hope(希望), decide(决定), need(需要), mean(打算), wish(希望), fail(失败), want(想要), begin(开始), would like(想要)等。 He has decided to go to the countryside. 他已决心去乡下。 四、“疑问词+ 动词不定式”结构可以作动词know、think、find out等的宾语。 I don’t know who to ask. 我真不知道该问谁。 五、“疑问词+ 动词不定式”可以作动词show、teach、ask等后面的直接宾语。 She told me where to find the earphone. 她告诉我什么地方可以找到耳机。 六、如果宾语太长，可用it作形式宾语，构成“主语+ 谓语+ it + 宾语不足语(名词或形容词) + to do sth”结构，谓语动词常为find、think、feel等。 I found it difficult to stop him. 我发现拦截他很困难。 七、动词不定式可以作介词的宾语。 Autumn harvest is about to start. 秋收即将开始。 I’m worrying about what to do next.我正愁下一步该怎么办。 八、作定语的动词不定式与被修饰词有动宾关系。

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