高中动词不定式用法讲解及练习

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不定式用法讲解

非谓语动词----不定式非谓语动词有三种形式：不定式、动名词、分词。

动词不定式由“to+动词原形”构成，具有名词、形容词和副词的特征，可以在句中作主语、宾语、表语、定语、状语、补足语等,但不能作谓语。

同时，不定式仍保留着动词的某些特征，可以有自己的宾语、表语和状语，一起构成不定式短语；可以有自己的时态和语态变化形式;可以有自己的否定形式;可以带出自己的逻辑主语。

一、不定式的用法1、不定式作主语：不定式具有名词的特征，可在句子中充当主语。

To see once is better than to hear a hundred times. 百闻不如一见。

To master a foreign language is not an easy thing. 掌握一门外语不是一件容易的事。

To say is one thing and to do is another. 说是一回事，做又是另一回事。

To love and to be loved is the greatest happiness one can get. 爱与被爱是一个人能获得的最大幸福。

在很多情况下，人们通常用it作为形式上的主语，而把不定式短语移到谓语之后，使句子显得平稳一些。

如：It’s good manners to wait in line.排队等候是很有礼貌的。

It made us very angry to hear him speak to his mother like that. 听到他那样跟他妈妈说话我们很生气。

It's rude to turn your back to your teacher and refuse to answer. 背对着老师，拒绝回答问题是不礼貌的。

注意：当主语和表语都是不定式时，不能用形式主语代替动词不定式。

To respect others is to be respected. 尊重别人就是尊重自己。

(完整版)动词不定式教案和练习

Infinitives动词不定式教课目的：1.掌握动词不定式的几种形式2.掌握动词不定式在句子中能够作什成分3.掌握动词不定式用法/功能4.掌握运用动词不定式注意事项教课难点：动词不定式用法教课方法：经过放映幻灯片，教师解说，学生思虑，最后总结的方法来实现本课的教课任务。

教课过程：Step1.出示幻灯片让学生认识动词不定式的几种形式1.动词不定式的基本形式to + 动词原形有时能够不带2.动词不定式的否认形式to( 秃顶不定式）not/never + to donot/never + do3.不定式的逻辑主语It ’ s good for you to do morning exercises.The question is too difficult for us to answer. Itroom.It ’ s very kind of you to think of the others.’toos dark for me to see anything in the 假如要说明不定式表示的动作是谁做的，能够在不定式前加一个for(of) 惹起的短语。

介词for(of) Step2.的宾语叫不定式的逻辑主语。

请学生思虑：动词不定式在句子中能够作什成分？学生得出结论：1.作主语2. 作宾语3. 作宾语补足语4. 作定语5. 作状语5.作状语6.作表语7.与疑问词等连用Step3. 出示幻灯片让学生依据总结结果增强记忆。

Step4. 议论动词不定式用法/功能，并总结：(1). 作主语To see is to believe.It ’ s exciting to surf on the Internet作主语的不定式假如很短，往常位于句首；若不定式（短语）较长时，常用 it 作形式主语，而把真实的主语（即动词不定式）放在后边以防止虎头蛇尾。

(2) 宾语I want to go home.The workers decided to get better pay.I found it necessary to talk to him again.常用动词不定式作宾语的动词有：want, hope, wish, refuse, learn,would like, choose, decide, agree,pretend, expect, planHe found it very difficult to get to sleep不定式作宾语时，如带有宾语补足语，则要把不定式放到后边，用it作形式宾语，组成“主语 +动词 +it+ 宾补（形容词、名词）+不定式”构造。

动词不定式用法及练习

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。

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 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.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。

动词不定式用法全解(含测试题及答案)

动词不定式用法全解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。

动词不定式的形式：第一部分动词不定式的时态一、动词不定式的时态：动词不定式不能在句中作谓语，尽管它本身有时态的变化，但是却不能靠自身的变化形式表示动作发生的具体时间。

动词不定式发生的时间，一般只能根据谓语动词的时间，产生相对的先后时间关系。

1．不定式的一般式，表示不定式的动作与谓语动词动作几乎同时发生，或在谓语动作之后发生，或者不强调不定式动作的时间性。

但不定式表原因时，往往先于谓语动作之前发生。

如：The news will not fail to surprise him.这个消息将不会不使他大吃一惊的。

（不定式动作在将来和谓语动作同时发生）I helped to repair the car.我帮助修理汽车。

（不定式动作在过去与谓语动作同时发生）He didn't know where to go.他不知道该去哪儿。

（不定式稍晚于谓语动作）Tell your brother not to come tomorrow.告诉你哥哥明天不要来。

（不定式晚于谓语动作）判断：He decided to sell his car.I tried to go to school in time.I hope to see you soon不定式表示谓语动作的原因时，往往发生在谓语动作之前。

如：I am very happy to see you here.She seemed surprised to meet us.（先是遇见我们，她然后很吃惊）2．不定式的完成式，通常表示动作发生在谓语动词之前。

高中英语-不定式用法讲解精心原创

高中英语动词不定式用法讲解非谓语之一：不定式to do一、关于不定式的几个关键问题：问题1 ：何时用不定式？----表示要做的事情时。

问题2：不定式能干什么？---什么都行。

谓语除外。

1.To help the poor is our duty. 主语2. Our duty is to help the poor. 表语3. I have some work to do.定语4. I come here to see you. 状语5. Please tell him to come early.补语6. We want to help the poor. 宾语问题3：做不定式的习题应该主语不定式的什么形式变化？（1）动名词与不定式的区别：动名词表达的是：抽象，经常性，已发生的不定式表达的是：具体，一次性，将发生的The heavy rain flooded the village, causing many injuries and deaths.He hurried to the airport,only to be told that the flight had been cancelled.（2）有些动词如start,begin,continue,like接不定式或动名词作宾语，意义基本相同。

（3）有些动词如remember,forget,stop接不定式或动名词作宾语，意义大相径庭。

二、不定式相关知识点精讲:（1）不定式的用法：①作主语不定式短语作主语时，可以直接放在句首，但在很多情况下，用先行代词it作形式主语。

例如：To see is to believe. 眼见为实。

It is right to give up smoking．戒烟是对的。

不定式作主语，it作形式主语的常见句型如下：a. It is + adj (easy, important, difficult…) +不定式b. It is + n (a pity, a pleasure, one’s duty, a shame) +不定式c. It takes/needs/requires + some time (hours, months, days, patience…) +不定式It’s important for us to learn English well.我们学好英语很重要。

动词不定式讲解及练习

第一讲动词不定式+综合练习一、目标展示。

仔细观察下列句子，注意划线部分的用法。

1. Sally never forgets to do her homework.2. I agreed to go with them.3. We decided to go out for dinner.4. I hope to study music in France.5. We plan to visit her tomorrow.二、结构肯定形式to do否定形式not to do三、用法1. 作主语eg: To play on the street is very dangerous for children.注意：(1) 为了避免头重脚轻，通常都将作主语的动词不定式置于句子后面，而在句首的主语位置使用形式主语itTo play on the street is very dangerous for children.= It is very dangerous for children to play on the street.(2) 常见的it 作形式主语，动词不定式作真正主语的句式有：A. It is +adj+for/of sb to do sth.eg. It is kind of you to help me.B. It takes/took sb. +时间/金钱+ to do stheg. It takes me an hour to finish my homework.2. 作表语eg. He seems to be very rich.3. 作宾语eg. She likes to talk about it.注意：it 也可作形式宾语，而把真正作宾语的动词不定式放在后面,主要句式有：make / find / think + it +adj.+ to do sth.eg: I find it hard to learn a foreign language well.4. 作定语当名词或代词前有序数词、the only、the last 等修饰时，名词后面要用to do做定语eg. He is always the first student to go to school.▲四．常见直接接不定式to do 作宾语的动词afford 负担得起agree 同意decide 决定hope 希望learn 学习promise 答应offer 主动提出plan 计划prepare 准备refuse 拒绝want 想要would like 想要，愿意eg. I would like to have a cup of coffee.I hope to meet you tomorrow.▲五．常见构成“动词+宾语+不定式to do”结构的动词advise 建议allow 允许ask 请求tell 告诉encourage 鼓励invite 邀请order 命令teach 教warn 警告eg. The teacher told the students to keep quiet.He asked me to wait for him at the gate.▲★六．特殊情况1. 使役动词后省to 的情况：在主动语态中，let/make/have 等使役动词后用作宾语补足语的不定式必须省略to；eg. He made me do a lot of homework.2. 感观动词后省to 的情况：在see, hear, notice 等词后用作宾语补足语的不定式须省略to；eg. I saw him enter the hospital.拓展：see/hear/notice + sb. + doing 表示“看到、听到某人正在做某事”eg. I saw him playing basketball on the playground just now.3. 动词help 后既可接to do 也可接do；eg. Can you help me (to) clean the room?4. You’d better 后接不带to 的不定式；eg. You’d better do your homework first.5. 特殊疑问词+ to do【课堂练习】一、用所给动词的适当形式填空。

动词不定式用法讲解

动词不定式用法讲解------------------------------------------------------------精品文档-------------------------------------------------------- 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 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：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。

动词不定式用法解析及练习题

动词不定式用法解析及练习题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。

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。

动词不定式用法与专项练习

word格式-可编辑-感谢下载支持动词不定式: to+do (高二2016.2)动词不定式由“to + 动词原形”组成，是动词的一种非谓语形式。

动词不定式在句中可充当主语、表语、宾语、定语、状语、宾补、主补。

1. 动词不定式在句中的语法功能：(1)动词不定式（短语）作主语To love is to be loved. 爱别人就是被人爱。

To teach is to give. 教书就是奉献。

*to do和v-ing作主语时的区别:Smoking is a bad habit. (v-ing作主语表示习惯性动作)To stay home on such a cold night is comfortable. (动词不定式作主语表示偶然性或一次性的动作)*不定式作主语和目的状语时的区别。

例如：To get up early does good to one’s health.早起对身体有好处。

（作主语）To get up early, one must go to bed early.为了早起，必须早睡。

（作目的状语）(2) 动词不定式（短语）作宾语I will leave it to you to make the final decision. 我将由你来做最后的决定。

(it作形式宾语)She decided to quit her job at last. 最后，她决定辞职。

*"疑问词+ 动词不定式短语"作宾语：I don't know what to do. 我不知道该怎么办。

The children are learning how to play the game. 孩子们在学做游戏。

例如（NMET2000）：I’ve worked with children before, so I know what ____ in my new job.A. expectedB. to expectC. to be expectingD. expects (答案:B)(what to expect在句中作know的宾语，而what作不定式to expect的逻辑宾语。

动词不定式用法详细讲解

动词不定式用法详细讲解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。

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 doIt's our duty to take good care of the old.②It takes sb+some time+to doHow long did it take you to finish the work?③It＋be＋形容词＋for sb＋to doIt is difficult for us to finish writing the composition a quarter of an hour.④It＋be＋形容词＋of sb＋to doIt is stupid of you to write down everything the teacher says.⑤It seems(appears)＋形容词＋to doIt 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,longmanage,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。

高一(5)动词不定式讲解、练习

高一英语暑期复习材料（5）词汇巩固A Horrible Earthquake可怕的地震Dirty water rose in well s and canal s before the e . But no one (判断) that an earthquake was coming. Suddenly, everything shook. It seemed（似乎）he world was （结束）. Millions brick houses and（许多）dam s were d . Railway track s became useless bar s. Pipe s in mine s （爆裂）and let out smelly steam. Huge crack s t cyclist s everywhere.The next day, this （事件）was the headline or main（标题）of all newspapers. With the reporter s giving an outline of the （灾难）, the whole（国家）was shock ed by the damage and the victim’s extreme s . People were moved when they read that the survivors comforted each other by saying “Congratulations! You survived!” So they not only （表达）their sympathy sincerely, but also organized together to help the victims （立刻）. The （受伤的）were rescue d and the dead were buried. The （吓坏的）survivors were dug out from under the (废墟) and were offered （避难所）fresh water and electricity. ____________(幸亏) people’s help, the loss was minimized.The Great President伟大的总统As the （创始人）of the republic, the president had many good （品质）. Before coming to p , he was a generous （律师）. He（）selflessly help everyone who（向……求助）him. He accepted no （费用）to offer legal guidance and （意见）to those who were （失业）or un educate d. Later, believing all mankind to be（平等的）, he devote d himself stopping the u anti-black laws. He （建立）the Black Youth League and was v to be the leader. However, though he kept （和平的）principle s without violence and terror, his（卑鄙的）enemies still blewhis house and （袭击）his relative s, and he himself couldn’t （逃脱）be ing sentenced 30 years in prison.Not fearing of the prison guards’ cruelty, he kept （积极的）and beg ged no mercy from them. ______________________________(事实上), he was always h and never（灰心）during the stage even though he was （处于困难中）.Finally, people （回报）him with the leader’s position and a gold blanket.非谓语动词1 —动词不定式非谓语动词: a.动词不定式 b.动名词 c.分词( 现在分词过去分词)概述：1.谓语动词：在句子中担任谓语的动词2.非谓语动词：是动词的特殊形式，在句中可以作除谓语外的所有成分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）,又没有连词的情况下, 还有别的动词出现时。

(完整版)高中动词不定式用法讲解和练习

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。

高中英语非谓语动词用法详解及练习(含答案详解)

非谓语动词之五兆芳芳创作非谓语动词（一）——动词不定式动词不定式、分词(现在分词，过来分词)和动名词统称为非谓语动词.现代英语将现在分词和动名词合为一大类叫作v + ing形式.这些动词的形式不克不及在句中单独作谓语用，因而没有语法主语.但可以有逻辑主语.由于没有语法主语，也就不受人称和数的限定，因为不是谓语，也就没有时态和语态，但这些词仍能暗示动作和状态，所以仍有暗示与其他动词相对时间关系的形式.由于与其它词有逻辑上的主谓关系，因此也有暗示主、主动的形式，同时也有自己的宾语和状语，一起组成非谓语动词的短语(动词不定式短语，分词短语，动名词短语).动词不定式、过来分词及v-ing形式在句中均不克不及作谓语用，所以叫做非谓语动词.（一）动词不定式：动词不定式由“to+ 动词原形”组成，如：to study, to play，动词不定式虽然不克不及作谓语动词用，但仍留着动词的特征，它可以带有所需要的宾语或状语而组成动词不定式短语，如：to study hard, to play table tennis.1、动词不定式的形式变更：动词不定式有下列时态和语态的形式变更.2、动词不定式的根本用法：动词不定式能起名词、形容词和副词的作用，可在句中作主语、表语、宾语补足语、定语和状语用，如：（1）作主语：To help each other is good.（动词不定式作主语时，一般可用it作形式主语，而将作主语的动词不定式置于句末，如：It is good to help each other.（2）作表语：My job is to drive them to the power station every day. 动词不定式在系动词be之后作表语，与暗示未来时的be + 动词不定式结构有所区别，如：Our plan is to set up another middle school for the peasants’ children.我们的筹划是给农民子弟再成立一所中学.（句中的谓语动词为is，动词不定式to set up… 为表语，主语为plan，但plan其实不是动词不定式的逻辑主语，即动词不定式to set up所暗示的动作不是主语plan产生的.）We are to set up another middle school for the peasants’ children.我们将为农民的子弟再成立一所中学.（句中的are to set up整个结构为句中谓语，主语为we，同时也是动词不定式to set up所暗示的动作的逻辑主语，即动词不定式to set up所暗示的动作是由we产生的）.（3）作宾语：①作及物动词的宾语，如：She wishes to be a musician.；②作某些形容词的宾语：可以有动词不定式为宾语的形容词一般有glad, sorry, afraid, pleased, determined, willing, eager, anxious, ready, sure等，如：I am determined to give up smoking.；③动词不定式一般不作介词的宾语，但动词不定式之前如有疑问词时，就可作介词的宾语，如：Can you give us some advice on what to do next?（4）作宾语补足语，如：Tell the children not to play on the street. 如果句中的谓语动词为see, hear, watch, notice, have, make, let等，作宾语补足语的动词不定式须将to省去，如：I saw a little girl run across the street.（5）动词不定式在句中作宾语，如带有宾语补足语时，须先用it 作形式宾语，而将该动词不定式后置，如：I don’t think i t right to do it that way.（6）作定语：动词不定式作定语时，须位于被其修饰的名词或代词之后，如：Is this the best way to help him? 和定语用的动词不定式如果是不及物动词，不定式前面就要用需要的介词，如：He is the man to depend on. 如果被不定式修饰的名词为place, time, way，不定式前面的介词，习惯上可以省去，如：The old man is looking for a quiet place to live.（7）作状语：动词不定式可以作下列的状语：①目的状语：Every morning he gets up very early to read English. 为了强调不定式暗示目的的作用，可在不定式前加in order to或so as to（以便或为了），但应注意in order to位于句首或句中均可，而so as to不克不及位于句首，如：She reads China Daily every day in order to (so as to) improve her English. 将暗示目的的不定式置于句首，也可强调目的的作用，如：To master a foreign language, one must work hard at it. ②结果状语：They lived to see the liberation of their home town.他们活到亲眼见到了他们故乡的解放.③too + 形容词或副词+ 动词不定式，暗示“足能…”的结果，如：You are old enough to take care of yourself now.3、复合结构不定式：由for + 名词（或代词宾格）+ 动词不定式即组成复合结构的动词不定式.其中for自己无意义.for前面的名词或代词是不定式的逻辑主语，这种不定式在句中可作主语、表语、宾语、定语或状语，如：It is very important for us to get everything ready for the harvest. 当作表语用的形容词暗示不定式的逻辑主语的性质或特征时，就用介词of而不必for引出不定式的逻辑主语，这些形容词一般有good, nice, kind, wise, silly, stupid, foolish, right, wrong, careless, impolite等，如：It is very kind of you to help him every day.4、疑问词+ 动词不定式：疑问代词和疑问副词后可加动词不定式组成不定式短语，在句中可作主语、表语或宾语，如：How to prevent them from swimming in this river is a problem.5、动词不定式的否认式：动词不定式的否认式是由not + 动词不定式组成，如：It’s wrong of you not to attend the meeting.6、动词不定式的时态形式所暗示的时间关系：（1）一般式：动词不定式一般式所暗示的动作是和谓语动词所暗示的动作同时产生，但在多数情况下，是在谓语动词所暗示的动作之后产生，如：We decided to plant more trees this spring.（其后），They often watch us play table tennis.（同时）；（2）完成式：动词不定式完成式所暗示的动作产生在谓语动词所暗示的动作之前，如：I am sorry to have kept you waiting.（3）进行式：动词不定式进行式所暗示的动作正在进行中，并且与谓语动词所暗示的动作同时产生，如：She happened to be writing a letter in the room when I came in.7、动词不定式的主动语态用法：如果动词不定式的逻辑主语为这个不定式所暗示的动作的承受者时，不定式一般就用主动语态形式，如：What is to be done next hasn’t been deci ded yet.非谓语动词（二）——动词-ing形式（二）-ing形式：动词的-ing形式也是一种非谓语动词.-ing形式仍保存有动词的特征，可以带有其所需要的宾语或状语而组成-ing短语.1、-ing的形式：-ing有一般式和完成式.及物动词的-ing还有主动语态和主动语态，而不及物动词的-ing则没有主动语态.现在以及物动词make 和不及物动词go为例，将其-ing各类形式列表如下：2、-ing形式的根本用法.（1）作主语：Seeing is believing.百闻不如一见.Talking is easier than doing. –ing作主语时，如果其结构较长，可用it作形式主语，而将作主语的-ing后置.如：It isn’t much good writing to them again. It’s no use waiting here.（2）作表语：Her job is washing and cooking. My hobby is collecting stamps.（3）作宾语：①作及物动词的宾语.She likes drawing very much.；②作某些短语动词的宾语. Mary is thinking of going back to New York.；③do+限定词（my, some, any, the等）+ -ing，暗示“做…事”之意，如：We often do our cleaning on Saturday afternoon. Will you do any shopping on Saturday this afternoon? ④作介词的宾语：Her sister is good at learning physics.；⑤作形容词worth, busy等的宾语：This book is well worth reading. –ing作宾语带有宾语补足语时，要用it作为形式宾语，而将作宾语的-ing后置，如：We found it no good talking like that. Do you think it necessary trying again?（4）作定语：The sleeping child is only five years old. Do you know the man standing at the gate? 注：-ing形式作定语用时，如果-ing只是一个单词，就位于其修饰的名词之前，如果是-ing短语，就位于其修饰的名词之后，-ing作定语时，被-ing所修饰的名词就是该-ing的逻辑主语.另外，-ing作定语用时，其动作和句子谓语动词所暗示的动作是同时进行的，如果不是同时进行的，就不克不及用-ing作定语，要使用定语从句，如：The girl who wrote a letter there yesterday can speak English very well.（5）作宾语补足语：We can see steam rising from the wet clothes. 注：当-ing在复合宾语中作宾语补足语用时，句中宾语就是这个-ing的逻辑主语，可以带有这种复合宾语的动词有see, watch, hear, observe, feel, find, have, keep等.（6）作状语：①时间状语：Seeing Tom, I couldn’t help thinking of his brother. 分词在句中作时间状语时，其前一般可加when或while，如：When crossing street, you must be careful. ②原因状语：Being ill, he didn’t go to school yesterday. ③方法或陪伴状语：Mary stood at the school gate waiting for Betty.3、主动语态-ing完成式的根本用法.主动语态-ing完成式所暗示的动作产生在句中谓语动词所暗示的动作之前，一般在句中作时间或原因状语用.句中的主语是它的逻辑主语，并且是它所暗示的动作的执行者，如：Having answered the letter, she went on to read an English novel.4、主动语态-ing一般式的根本用法.主动语态-ing一般式所暗示的动作是一个正在进行中的主动动作，并且这个主动动作也是和句中谓语所暗示的动作同时产生的.它一般在句中作定语或状语用.如：The truck being repaired there is ours.5、主动语态-ing完成式的根本用法.主动语态-ing完成式所暗示的动作产生在谓语动词所暗示的动作之前，在句中一般作状语用.如：Havingbeen shown the lab, we were taken to see the library.6、-ing形式的复合结构.在-ing前加物主代词或名词所有格即组成-ing的复合结构.其中的物主代词或名词所有格为-ing的逻辑主语.这种结构在句中可作主语、宾语或表语，如：Your smoking and drinking too much will do harm to your health. 但在口语中，这种结构如作宾语用，其中的物主代词经常使用人称代词的宾格，名词的所有格经常使用名词的普通格代替，如：She insisted on Peter’s (or Peter)going there first.7、-ing形式与动词不定式在句中作主语、表语、宾语时的区别.一般说来，暗示一个比较抽象或泛指的动作时多用-ing形式.暗示一个具体某一次的动作时，多用动词不定式，如：Our job is making steel. She likes playing the piano, but she doesn't want to play it today.8、-ing形式与动词不定式在句中作定语的区别.-ing形式作定语用时，其动作一般与句中谓语动词所暗示的动词同时产生，而动词不定式作定语时，其动作一般产生在句中谓语动词所暗示的动作之后.如：The girl writing a letter there can speak English very well./I have three letters to write.9、-ing形式与动词不定式在作宾语补足语时的区别.（1）不定式作宾补时，其动作一般产生在谓语动词所暗示的动作之后，如：I have told them to come again tomorrow.（2）在see, watch, hear, feel等之后，如果用-ing形式作宾补，暗示其动作正在进行中，而用不带to的不定式作宾补时，不定式所暗示的动作是一个动作的进程，如：I hear her singing in the room.我听见她正在屋里唱歌. I hear her sing in the room.我听见她在屋里唱过歌.10、-ing形式与动词不定式在句中作状语的区别.-ing形式在句作状语暗示时间、原因、方法或陪伴情况，而动词不定式一般式在句中作状语时，一般是作目的或结果状语，如：Not receiving his letter, I wrote to him again./ I looked into the window to see what was going on inside.非谓语动词（三）——过来分词( 三）过来分词：1、过来分词的根本用法：过来分词只有一种形式，也没有主动语态，它所暗示的动作是一个主动的或是已完成的动作.过来分词在句中也可用作定语、表语、宾语或状语等成分.过来分词在句中作某种成分时，其逻辑主语一般为该分词所暗示的动作的承受者，如：（1）作定语：过来分词作定语时，如果这个分词是一个单词，就位于其修饰的名词之前，如果是分词短语，就位于其修饰的名词之后.被过来分词所修饰的名词，就是该分词的逻辑主语，如：The stolen car was found by the police last week.（2）作表语：过来分词作表语时，暗示其逻辑主语所处的状态，其逻辑主语就是句中的主语，如：The glass is broken.这个玻璃杯是破的. 注：过来分词作表语时，和动词的主动语态结构相似，但两者表达的意义不合，如：The glass was broken by my little brother.这个玻璃杯是被我小弟弟打破的.作表语用的过来分词在许多词典中已列为形容词，如：crowded, devoted, discouraged, done, dressed, drunk, experienced, frightened, gone, hurt, interested, killed, known, learned, lost, pleased, satisfied, shut, surprised, tired, undressed,worried, astonished, broken, completed, covered 等.（3）作宾语补足语：过来分词作宾语补足语时，句中的宾语就是其逻辑主语，如：When I opened the door, I found the ground covered by fallen leaves. 注：动词have后的复合宾语中，宾语补足语如为过来分词，常暗示该分词所暗示的动作是由他人来执行的而不是句中主语自己来执行的，如：I had my bike repaired yesterday. 昨天我（找他人）把我的自行车给修了.（4）作状语：过来分词作状语时，相当于一个状语从句，该结构的逻辑主语一般都是主句的主语，是过来分词所暗示意义的逻辑宾语.为了使作状语的过来分词意义加倍明确，常在分词前加when, if, while, though, as等连词，如：Seen from the hill/ When seen from the hill, our town looks beautiful.; Given more time/ If given more time, we could have done it better.（we是该结构的逻辑主语，是give的逻辑宾语.）独立主格：上述-ing和过来分词的用法中，-ing和过来分词在句中均有逻辑主语，但有时它们也能有自己的独立的主语，这种独立的主语，一般为名词或代词，位于其前之前，和-ing或过来分词组成独立主格.独立主格在句中一般只作状语用，而-ing和过来分词作用的形式，则要按照它们所暗示的动作和句中谓语动词所暗示的时间关系而定.至于独立主格中是使用-ing或是过来分词，则要按照它们的主语和其所暗示的动作的主动主动关系而定，如：The bell ringing, we all stopped talking. 注：The work having been finished, she sat down to have a rest. ①独立结构中的being或having been常可省去，如：The meeting (being) over, all left the room. ②作陪伴状语的独立结构常可用with短语来代替，如：She read the letter, tears rolling down her cheeks./ She read the letter with tears rollingdown her cheeks.2、-ing形式与过来分词的区别：（1）语态不合：-ing形式暗示主动概念，及物动词的过来分词暗示主动概念.an inspiring speech鼓舞人心的演说；the inspired audience受鼓舞的听众.（2）时间关系不合：现在分词所暗示的动作一般是正在进行中的动作，而过来分词所暗示的动作，往往是已经完成的动作，如：The changing world正在产生的世界；the changed world已经起了变更的世界.易错易混点1．疑问词＋动词不定式：疑问代词和疑问副词后可加动词不定式组成不定式短语，在句中可作主语、表语或宾语，如：How to prevent them from swimming in this river is a problem.2．动词不定式的否认式：由not ＋动词不定式组成.3．v.-ing形式与动词不定式在句中作主语、表语、宾语时的区别.v．-ing形式：暗示抽象或泛指的动作.不定式：暗示具体某一次的动作.She likes playing the piano, but she doesn't want to play it today.4．v.-ing形式与动词不定式在句中作定语的区别.v．-ing形式：动作与谓语动词所暗示的动作同时产生.不定式：动作产生在谓语动词所暗示的动作之后.eg. The girl writing a letter there can speak English very well.I have three letters to write.5．v.-ing形式与动词不定式在作宾语补足语时的区别.(1)不定式作宾补时，其动作一般产生在谓语动词所暗示的动作之后，如：I have told them to come again tomorrow.(2)在see, watch, hear, feel等之后，如果用v.-ing形式作宾补，暗示其动作正在进行中，而用不带to的不定式作宾补时，不定式所暗示的动作是一个动作的进程，如：I hear her singing in the room. 我听见她正在屋里唱歌.I hear her sing in the room. 我听见她在屋里唱过歌.6．v.-ing形式与动词不定式在句中作状语的区别.v．-ing形式：暗示时间、原因、方法或陪伴情况.不定式：作目的或结果状语.7．v.-ing形式与过来分词的区别：(1)语态不合：v.-ing形式暗示主动概念，及物动词的过来分词暗示主动概念.an inspiring speech鼓舞人心的演说； the inspired audience受鼓舞的听众(2)时间关系不合：现在分词所暗示的动作一般是正在进行中的动作，而过来分词所暗示的动作，往往是已经完成的动作，如：the changing world正在变更的世界 the changed world已经变更了的世界8．独立主格结构：有时v.-ing和过来分词在句中也有自己的独立的主语，这种独立的主语一般为名词或代词，和v.-ing还有过来分词组成独立主格结构.该结构在句中一般只作状语. 独立主格中是使用v.-ing仍是过来分词，则要按照它们的主语和其所暗示的动作的主动或被动关系来定，如：The bell ringing, we all stopped talking.注意：①独立结构中的being或having been常可省去，如：The meeting_(being)_over, all left the room.②作陪伴状语的独立结构常可用with短语来代替，如：She read the letter, tears rolling down her cheeks.＝ She read the letter with tears rolling down her cheeks.非谓语的解题步调或思路（1）先判断空格部分所需的是主句，从句仍是非谓语动词.独立的句子，从句或非谓语独立的句子加句号，分号或破折号的话，后再加一个独立的句子.独立的句子，（逗号）有and,but, so 等词加独立的句子. （2）再按照主句的主语，来判断主动或主动；（3）接下来再判断时态，（4）如果是否认的话，not一定要放在非谓语的前面（5）一定不要忘记主语一致的原则，如果不一致的话，要把非谓语的独立主语加上.非谓语罕有的位置，或在句子中所担当的成分（1）非谓语动词短语， + 主句或是主句，非谓语动词短语这时的非谓语动词短语起到状语的作用例如： influenced by the growing interest in nature, more people enjoy outdaoor activities.在这种情况下，首先,找出主句的主语，然后以主句的主语为出发点，来判断非谓语动词是主动仍是主动，如果已有的非谓语动词的主语和主句主语不一致，还要考虑独立主格结构，也就是把非谓语动词的自己的主语加上去：例如： All flights having been cancelled , they decided to take the train. 其次,把非谓语动词和主句的动词比较，看是否同时产生仍是有明显的先后.（2）跟在介词，动词或某些形容词的前面固定搭配只接动词-ing形式而不接不定式作宾语的动词有：admit 承认 appreciate 感谢 avoid 避免 put off 推迟 keep 保持 consider 考虑 delay/ postpone 耽搁 dislike 嫌恶 resist 抵制 mention 提及 enjoy 喜欢 escape 避免 excuse 原谅 practice 练习 mind介意 fancy想不到 feel like 意欲 finish 完成 risk 冒险 include 包含 forgive 原谅 give up 保持 suggest 建议 miss 逃过 imagine 想象can’t help 情不自禁 involve 需要can’t stand 无法忍受 understand 理解罕有的带介词to的短语：be used to 习惯be related to 与……有关 get down to 着手做 contribute to 奉献put one’s mind to 全神灌输于 give rise to 引起 be equal to 胜任 devote oneself to 献身于lead to 导致 be opposed to 否决 look forward to 盼望 object to 否决stick to 保持 pay attention to 注意（3）介词后一定要加动词的-ing 形式；（4）跟在名词前面做定语时，一般不必having done/ having been done 结构（5）放在句首做主语，一般用动词的ing 和to do …特殊的非谓语短语 Generally speaking 一般来说Considering …. 考虑到，鉴于Time/weather permitting 时间、天气允许的话Taking …into account 考虑到Taking …into consideration 考虑到Provided …假设Providing…假设Suppose…假设Supposing…假设Judging from/ by…按照…判断Given sth 假设，如果；鉴于，考虑到Given that…假设，如果；鉴于，考虑到 including sth (sth included)包含某事非谓语动词根本练习1. He looked around and caught a man ______ his hand into the pocket of apassenger. A. put B. to be putting C. to put D. putting2. When you’re learning to drive, _______ a good teacher makes a big difference.A. haveB. havingC. and haveD. and having3. I felt it a great honor ______ to speak to you.A. to askB. askingC. to be askedD. having asked4. I would love _______ to the party last night but I had to work extra hours to finish a report.A. to goB. to have goneC. goingD. having gone5. Before you decide to leave your job, _______ the effect it will have on your family.A. considerB. consideringC. to considerD. considered6. Robert is said _______ abroad, but I don’t know what country he studie d in.A. to have studiedB. to studyC. to be studyingD. to have been studying7. It is said that in Australia there is more land than the government knows _______.A. it what to do withB. what to do it withC. what to do with itD. to do what with it8. Anyone _______ bags, boxes, or whatever, was stopped by the police.A. seen carryB. seen carryingC. saw to carryD. saw carrying9. Mr Reed made up his mind to devote all he had to _______ some schoolsfor poor children. A. set up B. setting up C. have set up D. having set up10. The discovery of new evidence led to _______.A. the thief having caughtB. catch the thiefC. the thief being caughtD. the thief to be caught11. She looks forward every spring to _______ the flower-lined garden.A. visitB. paying a visitC. walk inD. walking in12. To test eggs, _______ them in a bowl of water: if they float they’re bad, if they sink they’re good.A. putB. puttingC. to putD. to be putting13. “Where is David?”“He is upstairs ______ ready to go out.”A. to getB. gettingC. to be gettingD. having got14. “Mum, why do you always make me eat an egg every day?”“________ enough protein and nutrition as you are growing up.”A. GetB. GettingC. To getD. to be getting15. He was reading his book, completely _______ to the world.A. lostB. losingC. to loseD. to have lost16. We looked everywhere for the keys, but they are nowhere _______.A. to findB. to have foundC. to be foundD. being found17. The boy wanted to ride his bicycle in the street, but his mother told him _______.A. not toB. not to doC. not do itD. do not do18. A cook will be immediately fired if he is found _______ in the kitchen.A. smokeB. smokingC. to smokeD. smoked19. Finding her car stolen, _______.A. a policeman was asked to helpB. the area was searching thoroughlyC. it was looked for everywhereD. she hurried to a policeman for help20. “How do you deal with the disagreement between the company and the cus tomers?”“The key ______ the problem is to meet the demand ______ by the customers.”A. to solving, makingB. to solving, madeC. to solve, makingD. to solve, made21. “What do you think made Mary so upset?”“_______ her new bike.”A. As she lostB. LostC. LosingD. Because of losing22. The research is so designed that once _______ nothing can be done to change it.A. beginsB. having begunC. beginningD. begun23. Though ________ money, his parents managed to send him to university.A. lackedB. lacking ofC. lackingD. lacked in24. Tony was very unhappy for _______ to the party.A. having not been invitedB. not having invitedC. having not invitedD. not having been invited25. Though I have often heard this song _______. I have never heard you _______ it.A. being sung, sangB. sang, singingC. sung, singD. to be sung, to sing非谓语动词提高练习1. The great hall was crowded with many people, __ many children __on their parents’ lapA. including; seatedB. including; seatingC. included; satD. included; sitting2. It’s said that the Olympic Games _____ in Beijing in 2008 will cover more events than any other Olympics did.A. holdingB. to be heldC. heldD. to be holding3. _____ for a long time, most of the crops in this area died from lacking water.A. Being no rainB. There was no rainC. To be no rainD. There being no rain4. Yesterday a street-beggar bought a lottery ticket purposelessly, _____ hima millionaire overnight.A. makingB. makesC. to makeD. made5. In the face of the big fire in October in California, many people in the fire-stricken areas moved out _____.A. to escape burningB. to escape being burnedC. escaping burnedD. escaping from burning6. Taking this medicine, if _____, will of course do good to his health.A. continuedB. to continueC. continuesD. continuing7. The little boy still needs the _____ 20 dollars to do with some things _____.A. remaining; remained to be settledB. remaining; remaining to be settledC. remained; remained to settleD. remained; remaining to settle8. _____ his age, the little boy read quite well.A. ConsideringB. ConsideredC. ConsiderD. Having considered9. _____ from the appearance, it is very peaceful; but in fact, a war will break out soon.A. JudgedB. JudgingC. Having judgedD. To judge10. —Tom enjoys _____ basketball on Sunday afternoons, doesn’t he? —Yes, he does. But what his sister enjoys _____.A. to play; dancingB. playing; to danceC. to play; to danceD. playing; is to dance11. His letter, _____ to the wrong number, reached me late.A. having been addressedB. to have addressedC. to have been addressedD. being addressed12. The Space Shuttle Columbia broke into pieces over Texas as it returned tothe earth on February 1, 2003,_____ all seven astronauts aboard.A. having killedB. killingC. being killedD. killed13. There are lots of places of interest _____ in our city.A. needs repairingB. needing repairedC. needed repairingD. needing to be repaired14. — What caused the party to be put off? — _____ the invitations.A. Tom delayed sendingB. Tom’s delaying sendingC. Tom delaying to sendD. Tom delayed to send15. I was afraid _____ to my customers because I was afraid _____ them.A. of talking back; to loseB. of talking back; of losingC. to talk back; to loseD. to talk back; of losing16. Standing on the top of the hill, I would not do anything but _____ the flowing of the smog around me.A. enjoyB. enjoyingC. enjoyedD. to enjoy17. — Is Tom a good talker? — No, he never speaks to me other than _____ something?A. ask forB. to ask forC. asked forD. asking for18. I can’t get my car _____ on cold mornings, so I have to try _____ the radiator with some hot water.A. run; to fillB. running; fillingC. running; to fillD. ran; filling19. The drunken husband knocked against the table and sent the bowls _____ in all directions before he was sent _____ by his wife.A. flying; to sleepB. flying; sleepingC. to fly; to sleepingD. to fly; to sleep20. When we got back from the cinema, we found the lamp _____ but the door _____.A. being on; shutB. burning; shuttingC. burning; shutD. on; shutting21. We found the students seated at tables and had their eyes _____ on the scene of the launch of Shenzhou V spaceship.A. fixedB. fixC. fixingD. to fix22. A doctor can expect _____ at any hour of the day or night.A. callingB. to callC. being calledD. to be called23. The boy often gives a satisfactory answer to the teacher’s question, _____ just a minute. So he’s usually the teacher’s pet.A. thoughtB. having thoughtC. and to thinkD. thinking24. The policeman came up to the lonely house with the door ____, ____ there for a while and then entered it.A. open; to standB. opening; stoodC. open; stoodD. opened; standing25. _____ along the quiet road at forty miles an hour, and then an old man suddenly started to cross the road in front of me.A. DrivingB. I was drivingC. Having drivenD. When I was driving26. Mr. Smith was much surprised to find the watch he had had _____ was nowhere to be seen.A. repairingB. it repairedC. repairedD. to be repaired27. What did the librarian _____ out of the library?A. permit to takeB. forbid to be takenC. allow to takeD. insist being taken28. — Mum, why do you give me so much popcorn? — _____ the boring time.A. KillB. KillingC. To killD. Having killed29. What Yang Liwei wanted to do when he got out of the spaceship was __ the joy with all the Chinese.A. shareB. sharedC. having sharedD. about to share30. When she was alone at home, Mary needed a friend _____.A. playing withB. having played withC. with whom to play withD. with whom to play31. _____ the big snake, the little girl stood under the tree _____ out of life.A. Seeing; frightenedB. Seeing; frighteningC. Seen; frightenedD. To see; frightening32. The competitor never dreamed of _____ for him to win the first prize in the 100-meter race.A. there was a chanceB. there being a chanceC. it being a chanceD. it was a chance33. _____ everything to go wrong in advance, and you won’t feel quite so bad when it does.A. Having expectedB. ExpectC. To expectD. Expecting34. — You _____ part in the party on time. — Sorry, I was delayed by the accident.A. are to takeB. have supposed to takeC. were to have takenD. supposed to take 35. _____ with the size of the whole earth, the highest mountain doesn’t seem high at all.A. When comparedB. To compareC. While comparingD. It compared36. _____ in her best suit, the girl tried to make herself _____ at the party.A. Dressed; noticedB. Dressing; noticingC. Dressed; noticingD. Dressing; noticed37. The matter _____ your study surely requires _____ carefully.A. relating to; dealing withB. related to; dealt withC. related to; being dealt withD. relating to; having dealt with38. _____ made her parents worried a lot.A. Her not to come backB. Not her to come backC. Her not coming backD. Not her coming back39. Everything _____ into consideration, they believed themselves more and returned to their positions.A. to takeB. takenC. to be takenD. taking40. He moved away from his parents and missed them _____ enjoy the exciting life in New York.A. much so as toB. very much toC. too much toD. enough to41. — What do you think of the plan? —It’s easier said than _____.A. carried outB. carrying outC. carry outD. to carry out42. Many businessmen attended the Boao Forum (博鳌论坛)because they knew what _____ from the forum.A. to getB. to be gotC. gotD. getting43. There was a famous person at the party whom everyone would like _____to themselves. A. to introduce B. to be introduced C. introducingD. being introduced44. — Were you at home last Sunday? — Yeah! I devoted the whole day to _____ the English grammar.A. reviewB. reviewingC. be reviewedD. being reviewed45. Once _____ at the shop, you will be dismissed immediately.A. caught stealingB. caught to stealC. catching stealingD. to catch to steal46. Prices of daily goods _____ through a computer can be lower than store prices.A. are boughtB. boughtC. been boughtD. buying47. _____, John returned to school from his hometown.A. The summer vacation being overB. The summer vacation is overC. Because the summer vacation overD. After the summer vacation being over48. _____ she can’t come, who will do the work?A. SupposedB. SupposingC. Having supposedD. Being supposed。

动词不定式用法讲解

动词不定式的用法解说一、动词不定式：组成：to+ 动词原形（to不过不定式符号，没存心义）动词不定式作主语较长时，常用it 作形式主语，而将真实的主语放在句末。

+is/was+ 形容词+(forsb.)+ 动词不定式TolearnEnglishwell isuseful.=It ’suseful tolearnEnglishwell. 学好英语是实用的。

Toprotectenvironment isimportantforus.=It’simportant forus toprotectenvironment. 关于我们来说保护环境是很重要的。

2.Itis/was+kind/good/nice/clever+ofsb.+ 动词不定式It’sverykindofyou tohelpme. 你帮助我真是太好啦。

It’sverycleverofyou todolikethat . 你那样做真的太聪慧啦。

3.It takes(took,will take)sb.sometimetodosomething.(做某事花销某人时间 )isagoodideatodosth.作宾语常有的跟不定式作宾语的动词有：wanttodosth.decidetodosth.hopetodosth.plantodosth.offertodosth.agreetodosth.learntodosth trytodosth prefertodosthpromise todosth.needto dosth.expect todosth.2.主语+find/think+it+形容词+(forsb.)+todoIfindi teasytoreadEnglisheveryday.我发现每日读英语和简单的。

Hefelt ithardtosleep.他感觉很难入眠。

Ithinkitveryint erestingtolearnEnglish.我以为学英语很风趣。

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