最新中考英语动词不定式考点全攻略(附答案)

一、to do不定式(一)含义1. 由“to＋动词原形”构成，是非谓语动词的一种。

2. 在句子中不能单独作谓语，也没有人称和数的变化，其否定结构是“not to do”3. 在句子中可以作主语、宾语、定语、状语、补足语、表语等。

(二) 用法1. 动词不定式作主语。

动词不定式作主语可以放在后面，而用it作形式主语放在原主语的位置上。

eg: To master a language is not an easy thing.掌握一门语言不是一件容易的事情。

It’s necessary to find the witness.有必要找到目击者。

2.动词不定式作表语, 通常是对系动词前面的名词进行解释说明。

结构：be + to do 作表语eg: My dream is to be a doctor .His work is to feed the animals.3. 动词不定式作定语。

动词不定式作定语，要放在它所修饰的名词或代词的后面。

eg: I have nothing to say on this question.对这个问题我无可奉告。

4. 动词不定式作状语。

(1)放在句首也可以放在句尾表示目的等。

(2)跟在作表语的形容词或过去分词的后面。

(3)用在too…to…结构中。

eg: He stopped to have a rest. 他停下来休息。

He is too young to understand all that.他太年轻了，不能理解这件事情。

5. 动词不定式作宾语补足语结构：动词+ sb. + to do sth.允许某人做某事________________________________要求某人做某事________________________________鼓励某人做某事________________________________期待某人做某事________________________________邀请某人做某事________________________________教某人做某事________________________________告诉某人做某事________________________________想要某人做某事________________________________警告某人做某事________________________________希望某人做某事________________________________二、课后练习(一) 用括号内所给单词的正确形式填空。

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.2.The head teacher said it was necessary to talk with his mother.3.How to learn English well is important.4.T o 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：1.T he best way is to join an English club.2.T he 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。

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。

动词不定式归纳定义：不定式的to和介词to需要被区分开，不定式的to后接动词原形，介词to后接名词、代词或动名词。

不定式作动词宾语He decided to invite all of his classmates to attend the holiday at the beach. 不定式作宾语He promised not to tell anyone about it.如果宾语有自己的补语，则常用it作形式宾语，而把真正作宾语的不定式放在后面放在后面，常带有形式宾语的动词有：believe. Consider. Feel. Find. Know. Make . regard例：we think it important to obey the laws. √we think to obey the laws is important. ×I know it impossible to finish so much homework in a day.不定式作介词宾语当介词but、except、besides前面有行为动词do及其各种形式时，介词后面的不定式可以省略to，否则不省略。

What do you like to do besides play football？We have no choice but to wait.个别介词可以用“疑问词+不定式”作宾语The boy has him own idea of how to finish it.不定式起形容词作用作定语不定式作定语用来修饰名词或代词，置于它所修饰的词后，而且放在其他后置定语的后面。

同时与它所修饰的名词或代词形成逻辑上的动宾关系或主谓关系。

He always has a lot of meetings to attend. 不定式to attend 和名词meetings 形成动宾关系The next train to arrive was from Seattle. To arrive 和train形成主谓关系Do you have anything interesting to read?如果作定语用的不定式是不及物动词，就要加上介词，使被修饰的这个词成为这个介词的逻辑宾语。

动词不定式知识点详解（初中英语专项复习）考点1. 动词不定式作宾语（1）在动词want，hope，would like，decide，wish，choose，try，need等后常用动词不定式作宾语。

（2）think，find，feel，make后连接it + adj. + to do sth.構成“形式宾语+真实宾语”的用法。

考点2. 动词不定式作宾补（1）带to的不定式作宾补的动词有：ask，like，would like，teach，tell，want，help 等。

（2）省掉to的不定式作宾补的动词有：let，make，hear，see，notice，have，watch 等。

注：省掉to的不定式的句子变被动语态时，需要还原to。

考点3. 动词不定式作主语（1）动词不定式常用作句子的主语时，谓语动词用单数形式：To do sth. +谓语动词+adj. / n.。

（2）常用it作形式主语，而将不定式放在句子后面：It +谓语动词+adj. / n.+ to do sth.。

考点4. 动词不定式作定语（1）及物动词不定式作定语放在被修饰词之后：名词或代词+to do。

（2）若构成的不定式的动词为不及物动词时，其后加上相应的介词：名词或代词+to do （介词）。

考点5. 动词不定式与疑问词连用（特殊疑问词+动词不定式）在宾语从句中，若主从句的主语一致时，宾语从句可简化为“疑问词+to do sth.”，不定式可以和疑问代词（who，whom，whose，what，which）或疑问副词（when，where，how，why）连用构成不定式短语。

它们可以在句中作主语、宾语和表语。

巧记常见动词：学会忘记有难处（learn，forget）想知道就别来劝告（wonder，know，advise）展开讨论教人对付（show，discuss，teach）弄清楚才决定告诉（find out，decide，tell）When to start is not decided yet. 还没决定什么时候开始。

中考英语动词不定式知识归纳总结·最新一、定义①动词不定式结构为“to＋动词原形”，其中to是动词不定式的符号，称为小品词；②动词不定式没有人称和数的变化；③在句子中可以用作主语、表语、宾语、补足语、定语、状语。

二、功能1. 作主语（1）e.g.To be a doctor is hard.To learn English well is not easy.如果要想引出动词不定式的动作是谁做的，可以在动词不定式前面加介词for/of引导的短语，称为不定式的复合结构。

例：e.g. It’s good for us to read English aloud in the morning.It is kind of you to help us so much.（2）动词不定式作主语时，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－－动词不定式放在句子的后部。

e.g. It is hard to be a doctor.It is not easy to learn English well.It’s important to plant trees in spring.2. 作表语e.g. His work is to drive a car.My job is to feed animals.Her ambition is to be a doctor.To see is to believe.Seeing is believing.What we had to do is find another person to help us.（前有do后省to）3. 作宾语⑴只能接不定式做宾语的动词：plan, offer, afford, seem, appear, care, volunteer, arrange, dream, trouble, expect, happen, beg; try/do one's best, go all out, give sb. a hand, have no choice but, make up one's mind巧记：三个希望（hope、wish、long）两答应(agree、promise)，两个要求（ask、want）莫拒绝（refuse），设法（manage）学会（learn）做决定（decide/determine），不要（fail）假装（pretend）在选择（choose）。

动词不定式( 原创作者：Cathy)动词不定式：to +动词原形否定形式＂not +to +动词原形＂1.作宾语：eg. She wants to buy a new coat. I hope to be back soon.常见动词有：want , like, wish, hate, prefer, hope,try,ask, start, forget,mean, begin, dicide, learn,…2.作宾语补足语：eg. Tell him to come quickly.Please tell him to call me tomorrow.常见动词有: ask , tell, get, allow, help, wish, want, like, hate, prefer, order, warn, would like…(省略ｔｏ不定式make , let, have ,see hear ,watch, notice, feel…eg. She made the baby stop crying.) (help 之后的不定式符号to 省不省略都可以)3.作状语。

①表目的ter he left home to work in different cities.She came here to help us.②表原因I’m sorry to hear the news.③表结果You’re too young to go to school. He is old enough to go to school.4.作主语eg.To watch the children play is what he likes.To study English well for us is important.不定式作主语时，常用it代替不定时作形式主语，I t’s important for us to study E nglish well.5. 作表语eg.His job is to sell computers.6.作定语①与被修饰的词有动宾关系I have a lot of homework to do .②与被修饰的词有主谓关系He is always the first to come and the last to leave.*不定式后的动词为不及物动词时，其后介词不能省略We had only a cold room to live in.I want a pen to write with.不定式短语：1.不定式加宾语或状语He is old enough to join the army. The teacher told us to sit down.2.for sb. +不定式It’s easy for the artist to draw a horse in five minutes.3.特殊疑问词＋不定式The question is where to find him.注：不定式中动词的省略．在简略回答中，或为了避免重复，不定式中的动词常被省略．--Would you like to get a cup of tea for me? --I’d like to (get a c up of tea for you)--Will you please help me with my English? --I’m glad to (help you with your English)Practice1.It is hard for her ___a bird. A.catch B.to catch C.catching D.catches2.The old woman is __old __carry the big box. A.so, that B.too, to C.such, that D.not, but3.The policeman told the children __in the street. A.not to play B.not play C.to play not D.play not4.The noise of moving cars made us __sick. A.to feel B.feeling C.felt D.feel5.You’d better __your coat .It’s cold outside. A.put on B.to put on C.putting on D.puts on6.The Frenchman didn’t know __this words in Chinese. A.how to tell B.how say C.how to say D.how talk7.I can’t decide __. A.to go with whom B.go with whom C.whom go with D.whom to go with8.I really don’t know __. A.what to do B.how to do C.what to do it D.how do it9.She has no paper__. A.to write B.to write on C.to write with D.for write10.Children usually have nothing __. A.to worry B.worrying about C.to worry about D.worried about11.He didn’t know __or stay. A.to leave B.whether to leave C.if to leave D.if that he should leave12.I usually forget __the door ,but I remembered __it when I left yesterday.A.closing, closingB.to close, to closeC.closing, to closeD.to close, closing13.It’s very nice__you __me the bike. A.for,lend B.of, to lend C.for, borrow D.of, to borrow14.It’s important __him __people’s lives. A. to,saving B. for,to save C. of,to save D for,to saving15.You’d better __early tomorrow. A.getting up B.to get up C.get up D.got up16. Why not __there by bus. A.go B.to go C.going D.goes17.-Would you like to go with us? -- Yes,__. A. I do B.I would C. I ‘d like D.I ‘d love to18.I want to find a room __. A. lived B.to live C.lliving D.to live in19.You must make the students __morning exercises everyday. A.doing B.to do C.do D.did20.The workers were made __over twelve hours a day. A.work B.working C.to work D.worked)21.I really don’t know __. A.to start out when B.when start out C.when will start out D.when to start out22.Do you find __easy to make friends with other people? A.this B.that C.it D.itsKEY: 1-5BBAD 6-10CDABC 11-15BDBBC 16-20ADDCC 21-22DC。

中考英语动词不定式及其用法讲解+练习1.动词不定式的基本概念：动词不定式的基本形式是“to+动词原形”，有时可以不带to。

动词不定式没有人称和数的变化，在句中不能做谓语，但可以有自己的宾语和状语。

动词不定式跟它的宾语和状语构成了不定式短语，例如：to read the book, to speak at the meeting等。

2.动词不定式的用法：动词不定式具有名词，形容词和副词的特性，因此可在句中作主语，表语，宾语，宾语补足语，状语和定语。

句子用法：作主语：eg:1)To take part in sports is important.2)To see is to believe.动词不定式做主语时常常由it来代替它，做形式主语，而动词不定式放在句末。

eg: It’s great to see you again.It is important to learn English well.It was rewarding to take part in this exchange programmeIt will take us a month to go on study trip to New York.It is necessary for governments to control the population growth.做表语：eg：The best way is to pratice.My dream is either to be a diplomat or to be a teacher of English .A popular use of the computer is to send a e-mail.Her wish is to become a famous star.The best way is to read the play before you see it.做宾语：eg: We are talking about how to solve the problem.I think it not difficult to keep reading English every morning.做宾补：eg: We all expect him to win the contest.Our teacher told us to listen carefully in class.注意：感官动词，或使役动词+宾语+无to的不定式Is Jack in the library ?Maybe I saw him go out with some books just now.Let those in need understand that we will go all out to help them.做定语：Liu Yang is the Chinese woman astronaut to enter the space.You are the last one to win the price.In the future , human will have less work to do.Why don’t you go out to play Rose?I’m afraid I can’t . I have a lot of homework to do.做状语：动词不定式做状语可以修饰动词，一般在句中做原因，目的和结果状语，动词不定式做状语可单独放在句首，句中或句末。

中考英语语法动词不定式知识点以下是中考英语语法中常见的动词不定式知识点：1.动词不定式的结构：- to + 动词原形：例如 to eat, to sleep。

- 动词原形：用于口语中，或在一些情况下省略 to，例如 Let me go。

2.动词不定式作主语：- It + be + 形容词 + to do：例如 It is important to study hard.- To do 表达强调：例如 To meet her is my dream.3.动词不定式作宾语：- 动词 + to do：例如 I want to play basketball.- 动词 + 不定式，如希望 hope, plan, decide, promise等：例如 I hope to see you again.4.动词不定式作补语：- 动词 + 名词/形容词 + to do：例如 She is happy to help her friend.- 动词 + 不定式，如 want, wish, like, love, hate, prefer等：例如 I want you to clean your room.5.情态动词后接动词不定式：- can, could, may, might 后接动词不定式表达能力或可能性。

- must, have to, need to 后接动词不定式表达必要性或需要。

6.动词不定式的否定形式：- not + to do：例如 I decided not to go to the party.- 动词 + not to do：例如 She asked me not to tell anyone.7.动词不定式形式的变化：- 过去式：to do → to h ave done- 完成式：to do → to be done- 进行式：to do → to be doing以上只是动词不定式的一些基本知识点，但需要根据具体语境和句子结构进行灵活运用。

动词不定式知识点详解（初中英语专项复习）考向一动词不定式的结构和句法功能动词不定式的结构动词不定时的构成：不定式的基本形式为：to+动词原形，有时可以不用to，这里的to 是不定式符号，本身无词义，动词不定式的否定形式是not+（to+）动词原形。

肯定式：to + 动词原形It’s nice to meet you.(2)否定式：not to + 动词原形He told me not to leave this room(to是不定式符号，无意义，有时可以不带)动词不定式的句法功能不定式作主语动词不定式作主语时，常用it作形式主语，而将真正的主语放在句末其结构为：①It is +adj.+for/of sb.+(not)to do sth.意为＂做某事对某人来说是……＂。

①It takes sb.+some time+to do sth.意为＂做某事花费某人多长时间＂如：To learn English well is useful.→ It is useful to learn English well.It’s important for us to protect the environment.注意：在kind，good，nice，clever等表示人的品质的形容词后，不用for而用of。

如：It's very kind of you to help me. 你帮助我真是太好啦。

不定式作宾语有些谓语动词后只能用不定式作宾语，常见的这类词是表示命令、打算或希望的，如：would like, like, want, wish, hope, decide, plan, expect等。

如：Would you like to see a film this evening? 你今晚想去看电影吗？①在find, think后跟不定式作宾语时，常用it代替，而将真正的宾语放在后面。

如：I find it easy to read English every day.3.不定式作宾语补足语tell, ask, want, allow, warn, advise, invite, get, encourage后常跟动词不定式作宾语补足语。

中考动词不定式(to do)讲解+专练[附答案]在英语句子中,动词有两种。

一种是谓语动词,另一种是非谓语动词。

动词不定式就属于非谓语动词。

动词不定式没有人称、数和时态的变化。

不受主语人称和谓语动词的时态变化影响。

在句子中不能单独做谓语，但仍要保留动词的特点，既可以有自己的宾语和状语。

一.动词不定式的基本形式;不定式的基本形式是to+动词原形，to没有任何意义，不翻译。

不定式的否定形式在不定式前+not/never即可。

二.动词不定式的句法作用1.动词不定式作主语动词不定式可以用作句子中的主语，这时谓语动词要用单数。

Eg:To see is easy ，but to do is difficult.To ask him for help is necessary.To help poor people is our duty.★当动词不定式做主语时,如果带有宾语或状语,那么主语就会很长。

这时，常用it来代替不定式做形式主语,而将真正的主语---不定式,转移到谓语之后,以避免句子结构头重脚轻。

Eg:It is necessary to ask him for help.It is our duty to help poor people.It is not easy to master a foreign language.It took us two hours to get there by bike.★如果要说明不定式的动作是谁做的,不定式前要用for引起的短语。

常用结构是It be+adj+for sb+to do sth.翻译为“做某事对于某人来说是怎么样的？Eg:It is important for us to study English well.It is difficult for him to answer these questions.★如果某些表示人的品行的形容词,例kind,good,nice,wrong,careless,wise,foolish,polite,clever,right,unwise,stupid,thoughtful,rude,silly,impolite等等作表语时，不定式前要用of引起的短语。

概念:动词不定式由to+动词原形构成。

这里的to是不定式标志,没有词义。

不定式具有名词、形容词或副词的某些语法功能,又有动词的时态和语态的特点及作用。

可以做主语、宾语、宾语补足语、表语、定语、状语。

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＋b＋to doIt is difficult for us to finish for swriting the composition in aquarter of an hour。

在句型③中,常用表示客观情况的形容词,如：easy，difficult，hard,important，possible，impossible，comfortable，necessary,better; the first，the next,the last,the best,too much，too little，not enough④It＋be＋形容词＋of sb＋to doIt is stupid of you to write down everything the teacher says.在句型④中,常用careless,clever，good,foolish,honest，kind，lazy，nice,right,silly,stupid,wise rude，clever,foolish，thoughtful, thoughtless（欠考虑的；不考虑的）,brave,considerate(考虑周到的)，selfish（自私的）等表示赞扬或批评的词。

2022中考英语语法考前梳理和提高（动词不定式）（解析）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！动词不定式的差不多形式是“to + 动词原形”，有时能够不带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，即能够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、形容词和副词的特点，因此在句子中能够作主语、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的情形: 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。

然而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能够和疑问词what ,which, how, where, when 等连用，构成不定式短语。

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。

一．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 sthIt 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。

第十二章动词不定式思维导图知识梳理一、不定式概述动词不定式的基本形式是:“t o+动词原形”,有时可以不带to.不带to的不定式与动词原形同形,但它不是原形,而是一种语法形式.除基本助动词do和情态动词外,英语动词都有不定式形式.动词不定式没有人称和数的变化,在句子中不能作谓语,但可以担任除谓语外的任何成分－主语、表语、宾语、定语、状语和宾语补足语.动词不定式和它的宾语或状语构成不定式短语.不定式有时态、语态变化(以do为例):主动语态被动语态一般式to do to be done进行式to be doing -完成式to have done to have been done 完成进行式to have been doing -(一)作主语用作主语的动词不定式通常表示一种具体的、特定的行为,其谓语动词用第三人称单数形式.To obey the laws is everyone's duty.服从法律是每个人的职责.How to use the computer is a question.怎么使用计算机是一个问题.How to get there is not decided yet.怎样去那里还没决定下来.点拨(1)在很多情况下,常用it作形式主语,而把真实主语不定式放在谓语之后.It was difficult to sell my car.我的车很难卖掉.It's not known where to stay for the night.在哪里过夜还不知道.(2)如果要表示不定式的动作是谁做的,一般在不定式前加一个for短语.It will be a regret for us not to help him.我们没有帮助他是个遗憾.(3)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,不定式前常可加一个以of引起的短语,来说明不定式指的是谁的情况.It would be rude of us to refuse their invitation.(我们)拒绝他们的邀请,会显得无礼.(二)作表语作表语,一般紧跟在系动词,如:be, seem, get等后面,用以说明主语.The question is when to start.问题是什么时候启程.You seem to have lost weight.你好像减肥了.What we have to do first is to find a solution.我们得做的第一件事是找出一个解决办法.点拨当不定式所作的表语仅用来说明主语的内容时,这个不定式只作单纯的表语,而不具有未来的含义.(三)作宾语能以不定式作宾语的动词很多,常见的有:agree, begin, decide, expect, forget, hope, learn, like, manage, pretend, start, try, want, wish等.Do you wish to see the manager?你想见经理吗?They decided to learn English hard.他们决定好好学英语.Don't forget to meet me at 6:00.别忘了六点钟和我见面.有些动词,如:tell, advise, show, teach, know, forget, learn , remember, show,understand, see, wonder, hear, find out, explain, decide, discuss等后面,常用带疑问词的不定式作宾语.We don't know who(whom)to ask.我们不知道问谁.We asked how to get to the station.我们问怎么到达车站.Have you decided where to go for your holidays?你们决定到哪儿度假了吗?I don't know whether to apply for the job or not?那份工作我不知道申请还是不申请?(四)作定语I have no time to waste.我没有时间可浪费.Let me find a place to park.我来找个停车的地方.He is always the first to come to work and the last to leave.他总是第一个来上班,最后一个走.点拨不定式修饰something, anything, nothing时,放在它们的后面.如果something, anything, nothing 有形容词来修饰,词序是something(nothing...)+形容词＋不定式.My father had something to do.我父亲有事要办.Have you got anything important to buy?你有什么重要的东西要买吗?(五)作状语不定式常可用作状语,修饰动词,表示行为的目的、结果、原因等.一般放在被修饰词之后,但在表示目的时,为了强调也可放在句首.1.作目的状语为加强语气在否定式前还可加上in order或so as组成词组(即:in order to...,so as to...),作状语表示目的.To live a long and healthy life, we must learn to have a balanced diet.为了能过长寿而健康的生活,我们必须懂得吃均衡的食品.I stayed there so as to see what would happen.我留在那儿,为的是想看看会发生什么事.In order to help him, we would do everything we can.为了帮助他,我们愿意尽一切力量.2.作结果状语表结果,其逻辑主语通常亦是全句的主语.在“so...as to...”“such...as to..“enough to...”“only to...”以及“too...to...”等结构中的不定式皆表示结果.She is old enough to go to school.她已到了可以上学的年龄了.He was too drunk to drive home.他酩酊大醉,没法开车回家.3.作原因状语She trembled to think of the terrible accident.想到那可怕的车祸,她就不寒而栗.We jumped with joy to hear the news.听到这消息,我们都高兴地跳了起来.(六)宾语补足语1、有很多动词的后面都可以有不定式作宾语补足语常见的这类动词有:advise, ask, tell, help, wish, want, expect, forbid, persuade, press, request, teach, warn等.She asked her grandfather to play game with her.她请爷爷跟她一起做游戏.Mother told me to cook the meal.妈妈叫我做饭.2.有一些动词后用作宾语补足语的不定式通常不带to,这种动词有两类:一类是感觉动词,另一类是使役动词感觉动词:如feel, see, hear, watch, notice等.使役动词:如make, let, have等.Let me do it for you.让我来替你做.Don't let her go out.别让她出去.I made him work hard.我迫使他加劲干.(1)动词help之后,复合宾语中的不定式可带to,亦可不带to.在上述动词转换为被动结构时,其后的不定式必须带to.He was seen to enter the theatre.有人看见他走进了剧院.I was made to do my homework the whole night.我被迫整晚做作业.Can you help me (to) move this table?你能帮我移动一下这张桌子吗?(2)感官动词的宾语补足语有两种形式:不带to的不定式和动词-ing形式.I heard Meimei singing in her room when I went past.我路过的时候听见梅梅在房间里唱歌.(路过的瞬间正在唱,所以用singing)We often hear Meimei sing in her room.我们经常听见梅梅在房间里唱歌.(经常听见,用不定式)I saw him come in.I saw him coming in.两句话的意思都一样:我看见他进来.用不定式着重于动作的全过程,用动词-ing形式则是强调当时动作的进行情况.3.当谓语动词为think, make, find, consider, feel, regard等词,作宾语的不定式后面有宾语补足语时,常用it作形式宾语,而将真正的宾语放在补足语的后面I find it easy to learn English well.我发现要把英语学好很容易.三、不定式的主要句型及注意事项(一)不定式的否定式不定式的否定式:not+不定式,经常和ask(tell)sb. to do sth.句型连用.She asked me not to drive him to the station.她要我不要开车送他到车站.Try not to be late.争取不要迟到.Mary asked me not to give my pen to Jimmy.玛丽让我别把笔给吉米.She decided not to come here again.她决定不再到这儿来.点拨不定式的否定式和否定句的区别:I asked him not to open the door.我让他别把门打开.I didn't ask him to open the door.我没让他把门打开.(二)不定式的进行时态进行式:表示在谓语动词所表示的动作或状态发生时正在进行.It's nice to be sitting here with you.在这儿陪你坐着是非常愉快的.It is unwise for him to be talking that topic all the time.他老是谈论这件事,很不明智.(三)不定式的完成时态完成式表示在谓语动词的动作或状态发生时已经完成.She said she was sorry to have missed you.她说她没见到你很遗憾.He seemed to have visited our factory.他好像参观过我们的工厂.They appeared to have met before.他们看来以前见过面.(四)动词不定式的被动语态表示被动意义I didn't want to be told about it.我不想被告知这件事.Nothing seems to have been forgotten.似乎什么也没有被遗忘.The building is said to have been destroyed in a fire two years ago.据说这幢大楼两年前已毁于一场大火.在以某些形容词,如kind, good, silly, honest, bad, stupid, bold, clever, cruel,courteous, nice, rude, sensible, tactful, wise, wrong等作表语时,后面需用以“of+名词(或代词宾格)＋不定式”结构,以说明不定式所表示的动作的执行者是谁(即of短语是不定式的逻辑主语).It's very good of you to come.谢谢你的光临.How silly of you (it is)to make such a mistake!你出了这样的差错,多傻啊！It's very kind of you to say so.多谢你这么说.在had better, had best, would rather, would rather...than, would sooner, would sooner...than, cannot but, do nothing but等结构后面的不定式要省略“to”.You had better write it in English.你最好用英文写.I would rather stay at home.我宁愿待在家里.好题精练一、用-ing形式或不定式的适当形式完成句子1.Do you enjoy_________ football?(play)2.Fred didn't have any money, so he decided_________ a job.(take)3.We're going out for dinner, Would you like_________ us?(join)4.The teacher reminded the students_________ their test paper on time.(finish)5.When I was tired, I enjoyed_________ TV.(watch)6.It was a nice day, so the old man agreed_________ for a walk.(go)7.I'm not in a hurry, I don't mind_________.(wait)答案:1.playing2.to take3.to join4.to finish5.watching6.to go7.waiting二、选择括号内所给词组完成句子,注意括号内“go+v.-ing形式”构成固定搭配的用法(go boating; go fishing; go dancing; go running; go skating; go hunting; go singing)1.She's a good dancer. She always_________ on Saturday.2.I've got a gun. I'll_________ with that strong hunter next weekend.3.“Where is Tim?”“He has. _________ He always runs in the morning.”4.We have enough fish to eat. Our father_________ every day.答案:1.goes dancing2.go hunting3.gone running4.goes fishing三、仿照示例改写下列句子示例:It is very interesting to play baseball.→ To play baseball is very interesting.1.lt was not polite to speak that way before Mr. Lee.___________________________________________________________________________________________ _2.It can be quite easy to travel by air.___________________________________________________________________________________________ _3.lt will be no problem to arrive there before noon.___________________________________________________________________________________________ _4.To make those strangers believe us was so difficult.___________________________________________________________________________________________ _5.To help Tom speak Chinese well is not at all easy.___________________________________________________________________________________________ _答案:1.To speak that way before Mr. Lee was not polite.2.To travel by air can be quite easy.3.To arrive there before noon will be no problem.4.It was so difficult to make those strangers believe us.5.It is not at all easy to help Tom (to) speak Chinese well.四、选择填空1. _________ the bookstore, he stopped_________ a few books.A. Passing; buyingB. Passing; to buyC. To pass; buyingD. Having passed; to buy2.Bruce,look at your dirty shoes, You'd better_________ them right now.A. washedB. washingC. washD. to wash3. _________ the room, I found the computer_________.A. Entering; stealingB. Entering; stolenC. To enter; stealD. To enter; stealing4.We've worked hard for nearly one hour. Let's stop_________ a rest now.A. haveB. to haveC. havingD. have had5.My mother always tells me not_________ to the net bars(网吧)．A. goB. to goC. goesD. going6.The teacher asked us_________ English for half an hour in the morning.A. reads B reading C. to read D. read7.You will have to get up early tomorrow. Stop_________ TV, Peter.A. watchesB. watchC. to watchD. watching8.I find it hard_________ English well.A. learnB. learningC. to learnD. learns9.The teacher asked John_________ a short talk in our class meeting.A. giveB. to giveC. gaveD. giving10.The girl was too poor_________ a houseA. to buy; to live inB. to buy ;to liveC. buy; to liveD. buying; living in11.It was very late at night, but Mr. Brown still went on_________.A. works B .worked C. working D. work12.Remember_________ him about it before he goes away.A. tellB. to tellC. tellingD. to telling13.Lin Tao is strong enough_________ the big box.A. carryB. to carryC. carryingD. carries14.Her mother told her_________ in bed.A. not readB. not to readC. don't readD. to not read15.When class began, we stopped_________ to the teacher carefully.A. listeningB. listenC. listens D .to listen16.You'd better_________ the cinema by bus.A. don't goB. to goC. to go toD. go to17.What did the manager_________ you to_________ at the meeting?A. tell; sayB. ask; speakC. tell; speakD. ask; talk18.Tom was let_________ in the gate house.A. waitB. to waitC. waitingD. to have waited19.Mr.Hu has enough time_________ the job in two days.A. finishB. to finishC. finishingD. finished20.Look,the building_________ is our library.A. is repairedB. being repairedC. repairingD. to be repairing21. _________ no money, I could not buy this coat.A. HaveB. HavingC. To haveD. Have had22.The teacher has something important_________ us.A. to tellB. tellsC. tellingD. told23.Li Ming didn't know_________ next.A. to do whatB. what to doC. how to doD. what do24.I'd love_________ to your birthday party.A. comeB. cameC. to comeD. comes25.It took me two hours_________ by bus.A. to get thereB. to get to thereC. get thereD. get to there答案:1-5BCBBB 6-10CDCBA11-15CBBBD 16-20DABBB21-25 BABCA五、改正下列句子的错误1.He seems to not hear from her.___________________________________________________________________________________________ _2.I hope see you soon.___________________________________________________________________________________________ _3.I made them to give the money back.___________________________________________________________________________________________ _4.The scientist gave us some advice on how learning English.___________________________________________________________________________________________ _5.No one noticed him to leave the room.___________________________________________________________________________________________ _6.Have you given up to smoke?___________________________________________________________________________________________ _7.We found him waited at the school gate.___________________________________________________________________________________________ _8.Why not to turn off the light?___________________________________________________________________________________________ _9.She didn't want me go.___________________________________________________________________________________________ _10.I don't know to swim.___________________________________________________________________________________________ _11.China is a developed country belonging to the third world.___________________________________________________________________________________________ _12.It's getting dark. We have to find a hotel to live.___________________________________________________________________________________________ _13.He said he had an important meeting to attended.___________________________________________________________________________________________ _14.They don't allow that people smoke.___________________________________________________________________________________________ _15.It's difficult sell my car.___________________________________________________________________________________________ _答案:1.He seems not to...2.I hope to see...3.I made them give...4....how to learn...5....him leave...6....given up smoking?7...him waiting...8.Why not turn off...9.She didn't want me to go.10.I don't know how to swim.11....a developing...12....to live in13....to attend.14. ...people to smoke.15...to sell my car.。