动词不定式专项练习 （一）选择 1. The policeman told the little boy _____ football in the street. It’s dangerous. A. not play B. not playing C. not to play D. to play 2. Martin looks so well. We’ve never seen him ______ so well before. A. is looked B. is looking C. to look D. look 3. They preferred ______ in bed rather than ___ horses. A. to lie; to ride B. lying; riding C. to lie; ride D. lying; ride 4. —What do you think of tomorrow’s football match? — ______difficult for us ______ the match. A. We’re; to win B. We’re; winning C. It’s; to win D. It’s; winning 5. — Hi, Peter. Why are you in such a hurry? — ______the 7:30 train. A. Catch B. To catch C. Catching D. Caught 6. Don’t forget _________ the letter. A. to send B. send C. sending D. being sent 7. 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 8. Is ______ necessary to return the book tomorrow? A. this B. that C. it D. which 9. I’m afraid they would not allow him ________ here. A. to smoke B. smoking C. smokes D. smoke 10. Mother told me ________ the water before I drank it. A. boiling B. boiled C. boil D. to boil 11. On my way home, I stopped _______ some food. A. buy B. to buy C. buying D. bought 12. John was made _______ the car for a week as a punishment. A. to wash B. washing C. wash D. to be washing
非謂语动词（一） 一、Done 被动性：过去分词的逻辑主语是分词动作的承受者（receiver）, 而不是发出者，两者构成被动语态或被动意义。 完成性：与句中另一个动作、另一个时间或句子产生的时间相比，分词的动作已经发生、完成。 句法功能 表语：许多动词通过+ed 变成形容词，其本质是过去分词用作形容词The boys were astonished. The door remained locked. They seemed worried. 定语：划出下列句子的定语部分 The broken glass is still lying on the table. The frightened girl was trembling when the police arrived. A grown boy is a boy who has physically and mentally grown up. He sent them his newly-invented devices. She was reading a novel written by Dickens. The people trapped in the big fire were rescued by the firefighters with a helicopter. The radio bought in your shop doesn't work well. 翻译： 他是被经理测试的人员当中最优秀的员工之一。 宾补 1、在感官/ 感知动词后：see, look at, observe, hear, listen to, think, find, imagine, feel, watch等。 We found him greatly changed. 2、在使役动词后：make, have, get, keep, leave等。 He made himself understood in spoken English. 3、在意愿动词后：like, need, want, wish等。 She came into the shop with a package saying: I needn’t it changed but re-wrapped. 翻译：我回到家，发现家里被偷了
高中动词不定式用法讲解及练习
Grammar Presentation---动词不定式 一、不定式的句法功能 ●不定式作主语 ?To learn a foreign language is not easy.学习外语不是一件容易的事。 ◎不定式短语作主语时，常用it作形式主语来代替它的位置，而将真正的主语（不定式短语）移到谓语之后 ?It’s a great honor to be invited to Mary’s birthday party.很荣幸被邀请参加玛丽的生日聚会。 ●不定式作宾语 ◎作动词宾语 ◇下列动词常接不定式作宾语，如：agree, arrange, ask, beg, choose, dare, decide, demand,expect, fail, fear, hope, manage, offer, plan, prepare, pretend, promise, ?They hope to find new resources for mankind.他们希望为人类找到新资源。 ◇如果不定式作宾语且有自己的补语，常用“it”作形式宾语，而把真正的宾语放在后面。 下列动词常用it作形式宾语，如：believe, consider, feel, find, know, make ?I know it impossible to finish so much homework in one day. 我知道在一天中完成这么多的作业是不可能的。 ●不定式作表语 ◎不定式作表语时，一般紧跟在系动词后，说明主语的内容 ?The first step is to check the victim’s breathing.
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）
动词不定式专项训练 A. to solve B. to be solve C. being solved D. solving A. for her to return B. that she must return C. her returning D. of him to return A. costs... to get B. costs... getting C. takes... to get D. takes... getting A. to explain B. to have been explained C. to be explained D. to be explaining A. to learn B. to be learning C. to have learned D. to have been learning Keys: 1-5 A A C C C
专项练习 1.The flu is believed_______ by viruses that like to reproduce in the cells inside the human nose and throat. A. causing B. being caused C. to be caused D. to have been caused 2.There is a new problem involved in the popularity of private cars road conditions need A. that. .. to be improved B. which ... to be improved C. where. . . to be improving D. when.. . improving 3.Remember_________the magazine when you have finished reading it. A. putting back B. having put back
非谓语动词 非谓语动词的概念: 在句子中不能做谓语的动词形式叫做非谓语动词. 它不受人称和数的限制. 非谓语动词分为三种形式: 不定式：to do 动名词：v-ing 用做名词 分词（现在分词doing和过去分词V-ed）（高考） 考点一：不定式 1.不定式的基本形式是to＋动词原形，它具有动词的特点，即可以有自己的宾语和状语，但它没有人称与数的变化，在句中也不能作谓语，动词不定式和自己的宾语和状语构成不定式短语。 动词不定式的基本形式为：to+动词原形（不定式符号to有时可以省略）；其否定形式为：not to+动词原形。如：My father asked me not to read in bed. ) 2.不定式的句法作用动词不定式具有名词、形容词和副词的作用，它可以作主语、宾语、宾补和状语。 (1)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， It＋be＋形容词＋(for sb)＋动词不定式。 It's important (for us) to protect environment. 注: kind，good，nice，clever等表示人的品质的形容词后，不用for而用of。 It's very kind of you to help me. (2)作宾语 He wants to go out with her. 注:①一些谓语动词后只能用不定式作宾语，常见的这类词表示命令、打算或希望，如：would like，want，wish，hope，decide，plan，expect，pretend等。 ？
Would you like to see a film this evening ②当不定式作宾语时，通常还可以用it作形式宾语，真正的宾语是不定式。 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句末。 I find it easy to read English every day. (3)作表语 句型：主语+ be + to do sth . 如：My group’s task is to find out the cost to go by train. （4）作目的状语 > 如：He opened the door for her to come in. 他打开门让她进来。 I get up early to catch the first bus.我早起为了赶上首班车。 (5)作宾语补足语 ①不能省略to： ask. tell . order . force. want. invite. expect . encourage . advise. teach . promise. warn. allow . remind . help. 如：Tina told her sister to turn down the TV.蒂娜让她姐姐把电视机的音量调小点。 My mother asks me not to read in the bed.我妈妈不让我在床上看书。
动词不定式（The Infinitive） 一、概述 不定式是动词的一种非谓语形式，在句中不能单独作谓语。它有两种形式：（1）带to的不定式；（2）不带to的不定式（即通常所说的动词原形），它可以和助动词或情态动词构成谓语。不定式既有动词性质，又有名词性质。 1）不等式具有动词性质，即它有时态和语态的变化；可有自己的宾语或状语并构成不等式短语。如： Would you like to tell me an interesting story? 你可不可以给我讲一个有趣的故事？（不等式to tell有自己的宾语me和story）He was too clever a man to be fooled.他这个人很机灵，不会被愚弄的。（不等式的被动语态） I’m going to go there by bike. 我想骑自行车去那儿。（不定式有状语there） They will set up more primary schools in the countryside. 他们将在乡村修建更多的小学。（不带to的不等式与助动词will一起构成谓语）但是，不等式没有人称和数的变化，即不受人称和单数、复数的限定或影响。 She likes to play the accordion. 她喜欢弹奏手风琴。 She liked to play the accordion when she was young. 她很小就喜欢弹奏手风琴。 2）不等式具有名词性质，即它在句中可用作主语、宾语、表语等。如： To see is to believe. 百闻不如一见。（作主语） This suit doesn’t seem to fit me.这件衣服似乎不适合我穿。（作表语） She wanted to see which shops offered the best service. 她想看看哪家商店提供最好的服务。（作宾语） There’s no need to be worried. 不需要担心。（作定语） He went there to see what would happen.他去那儿是想看看会出什么事。（作状语） 3）不等式虽然在语法上不能有主语，但它表示的动作，在意思上是可以有自己的主语，在语法上这个主语称为不等式的逻辑主语。这个逻辑主语可能是整个句子的主语、宾语等，也可以用一个由for引起的短语表示。如： His friends tried to encourage him. 他的朋友设法鼓励他。（不等式的逻辑主语His friends同时也是句子的主语） Every year, tobacco companies must persuade new people to start smoking cigarettes. 每年烟草公司要设法使一些比吸烟的人开始吸烟。（不等式的逻辑主语new people是句子的宾语）It’s very difficult for a foreigner to learn Chines e. 外国人学汉语是很不容易的。（不等式的逻辑主语由for引起的短语表示） 另外，不等式的否定形式一般在它的前面直接加not或never。 The teacher has told me many times not to come late again.老师多次告诉我不要再来晚了。 She seems not to have a bright time with her new friends.和新朋友在一起她似乎过得不是太好。 二、不定式的主要用法 动词不等式具有名词、形容词及副词的特征，因此在句中可作主语、宾语、宾语（或主语）补足语、表语、定语、及状语等。 1、不定式作主语 ①不等式作主语时，谓语动词用单数形式。 To conquer English is not easy. 征服英语不容易。 To make plan firs t is a good idea. 先制定计划是个好主意。 To know everything is to know nothing. 事事皆通，无一精通。 ②不等式作主语时，常常用形式主语it替代，而将真正的主语不等式放在句子的后面。 It is necessary to master a foreign language.掌握一门外语很有必要。 It’s a great pleasure to see you again.再次见到你真高兴。 It is a bad manner to stare at a foreign guest.盯着外宾看是一种不良的举动。 ③如果说明不等式表示的动作是谁做的，可以在不等式的前面加一个for引起的短语，这就是常见的“It is adj./n. for sb. to do sth.”句式。如： It is good manners for an Arab to stand close to his friends when they are talking. 对阿拉伯人来说，交谈时站得离朋友近些是好的礼貌。 It is a great honor for us to be presented at the party.我们能来参加晚会，深感荣幸。 It will be a regret for us not to help him. 我们没有帮助他是个遗憾。 ④在某些形容词（如kind, good, nice, wise, unwise, clever, silly, wrong, right, foolish, stupid, careless, considerate, rude, naughty, impolite等）作表语时，不等式前常加一个以of引起的短语，来说明不等式指的是谁的情况。这就是常见的 “It is adj. of sb to do sth.”句式。如：
非谓语动词讲解及练习 一、单项选择非谓语动词 1．In response to the citizens’ concern, the government claimed ______ measures to attend to the increasingly serious smog in the past two months. A．taking B．to take C．having taken D．to have taken 【答案】D 【解析】 【详解】 考查固定结构。句意：为了回应市民的担忧，政府声称在过去的两个月里已经采取措施来应对日益严重的雾霾。claim to do声称，该用法是固定用法，“过去的动作或状态持续到现在并且已经完成”用现在完成时，故选D。 2．115．______ his love, Chris sent his mom a thank-you note on Mother’s Day. A．Expressing B．Expressed C．To express D．Having expressed 【答案】C 【解析】考查动词不定式。句意：为了表达他的爱，克里斯在母亲节那天给他的妈妈寄了一条感谢信。用不定式表目的，故选C。 3．The airport ________ next year will help promote tourism in this area. A．being completed B．to be completed C．completed D．having been completed 【答案】B 【解析】 试题分析：考查非谓语动词。此处to be completed表将来、被动。句意：将于明年建成的机场会有助于促进这个地区的旅游业。 【名师点睛】这是考查非谓语动词做定语的用法，句中关键词next year说明动作是将要发生。而The airport和complete是被动关系，用不定式的被动做定语。 4．China’s image is improving steadily, with more countries ________ its role in international affairs. A．recognizing B．being recognized C．to be recognized D．recognized 【答案】A 【解析】 【详解】 考查with复合结构。句意：中国的形象正在稳步提升，更多的国家认识到中国在国际事务中的作用。“更多的国家”和“认识”之间是主动关系，用现在分词，故选A。 5．More TV programs, according to government officials, will be produced _____ people’s
非谓语动词 一、英语句子需要遵循一个总原则：一个句子只能有一个动词。当一个句子必须要出现两个或两个以上的动词才能完整 表达一个意思时，为了不违法总原则，英语有四种处理方式： 1. 切分成两个或者多个句子 She is a girl. She likes English 2. 将一个谓语动词做主句，其余动词改成从句 She is the girl who likes singing. 3. 添加and, but, or, when, because, not only..but also, either..or 等连词变成并列结构 She got off the bus, but left her handbag on her seat. 4. 将其中一个动词变成非谓语动词形式 She got off the bus, leaving her handbag on her seat. 二、非谓语动词使用条件：一个句子当中，已经存在一个主句（谓语动词），又没有连词(and,but,or等)的情况下， 还有别的动词出现时，这时就要用非谓语动词 三、非谓语除了不能做谓语外，其他成分都可以做 不定式（to do） 四、非谓语动词三种形式分词现在分词（doing） 过去分词( done ) 动名词(doing) 五、非谓语动词解题技巧： 1. 判断是不是用非谓语动词（1.看有没有逗号 2.看有没有谓语 3.看有没有连词。要牢记英语中逗号不能连接两个 句子，一个句子如果没有连词只能有一个谓语） 2. 判断是主语和动词是主动还是被动关系 3. 判断时间, 确定非谓语动词和主句动词谁先发生，谁后发生 不定式的用法 不定式构成一般式完成式进行式 主动关系to do to have done to be doing 被动关系to be done to have been done 不定式动词和谓语动词发生的时间关系不定式的动作和谓语动作同时发生， 或发生谓语动作之后 he seems to know a lot 不定式的动作发生在谓语动 作之前 I regretted to have told you a lie. 不定式的动作和谓语 动作同时发生 I’m glad to be talking with you 不定式否定形式在to前加not. 即not to..... 不定式充当的成分主语，宾语，表语，定语，状语，宾补
动词不定式专项练习 根据句意及所给的汉语提示完成下列句子。 1．I've come____________________（借词典）． 2．I'm very sorry____________________（麻烦你）． 3．He is too frightened____________________（不能动）． 4．The teacher asked us____________________（用英语说它）． 5．I'd like____________________（吃苹果）． 6．The policeman told the boys____________________（别在公路上玩耍）．7．His uncle will teach him____________________（唱歌和跳舞）． 8．You'd better____________________（别在阳光下看书）． 9．We often watch them____________________（（踢足球）． 10．Let's____________________（去散步），shallwe？ 11．Later he left home____________________（找）that lost watch． 12．He found it very difficult____________________（入睡）． 13．Why not____________________（去划船）？ 14．She often helps her mother____________________（做家务）．15．When you leave the room，please don't forget____________________（关掉）the light． 动词不定式作坊答案： 1．to borrow the dictionary 2．to trouble you 3．to move 4．to say it in English 5．to eat apples 6．notto play on the road 7．to sing and dance 8．not read in the sun 9．play football 10．go for a walk 11．to look for 12．to get to sleep 13．go boating 14．（to）do the housework 15．to turn off
人教版英语非谓语动词的用法大全及解析百度文库 一、非谓语动词 1．Young people are encouraged to work hard ____their own dreams. A. achieve B. achieves C. to achieve D. achieved 【答案】 C 【解析】【分析】句意：鼓励年轻人努力工作，实现自己的梦想。根据句意可知their own dreams是workhard的目的，常用动词不定式来表示目的，故选C。 【点评】考查动词不定式的基本用法——作目的状语。 2．Our teacher often advises us the habit of making notes while reading. A. to develop B. develop C. to developing D. developing 【答案】 A 【解析】【分析】考查非谓语动词。句意：我们的老师经常建议我们培养在阅读时做笔记的习惯。Advise sbto do sth建议某人做某事，所以选A。 3．—Julia, your mobile phone is ringing. —Wait a minute. It's dangerous ______ it while crossing the street. A. answering B. answer C. to answer 【答案】 C 【解析】【分析】句意：—-朱丽亚，你的手机响了。—等一下。过马路时接电话是危险的。It + be + adj. for （of） sb to do sth 某人做某事……，是固定句式，it是形式主语，不定式结构做真正主语。故选C。 【点评】考查动词不定式做主语的句式。熟记此句式，并能熟练运用。 4． Whenever we kids come over, Auntie Susan just stands there and watches us ________ sure we don't break anything. A. make B. made C. to make D. making 【答案】 C 【解析】【分析】句意：无论什么时候我们这些孩子们来到这里，Susan姨妈只是站在那里，看着我们以确保我们不打破什么东西。此处是目的状语，故用动词不定式to make。watch sb do/doing sth看着某人做了/正在做某事，但是make sure的意思是“保证；确保”，在本句中不符合逻辑，故排除AD；watch sth done看着某事被做，也不符合句意，故选
初中英语语法（动词不定式） 1．不定式的基本形式与结构 动词不定式指通常由to加上动词原形(如to write) 所构成的一种非限定性动 词形式，但在有些情况下to可以省略。动词不定式有进行体和完成体(如上to be writing，to have written)，也有被动态(如to be written)，所有的主动词，不论是 及物动词还是不及物动词，也不论是动作动词还是状态动词，都有不定式形式。 助动词除be和have外，没有不定式形式。动词不定式在语法功能上可作主语、 宾语、表语、定语和状语。 2．不定式的用法 1)不定式结构作主语 1.Te get contact with his family in Taiwan made him extremely happy since they separated more than 40 years ago． 2.To finish that task in such a short time is really a challenge． 在上述情况下，如果不定式较长，显得头重脚轻，则可由代词让作形式主语(形式主语it不可由that或this等其他代词代替)，而将不定式放到后面。如： 1.It made him extremely happy to get contact with his family in Taiwan since they separated more than 40 years ago． 2.John admitted that it is always difficult for him to be on time． 不定式结构所表示的动作是谁做的，即不定式的逻辑主语，通常可以通过for sb. to do sth. 结构表达： 1.It is quite important for us to read good books during a general review． 2.It is not difficult fot those talented students to pass the exam. 在某些形容词(如careless，clever，considerate，foolish，good，impolite，kind，naughty，nice，silly，stupid等)作表语时，不定式后可以加of来引导出其逻辑主语： 1.It is very kind of you to tell me the truth． 2.It is stupid of him to do such a silly thing． 2)不定式作宾语 不定式作宾语有两种：一种是及物动词后直接跟带to的不定式，另一种是“及物动词+疑问词+带to的不定式。 及物动词+带to的不定式结构: 只能跟动词不定式的动词，常见的有: afford，agree，aim，appear，ask，believe，care，claim，decide demand，desire，determine，expect，fail，happen，hesitate，hope，intend，learn，long，manage，offer，pretend，promise，prepare，refuse，seek，swear，undertake，want，wish等。 1.He managed to solve the complicated problem. 2.The stranger offered to show me the way. 3.Mr. Smith undertook to build a new plant in South Africa. 动词+疑问代(副)词+不定式： 这类动词常见的有advise，decide，find out，forget，inquire，know，learn，
---------------------------------------------------------------最新资料推荐------------------------------------------------------ 英语语法专项：动词不定式用法归纳及练习答案 动词不定式用法归纳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。 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．（Lesson 10）．点击规律：动词不定式在句中作主语时，常放在 It is ＋adj．（形容词）＋to do sth．或 It is ＋ n．（名词）＋to do sth．句型中，it 仅作形式主语。 2．作宾语 a.以下动词只能 to do 作宾语。 attempt 企图 enable 能够 neglect 忽视 afford 负担得起demand 要求 long 渴望 arrange 安排 mean 意欲，打算 begin 开始 expect 期望 appear 似乎，显得 determine 决定 manage 设法 cease 停止 hate 憎恨，厌恶 pretend 假装 ask 问 need 需要 1/ 7
非谓语动词复习 非谓语动词: a.动词不定式to do b.现在分词/ 动名词doing c.过去分词done 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 (有一个特殊情况：过去分词不具备名词性，所以补充当主语或宾语。）非谓语动词使用条件：一个简单句中有且只有一个谓语动词 一个句子当中，已经存在一个谓语动词, 又没有连词的情况下, 应使用非谓语动词。 She got off the bus, leaving her handbag on her seat. She got off the bus, but left her handbag on her seat. 所有的非谓语动词的否定都是在其前面加NOT 动词不定式 一．动词不定式的变体 动词不定式是非谓语动词的一种，由不定式符号(to)加动词原形构成。不 例如：He seemed to be reading something at that time. 例如：He seemed to have cleaned the room. 例如：The work is to be done soon. 例如：The boy is said to have been sent to hospital yesterday.
二. 动词不定式的用法 I.作主语 To see is to believe．Not to get there in time is your fault. 注：常用it做形式主语，将to do放在位于之后，使句子保持平衡。 It is a great enjoyment to spend our holiday in the mountains. 句型3：It is + adj + for sb to do sth（是形容事物的性质的）It is + adj + of sb to do sth（是形容人的品质的） It is easy for me to finish this work before ten. It's impolite of you to speak to the teacher like that. II.作宾语 接不定式做宾语I want to know this matter. (1)常见动词有：like, demand, expect, promise, begin, determine, refuse, offer, fail, manage, learn, seem, intend, forget, want, prepare, pretend, refuse, plan, afford, wish等 (2)it作形式宾语 I find/feel to work with him interesting ．I find/feel it interesting to work with him． 3. I feel it my duty to change all that. 2.We think it important to obey the law. 下列词接动名词和不定式均可，但意义不同的动词： stop to do 停下来去做stop doing 停止做
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。 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? 明天和我们一起去野餐好吗？