不定式的用法
不定式的用法
The road is hard
to Байду номын сангаасalk on
.
结果状语： too + adj \ adv + to do sth ( not ) + adj \ adv + enough to to sth He is too young to go to school . He is not old enough to go to school .
三 、宾补
1. ask sb to do sth 类似ask 的动词：tell , want , invite , wish , allow , teach, order … 他邀请我们去参加晚会。
He invited
us
to come to
the party .
我希望他们玩得 高兴。
I
wish them
基本形式：
肯定式：to do sth ( 有时可不带to ,称为省略to 的不定式，无人称，数的变化，不能单独作谓 语） 否定式：not to do sth 用法：不定式具有名词、形容词和副词的特征， 因此在句中可以作主语、表语、宾语、宾补、 定语和状语。
一 、主语
1.不定式做主语，谓语动词用单数
It’s our duty to look after you .
It’s a pity for us to miss the party .
3. It takes sb some time to do sth
二 、 宾语
want to do sth 类似want 的动词有： would like , hope , wish , like , love ,begin , start ,try , need , forget , remember , learn ,plan ,decide , refuse …
不定式的六种用法
不定式的六种用法1、不定式作主语例如：To remember this is very important.注意：为了避免头重脚轻，在许多情况下，通常都将作主语的不定式置于句子后部，而在句首主语位置使用形式主语it。
例如：It is very important to remember this.2、不定式作表语例如：He seems to be ill.注意：不定式作表语主要有三种情况，一是用于seem, appear, prove 等系动词之后的不定式（尤其是to be），二是像My job is to sweep the floor. 这样的主语与表语“等价”的情形，三是表示想法、约定、义务、命令、可能性、命运等，如：You are to come when I call.3、不定式作宾语例如：I can not afford to buy a car.注意：①不定式不仅用作动词的宾语，还可用作个别介词（but, except）的宾语。
例如：I had no choice but to wait.②当作宾语的不定式后跟有宾语补足语时，通常要用形式宾语it代替不定式，并将真正的宾语不定式置于宾语补足语之后例如：I find it difficult to learn Japanese well.4、不定式作宾语补足语例如：Who taught you to drive?5、不定式作定语例如：I have a question to ask you.注意：有的名词（如way, chance, right等）后用作不定式可换成of doing sth.如：It is the best way to do (of doing) it.但是以下名词后接不定式作定语时通常不能换成of doing sth. attempt courage decision effort fortune failure invitation wish6、不定式作状语例如：I went to France to learn French.。
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。
不定式的用法
不定式的用法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 these buildings 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 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 duty, an honor, a shame, a crime, no easy job...)＋不定式It is a pity to have to go without her.It is a glorious death to die for the people.c) It takes (sb.) some time (hours, months, days, a lot of time, patience...)＋不定式It takes me three hours to learn English each day.It took them half the night to get home in the snow.2)不定式作表语不定式作表语常表示将来的动作，主语常常是表示意向、打算、计划的词，如wish, idea, task, purpose, duty, job等。
非谓语动词(不定式)的用法
非谓语动词(不定式)的用法非谓语动词（动词不定式的具体用法）动词不定式有三大语法功能：1.充当名词，可作主语、宾语或表语；2.充当形容词，可作后置定语或宾语补足语；3.充当副词，可作状语。
构成不定式需要使用“to+动词原形”的形式，否定式则在不定式符号之前加入否定词“not/never”。
一、不定式作主语的用法不定式作主语的特点是具有名词的功能，可表示意愿或未完成的事情，谓语动词要用单数。
常见的此类名词有：plan（计划）、purpose（目的）、attempt（企图）、goal（目标）、aim（目的）、n（雄心）、dream（梦想）、ideal（理想）、wish（希望/愿望）、hope（希望）、n（决定）、n（决定）、proposal（提议/建议）等。
为了避免主语过长，不定式短语可放在句末，用形式主语“it”代替原来的主语位置，不定式则成为真正的主语。
例如：___.（赢得冠军是我的雄心。
）To master a foreign language is necessary.（掌握一门外语是有必要的。
）To e President of the United States used to be my goal.（过去我的梦想是成为美国总统。
）Speaking perfect English is always my dream.（说一口流利的英语一直是我的梦想。
）It is ___.（保护环境是有必要的。
）There are two special ___:1) It is + adj + of sb + to do sth.2) It is + adj + for sb + to do sth.___ characteristics and differences are:1) If ___ characteristics or traits。
the logical subject of the ___ "of."Examples:It is very affable of you to help me。
不定式的用法总结
My brother asked me to clean the room
with him.
常带 to 的不定式做宾语补足语的动词有: ask, beg, prefer, help, promise, wish, want, expect, permit, request, allow, command,
• You must remember to lock the door when you leave
• • • • • • • • • •
2. remember doing sth 记得曾做过某事 I remember locking the front door 3. forget to do sth 忘记要做某事 He forgot to do his homework yesterday 4. forget doing sth 忘记曾做过某事 I forgot saying this thing to you 5. try to do sth 努力做某事 He tries to answer each question 6. try doing sth 试着做某事 I tried singing an English song
doing指经常性动作，而 to do指一次性的动作。 I like swimming，but I don‘t like to swim now． 我喜欢游泳, 但我现在不想游。 begin\start to do sth begin\start doing sth
提示板：
• 后面只接动名词做宾的动词
巧记动词不定式作宾语歌诀：
•
• • • • • • •
想要拒绝莫忘记 （want, refuse, forget） 需要努力就学习 （need, try, learn） 喜欢帮助加同意 （like help agree ） 希望决定后开始 （hope, decide, begin, start）
动词不定式6种用法
动词不定式6种用法
动词不定式6种用法：
1、不定式的一般式：动词不定式一般式即to+动词原形。
所表示的动作是和谓语动词所表示的动作同时发生，但在多数情况下，是在谓语动词所表示的动作之后发生，不定时一般式与句子主语、宾语或for sb to do sth。
结构中的介词宾语有逻辑上的主谓关系。
2、不定式的完成式：即to have+过去分词。
动词不定式完成式所表示的动作发生在谓语动词所表示的动作之前，它的逻辑主语也是句子的主语或宾语。
3、不定式的进行式：to be+现在分词。
动词不定式进行式所表示的动作正在进行中，而且与谓语动词所表示的动作同时发生。
4、不定式的否定式：动词不定式的否定式是由not+动词不定式构成。
5、不定式的被动式：当不定时的被动式逻辑主语是不定式所表示的动作的承受者时，用不定时的被动形式，即to be done或to have been done。
6、to代替整个不定式：如果句子前面出现过同样的动词，为避免重复，句子后边的不定式应省略动词原形及其后续部分，只保留不定式的符号to。
不定式用法小结
一、语法功能
（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 do It's our duty to take good care of the old. ②It takes sb+some time+to do How long did it take you to finish the work? ③It+be+形容词+for sb+to do It is difficult for us to finish writing the composition in a quarter of an hour. ④It+be+形容词+of sb+to do It is stupid of you to write down everything (that) the teacher says. ⑤It seems(appears)+形容词+to do It seemed impossible to save money.
不定式的用法
不定式的用法1. 作名词不定式作名词时，可以充当主语、宾语、表语或宾补。
例如：- 主语：To learn is to grow.（研究就是成长。
）- 宾语：I want to eat pizza.（我想吃披萨。
）- 宾补：I consider it important to exercise regularly.（我认为经常锻炼很重要。
）2. 作形容词不定式作形容词时，可以修饰名词或代词。
例如：- 修饰名词：She has a book to read.（她有一本书可读。
）- 修饰代词：He gave me something to eat.（他给了我东西吃。
）3. 作副词不定式作副词时，可以修饰动词、形容词或副词。
例如：- 修饰动词：She studied hard to pass the exam.（她努力研究以通过考试。
）- 修饰形容词：He is too young to understand.（他太年轻，无法理解。
）- 修饰副词：She runs fast to catch the bus.（她跑得快来赶公交车。
）4. 其他用法除了上述用法外，不定式还有一些其他的用法：- 表示目的：I went to the store to buy some milk.（我去商店买牛奶。
）- 用于情态动词后：He should go to bed early.（他应该早点上床睡觉。
）- 用于与其他动词连用：He hopes to find a job soon.（他希望尽快找到一份工作。
）不定式的用法多种多样，需要根据具体的语境和句子结构来判断。
掌握不定式的用法能够帮助我们更准确地理解和表达语言中的意思。
不定式的用法及常见句型解析
不定式的用法及常见句型解析不定式（Infinitive）是英语中的一种动词形式，以“to + 动词原形”构成。
在句子中，不定式可以作为名词、形容词或副词的补语，具有多种用法和功能。
本文将对不定式的用法进行解析，并探讨常见的句型结构。
一、不定式作为名词的用法不定式作为名词的用法较为常见，主要有以下几种情况：1. 作主语例：To learn a foreign language is not easy.学习外语并不容易。
2. 作宾语例：I want to visit my grandparents this weekend.我想在这个周末去拜访我的祖父母。
3. 作介词的宾语例：She is looking forward to meeting you.她期待着见到你。
4. 作表语例：Her dream is to become a successful scientist.她的梦想是成为一名成功的科学家。
5. 作定语例：The best way to learn English is to practice speaking.学习英语的最佳方式是练习口语。
二、不定式作为形容词的用法不定式作为形容词补充说明名词的性质、状态或特征，常放在名词之后。
常见的结构有：1. 表示目的或用途例：He bought a book to improve his English.他买了一本书来提高英语水平。
2. 表示能力或可能性例：She is too young to drive a car.她年龄太小，不能开车。
3. 表示感知或意图例：I was surprised to see her at the party.在派对上见到她，我感到很惊讶。
三、常见的不定式句型在句子结构中，不定式可以与其他动词或词组搭配使用，形成各种句型。
以下是常见的几种句型：1. 动词不定式作为宾语补足语常见的动词有：want, hope, wish, expect, plan, promise等。
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不定式的用法1．作主语To swim in the sea is great fun.What to do next will be discussed later.It is important to be confident.It takes about 5 or 6 hours to get there.2．作宾语英语中下面几类词用不定式作宾语：1）hope, want, expect, wish, desire等表示希望，想要的动词The thief desired to get that large sum of money.2）like, love, dislike, hate 等表示好恶的动词I hate to ask my parents for money.3）plan, intend, mean, prepare等表示计划，打算的动词I meant to help you but I was too busy.4）decide, determine 等表示决定的动词We are determined to teach him a good lesson.5）其它I can’t afford to buy a car.My parents agreed to buy me a new bike.Everyone in the village helped (to) build the Youth Center.I failed to pass the exam.He managed to go to a famous university.Let’s continue to practice.I don’t dare to ask the teacher about my scores.You need to study harder from now on.3. 作表语1）表示将要发生的事The question is where to find water.What worries me is to speak at the meeting.2）表示目的性The purpose of this program is to introduce knowledge about science to the youth. 3）表示情态意义（应该）Nobody is to know.（不应让任何人知道）She is to blame.（她应该受到责备）What am I to do if I fail the exam?4．作宾补英语中下面几类词用不定式作宾补：1）let, have, make ,get等表示使役的动词let / have / make sb. do； get sb. to do2）ask, tell, request, order等表示要求，命令的动词The chairman requested the members to be silent.3）allow, permit, forbid等表示许可或禁止的动词The guard forbade me to enter.4）wish, want, expect, intend等表示希望的动词 (hope无此用法)Many parents expect their children to study abroad.5）see, hear, watch, feel, notice等表示感观的动词I noticed tears come into his eyes.注：这些词后的不定式均不带to6）think, consider, believe, find, know,suppose,prove等表示认为，相信，证明的动词 I consider him to be one of the best singers in the country.It’s proved to be true.She is believed to have gone to the USA.7）其它He advised me to read English as often as possible.I’m sure this treatment will help him (to) be cured.How can I persuade my father to give up smoking.He was encouraged to do something new for a change.Police warned drivers to avoid the roads through the center of town.It caused the little boy to cry loudly.The students are forced to do something they don’t like at all.I was invited to go to Jenny’s wedding party.Please remind me to take the raincoat.5．作定语1）不定式与所修饰的词有动宾关系（注：如不定式为不及物动词，其后应有介词）I had only five dollars to spare at the end of the travel.He is a pleasant person to work with.This is a good rule to go by.2）不定式作定语表示即将发生的事情I’m busy preparing for the exam to come in a few weeks.The lecture to follow is about America.3）常跟不定式作定语的名词Autumn is the time to visit Beijing.Thank you for giving me the chance to make the speech.It’s a good way to make girls happy.He made a great effort to improve his English.Chapline is the first to spread movie to all people.He would be the last to agree to the plan.He is the best to attend the competition.6. 作状语1）表目的The whole family went to beach to spend their weekend.I wrote to the advertiser in order to get more information. Let’s hurry so as not to be late.2）表原因He is shocked to hear of the accident.I’m sorry to trouble you.3）表结果You must be crazy to cheat in the exam.I went to the classroom only to find nobody there.7．疑问词+不定式I really don’t know which one to choose.She learned how to drive just recently.Can you tell me what to do now?Please show me how to start the engine.8．不定式的独立结构To tell the truth, I know nothing about it.（说实话）To be exact, he is a middle-aged man.（确切地说）To be frank with you, I don’t care at all.（坦白地说）To be sure, we can do it well.（当然）To be honest, you don’t fit for the job.（老实说）To put it another way, you must get an Ain the following exam.（换句话说）To be brief, this is what we must do.（简言之）To conclude, you have to try your bestto win the match.（总之）To do him justice, he is not a bad person.（说句公道话）To begin with, I want to introduce myself.（首先）1．作主语To swim in the sea is great fun.What to do next will be discussed later.It is important to be confident.It takes about 5 or 6 hours to get there.2．作宾语英语中下面几类词用不定式作宾语：1）hope, want, expect, wish, desire等表示希望，想要的动词The thief desired to get that large sum of money.2）like, love, dislike, hate 等表示好恶的动词I hate to ask my parents for money.3）plan, intend, mean, prepare等表示计划，打算的动词I meant to help you but I was too busy.4）decide, determine 等表示决定的动词We are determined to teach him a good lesson.5）其它I can’t afford to buy a car.My parents agreed to buy me a new bike.Everyone in the village helped (to) build the Youth Center.I failed to pass the exam.He managed to go to a famous university.Let’s continue to practice.I don’t dare to ask the teacher about my scores.You need to study harder from now on.3. 作表语1）表示将要发生的事The question is where to find water.What worries me is to speak at the meeting.2）表示目的性The purpose of this program is to introduce knowledge about science to the youth.3）表示情态意义（应该）Nobody is to know.（不应让任何人知道）She is to blame.（她应该受到责备）What am I to do if I fail the exam?4．作宾补英语中下面几类词用不定式作宾补：1）let, have, make ,get等表示使役的动词let / have / make sb. do； get sb. to do2）ask, tell, request, order等表示要求，命令的动词The chairman requested the members to be silent.3）allow, permit, forbid等表示许可或禁止的动词The guard forbade me to enter.4）wish, want, expect, intend等表示希望的动词 (hope无此用法)Many parents expect their children to study abroad.5）see, hear, watch, feel, notice等表示感观的动词I noticed tears come into his eyes.注：这些词后的不定式均不带to6）think, consider, believe, find, know,suppose,prove等表示认为，相信，证明的动词I consider him to be one of the best singers in the country.It’s proved to be true.She is believed to have gone to the USA.7）其它He advised me to read English as often as possible.I’m sure this treatment will help him (to) be cured.How can I persuade my father to give up smoking.He was encouraged to do something new for a change.Police warned drivers to avoid the roads through the center of town. It caused the little boy to cry loudly.The students are forced to do something they don’t like at all.I was invited to go to Jenny’s wedding party.Please remind me to take the raincoat.5．作定语1）不定式与所修饰的词有动宾关系（注：如不定式为不及物动词，其后应有介词）I had only five dollars to spare at the end of the travel.He is a pleasant person to work with.This is a good rule to go by.2）不定式作定语表示即将发生的事情I’m busy preparing for the exam to come in a few weeks.The lecture to follow is about America.3）常跟不定式作定语的名词Autumn is the time to visit Beijing.Thank you for giving me the chance to make the speech.It’s a good way to make girls happy.He made a great effort to improve his English.Chapline is the first to spread movie to all people.He would be the last to agree to the plan.He is the best to attend the competition.6. 作状语1）表目的The whole family went to beach to spend their weekend.I wrote to the advertiser in order to get more information.Let’s hurry so as not to be late.2）表原因He is shocked to hear of the accident.I’m sorry to trouble you.3）表结果You must be crazy to cheat in the exam.I went to the classroom only to find nobody there.7．疑问词+不定式I really don’t know which one to choose.She learned how to drive just recently.Can you tell me what to do now?Please show me how to start the engine. 8．不定式的独立结构To tell the truth, I know nothing about it. （说实话）To be exact, he is a middle-aged man. （确切地说）To be frank with you, I don’t care at all. （坦白地说）To be sure, we can do it well.（当然）To be honest, you don’t fit for the job. （老实说）To put it another way, you must get an A in the following exam.（换句话说）To be brief, this is what we must do.（简言之）To conclude, you have to try your bestto win the match.（总之）To do him justice, he is not a bad person. （说句公道话）To begin with, I want to introduce myself. （首先）。