to-do-sth不定式用法
动词不定式用法详解
动词不定式（The Infinitive ）一、动词不定式的形式及意义构成时态语态复合结构否定式主动被动一般式to do to be done for sb.to do sth.of sb.to do sth.在“to”前加not 或never完成式to have done to have been done 进行式to be doing /不定式虽然没有人称和数的变化，但所表达的动作仍有时间先后顺序。
1、不定式的一般式，表示的动作通常与谓语动词表示的动作同时发生或在其后发生。
We are very glad to meet you again.再次见到你，我们非常高兴。
（同时发生）I hope to see you next week .我希望下周能见到你。
[不等式动作发生在谓语之后]I am ready to shave .我要刮脸了。
（自己挂自己的脸）I am ready to be shaved .我准备好刮脸了。
（由别人给自己刮脸）2、不定式的进行式，表示的动作正在进行，与谓语动词表示的动作同时发生。
They are to be waiting for us at the station.他们在车站等我们。
（作表语）He pretended to be reading attentively when I came in.我进去时他假装在专心读书。
（作宾语）3、不定式的完成式，表示的动作发生在谓语表示的动作之前。
He pretended not to have seen me .他假装没有看见我。
He is the first student in the school to have got the prize .在该校，它是第一个获得该奖的学生。
There is no need to have worried about it like that.不需要那样担忧。
The room seems to have been tidied up already .这个房子似乎好像已经整理过了。
to-do-不定式
To do 不定式不定式由“to do＋动词原形构成”其否定形式是“not to do”。
to do定式不能单独作谓语、不随主语的人称和数的变化而变化。
它有名词、形容词和副词的功能，但还保留动词的特征。
不定式可以带宾语或状语构成不定式短语，有时态和语态的变化。
不定式可作主语、宾语、状语、表语和定语。
不定式有时态和语态变化，具体结构如下表：1．不定式的用法1）作主语不定式短语作主语时，一般表示具体的、个别的、一次性的或具有将来意义的动作,谓语动词用单数。
To master a foreign Language requires painstaking effort (辛苦的努力).To combine theory with practice is a good way of learning.It＋动词＋宾语等＋to do sthIt makes me sick to think about it.It does you a lot of good _____ _( swim) in the rivers.②It＋be＋表语＋to do sthIt was rich to give up smoking.It was beyond me____ __( help)him.③It＋be＋表语＋for sb. to do sth/for sth. to be done．It is important for you to attend that meeting.It is a good idea _ ___ the books ____ __ (give) to her.④It＋be＋表语＋of＋名词/代词＋to do sthIt is kind of you to offer me this lovely holiday.It was careless_ ___ you ___ ___( leave) your book on the bus.2）作表语：①动词不定式作表语，其主语常常是wish，idea，task，purpose，duty，job等表示意向、打算、计划的词。
总结todo的用法(精选4篇)
总结todo的用法第1篇不定式在句中做定语通常做后置定语，即放在被修饰名词或代词后。
它通常有以下几种用法：(一)不定式常可用来修饰物，表示要做某事。
如：1、The next train to arrive was from NewYork.下一列到站的火车是从纽约开来的`。
2、I have nothing to say on this question.在这个问题上，我没有什么话要说。
3、We are looking for somewhere to live.我们正在找一个地方住。
(二)不定式还可用来修饰人。
如：1、He was the first guest to arrive.他是第一个到达的客人。
2、Miss Brown was the next person to rise to speak.布朗小姐是下一个起来发言的人。
3、He was a brave man to do what he did.他是个勇者才有这样的行为。
(三)很多特定的名词后也可用不定式做定语，这样的名词常用的有：way，time，reaso n，chance，opportunity，need，wish，effort，right，ambition等。
如：1、It's time for you to get up and go to school.你该起床去上学了。
2、There is no reason to doubt his word.没有理由怀疑他的话。
3、They have now an opportunity to go abroad to studyfurther.他们现在有机会出国深造。
(四)某些动词或形容词后可接不定式时，它相应的同根名词也常用不定式做定语。
如：1、He made an attempt to learn English well.他试图学好英语。
(attempt to do sth) 2、His ability to get on with people is his chiefadvantage.他能和人相处是他的主要优势。
不定式to-do的作用
I hope to have finished the work by now. 我希望现在以前已完成这项工作。
(3)表示过去未实实现的想法和愿望：I should like to have come earlier. 我本想早点来的。
We were to have been married last year. 我们本来打算去年结婚的。
4.不定式完成进行式的用法表示在谓语动作之前一直在进行的动作：You seem to have been writing very long. 你好像已经写了很久了。
The battle was said to have been going on for two days. 据说战斗已经进行两天了。
5.不定式被动语态的用法不定式到底用主动形式还是被动形式，往往取决于句子的意思，即意思上为主动就用主动形式，意思上为被动就用被动形式：Did it need to be done so soon? 这事需要这么快就做吗?It remains to be seen whether you are right. 你是否正确，以后见分晓。
I’m pleased to have been given this opportunity.给了我这次机会我很高兴。
注：有关不定式用主动形式表示被动意义的内容，参见本讲义“被动语态”之内容。
句子中的作用:1. 作主语To see is to believe. 眼见为实。
To talk with him is a great pleasure. 和他谈话是一件非常愉快的事。
To remember this is very important. 记住这一点很重要。
注：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，而在句首使用的主语位置使用形式主语it：It’s very import ant to remember this. 记住这一点很重要。
to-do-sth不定式用法
to-do-sth不定式用法D234例如：This picture makes me feel tense！Of course we want to see Liu Yu achieve his dreams.○3.help后接动词不定式作补语，to可带可不带。
一般说来，带to表间接帮助，不带to表直接帮助。
在被动语态句里，或者用不定式的否定式作补语时要带to。
例如：They can help you to compare two different products so that you can buy the one you really need.Using e-mail English helps you write quickly.○4.be said, be sure, happen, seem等后面可以接带to的动词不定式作主语的补语。
例如：He doesn’t seem to have many friends.Be sure not to miss them if they come to a city near you.6、用作状语○1.目的状语，置于句首或句末，置于句首时常表示强调。
为加强语气，常与in order或so as 组成短语。
例如：A group of young people got together to discuss this question.In order to help him, we would do everything we can.注意：置于句首时只用to do / in order to do。
○2.原因状语，多见于“sb.+be+adj.+to do...”结构句中。
例如：I was very sad to hear the news.On Monday he told a radio interviewer that he had run out of money to buy old bikes.○3.结果状语，多见于“too...to”，“enough to...”结构句中。
to-do用法---复习(共25张)
I’ll get someone ___ repair the recorder for you. 3. What caused him ___ change his mind? 4.I wish you ___ come as soon as possibl e. 5. He asked me ___do the work with him.
his mother told him _____. (95 N)
A. not to
B. not to do
C. not to it D. do not to
为__了__避__免__重__复_，__常__用__省__略_形__式___t_o_来__代__替__前_面__的__动__作__。_如__：_ Would you like
warn ask wish want 等 特别注意： hope, agree, demand, suggest 等没有宾补。
第13页，共25页。
see
watch observe look at
notice hear listen to feel
make let have
do （…做了…）
+宾 语
(bīnyǔ)
The machine couldn’t work. Let’s try repairing it.
第8页，共25页。
4) remember doing/to do
remember to do 记得去做某事 remember doing 记得做过某事 记着放学后去趟邮局。 Remember to go to the post office after school. 你不记得以前(yǐqián)见过那个人吗?
too...to do sth用法
在一般情况下,too... to...结构意为“太……以致不能……”,too后接形容词或副词,to是动词不定式符号,后接动词原形,动词不定式表示否定意义。
但是,too... to...结构在以下情况中,动词不定式表示肯定意义。
一、too... to ...的意义too...to...句型形式是肯定的，但表达否定意义，表示"太……而不能……"。
too 的后面接形容词或副词的原级，to的后面接动词原形，构成动词不定式。
too...to...句型是简单句。
例如：He is too young to join the army.他年龄太小，不能参军。
二、动词不定式的逻辑主语动词不定式所发出的动作，其执行者与整个句子的主语不同指一个人或物时，需要在动词不定式前加上一个逻辑主语(for sb.)。
例如：The maths problem is too difficult for me to work out.这道数学题太难我不能解出它。
三、too...to...结构表示肯定意义的情况1. too前面含有表示否定意义的词，例如: not, never, nothing等时，too... to...结构不表示否定意义。
例如：One is never too old to learn.活到老，学到老。
2.如果在too...to...结构的前面出现了only,不仅免去了其否定意义，反而加强了它的肯定语气，only too相当于very或very much。
例如：I shall be only too pleased to get home.我将极高兴地回家。
3. too后为表示情感的形容词，例如：glad, pleased, happy, sad等时，表示的是肯定意义。
例如：He is too sad to hear the bad news.听到不幸的消息他太悲伤了。
四、too...to...结构与... enough to...结构及so...that...结构的相互转换1.将too...to...结构转换为...enough to...结构时要注意：①enough前的形容词或副词须是too前面形容词或副词的反义词；②...enough to ...句式须用否定式；③too...to...结构有逻辑主语时，...enough to...结构也要加上逻辑主语。
动词不定式的用法总结
动词不定式的用法总结动词不定式(to do)是英语课的一个重点，也是很多考试中要考查的一个项目。
你知道动词不定式的用法有哪些吗？接下来，小编给大家准备了动词不定式的用法总结,欢迎大家参考与借鉴。
●动词不定式的用法总结动词不定式属于非谓语动词的一种形式，很多同学经常把它和谓语动词混在一起，掌握起来有困难。
下面我们对动词不定式的用法做简单归纳，帮助同学们记忆：一、动词不定式在句子中不能充当谓语，没有人称和数的变化。
二、动词不定式是由“to+动词原形”构成(有时可以不带to)。
动词不定式的否定形式是“not+动词不定式”(not不与助动词连用)。
三、动词不定式短语具有名词、形容词和副词等的功能，可在句中用做多种句子成分。
1、主语：常置于句末，而用it代替其做形式主语。
例：To go in for sports helps youstay fit.(book4，L28)It helps you stay fit to go in for sports. It is dangerous to swim in the deep sea on your own.注：此句式中不定式逻辑上的主语可由for或of引出，逻辑主语由of引出时，表语的形容词为kind，nice，good，polite，clever，foolish，right，wrong等表示评价的形容词。
例：It's right of him to refuse the invitation1.(him为逻辑主语)2、表语：Our duty is to protect the enviroment.3、动词宾语：此种情况可按固定搭配或句式去记。
例：would you like to see my photos?Kevin planned to visit his uncle.(book4，L11)和plan用法一样的词还有：start，want，agree，hope，begin，decide等。
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动词不定式巧记动词不定式的用法具体用法一、动词不定式的基本形式是“不定式符号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。
在句中不能单独作谓语，但仍保留动词的特性，可以有自己的宾语、状语等。
动词不定式同它的宾语和状语一起构成不定式短语。
例如：to sell flowers in the street 在街上卖花to speak in the classroom 在教室里讲话不定式省to有四种情况：1、使役动词let, make, have等后接不定式。
例如：Let him go! The boss made the child labors work the whole night.2、would rather, had better后。
例如：You had better stay at home.3、Why…/Why not…后。
例如：Why not have a good rest on Sunday?4、感官动词see, watch, look at, hear, listen to, smell, feel, find，notice 等后作宾语补足语，省to。
例如：I saw him dance.注意：这些情况在被动语态中，不可省to. 例如：The child labors were made to work the whole night.二、动词不定式具有名词、形容词和副词的特征，可以作句子的主语、表语、宾语、宾语补足语、定语和状语。
1、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。
例如：The head teacher said it was necessary to talk with his mother.How to make requests politely is important.2、用作表语动词不定式作表语，常用在be动词及seem, appear, happen等词之后，构成系表结构。
说明主语的内容、性质、特征。
例如：The best way to improve your English is to join an English club. She seem to be well-known.3、用作宾语○1. 用作宾语的动词不定式，常用在动词ask, choose, agree，expect, hope, decide, learn，prefer, know，wish, want, would like / love等及物动词之后，构成动宾短语。
例如：We decided to talk to some students about why they go there.He prefers to eat white bread and rice. I’d love to visit Mexico.○2.动词feel, find, make, think, believe等，在语法上不能接受不定式作宾语，只有用it作形式宾语，从而把动词不定式后置。
句子结构是：主语＋feel / find / make / ... it+adj. / n.+to do...。
例如：I find it difficult to remember everything.○3.既可接动词不定式又可接v-ing形式作宾语，意思差别不大的动词有begin, start, like, love等。
一般说来，动词不定式表一次、数次的具体动作的全过程，v-ing形式表习惯性的连续动作。
但这种区别并不很严格，特别是美式英语，即使是习惯性的动作也可以用动词不定式。
例如：Then I started to watch English-language TV.I’m beginning to understand my Chinese roots, and who I am.（begin用了进行时态，后面只接不定式作宾语，表示事情刚开始，还要继续下去。
）○4.后接动词不定式或v-ing形式作宾语，意思差别较大的动词有forget, remember等。
后接不定式作宾语，表动作尚未发生；后接v-ing形式作宾语，表动作已经发生。
stop to do停下来做另外一件事，to do是目的状语；stop doing停止做、不做当前这件事，doing是宾语。
try to do尽力做，try doing试试看；go on to do接着做另外的事，go on doing继续做原来的事。
例如：When I left home, I had forgotten to bring it with me.I stopped using them last year.○5后只接v-ing作宾语的一些常用特殊动词：give up, enjoy, practice, finish, mind等。
例如：Would you mind opening the window?4、用作定语用作定语的动词不定式一般都位于被修饰的名词之后。
例如：I have so much homework to do today. I cant think of any good advice to give her.通常chance, place, time, way等名词后接不定式作定语。
另外在the first, the second, the last, the only等词后，也常用不定式作定语。
例如：He needs time to do homework. You want to know the best way to get around the city.5、用作补语○1.常见动词不定式作宾语补足语的动词主要有：要求允许提议警告（ask, allow, permit, advise，warn），期望邀请鼓励（expect, suppose, invite, encourage），教导告诉想要（teach, tell, want），希望愿意（wish, would like / love）。
例如：I invited her to have dinner at my house. Teenagers should be allowed to choose their own clothes.○2.动词不定式作补语，在主动语态句里不带to，被动语态句里带to时多数动词是感官动词和使役动词，包括四“看”：look at, observe, see, watch，三“让”：have, let, make，二“听”：hear, listen to，一“感觉”：feel，一“注意”：notice。
例如：This picture makes me feel tense！Of course we want to see Liu Yu achieve his dreams.○3.help后接动词不定式作补语，to可带可不带。
一般说来，带to表间接帮助，不带to表直接帮助。
在被动语态句里，或者用不定式的否定式作补语时要带to。
例如：They can help you to compare two different products so that you can buy the one you really need.Using e-mail English helps you write quickly.○4.be said, be sure, happen, seem等后面可以接带to的动词不定式作主语的补语。
例如：He doesn’t seem to have many friends.Be sure not to miss them if they come to a city near you.6、用作状语○1.目的状语，置于句首或句末，置于句首时常表示强调。
为加强语气，常与in order或so as 组成短语。
例如：A group of young people got together to discuss this question.In order to help him, we would do everything we can.注意：置于句首时只用to do / in order to do。
○2.原因状语，多见于“sb.+be+adj.+to do...”结构句中。
例如：I was very sad to hear the news.On Monday he told a radio interviewer that he had run out of money to buy old bikes.○3.结果状语，多见于“too...to”，“enough to...”结构句中。
例如：Then I’m too tired to do well. He is old enough to go to school .○4.独立动词不定式多用作插入语，表示说话人的心理状态或对事情的看法。
例如：I’d like to stay healthy, but to be honest, I only eat food that tastes good.To begin with, she spoke too quickly, and I couldn’t understand every word.7、动词不定式的复合结构动词不定式的复合结构是“for / of sb. to do sth.”，for / of引出不定式动作的逻辑主语。
这种结构在句子中可以作主语、宾语、表语、定语、状语等。
不定式复合结构的介词用for还是of，主要决定于前面形容词的性质。
一般说来，of前面的形容词是careful, clever, foolish, good, kind, nice, wise等，既说明人的特性，又说明不定式动作的特性。
for前面的形容词是dangerous, difficult, easy, hard, heavy, important, interesting, necessary等，一般说明不定式动作的特性，不说明人的特性。
前面如果是名词用for。
例如：Its also probably a good idea for parents to allow teenagers to study in groups during the evening.It’s kind of you to help me.8、带疑问词的不定式短语动词不定式前面可以带疑问代词what, which, who或疑问副词how, when, where, why等。