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动词不定式是非谓语动词的一种，它通常由不定式符号to后接动词原形构成，但有时to也可省略(省略to的不定式叫不带to的不定式，与动词原形相同)。下面小编告诉你英语动词不定式的用法总结，大家一起来看看吧!英语动词不定式的用法总结：1.不定式作主语To see is to believe.常用it作形式主语It"s for sb/It"s of sb1)for sb. 常用于表示事物的特征特点，表示客观形式的形容词，如easy, hard, difficult, interesting, impossible等：It"s very hard for him to study two languages.2)of sb的句型一般用表示人物的性格，品德，表示主观感情或态度的形容词，如good, kind, nice, clever, foolish, cruel, right。It"s very nice of you to help meTo serve the people is my great happiness. 为人民服务是我的最大幸福。It is right to give up smoking.戒烟是对的。不定式作主语常见句型如下：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。It’s my duty to teach you how to be a useful person. 教你如何做一个有用的人是我的职责。It requires patience to be a good teacher. 当个好老师需要耐心。2.不定式作宾语不定式短语作宾语时，位于及物动词之后。可以直接用不定式作宾语的动词很多，常见 的有：agree, afford, tend, ask, decide, determine, expect, fail, hope, learn, intend, manage, offer, plan, promise, refuse, want, wish等。例如：I offered to help her, but she refused. 我提出帮助她，但她拒绝了。He pretended not to hear me. 他假装没听见我(的声音)。I don’t want to sound like I’m speaking ill of anybody, but the manager’s plan is unfair.我不想听起来象在说别人坏话，但经理的计划是不公平的。如果还带有宾语补足语。往往把不定式宾语放在宾语补足语之后，而用 it作形式宾语。常用动词有feel, think, find, believe, consider, make等。例如：I find it interesting to work with him. 我发现与他共事很有趣。We feel it our duty to help others. 我们认为帮助别人是我们的责任。Science and technology has made it possible for man to fly in space.科学技术已经使人类能够遨游太空了。下列动词后可接疑问词+不定式：teach、decide、wonder、show、learn、forget、ask、find out、advise、know等例如：Can you teach me how to use the computer? 你能教我使用电脑吗?I don’t know what to do next. 我不知道下一步怎么办。I want to speak to Tom.Please show us how to do that.3.不定式作宾补不定式作宾语补足语位于宾语之后，表示宾语的动作或状态。常用于以下动词之后：ask, tell, advise, allow, enable, expect, force, get, like, order, teach, want, invite, wish, beg等。例如：He asked me to do the work with him.他要我与他一起干。You should get more people to help you.你应该多找些人帮你。The teacher expected everyone to study hard,老师希望每个人都努力学习。注意：a. 在see，watch，look at，notice, observe，have，let，make, hear，listen to，feel，help等词后的补足语中，不定式不带 to。例如:I often hear him sing the song.我经常听见他唱这只歌。The teacher usually made the students recite the text.老师通常让学生背颂课文。Would you please help me (to) repair my bike?请帮我修理自行车好吗?但是这些句子如果变成被动结构时, 就必须带 to。例如:He is often heard to sing the song.人们常听到他唱这只歌。The students were usually made to recite the text.学生们常被要求背颂课文。b. 不定式动词在介词 but，except，besides后面时，如果这些介词之前有行为动词 do的各种形式，那么，这些介词后的不定式不带 to，否则要带 to.如：She could do nothing but cry.她只是哭。What do you like to do besides swim? 除了游泳你还喜欢干什么?c.主句含有不定式，后面有rather than, rather than后省to。d. Why not、had better、would rather、can’t but等词后省to。如：He could not but walk home.他只好走回家。注意：e. 常用带不定式作宾补的几种情况：(a) 主语 + ask / require / tell / order / force / get / want / like + sb.to do sth.(b)主语 + think / judge / suppose / believe / consider / imagine / consider / feel + sb. + to be/ to have done(c)主语 + call on / upon / depend on / wait for / ask for + sb.+ to do sth.a. Father will not allow us to play on the street.b. We believe him to be guilty.4.不定式作表语不定式可放在连系动词或be动词后面，形成表语。例如：My job is to help the patient.我的工作是帮助病人。Our most important task now is to make a plan.我们现在最重要的任务是制定一个计划。注：作表语的不定式都带to，但当主语部分有实义动词do时，to可以省略。例如：The only thing we can do now is wait and see.我们现在能做的事就是等着看。My work is to clean the room every day.5.不定式作定语不定式做定语通常要放在被修饰的词后。例如：I have some books for you to read.我有一些书给你看。We have a lot of homework to do today.今天我们有很多作业要做。He hasn’t kept his promise to write to his parents regularly.他没有信守定期给父母写信的诺言。注意：a.作定语的不定式如果是不及物动词，或者不定式所修饰的名词或代词是不定式动作 的地点、工具等，不定式后面须有相应的介词。例如：He is looking for a room to live in.他在找房子住。There is nothing to worry about.没有什么可担心的。Please give me a knife to cut with.请给我一把刀用。但是,不定式所修饰的名词是 time，place或 way，不定式后面的介词习惯上要省去。例如：He had no money and no place to live.他没有钱，也没有房子住。b.当作定语的不定式所修饰的名词或代词是不定式动作的承受者时，不定式既可以用主动语态，也可用被动语态，但其含义有所不同.试比较：Have you anything to send? 你有什么东西要寄吗?(不走式 to send的动作执行者是 you)Have you anything to be sent? 你有什么要(我或别人)寄的东西吗?(不定式 to be sent的动作执行者是已被省略的 me或 someone else)c.下列词语后常接不定式作定语：chance、wish、right、courage、need、promise、time、opportunity、way、the first、the second、the last、the only等。He is always the first to come and the last to leave.他总是第一个到，最后一个走。I have a lot of work to do.英语动词不定式的用法：动名词与不定式1) 动名词与不定式的区别：动名词表达的是： 状态，性质，心境，抽象，经常性，已发生的不定式表达的是： 目的，结果，原因，具体，一次性，将发生的2) 接不定式或动名词，意义相同。3) 动名词与不定式语义不同的有11 组：1　stop to do　　　　　stop doing2 forget to do　　　　 forget doing3　remember to do　　　remember doing4 regret to do　　　　 regret doing5　cease to do　　　　 cease doing6 try to do　　　　　　try doing7　go on to do　　　　 go on doing8 afraid to do　　　　 afraid doing9　interested to do　　interested doing10 mean to do　　　　　 mean doing11 begin/ start to do　 begin/ start doing不定式的特殊句型Why not"Why not +动词原形"表达向某人提出建议，翻译为："为什么不……?" "干吗不……?"例如：Why not take a holiday?干吗不去度假?不定式的特殊句型so as to1) 表示目的;它的否定式是so as not to do。Tom kept quiet about the accident so as not to lose his job.汤姆对事故保持沉默是为了不丢掉他的工作。Go in quietly so as not to wake the baby.轻点进去，别惊醒了婴儿。2)　so kind as to ---劳驾Would you be so kind as to tell me the time?劳驾，现在几点了。不定式完成式有哪些用法：动词不定式有“三种形式”，也叫“三种时态”，或叫“三种形态”。你说的两种情况是不同的，分别有针对性的。应该说，不同的形式有不同的用法。现分析如下：1. 一般式 (to do): It seems to rain this afternoon.“一般式”往往表示动作将要发生或者与谓语动词的动作几乎同时发生。例句说明，“今天下午看起来要下雨。”“rain” 在seem之后发生。2. 进行式 (to be doing): It seems to be raining outside.“进行式”往往表示不定式的动作正在发生。例句说明，“外面好像正在下雨。”(指在室内听见外面有下雨的声音或迹象), rain 和seem同时发生。3. 完成式 (to have done): It seems to have rained last night.“完成式”表示不定式的动作(或状态)发生在谓语动作(或状态)之前。例句说明，“昨晚好像下了雨。”(指早晨起床后发现地面潮湿，有下雨的迹象，才做出如此判断), rain 发生在seem之前。不定式完成式及完成进行式的用法：一、不定式完成式的用法不定式完成式主要表示发生在谓语动作之前的动作或表示在某个给定的时间之前已完成的动作。如：Sorry to have given you trouble. 对不起，打扰了。I feel fortunate to have met them. 我觉得很幸运能见到他们。I hope to have finished the work by Friday. 我希望星期五以前完成这项工作。注：表示过去未曾实现的想法和愿望。如：I should like to have come earlier. 我本想早点来的。I was to have told you about it but I didn"t have time to come over. 我本来要告诉你的，但我没有时间过来。二、不定式完成进行式的用法不定式完成进行式主要表示在谓语动作之前一直在进行的动作。如：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。