be to do的用法

“be to do”的用法

一般说来，“be to do”这个结构有两种语法意义，其一是连系动词be+动词不定式做表语，其二是be to是一个独立词汇单位,具有情态含义,可以把它叫做情态习语(modal idiom)。

一、be +动词不定式, 不定式做表语,表示主语和表语在概念上是等同的。如：

The problem is to find a solution.

His plan is to clean the room.

My wish is to be a doctor.

二、be to +动词不定式中的be to用作情态习语, 这时的be to do表示: “计划”、“安排”、“义务”、“应该”、“可能”、“命运”等。(have to, ought to)。如:

He is to have a holiday. (表示将来)

The committee is to meet today. (表示计划、安排)

You are to go to the hotel where rooms have already been booked for you.

1. 表示“将”、“计划”、“安排”。(意思接近于be going to) 如：

Their daughter is to get married soon.

Who is to question him？

It was the last film at the cinema，which was to close next day.

After dinner they were to go to a movie.

was/ were to do 表示过去曾经计划要做的事，或者过去应当做的事，而且从现在的角度来看已经实现了。如：

I felt nervous because I was soon to leave home for the first time.

I was to play Juliet.

The expedition was to start in a week’s time.

was/ were to have done, 表示“本打算”、“本计划”或“本应当”做的事而没有做成或没有发生。如:

I was to have seen him last Wednesday, but he didn’t come.

We were to have been married last year.

2. 表示“义务”、“应该”。(意思接近于should， must， ought to， have to) 如：

No one is to leave the building. 谁也不得离开这楼房。

You are not to smoke in this room.=You are not supposed to smoke in this room.

You are to be back by 10 o’clock.你必须十点以前回来。

3. 表示可能性, 相当于can, may 如:

Such books are to be found in the library. 这样的书在图书馆里就能找到。

Not a single sound was to be heard. 一点儿声音也听不到。

Not a soul was to be seen. 看不到一个人影。

She was nowhere to be found. 哪儿也找不到她。

She was never to see his wife and family again.

5. 表示“命运”,将来必然要发生的事, 译作“注定……”。如：

He came to power, but he was to play dearly for it: soon he was assassinated.

The worst is still to come.

They said goodbye, little knowing they were never to meet again.

6. 用于“if…were to do”，表示虚拟语气。如：

If it were to rain tomorrow, the sports meeting would be put off. 如果明天下雨, 运动会就会延

期。

"be to do"的5种用法

一、表示“按计划、安排即将发生某事或打算做某事”。

例：She is to be seen in the lab on Monday.（星期一你准会在实验室见到她。

二、该做或不该做的事情（语气上接近于should, must, ought to, have to），表示一种命令、规劝性语气。

例：You are to go to bed and keep quiet, kids. Our guests are arriving in less than 5 minutes.（孩子们，你们必须上床睡觉，不准吵闹。我们的客人5分钟之内就要到了。）

三、能或不能发生的事情（接近can, may）

例：How am I to pay such a debt?（我怎么可能还得起这么大的一笔债呢？）

四、不可避免将要发生的事情，后来将要发生的事情。

五、用于条件从句“如果……想，设想”（接近if ……want to,或if ……should）

to do do doing的用法

和to do 连用的固定搭配 ask sb. to do sth. 请求某人做某事 be pleased /be glad to do sth.很高兴做某事 be sorry to do sth很难过做某事 can't wait to do sth. 迫不及待地做某事 can't afford to do sth. 不能担负起干某事 decide to do sth. 决定做某事 do/try one's best to do sth.尽全力做某事 do nothing to do sth. 对……无能为力 deserve to do sth. 值得干某事 ( not )形容词/副词+enough to do sth. （不）足以做某事encourage sb. to do sth. 鼓励某人做某事 find + it + 形容词+to do sth. 发现做某事…… get ready to do sth. 准备做某事 go on to do sth. 继续做某事 hope to do sth. 希望做某事 improve sth. to do sth. 改善/提高某物来干某事 invite sb. to do sth. 邀请某人干某事 It's better to do sth. 干某事比较好 It's time to do sth. 到该做某事的时间了。 like to do sth. 喜欢做某事…… like sb. to do sth. 喜欢某人做某事 love to do sth. 爱做某事

learn to do sth. 学会做某事 make up one's mind to do sth. 下决心做某事 make a list of five ways to do sth. 列出干某事的五种方式的清单need to do sth. 需要做某事 plan to do sth. 计划干某事 prefer to do sth.+ rather than do sth. 喜欢……不喜欢…… refuse to do sth. 拒绝干某事 remember to do 记得要去做某事 The best time to do sth. is…干某事的最佳时间是…… stop to do sth. 停下来去做另一件事 start/begin to do sth. 开始做某事 seem to do sth. 似乎要做某事 make up one's mind to do sth. 一心要做某事 tell sb. to do sth. 告诉某人做某事 too…to do sth.太……以致于不能…… try to do sth. 努力/试着去做…… think it nessary for sb. to do sth. 认为某人有必要干某事 There's no time to do sth. 没时间做某事 teach sb. (how) to do sth. 教某人干某事 used to do sth. 过去常常干某事 wish sb. to do sth. 希望某人做某事 would love to do sth. 很愿意做某事 would like (sb.) to do sth. 想让某人做某事 want to do sth. 想做某事

todo与doing的区别

--- to do与doing的区另U 一般情况下，to do 是一般将来式,是打算去做什么（未做）;doing是现在进行式,是现在正在做什么，或（此事已做过或已发生、正做） like to do 和like doing 的用法有什么区别 简单的记忆方法。当表示喜欢，用like doing ，如：He likes cooking in his house. She likes singing. 表示爱好。 当表示想要，欲做某事（但还没进行）用like to do ，例如：He likes to cook in his house.- 他想在自己家做饭吃。 She likes to stay with us.- 她想和我们带一块儿。（但还没进行） 2 forget doin g/to do forget to do 忘记要去做某事。（未做） forget doing 忘记做过某事。（已做） The light in the office is stil on. He forgot to turn it off. 办公室的灯还在亮着，它忘记关了。（没有做关灯的动作） He forgot turning the light off. 他忘记他已经关了灯了。（已做过关灯的动作） Don't forget to come tomorrow. 别忘了明天来。（to come动作未做） 3 remember doin g/to do remember to do 记得去做某事（未做） remember doing 记得做过某事（已做） Remember to go to the post office after school. 记着放学后去趟邮局。 Don't you remember see ing the man before? 你不记得以前见过那个人吗？ 感官动词 see, watch, observe, notice, look at, hear, listen to, smell, taste, feel +doing表示动作的连续性，进行性 I saw him working in the garden yesterday. （强调”我见他正干活”这个动作） 昨天我见他正在花园里干活。

used to do的用法

used to do的用法 张瑛2015.11 used to do意为“曾经是；过去常常”，表示过去存在的状态，或过去经常做某事而现在不做了，只用于一般过去时。其在陈述句、一般疑问句和反意疑问句中的用法如下： 一、陈述句 1. 在肯定句中，used没有人称和数的变化。例如： My granny used to be a history teacher. 我奶奶过去是一位历史教师。 He used to go to work by bus. 他过去常常坐公共汽车去上班。 2. 在否定句中，used to do有两种句式： A. 主语+ did not use to + 动词原形...。例如： He didn’t use to live here. 他过去不住在这儿。 B. 主语+ used not to + 动词原形...。例如： He usedn’t to smoke. 他过去不吸烟。 二、一般疑问句 在一般疑问句中，used to do有两种句式： A. Did + 主语+ use to + 动词原形...?。例如： Did he use to spend much time playing computer games? 他过去常花很多时间玩电脑游戏吗？ B. Used + 主语+ to + 动词原形...? 例如： Used he to go to school on foot? 他过去常步行上学吗？

三、反意疑问句 在反意疑问句中，used to do也有两种句式： A. 陈述句+ used(n’t) + 主语?。例如： He used to like eating hot food, usedn’t he? 他过去爱吃辣的食物，对不对？ He usedn’t to have curly hair, used he? 他过去没留卷发，对吗？ B. 陈述句+ did(n’t) + 主语?。例如： There used to be an old tree behind my house, didn’t there? 过去在我家房子后面有一棵老树，对不对？ Peter used to walk to school, didn’t he? 彼得过去步行上学，对不对？ 注：1. used to do sth.可用于各种人称，表示过去存在但现在已经停止的情况或习惯。例如： He used to go home by bike. 他过去常常骑自行车回家。The river used to be clean. 这条河以前是干净的。 2. be used to + n. / doing sth. 意为“习惯于…… / 做某事”。例如： I’m not quite used to the weather here yet. 我还不太习惯这里的天气。 He is used to traveling by train. 他习惯坐火车旅行。 3. be used to do sth. 意为“被用来做某事”。例如：

for sb to do sth的用法

for sb to do sth的用法 “for+ 不定式”是英语中一个十分有用的结构，不仅在阅读理解中经常出现，而且，如果同学们在书面表达中能巧妙地运用它，将会增添文章亮点，提高文章的档次。为帮助同学们正确理解和掌握这一结构，本文对这一结构的用法作了一个全面的归纳，同时，对于其使用上应注意的地方也给出了详细的说明。 一、“for+宾语+不定式”的句法功能1. 用作主语For you to ask Joe would be a big mistake. 你要是去问乔，那将是一大错误。For Ann to go to France would make me very happy. 安要是到法国去将使我感到很高兴。注：这类结构通常会借助形式主语来表达，即在句首使用形式主语，而将真正用作主语的“for+宾语+不定式”结构移至句末。如：It’s too expensive for me to buy. 太贵了，我买不起。It’s impossible for me to lea ve my family. 我是不可能离开家的。It’s impossible for the job to be finished in time. 这项任务要按时完成是不可能的。It’s an honour for me to be asked to speak here. 我很荣幸被邀在这里讲话。It’s a new experience for her to be travelling by plane. 坐飞机对她是—次新经历。—It’ll take time for her to recover from the illness. 她的病要很长时间才能痊愈。It took twenty minutes for the smoke to clear. 过了20分钟烟才散完。2. 用作表语It is for you to decide. 该由你来决定。His idea is for us to travel in separate cars. 他的意思是我们不要同乘一辆汽车。Our aim is for students to learn as quickly as possible. 我们的目的是让学生尽快学到东西。All I want is for us to be together. 我希望的只是我们能在一起。The simplest thing is for him to resign. 最简单的办法是他辞职。3. 用作宾语She hates for people to feel sad. 她不愿看到人们忧心忡忡。They didn’t mean for her to read the letter. 他们并未打算让她看那封信。I would like for you to stay as long as you want. 我希望你留下来，想留多久就留多久。注：这类结构用作宾语的情形主要见于非正式的美国英语中，且主要限于like, hate, mean, intend等少数动词。不过，当有形式宾语时，这类结构用作宾语的情况倒是很普遍(注意形式宾语的使用)。如：He made it very difficult for us to refuse. 他弄得我们很难拒绝。I thought it strange for -FAMILY: 'Times New Roman'">她这么晚还不回来，我觉得有些奇怪。4．用作定语It’s time for everybody to go to bed. 是大家睡觉的时候了。There’s nothing for the cats to eat. 猫没有东西可吃了。Have you got something for me to do? 你给我找了什么事做吗? All that remains for me to do is to say goodbye. 剩下我所要做的就是告辞了。5. 用作同位语He gave orders for one million military personnel to demobilize. 他命令100万军人复员。 6. 用作状语(1) 目的状语。如：目的状语。如：I can’t wait for them to finish talking. 我不能等到

todoanddoing用法

加to do 的动词 attempt企图enable能 够 neglect忽视afford负担得 起 demand要求long渴 望 arrange安排destine注 定 mean意欲，打算begin开 始 expect期望omit忽略，漏 appear似乎，显得determine决定manage设 法cease停止 hate憎恨，厌恶pretend假装 ask问dread害 怕 need需要agree同 意

desire愿望love 爱 swear宣誓volunteer志愿 wish希望bear承 受 endeavor努力offer提 供 beg请求fail不 能 plan计划 bother扰乱；烦恼forget忘 记 prefer喜欢，宁愿care关心，喜欢happen碰 巧prepare准 备decide决 定learn学 习 regret抱歉，遗憾choose选择hesitate犹 豫profess表明

claim要求hope希 望 promise承诺，允许start开始undertake承 接want想要 consent同意，赞同intend想要refuse拒 绝decide决定 learn学习vow起contrive设法，图谋incline有…倾向propose提议seek 找，寻觅 try试图 2)下面的动词要求不定式做宾补：动词+宾语+动词不定式 ask要求，邀请get请，得 到 prompt促使allow允 许 forbid禁止prefer喜欢，宁愿announce宣 布force强

迫 press迫使bride 收 买 inspire鼓舞request请求 assist协助hate憎 恶 pronounce断定，表示advise 劝告exhort告诫，勉 励pray请求 authorize授权，委托help帮 助recommend劝告，推荐bear容 忍implore恳 求remind提醒 beg请求induce引 诱 report报告compel强 迫 invite吸引，邀请，summon传 唤command命 令intend想要，企

used to的用法小结

used to的用法小结 1．used to do sth.表示“过去常常做某事”，将过去和现在对比，暗示现在不做了。to为动词不定式符号，后接动词原形。如： He used to go to school at six o'clock.他过去常常六点去上学。 2．used to do sth.的否定形式 主语＋usedn't to do sth.或主语＋didn't use to do sth.如： He used to play computer games all day.他过去常常整天玩电脑游戏。 →He usedn't to play computer games all day. ＝He didn't use to play computer games all day.他过去不常整天地玩电脑游戏。 【注意】usedn't＝used not 3．used to do的疑问句形式及其答语 (1)Used＋主语＋to do…？ 回答：Yes，https://www.sodocs.net/doc/658371952.html,ed to./No，https://www.sodocs.net/doc/658371952.html,edn't to.如： Tom used to watch TV.→Used Tom to watch TV? Yes，he used to./No，he usedn't to. (2)Did＋主语＋use to do…？ 回答：Yes，sb.did./No，sb.didn't.如： I used to do homework after school.→Did you use to do homework after school? Yes，I did./No，I didn't. 4．used to do的反意疑问句形式也有两种，类似于否定句形式。如： —They used to see English movies on Sundays，usedn't they？/didn't they? —Yes，they used to./No，they usedn't to.或Yes，they did./No，they didn't. 5．used to也可用于there be结构，表示“过去常有”。如： There used to be a meeting every Monday morning last month.上个月每个星期一上午总要开会。 6．get/be used to (doing) sth.习惯于(做)某事；use sth.to do sth.用……做某事；be used to do sth.被用来做某事；be used for (doing) sth.被用来做某事；be used by 被……所用。 语法精练 Ⅰ.用括号内所给单词的适当形式填空。 1．My little brother used (play) ping－pong. 2．I'm used to (get) up early. 3．Wood is used (make)desks，chairs，tables and so on. 4.you (use) to be short?

to do用法

动词不定式用法小结 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。 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。 To say is to believe.眼见为实。 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：（在形式上，位于系动词后的就是表语。从含义上讲，表语是回答主语“是什么”或“怎么样”的语法成分。） 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？ *如果and连接两个动词不定式，第二个动词不定式一般省“to”例： （1）He wants to go and have a swim with us. 他想和我们一起去游泳。 （2）若作宾语的动词不定式（短语）很长，可用it作形式宾语。 I find it interesting to learn English with you. 我觉得和你一起学英语很有趣。 He found it hard to catch up with others.他觉得赶上别人很困难。 四. 作宾语补足语。例如： The teacher asked us to read English for half an hour in the morning. 老师让我们早晨读半小时英语。 The teacher often tells Jim not to spend too much time playing computer games. 老师常告诉Jim不要花太多时间玩电脑游戏。 Please let me help you.让我来帮助你。 动词不定式作宾语补足语，表示宾语所做的动作，可以用动词不定式作宾语补足语的动词有：tell, ask, want, like, invite, encourage, help等。但在let, make, see, watch, hear, feel, notice, have等感官听觉动词或使役动词后面作宾语补足语的动词不定式一般要省略动词不定式符号“to”，可以归纳为以下三种句式： 1.不可以省to的不定式作宾语补足语： tell /ask / want / would like / wish / like / invite /encourage /teach sb. to do sth. 例：The teacher told us to come earlier tomorrow. I want you to go now. 我想让你现在就走。 Her parents wish her to be a teacher.她父母亲希望她当老师。 2.省“to”的不定式作宾语补足语： Let / make / have sb. do sth. Let the boy go out now. 让那个男孩出去。 The boy made the baby cry. 男孩弄哭了这个小孩。 see / watch / hear / notice / feel sb. do sth. I saw the students play basketball on the playground yesterday. 昨天我看见学生们在操场打篮球。 I often hear the girl sing in the next room. 我经常听到女孩在隔壁唱歌。 3.可省可不省的： help sb. （to）do sth. I often help my mother （to）do housework. 我经常帮妈妈做家务。 *动词不定式的否定式是直接在to之前加not. 例： （1）Tell them not to play football in the street.告诉他们不要在街道上踢足球。 （2）省to的动词不定式的否定式是直接在动词前面加not. 例： Let the boy not go. 让那个男孩别走。 （3）如果将主动语态变为被动语态时，作宾语补足语的动词不定式变为主语补足语，动词不定式则不省“to”，即原来省的再加上，例： The boy made the baby cry.

常见的todo与doing

常见的“to do”与“doing”现象 有些动词后既可接to do，也可接doing，它们后接to do与doing在意思上有时有较大的差别。因为它们也是中考的常考点之一，因而我们应该搞清楚它们的区别。 1. stop to do/stop doing sth。 解析：stop to do sth.意为“停下来（正在做的事）去做（另外的）某事”，to do sth.在句中作目的状语。而stop doing sth.意为“停止做（正在做的）某事”。如Mary stopped to speak to me.玛丽停下（手头的工作）来跟我讲话。 When the teacher came in. the students stopped talking.老师进来时，学生们停止讲话。 2. remember to do/remember doing sth 解析：remember to do sth.意为“记住要去做某事”（还没有做）。而remember doing sth.意为“记得（已经）做过某事”如： Please remember to send the letter for me.请记住为我发这封信。 I don’t remember eating such food somewhere.我不记得在哪里吃过这种食物 3. forget to do/forget doing sth 解析：forget to do sth.意为“忘记做某事”（动作还没有发生）。而forget doing sth.意为“忘记做过某事”（动作已发生）。如： Don’t forget to bring your photo here.别忘了把你的相片带来。 I have forgotten giving the book to him.我忘记我已把书给了他。 4. go on to do/go on doing sth 解析：go on to do sth.意为“做完一件事，接着做另外一件事”，两件事之间有可能有某种联系。而go on doing sth.意为“继续做下去”。如： After reading the text, the students went on to do the exercises.学生们读完课文后，接着做练习。 It’s raining hard, but the farmers go on working on the farm.虽然天正下着大雨，但农民们继续在农场干活。 5. try to do/try doing sth 解析：try to do sth.意为“尽力去做某事”，而try doing sth.意为“（用某一种办法）试着去做某事”。如： Try to come a little early next time, please.下次请尽量早点来。 You can try working out the problem in another way.你可以试试用其它的方法解答这道题目。 6. can’t help to do/can’t help doing sth 解析：can’t help to do为动词不定式结构；can’t help doing sth.意为“身不由己地去做某事”或“情不自禁地去做某事。”如： We can’t help to finish it.我们不能帮忙完成此事。 I couldn’t help laughing when I saw her strange face.当我看到她奇怪的脸时，我情不自禁地笑了。 7. hear sb. do/hear sb. doing sth 解析：hear sb. do sth.意为“听见某人做某事”，指听到了这个动作的全过程；hear sb. doing sth.意为“听到某人做某事”，指听到时候，这个动作正在发生。如： I often hear him sing in the classroom.我经常听见他在教室里唱歌。 Do you hear someone knocking at the door?你听见有人在敲门吗？ 应该说明的是：和hear的用法一样的还有see、watch、notice等。

todo和doing的差别

To do 和 doing的用法 1. finish, enjoy, feel like, consider, imagine, keep, postpone, delay, mind, practise, suggest, risk, quit+doing 2. 1）forget to do 忘记要去做某事（此事未做） forget doing忘记做过某事（此事已做过或已发生） 2）stop to do 停止、中断（某件事），目的是去做另一件事 stop doing 停止正在或经常做的事 3）remember to do 记住去做某事（未做） remember doing记得做过某事(已做) 4) regret to do对要做的事遗憾 regret doing对做过的事遗憾、后悔 5）try to do努力、企图做某事 try doing试验、试一试某种办法 6) mean to do打算，有意要… mean doing意味着 7）go on to do 继而（去做另外一件事情） go on doing 继续（原先没有做完的事情） 8）propose to do 打算（要做某事） proposing doing建议（做某事） 9) like /love/hate/ prefer +to do 表示具体行为；+doing sth 表示抽象、倾向概念 （注)如果这些动词前有should一词，其后宾语只跟不定式，不能跟动名词。例如： I should like to see him tomorrow． 10) need, want, deserve +动名词表被动意义；+不定式被动态表示“要(修、清理等)”意思。 Don’t you remember seeing the man before你不记得以前见过那个人吗 You must remember to leave tomorrow．你可要记着是明天动身。 I don’t regret telling her what I thought．我不后悔给她讲过我的想法。(已讲过) I regret to have to do this， but I have no choice．我很遗憾必须这样去做，我实在没办法。(未做但要做) You must try to be more careful．你可要多加小心。 Let’s try doing the work some other way．让我们试一试用另外一种办法来做这工作。 I didn’t mean to hurt your feeling．我没想要伤害你的感情。 This illness will mean (your) going to hospital．得了这种病(你)就要进医院。 3.省to 的动词不定式 1）情态动词 ( 除ought 外，ought to)： 2）使役动词 let, have, make： 3）感官动词 see, watch, look at, notice , observe, hear, listen to, smell, feel, find 等后作宾补，省略to。 注意：在被动语态中则to 不能省掉。 I saw him dance.

语法讲解(used to的用法)同步练习

语法讲解（used to的用法）同步练习 （答题时间：15分钟） Ⅰ. 单项选择 1. I ________ frustrated when I wasn’t sure of the correct answer. A. may be B. used to C. used to be D. use to be 2. When I was a child, I used to _________ chocolate. A. liking B. like C. liked D. likes 3. ___________ work in Microsoft? A. Did you used to B. Did you use to C. Do you used to D. Do you use to 4. Where ___________ live before you came here? A. did you used to B. did you use to C. use he to D. he used to 5. My father is used to _______at weekends. A. fish B. fishing C. fishes D. fished Ⅱ. 句型转换 1. Ann used to concentrate more on clothes than studies. （改为否定句） Ann ________ ________ to concentrate more on clothes than studies. 2. I used to have noodles for dinner. （改为一般疑问句并作肯定或否定回答） —________ you _______ ________have noodles for dinner? —Yes, I _________. — No, I _________. 3. The boy liked ice cream in the past. He doesn’t eat it now. （改为同义句） The boy ______ ______ ______ice cream. 4. Her sister used to be very short. （对划线部分提问） _________ _______her sister ______ _____ ________ ________? 5. He used to work late at night. （对划线部分提问） ______ ______ he _____ _____ ______ at night?

doing,todo,do的用法

一．To do形式 afford to do sth. 负担得起做某事 agree to do sth. 同意做某事 arrange to do sth.安排做某事 ask to do sth. 要求做某事 beg to do sth. 请求做某事 care to do sth. 想要做某事 choose to do sth. 决定做某事 decide to do sth. 决定做某事 demand to do sth. 要求做某事 expect to do sth. 期待做某事 fear to do sth. 害怕做某事 help to do sth. 帮助做某事 hope to do sth. 希望做某事 learn to do sth. 学习做某事 manage to do sth. 设法做某事 offer to do sth. 主动提出做某事 plan to do sth. 计划做某事 prepare to do sth. 准备做某事 pretend to do sth. 假装做某事 promise to do sth. 答应做某事 refuse to do sth. 拒绝做某事 want to do sth. 想要做某事 wish to do sth. 希望做某事 happen to do sth. 碰巧做某事 struggle to do sth. 努力做某事 advise sb. to do sth. 建议某人做某事allow sb. to do sth. 允许某人做某事 ask sb. to do sth.请（叫）某人做某事bear sb. to do sth.忍受某人做某事 beg sb. to do sth. 请求某人做某事cause sb. to do sth. 导致某人做某事command sb. to do sth. 命令某人做某事drive sb. to do sth .驱使某人做某事elect sb. to do sth. 选举某人做某事encourage sb. to do sth. 鼓励某人做某事expect sb. to do sth. 期望某人做某事forbid sb. to do sth. 禁止某人做某事force sb. to do sth. 强迫某人做某事 get sb. to do sth. 使（要）某人做某事hate sb. to do sth. 讨厌某人做某事 help sb. to do sth. 帮助某人做某事

to-do-sth不定式用法

动词不定式 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.