It的用法(专项总结及训练)
it的用法(专项总结及训练)
---------------------------------------------------------------最新资料推荐------------------------------------------------------it的用法(专项总结及训练)It 的用法（专项总结及训练）一、人称代词 1. it 的最基本用法是作代词，主要指刚提到的事物，以避免重复: ①They watched the train until it disappeared in the distance. 2. 也可以指动物或婴儿(未知性别的婴儿或孩子): ①Is this your dog？No, it isnt. ②They got a baby and it was a ten-pounder 3. 也可指抽象事物或指抽象环境和情景: ①I hate it when people talk with a full mouth.．二、非人称代词 1. it 有时并不指具体的东西而泛指天气、时间、日期、距离、价值、度量、温度、环境等：①指天气：It is a lovely day, isnt it? ②指时间: It was nearly midnight when she came back. ③指日期:It is April First today.④指距离:It is some 3000 kilometers from Beijing to Guangzhou.⑤指价值:It is three dollars. ⑥指温度:Today it is 30 degrees centigrade. 三、其他用法 1.在句子的主语不太明确时充当主语，表示谁在做某事：①Who is it there? It’s I (me/you/he.....). 2.泛泛的指某件事：(有时泛指一般情况) ①It doesnt matter. ②How is it going?(情况怎样) 3.it 用在一些词组中， it 没有特别的意思1/ 11The last train’s gone. Come on, we’ll foot it.(来，咱们步行吧。
(完整版)it做形式主语用法大全含练习及问题详解
It作形式主语常见句型动词不定式，动名词或主语从句作主语时，通常把它们放在谓语动词前，而用it作形式主语，放到句首，常见句型有：1. It + be + 形容词+主语从句，如：It is uncertain whether he can come to Jenny’s birthday party or not.2. It + be + 名词词组+ 主语从句，这类名词有：a fact, a pity, a shame, an honour，a question 等，如：It’s a pity that you missed the exciting football match.It remains a question whether he will come or not.3. It + be + 过去分词+ 主语从句，这类过去分词有：announced, believed, expected, hoped, decided, reported, said, shown等，如：It is reported that 16 people were killed in the earthquake.It is not decided who will give the operation to the patient.4. It + 不及物动词(seem, appear, happen等) + 主语从句, 这类不及物动词有：appear, happen, seem等，如：It seemed that he didn’t tell the truth.It happened that I was out when he called.5. It + be + 形容词+ for sb.）+ 动词不定式这类句型常用形容词easy, difficult, hard, important, possible，wise等作表语，有时候为了强调不定式动作的执行者，常在不定式前加for sb，如：It’s necessary for the young to master two foreign language.It is unwise to give the children whatever they want.这类形容词有：easy, difficult, hard, important, possible，wise6. It + be + 形容词+ of sb. + 动词不定式，这类形容词常是表示心理品质,性格特征的形容词，如：kind, nice stupid, clever, foolish, polite, impolite, silly, selfish, considerate等。
(完整版)It的用法总结
It的用法总结在英语中,it有许多不同的用法,它既可以用作代词(如人称代词、非人称代词)，也可以用作引导词（作形式主语或形式宾语），还可以用来构成强调句型。
.it用作代词(1) 用作人称代词在句子中作主语或宾语；指前面已经提到过的事物、动物或人，且it指特定的事物；如果指前文中提到的事物中的任何一个，用one。
one可以与any, each, every, not等连用，但one不可代替不可数名词。
—where’s your car?—it’s in the garage. 你的汽车在哪儿呢？在车库里。
(指代物品your car)did you hit it? 你打中了吗？ (指代事件)the baby cried when it was hungry.这婴儿饿时就哭。
（指代婴儿，尤指性别不详或无所谓时）—who is that?—it’s me. 是谁？我。
(指一定情景中所确定的人或事物，此时相当于指示代词，代指this和that,有时也指人)—what’s this?—it’s a box. 这是什么？一只箱子。
(2) 作非人称代词表示天气、日期、时间、温度、距离、价值、路程、度量、自然现象与环境等。
也可模糊地指一般情形或上文的部分或整个意思。
译成汉语时，it通常不一定译出来。
it’s a long time since they left. 他们走后很久了。
it’s two miles to the beach.离海滨有两英里远。
that’s just it—i can’t work when you’re making so much noise.原因就在这里——你弄出这么大的声音，我工作不了。
另外，需要注意两点：（1）“it’s time…”后面可以接不定式和介词短语表示“是做……的时候了”。
如：it’s time for supper. it’s time to have supper.(2) “it’s time…”后面还可以接一个从句，但是从句中的谓语动词一定要用过去式即虚拟语气，如：it’s time we had lunch.是我们吃饭的时候了。
it的七种用法
it的七种用法1.指代特定的事物或物体："我正在使用这台电脑，它非常好用。
"拓展："it"也可以指代不确定的事物或物体，特别是当我们无法或不想具体描述时。
例如："我听到了什么声音，但我不知道是什么，我觉得有点可怕。
"2.指代动物，尤其是不知道其性别或不确定其性别时： "我看到一只猫，它在树上爬来爬去。
"拓展："it"也可以用于指代婴儿或不确定性别的人。
3.指代强调上文所提到的事物或观点： "我买了一辆新车，我花了很多时间挑选，但它真的很值得。
"拓展：这种用法可以强调前面提到的具体事物或主题，并给予它更多的关注或认可。
4.被用作形式主语： "It's important to exercise regularly."拓展：在某些句子中，"it"可以用作形式主语，代表主语部分的内容，尤其是当真正的主语是以后出现时。
5.引导强调句： "It was John who broke the vase."拓展：在强调句中，"it"被用作形式主语，而真正的主语将被放置在句子的后部，以便强调。
6.用于指示时间、天气和环境条件： "It's raining outside."拓展："it"在描述天气、时间或条件时，常用于英语中，例如："It's getting late." "It's hot today."7.在某些习语中，表示状态或情感： "I'm over it." （我已经度过了这个困境）拓展：在某些习语或俚语中，"it"用于表示情感、状态或体验，并在一定程度上代表所描述的特定情况。
It用法小结
it 用法小结it 在英语语法中属人称代词，意思是“它”，用来指人以外的一切生物和事物。
它的用法不仅不简单，而且很复杂。
一、用于指人以外的一切生物、无生命的东西和事情。
一般指说话者心目中已经了解或所指的生物、无生命的东西或事情、没有性别的区分；可以是可数名词，也可以是不可数名词，在句子中既可作主语，也可以作宾语。
1.指动物和植物。
如：—Oh，that's L u cy's hat ．噢，那是露茜的帽子。
—It l ooks like a cat ！它看上去像只猫！Where's tea gr ow n？It's grown in the southeast of China．什么地方种植茶？中国东南部种植茶。
2.指代一些无生命的东西。
如：Is it your watch ？这是你的手表吗？Look at the rain ！It's heavy ，isn't it ？看这雨！雨很大，对吗？3.代替上文提到过的整个事情。
如：Well ，youmustn't play onthe road ．It's d a n g e r o u s．哦，你不能在公路上玩。
这太危险了！It was hard work ，but they really enjoyed it ．摘苹果是艰苦活，可他们都乐意去干（它）。
二、用于指代人。
1．指代说话者心目中不太清楚的那个人，常在打电话或敲门时用。
如：—Who was it ？是谁（打来的电话）？—Was it Susan ？（打电话的）是苏珊吗？—Yes ，it was ．是的，我是。
（根据上下句，“it was”也可不译出来。
）再如：—Who is knocking at the door ？谁在敲门？—It's me ．是我。
2.指说话者心目中的那个人。
如：—Is it your sister ，Kate ？（那旧照片上的baby ）是你姐姐凯特吧？—No！不是。
It用法小结及练习
It用法小结及练习一．作代词（指天气、温度、时间、距离等或代替前文提到过的事物。
）1. 今天天气晴朗。
2. 今天是星期二。
3. 学校到我家10分钟的步行路程。
4.我有一本字典，它使我聪明。
5 我没有字典，你能借我一本吗？二. 作形式主语1.Playing computer games all day long is a waste of time.=It is a waste of time playing computer games all day long.2.To learn English well is important for us.=It is important for us to learn English well.3. That we students should be kind to others is necessary.=It is necessary that we students should be kind to others.总结：it还常用于以下句型中It is strange/ important/necessary t hat…(should) do…It is no use /no good /a waste of time doing sth.It is/was thought （believed，said，reported）that sb / sth do/ have done…= sb/sth is/was said to do/ have done…Exercises1:1).对我们来说学一门外语是必要的。
2).经常帮助同学她真是太好了。
3).据说杰克已经通过了考试。
Exercises2:1). Aids is said __ the biggest health challenge to both men and women in that area in the past few years.A. that it isB. to beC. that it has beenD. to have beenIt is said that Aids has been the biggest health challenge to both men and women in that area in the past few years.2).The flu is believed _______ by viruses(病毒)that like to reproduce in the cells inside the human nose and throat.A. causingB. being causedC. to be causedD. to have caused3). ---Is Bob still performing?---No. He is said __ the stage already as he has become an official.A. to have leftB. to leaveC. to have been leftD. to be left句型总结：It is said that Aids has been the biggest health challenge t o…It is believed that the flu is caused by viruses that---It is said that he has left the stage already ---三．it 作形式宾语，常用句型如下：(think, feel, make, find, believe, consider…) + it + adj./ n. to do/ doing / that…1)He feels it his duty to help others.2)We found it impossible to finish the work in a day.3)We thought it no good working all the time.4)He made it clear that we shouldn’t break the school rules.Exercises1.她发现用英语回答这问题很难。
it用法及练习附答案
高三一轮复习I t的用法总结?It的用法在高考中也是重现率较高的语言点，尤其是it用于强调句。
其考查方式多通过“语法填空”进行，偶尔也出现在“短文改错”和“完形填空”中。
一、it 作人称代词的用法1. 指事物作为人称代词，it 可以除人以外的一切事物或动物。
如：I dropped my watch and it broke.It’s hard work, but I enjoy it.“Where is the dog?”“It’s in the bedroom. ”2. 指人it 指人主要用于指不性别不明的婴儿或用于确认某人的身份。
如：Is it a boy or a girl?There is a knock on the door. It must be the postman.【说明】在答语中，常用来指本人，如说It’s me。
3. 代替某些代词代词it 还可用于代替指示代词this, that 以及复合不定代词something, anything, nothing等。
如：“What’s this?”“It’s a new machine. ”Nothing is wrong, is it?二、it 作非人称代词的用法1. 基本用法：主要用于指时间、距离、价值、天气、气候及温度等自然现象。
如：It’s too late to go there now.It rained all day yesterday.It can get very hot here.2. 用于某些句型：It’s time for sb to do sth. 某人该干某事了。
It’s (about / high) time + that-从句. 某人该做某事了。
(从句谓语用过去式，有时也用“should+动词原形”)It’s first (second) time + that-从句. 某人第几次干某事。
(从句谓语用现在完成时)It’s + 时间段+ since-从句. 自从……有一段时间了。
it 的用法与练习
it 的用法与练习一、它，指提到过的或正在谈论的动物或事物,（used to refer to an animal or a thing that has already been mentioned or that is being talked about now）。
例如：What color is your bike? It is green.What's this? It's a book.二、指婴儿，尤指性别不详者。
（used to refer to a baby ,especially one whose sex is not known）。
例如：What a beautiful baby! Is it a boy?Who is knocking the door? I think it is John.三、指已知或正在发生的事实或情况。
（used to refer to a fact or situation that is already known or happening）例如：When the factory closes ,it will mean 600 people losing their jobs.四、it可以代替Ved/Ving/从句用作形式主语或形式宾语,而真正的主语或宾语在句末。
（used in the position of the subject or object of a verb when the real subject or object is at the end of the sentence）。
例如：It is impossible to finish the work by the end of 2008.It is no use arguing with him.The chairman thought it necessary to invite Professor Smith to speak at the meeting.(2005全国卷1)I t is reported that talks between the two countries are making progress.五、谈论时间、日期、距离、天气等时用作主语（used in the position of the subject of a verb when youare talking about time, the date, distance, the weather, etc.）。
高考英语It的用法
It的用法（专项总结及训练）一、人称代词1，it的最基本用法是作代词，主要指刚提到的事物，以避免重复:①They watched the train until it disappeared in the distance.2.，也可以指动物或婴儿(未知性别的婴儿或孩子):②Is this your dog？No, it isn’t.③They got a baby and it was a ten-pounder3.，也可指抽象事物或指抽象环境和情景:③I hate it when people talk with a full mouth.．二、.非人称代词1.it有时并不指具体的东西而泛指天气、时间、日期、距离、价值、度量、温度、环境等：⑴.指天气：It is a lovely day, isn’t it?⑵.指时间: It was nearly midnight when she came back.⑶.指日期:It is April First today.⑷.指距离:It is some 3000 kilometers from Beijing to Guangzhou.⑸.指价值:It is three dollars.⑹.指温度:Today it is 30 degrees centigrade.三、其他用法1.在句子的主语不太明确时充当主语，表示谁在做某事：①Who is it there? It's I (me/you/he.....).②I thought it was Mary, but it was not she.③Her face lighted when she saw who it was.2.泛泛的指某件事：(有时泛指一般情况)①It doesn’t matter.②It is a shame, isn’t it?③How is it going?(情况怎样)④It says in the newspaper that......3.指最好的或最渴望得到事物①He thinks he’s it. 他一直以为自己是最佳人选。
it的用法及例句
it的用法及例句It的基本用法全部整理在下面了，大家记得收藏起来，后面经常翻看和识记这些用法，达到熟练运用。
（一）用it作人称代词1）it最基本的用法是人称代词，主要用来表示刚提到的东西以避免重复The car accelerated as it overtook me.那辆汽车一加速就超过了我。
The action of salt on ice causes it to melt.盐作用于冰而使其融化。
I don’t care what a car looks like as long as it gets me from A to B.我到不在乎汽车的样子，只要能把我从一处载到另一处就行了。
I’ve never been there but it is,by all accounts,a lovely place.我从来没去过那个地方，但人们都说那地方很好。
The boat stuck on a sandbank but we soon got it afloat again.小船在沙丘搁浅，没过多久我们就又让它自由行进了。
His book reached an even wider audience when it was filmed for television.他的书拍成电视以后，受众范围更广了。
2）也可代表抽象的事物It was acclaimed as a great discovery.它被誉为一次伟大的发现。
Will you pay cash or should I charge it to your account ? 您愿意付现金还是计入您的账？Communication technologies are far from equal when it comes to conveying the truth.交流的技术在传递事实时差别是很大的。
3）也可指动物或未知性别的婴儿- Is this your dog ?- No,it isn’t.Her baby is due next month,she hopes it will be a boy. 她怀的孩子应该下月出生，她希望是个男孩儿。
高考英语It的用法
高考英语It的用法It是高考英语中一个极其重要的词，其用法多样，在不同的语境中具有不同的意义。
下面我们将从it的用法、句型和固定搭配三个方面进行讲解。
一、it用作实词1、表示时间、天气、距离、温度等自然现象。
例如：It is Monday today.今天是星期一。
It is raining outside.外面正在下雨。
It is 5 kilometers away from here.距离这儿有5公里远。
2、表示观点、看法、态度等主观想法。
例如：I think it is a good idea.我认为这是一个好主意。
We think it is important to learn English well.我们认为学好英语很重要。
二、it用作形式主语当不定式、动名词或从句作主语时，为了保持句子结构平衡，避免头重脚轻，常用it作形式主语，代替不定式、动名词或从句，而把真正的主语放在句尾。
例如：It is important to learn English well.学好英语很重要。
It took me an hour to finish the homework.我花了一个小时完成作业。
三、it用作形式宾语当不定式、动名词或从句作宾语时，为了保持句子结构平衡，避免头重脚轻，常用it作形式宾语，代替不定式、动名词或从句，而把真正的宾语放在句尾。
例如：I think it is important to learn English well.我认为学好英语很重要。
He found it hard to learn English well.他发现学好英语很难。
四、it用于强调句型中强调句型是英语中一个重要的句型，用于突出强调某个成分，特别是主语、宾语和状语等。
在强调句型中，it没有实际意义，只是起到引导作用。
例如：It is I who am the best student in my class.我是班里最好的学生。
超详细的It的用法归纳总结（附习题及答案）!
超详细的It的用法归纳总结（附习题及答案）!
超详细的It的用法归纳总结（附习题及答案）！
一、It是代词
指除人以外的一切生物和事物，用来指代时间、季节、天气距离、环境。
在这里，i是一个虚词，没有任何实际意义。
例如:
①It is a quarter to eight now.
现在是八点差一刻。
②It is midnight. 现在是午夜。
③It is time for breakfast.
现在是吃早饭的时间。
④-What is the date today?今天几月几号?
--It is December 3rd. 十二月三号。
⑤--What season is it?现在是什么季节?
--It is summer. 夏季。
⑥--What is the weather like today?
今天天气如何?
--It is fine.天气很好。
--It is foggy and wet.天气多雾又潮湿。
⑧How far is it from the bus station to your home? 从汽车站到你们家有多远?
⑨It is around five miles to the shopping center.从这儿到购物中心大约有五英里。
(完整版)It”用法及其句型和固定搭配专练
“ It 用”法及其句型和固定搭配专练"It" 用法及其句型和固定搭配，是高中英语语法的要点、难点，又是近几年高考的热门，所以应赐予充足的重视，现将 it 用法概括以下：一、 It 用作实词表达以下观点 :指代前文提到的事物，前文中的this, that ；代替前文中的内容；指代一位性别不明的小孩或未知的人；指代未指明但讲话两方都知道的那件事；指代时间、天气、天气、距离等自然现象二、 It 用作形式主语代替作主语的从句、动词不定式、动名词，而把真实作主语的从句、动词不定式、动名词置于句尾。
It 作形式主语的常有句型：1.代作主语的动词不定式，其句型为(1) It be adj. (for sb.) to do sth.此处adj. 往常为描绘事件的形容词：easy, difficult, hard, necessary, unnecessary, possible, impossible, likely, unlikely, right, wrong, important, unimportant, legal, illegal, well-mannered, ill-mannered, polite, impolite, clear, obvious, certain, suitable, proper, fit, useful, useless, dangerous例 It is illegal (for a teenager) to drive a car without a license.(2) It be adj. of sb. to do sth.此处 adj. 往常为描绘人的形容词： kind, unkind, nice, rude, cruel, considerate, thoughtful, thoughtless, careful, careless, silly, foolish, stupid, clever, wise, crazy.例 It's kind of you to help me with the problem.(3) It 代替作主语的动名词的常有句型It's no good/use doingIt's (well)worth doingIt's (well)worth one's while doing/to doIt's (well)worth while doing/ to do例 It's no use crying over spilt milk.2. It 代替作主语的从句常有句型(1) It is + noun + 从句例 It is no secret that the president wants to have a second term at office.(2) It is adj. +clauseIt's surprising that(should)居然⋯⋯It's a pity/shame that(should)居然⋯⋯例 It's important that you should apologize to her for your rudeness.(=It's of much importance that you should apologize to her for your rudeness.)(3) It verb sb. + clause= It is v-ing + clauseIt+surprise/delight/interest/disappoint/worry/disturb/annoy/amaze/bother/concern/frighten/please/anger sb. that例 It worried me that she drove so fast.(= It was worrying that she drove so fast.)(4) It verb (to sb.) that= sb/sth verb to do(verb = appear, seem, come about, emerge, follow, chance, happen, occur, transpire, turn out , work out) 例 It (so) happened/chanced that they were out.(= They happened/chanced to be out.)(5)It is v- ed that=sb/sth is to do(verb=say, report, think, believe, hope, expect, agree, accept, decide, determine, intend, plan, understand, know）例 It is said that the couple have gotten divorced.(=The couple are said to have gotten divorced.)(6) It is v- ed that(should)(verb=demand, request, require, order, suggest, advise, recommend例 It is suggested that they should begin with the third question.三、 It 作主语的句型1. It takes sb.to do(=sb takes 某人to用do多长 )时间做某事例 It took the men a week to mend our roof.(= The men took a week to mend our roof.)2. It's (just)(un)like sb. to do（不）像某人做某事的风格例 It was (just) like him to think of helping us.3. It's (about/high) time that-edshould是该/v做某事的时候了例 It's(about/high) time that we should take action.4. It's the x- th time (that)have-ed v第几次做某事了例 It's the third time that he has failed the driving test.5. It is/has been since continuous-ed(持续v性动词 ) 某动作已有多长时间不发生了例 It's 10 years that he lived here6.It was(not) before过( 不)了多长时间某动作发生了例It was not long before they arrived.四、 It 作形式宾语用来代替作宾语的从句、动词不定式、动名词，而把真实作宾语的从句、动词不定式、动名词置于句尾。
it用法汇总(全)
it用法汇总用法一：指代（后行）it1.It的基本用法是用来指代上文所提到的事物。
如：A: Pass me a blue pen. B: Here it is / Here you are.2.指代不明身份或性别的人也用it；指代喜爱的事物或宠物也可用she / he。
A：Who’s it (knocking at the door)? B: It’s me."I didn’t know it was you, comrade Lenin." said the guard.The crowd moves on. No one tries to stop it.Look that lovely baby in the cradle! Oh, dear. It is crying.My car needs some more petrol. Let’s fill her up.China has a history of over 5,000 years old. She is proud of her culture.用法二：虚义it虚义it指用作没有具体语义的主语，如表示时间、天气、距离、温度等概念的用法。
When spring comes, it is getting warmer and warmer.It is cooler in Tianjin than in Beijing.It is only about half an hour’s ride from here to my home.It looks as if the college is very small.It seemed as though our plan would be perfect.用法三：形式it由于句法结构的需要，常用it作形式主语，而把真正的主语放后置。
一、形式主语：不定式、动名词以及主语从句作主语时，为避免“头重脚轻”，要将真正的主语后置。
全面总结It用法及相关语境练习
全面总结It用法及相关语境练习A. It用法第一类：It充当句子的形式主语,代指不定式to do, 动名词v.ing及that 从句。
备注1.(It is) no wonder/surprise+ that cl…难怪……例：It is no wonder that she is so excellentsince she is so hardworking.她学习如此勤奋，难怪她如此优秀。
口语中，no wonder前的it is经常省略；2. It is a pity/shame for sb. to do /that cl.某人做某事令人遗憾。
例:What a big pity it is for him not to makegood use of the chance!他没有好好利用这次机会真是太可惜了！此类句型中的名词还有：a shame,a (big)surprise,sb.’s belief等。
3.It is one’s responsibility/duty to do sth./that cl.做某事是某人的责任。
例：It is everyone’s responsibility/duty torespect and take care of the elderly.尊重照顾老年人是我们每个人的义务职责。
4. It is one’s （great）pleasure / honor to do sth./that cl.某人倍感高兴/荣幸做某事。
例：It is my great honour to give a speech toall of you about building a harmoniousschool!我很荣幸在此做关于创建和谐校园的演讲！例：It is always a pleasure to greet a friendfrom afar.有朋自远方来，不亦乐乎。
it用法归纳与总结
it用法归纳与总结
1. IT可以作为名词使用，表示信息技术（Information Technology），也可以指代IT行业或IT部门。
例如：I work
in IT.（我在IT行业工作）
2. IT可以作为代词使用，表示指示事物、情况或观点。
例如：
I don't understand it.（我不明白它）
3. IT可以作为形容词使用，表示指示事物或情况与信息技术
相关。
例如：IT industry（IT行业）
4. IT可以作为副词使用，表示指示方式、情况或程度。
例如：He did it quickly.（他做得很快）
5. IT可以与其他词组合成固定搭配，表示特定意义。
例如：
IT infrastructure（IT基础设施）、IT skills（IT技能）
总结起来，IT通常作为名词使用，表示信息技术，同时也可
根据上下文的不同作为代词、形容词或副词使用。
在IT领域，常用的短语和搭配也有特定的含义。
it的用法及强调结构(附常见考点解析及精选练习题)
it的用法及强调结构I. 作代词1. 用作人称代词，代替前文提到过的事物（是同一物）。
My pen is missing. I can’t find it anywhere.I was disappointed with the film. I had expected it to be much better.2. 代词it有时不特指某件东西，而代表前面提到的整个事情。
Tom’s mother kept telling him that he should work harder,but it didn’t help. (but连接两个并列分句，而不是非限制性定语从句，用it)The weather turned out to be very good,which was more than we could expect. （前面用逗号隔开，没有并列连词，是非限制性定语从句，which指代前面整个主句所表达的内容，用which不用it）3. 用来代替指示代词this,that.--- What’s this ?--- It’s a book.4. 表示时间、距离、天气、价值等。
It’s ten o’clock now.（指时间）---How far is it from here to the station?---It's about two kilometers.（指距离）It is rather cold today, isn't it?（指天气）---What's the cost of the dictionary?---It is twenty dollars.（指价值）5. 可用来指做某个动作的人或与某事有关系的人。
---- Who is making such a noise ? --- It must be the children.II. 引导词it1. 作形式主语，代替由不定式短语、动名词短语或从句表示的真正主语。
单词it用法及练习
单词it用法及练习一、it 作人称代词的用法1.指事物作为人称代词，it 可以除人以外的一切事物或动物。
如：I dropped my watch and it broke. 我把手表掉在地上摔坏了。
It’s hard work, but I enjoy it. 工作很辛苦，可是我乐意干。
“Where is the dog?”“It’s in the bedroom.”“狗在哪?”“在卧室里”。
2.指人it 指人主要用于指不性别不明的婴儿或用于确认某人的身份。
如：Is it a boy or a girl? 是男孩还是女孩?There is a knock on the door. It must be the postman. 有人在敲门，一定是邮递员。
【说明】在答语中，常用来指本人，如说It’s me。
3.代替某些代词代词it 还可用于代替指示代词this, that 以及复合不定代词something, anything, nothing等。
如：“What’s this?”“It’s a new machine.”“这是什么?”“是一种新机器”。
Nothing is wrong, is it? 没出什么问题，是吗?二、it 作非人称代词的用法1.基本用法it 作非人称代词的用法，主要用于指时间、距离、价值、天气、气候及温度等自然现象。
如：It’s too late to go there now. 现在去那儿已经太迟了。
It rained all day yesterday. 昨天下了一天的雨。
It can get very hot here. 这里有时会很热。
2.用于某些句型It’s time for sth. 该做某事了。
It’s time to do sth. 该做某事的时候了。
It’s time for sb to do sth. 某人该干某事了。
It’s (about / high) time + that-从句. 某人该做某事了。
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It 的用法（专项总结及训练）一、人称代词1，it 的最基本用法是作代词，主要指刚提到的事物，以避免重复:①They watched the train until it disappeared in the distance.2. ，也可以指动物或婴儿（未知性别的婴儿或孩子）:②Is this your dog ？No, it isn ' t.③They got a baby and it was a ten-pounder3. ，也可指抽象事物或指抽象环境和情景:③ I hate it when people talk with a full mouth. ．二、.非人称代词1.it 有时并不指具体的东西而泛指天气、时间、日期、距离、价值、度量、温度、环境等⑴ .指天气：It is a lovely day, isn it? 't⑵ .指时间: It was nearly midnight when she came back.⑶.指日期：lt is April First today.⑷ . 指距离:It is some 3000 kilometers from Beijing to Guangzhou.⑸ . 指价值：lt is three dollars.⑹ . 指温度：Today it is 30 degrees centigrade.三、其他用法1. 在句子的主语不太明确时充当主语，表示谁在做某事：①Who is it there? It's I （me/you/he.....）.②l thought it was Mary, but it was not she.③Her face lighted when she saw who it was.2. 泛泛的指某件事：（有时泛指一般情况）①It doesn ' t matter.②It is a shame, is n it? ' t③How is it going?（情况怎样）④It says in the n ewspaper that .3.it 用在一些词组中，it 没有特别的意思The last train's gone. Come on, we'll foot it.（来，咱们步行吧。
）四、作形式主语，替代主语从句，动词不定式，或动名词短语：1. 作形式主语替代主语从句⑴It is clear （ obvious , true, possible certain....） that 从句常译为清楚的（显然的，真的，可能的,肯定的．．．）＂It is very clear that he ' s round and tall like a tree.= That he' s round and tall like a tree is very clear.⑵ It is important （ necessary , right, strange, natural...） that 从句常译为…是重要的（必要的，对的,奇怪的，自然的…）.that后的从句中要用虚拟语气（should +动词原形），should 可以省去，建议记住该句型中的形容词。
①It is important that we （should） learn English well.②It is n ecessary that he (should) remember these words.⑶ It is said (reported/ learned/believed/thought/known/told/hoped..…)that 从句常译为＂据说(据报道，据悉．．．)＂。
①It is said that he has come to Beiji ng.②It is reported that ano ther earth satellite has bee n put into orbit.⑷ It is suggested ( advised/ ordered / demanded/ insisted/ commanded... ) that 从句.that后的从句要用虚拟语气(should +动词原形)，should可以省；常译为"据建议；有命令．．．)①It is suggested that the meeti ng ( should ) be put off.②It was ordered that we ( should ) arrive there in two hours.⑸It is time ( about time ，high time ) that从句(虚拟语气：动词用过去时did)①It is time that children went to bed.②It is time you bought a new car.③It is (high ) time you made up your mind.⑹ It is the first ( second ... ) time that 从句(从句用现在完成时have done )It was the first ( second ... ) time that 从句(从句用过去完成时had done )常译为＂是第一(二)．．．次．．．＂。
It is the first time I have been here. = This is the first time I have been here⑺ It is a pity ( a shame /an honour/a good thing/a fact,/a surprise/... ) that 从句.that后的从句一般用虚拟语气(should +动词原形)，should可省去•表示出乎意料，常译为＂竟然＂。
没有这种意义时，则不用虚拟语气。
①It is a pity that such a thi ng ( should ) happen in your class. 这种事竟然发生在你们班上，真是遗憾！②It is a pity that he is ill. 他生病了，真遗憾！⑻It happens (seems, looks, appears ) that从句.常译为“碰巧…，似乎是…，看起来…”①It happened ( so happened ) that he met his teacher in the street.碰巧...②It seems that he will be back in a few days. 看来...2. 作形式主语替代不定式.⑴It is kind ( of sb. ) to do sth.不定式的逻辑主语是由of引起，主句中的形容词必须是能表示逻辑主语特征的褒义或贬义形容词。
常见的词有：bad , brave , careless, clever , cruel , foolish , good (好心的)，honest , horrible , kind , lazy , modest , naughty , nice (有教养的)，polite , rude , silly , stupid , wise , wrong (错误的)等。
这个句型可以改写为：sb. is kind to do sth. 。
女口:It is kind of you to say so. = You are kind to say so.⑵It is necessary ( for sb. ) to do sth.不定式的逻辑主语是由for引起，主句中的形容词通常是表示重要性紧迫性频繁程度难易安全等情况的中性形容词。
常见的形容词有：important necessary natural easy safe common normal hard difficult dangerous unusual rare impossible pleasant女口:It is importa nt for her to come to the party. = It is importa nt that she (should ) come to the party.⑶It takes sb. ... to do sth.常译为"做...要花费某人.女口:It took thousands of people many years to build the Great Wall.3. 作形式主语替代动名词短语It is no good / no use / useless doing sth.常译为■-有好处或没有用”①It is no good lear ning En glish without speak ing En glish.②It's useless trying to argue with Shylock.五、作形式宾语，代替不定式，动名词短语或宾语从句。
We think ^important to learn a foreign language.该句型中的it作形式宾语，该结构中常用的动词有：think, believe, make ,find consider,feel；如：We thi nk it our duty to clea n our classroom every day.He felt it importa nt lear ning En glish well.They found it difficult that they would finish their work in two days.The Internet makes it easier for compa nies to keep in touch with customers.六、.it的重要句型1.强调句型：It is/was +被强调部分+ that从句(被强调的主语如果是人，that可以由who换用)①It was about 600 years ago that the first clock with a face and an hour hand was made.②It was they that (who ) clea ned the classroom yesterday.③It was in the street that I met her father.④It was yesterday that I met her in the street.⑤It is you that /who are wrong.特例:It is not until +被强调部分+ that ...该句型也是强调句型。