it的用法练习
It的用法
“It” 的用法1.“it”作代词。
“it”可替代物、动物、抽象事物，还可以代天气、时间、距离、环境、温度等。
也可指代上下文提到的事物或某种情况，以及不明身份、性别的人和小婴儿，也可用于电话用语中替代this或that。
E.g. ① It's fine today.(weather)② It's hot today. (temperature)③ It's four o'clock now. (time)④ It's only 200 metres from my home to our school.(distance)⑤ It's noisy outside.(circumstance)⑥ --Who is knocking at the door?--It must be John.(an unknown person)⑦ --Who is it speaking?--It's Mary.(making a phone call)2.“it”作形式主语。
（1）It be +adj. +(for sb.)+ to do sth.此处的adj.为描述事物的形容词。
如：easy, hard, difficult, necessary, possible, impossible, likely, right, wrong, important, etc.E.g. ① It's easy for us to climb the hill.② It's difficult for me to work out the maths problem.(2) It be +adj.+(of sb.)+to do sth.此处的adj.为描述人的形容词。
如：kind, nice, rude, cruel, careful, careless, silly, foolish, stupid, wise, crazy, etc.E.g. ① It's kind of you to help me with this problem.② It's foolish of you to believe in such a person.③ It's wise of you to choose to study abroad.(3). It be + adj.+ doing sth.It's no good/use doing sth.It's (well) worth doing.E.g. ① It's no good arguing with him.② It's no use crying over spilt milk.③ It's no good drinking too much wine.(4) It be +adj./n. +Clause.It's a pity that…It's a fact that…(It's) no wonder that…It's obvious that…It's certain that…It's strange/important/necessary that…(要用虚拟语气）(用should+动词原形)It worries/surprises sb. that…It seems/appears that…It turned out that…It (suddenly) occurred to sb. that…It strikes/struck sb. that…It's said/reported/believed… that…It doesn't matter whether…It makes no di fference whether…(5)其它句型。
代词it的用法
代词it的用法
1. “It”可以用来指代天气呀！比如说：“It's really sunny today.”
哎呀，想想当你抬头看着那湛蓝的天空和灿烂的阳光，说这句话的时候是不是感觉心情都超好呢！
2. 你知道吗，当我们想指代某件事情的时候，也会用到“it”呢！就像“Making a handmade gift for her is a great idea. It will make her very happy.”这里的“it”就是指做手工礼物这件事呀，难道不是很有趣吗？
3. 当我们谈论时间的时候，“it”也大显身手啦！像“Look at the time!
It's getting late.”天哪，看到时间流逝，说这句话时是不是会有点小紧张呢！
4. “It”还能指代某个动物或物品呢。
“I love my dog. It is so cute.”看
到可爱的狗狗，用“it”来指代它，是不是感觉特别亲切呀！
5. 有时候我们也会用“it”来表示一个情境或局面哟！比如“Things are getting complicated. It's not that easy.”哇，面对复杂的情况，说出这
句话是不是很有感慨呢！
6. 想象一下，我们在描述距离的时候也能用“it”呢！“The distance between us is not that far. It can be easily covered.”哎呀，想到能跨越那不远的距离，是不是有点小期待呢！
我觉得“it”的用法真是丰富又有趣，在我们日常交流中起到了很重要的作用呢！。
it的用法
8. It was a dark and stormy night when the old man started his journey.
“It” is can be to talk In this sentence, “it” used
about time.
used in another way?
1. It + is + adj./ n./ p.p. + infinite/ clause/ -ing form
formal subject
real subject
clear, easy, true, difficult, certain, etc.
fun, a pity, a shame, no use / good, etc.
4. I think it best that you should do more a clause exercise.
5. He found it difficult to accustom himself
to getting up early. an infinitive
The otoo old to learn.
活到老, 学到老。
2. It rains cats and dogs.
大雨滂沱
3. It never rains but it pours.
不鸣则已, 一鸣惊人。
4. It is a poor mouse that has only one hole.
said, believed, decided, hoped, etc.
遵循英语语言 的尾重原则, 1. It’s difficult to give up smoking. 避免句子头重 2. It is fun for him to study. 脚轻。 3. It is suggested that we (should) arrive there in 2 hours.
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。
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。
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的用法和练习(带答案)
重点代词it的用法和练习(含答案)(1)it用做人称代词的用法it用作代词，意为“它”，既可以指人，也可以指物。
it做人称代词，可以用来代替一个名词、短语、从句或句子，以避免他们在句中的重复。
这是可以指提到过的，也可以指未提到的，在句中做主语、表语和宾语。
1) 指事物，it可以知道除人以外的任何事物或动物。
I dropped my watch and it broke.我把手表掉在地上摔坏了。
2) 指人，it主用用于指性别不明的婴儿或只听其声不见其人的人，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.“Liste n. Some one is cryin g.. ”“Oh, it must be Mary. ”3) 代替某些代词。
代词it可以用于代替指示代词this, that以及复合不定代词something, anything, nothing等，如：“What' s this?”“ It' s a new machine”(2)it用作非人称代词的用法1) it用作非人称代词主要用来指时间、距离、价值、天气、气温及温度等自然现象。
如It' s too late to go there now.现在去那已经太迟了。
It rained all day yesterday昨天下了一整天雨。
2) 用于某些句型。
It' s time for sth.该做某事了。
It' s to do sth.是时候该做某事了。
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。
(从句谓语用过去式，有时候用should+ 动词原形)It' s first(second)time +that--从句。
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。
it的用法
it的用法(1)it作无人称代词：it作无人称代词表示自然现象、气候、时间、距离等。
it是形式主语没有词汇意义。
如：1)It is very cold today．(气候)2)It is three o'clock．(时间)3)It is along way from here．(距离)(2)it作人称代词：it作人称代词时，用来代替上下文中提到的事或物，有时可代替整个句子的内容。
(3)his(was)+形容词十不定式(to do)，it为形式主语，不定式短语为真正主语。
(过去分词)(4)his+{形容词}+that(what，how，whether．．．)，it为形式主语，that 引导的为主语从句。
(名词)(5)It+不及物谓语动词+that引导的主语从句。
这些动词有：seem，appear，turn out，follow，happen等。
(6)It may well be that引导的主语从句。
(7)it作形式宾语：1)某些及物动词+it+形容词十不定式；2)某些及物动词+it+形容词+that...在上述两种句型中，it是形式宾语，真正的宾语是不定式短语，或that 引导的宾语从句。
(8)it用于强调句型：It is(was)十被强调的成分+that(which，who)强调句型是简单句，可以用来强调句中主语、宾语和状语，但不能强调定语和谓语。
在这种句型中把his．．．that去掉，句子仍成立。
代词在句中分析与翻译的实例1．All the various transitions from one form of motion into another are governed by one ofthe fundamental laws of nature，that of the eternity of matter and its motion．运动可以由一种形式变为另一种形式，所有运动形式的变换都取决于一个基本的自然规律，即物质及其运动永恒性的规律。
It句型及倒装句
“It”用法及其句型和固定搭配一、It用作实词表达以下概念:指代前文提到的事物，前文中的this, that；替代前文中的内容；指代一位性别不明的小孩或未知的人；指代未指明但谈话双方都知道的那件事；指代时间、天气、气候、距离等自然现象……二、It用作形式主语1. It替代作主语的从句常见句型(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)………竟然……It's a pity/shame that…(should)………竟然……(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 …(4) 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） (5) It is v-ed that …(should)…(verb=demand, request, require, order, suggest, advise, recommend 例 It is suggested that they should beg in with the third question.三、It作主语的句型1. It's (just)(un)like sb. to do某人的风格2. It's (about/high) time that… should /v-ed…3. It's the x-th time (that) … have v-ed…4. It is/has been… since …continuous v-ed(延续性动词) 某动作已有多长时间不发生了5. It was(not)…before…例 It was not long before they arrived.四、It 作形式宾语用来替代作宾语的从句、动词不定式、动名词，而把真正作宾语的从句、动词不定式、动名词置于句尾。
It 的用法
It 的用法在英语中，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），也可以用做引导词（作形式主语或形式宾语），还可以用来构成强调句型等。
一、It 用做人称代词1.It 可用作人称代词，指前面已经提到的事物，动物或人,指人主要用于指性别不明的婴儿或用于确认某人的身份。
He bought a dictionary and gave it to me.The bady is crying. It might be hungry.Someone is ringing. Who might it be?Professor Lee gave us a lecture yesterday. It was of great interest.【说明】在答语中，常用来指本人，如说It's me。
二、It 用作指示代词1.在"It is/was+表语"结构中，it指明某人或某物的身份，如：①—Who is there downstairs? —It's the postman.②—Who is there talking? —It's your father.2.指代this 或that以及复合不定代词something, anything, nothing等。
①—What's that on the desk? —I guess it might be a robot.②This is your plan, isn't it? ③Nothing is wrong, is it?三、It 用作非人称代词It 用作非人称代词，常指代天气，季节，距离，时间或事物的状态。
It was raining when I left the office.It's February 14th today. It's a long time since we met last time.It's an hour's walk from my home to the school.It's so noisy in the room.四、It 用作形式主语当不定式、动名词、从句等复杂成分用作句子主语时，为保持句子平衡，通常把真正的主语放在句末，而在句首使用形式主语it。
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的用法
it的用法1.It用作代词:用来指代前面提到的事情，是单数。
(1)用作人称代词，代替上文提到的人或事物。
e.g. ——Who is it?——It’s me. You’ve helped me a lot; I’ll never forget it.(2) 用以代替指示代词this或that。
e.g. ①——What’s this?——It’s a computer．②——Whose book is that?——It's hers．(3)表示时间、天气、距离、价钱等。
e.g. It’s time for lunch．It’s raining hard．It’s two miles from the school to our home．(4)在不清楚性别的情况下也可以用来指代人。
e.g. ——Someone comes to visit you at the gate of the school.——Who is it?2. it作形式主语（1）It is + difficult/ hard / easy / important / necessary + for sb. to do sth. 干某事对某人来说是怎么样的。
（2）It is + kind / good / nice / clever of sb. to do sth. 某人做某事是怎么样的。
e.g. It is useful for you to learn English well.It’s too hard to understand spoken English.It is important for us to protect the environment.It’s very kind of you to help m e.（3）主语从句：that引导的主语从句既可放在句首，也可放在句末。
但是为了保持句子的平衡，常用it作形式主语，把真正的主语从句放在句后；e.g. That he is a doctor is true.=It is true that he is a doctor.It is surprising that she is so angry.That he survived the accident is a miracle.=It is a miracle that he survived the accident.①It + be +名词+ that从句；e.g. It is a fact that…It is common sense that…It’s a pity/a shame/a question/ an honor/a wonder…that…②It + be +形容词+ that从句；e.g. It is certain/clear/evident/likely/probable/better/natural that…③It + be +过去分词+ that从句；e.g. It is said/demanded/believed/reported/estimated that…④It +不及物动词+ that从句e.g. It seems/happened/follows/matters/occurred to me/struck to me that…(4) It is + 序数词+time that从句（用现在完成时）.It was + 序数词+time that从句（用现在完成时）.e.g. It is the first time that I have seen the movie.It was the third time that Tom had come to the place.(5)专题练习①It is high time _______ us to do something to improve our environment.②It is the first time that the girl ____________(see)a panda.③Believe me, I know how easy it is to begin smoking and how tough _______ is to stop.④It is no use _________ （argue )with Bill because he will never change his mind.3. it作形式宾语(1)find / feel / think+ it + 形容词+ to do sth. 发现/感到/认为干某事是怎么样的e.g. Why did Wei Fen find it difficult to learn English?I find it difficult (for Lily) to learn math well.=I find that it is difficult for Lily to learn math well.Wang Dan found it important to learn English well.(2)宾语从句：如果宾语后跟有补语，常用it作形式宾语，而将从句放到补语之后；e. g. They kept it quiet that he was dead.I heard it said that the meeting would be postponed.(3)专题练习①We find ___necessary to work hard to achieve our dream.②Susan made ________ clear to me that she wished to make a new life for herself.③I would appreciate it _____ you could let me know in advance whether or not you will come.4. it用于强调句型中，其结构是: It is / was + 强调部分+ that + 原句剩余部分。
it的用法、常用句型
I’d prefer it if I didn’t have to do so much
work.
I would appreciate it very much if you would
help me with it.
b. 动词+介词+ it + that从句 能用于此句型的主要有：depend on, answer for, see to。如： You may depend on it that he will turn up in time.
reputation of an honest man.
It was no accident that such a book should
appear in the 18th century. 2) “It + be +形容词+主语从句”中从句谓语常用 “（should +）动词原形（或完成时）”。常用 于本句型的形容词主要有impossible, strange,
2. —Steven’s parents have bought him a computer.
—__I_t _ __is__ __n_o_ _w__o_n_d_e_r_ (难怪) that he looks so happy.
3. Susana’s aim is to tell all citizens they have a duty to protect the environment, _is_n_’_t_ __it_ (对吗)?
2. Raise your leg and let 65 stay in the air for seconds. （辽宁2014第三部分）
It用法练习题及答案
It的用法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“单项填空”进行，偶尔也出现在“短文改错”和“完形填空”中.一、要点点拔1．代替上文中提到过的人或事物。
指代人时，一般用于小孩或身份不十分明朗的人。
1) －Who is the baby？－It‘s my teacher’s son．2）－Who is that gentleman？－It's my friend Tom．He(不可用It）wants to see you．2．用于表达天气、环境、时间、距离、季节等。
例如：1）It’s half an hour's walk from here to our school．2）It‘s nice and warm here．3）But it's two o’clock now，and it’s time for us to go to school．3．用作形式主语。
it 没有具体意义，而只是帮助把真正的主语移至句子后尾，使句子显得平稳一些，能借it 给移至句子后尾的主语有三种：一种由不定式表示，一种由动名词表示，一种由从句表示。
1）。
It 替代真正的主语-—动词不定式短语。
It is easier to say than to do 。
It is a good act to help the others。
2）.it 替代真正的主语—-动名词短语，以动名词短语做主语的句子，主要在以no good，no use, no harm，dangerous, foolish 等词作表语的句中.It’s no harm drinking running water in that area。
It’s foolish talking like that。
3).it 替代从句作主语，用从句做主语的带it 的句子很多，常见的有下面几类:①It is a pity (a shame ，a fact ，a wonder ,a good thing,etc. )that…It is a shame that he didn’t pass the exam.②It is strange ( surprising,obvious ,true，good，possible，clear，etc. ）that…。
it在句子中的用法
it在句子中的用法it是英语中一个非常常见的代词，可以使用在不同的句子中，具有多种不同的用法和含义。
下面就是it在句子中的用法。
1. 代替可数名词和不可数名词- The book is interesting. It is about wild animals and their habitats.（这本书很有趣。
它是关于野生动物及其栖息地的。
）- I have some homework to do. It will take me about an hour to finish it.（我有一些作业要做。
完成它大约需要一个小时。
）2. 代替某个动作或事件3. 引导主语从句it可以用来引导主语从句，这种用法通常出现在形式主语或虚拟主语结构中，如：- It is important that we arrive on time.（我们准时到达很重要。
）- It is a good idea to study abroad.（出国留学是个好主意。
）4. 引导强调句it可以用来引导强调句，这种用法通常是通过强调it来强调该句的其他部分，如：5. 表示指代前文的内容it可以用来表示指代前文中的某些内容，如：6. 隐含主语it可以用来代替在英语中需要有主语却不需要在口语和书面语中明确表达的动词，如：7. 表示时间- It’s twenty past seven.（现在是七点二十分。
）- It’s almost midnig ht.（现在快到午夜了。
）这种用法通常跟着时间词组或时间副词，表示一段特定的时间。
8. 表示天气it可以用来表示天气以及与天气有关的事情，如：这种用法通常可以根据对身体的感受或外部环境的描述来描述天气状况。
9. 引导介绍句it可以用来引导介绍句，用于介绍对话框架中的人或事，如：- It's my pleasure to introduce you to our chief executive officer, Mr. Brown.（很荣幸向你介绍我们的首席执行官，布朗先生。
IT的用法
一、It用作代词：指代时间、天气、气候、距离，人或物，金钱，度量，价值，地点等→It is a book.→It is ten thirty.→It is sunny today.→It is five kilometers.→It is worth 5 yuan.→It is getting warmer and warmer.二、It用作形式主语替代作主语的从句、动词不定式、动名词，而把真正作主语的从句、动词不定式、动名词置于句尾。
→It is hard to learn English well.→It is important to be polite.It 作形式主语的常见句型：1. 代作主语的动词不定式，其句型为（1）It be adj. (for sb.) to do sth.→It is important for us to learn English well.（2）It be adj. of sb. to do sth.→It is kind of you to help me.（3）It替代作主语的动名词的常见句型：It’s no good/use doing…→It is no good smoking a lot.It’s (well)worth doing…→It is worth considering.2. It替代作主语的从句常见句型（1）It is + noun +that从句→It is a pity that he passed away in the accident.（2）.It is adj. +that--clause→It is important that we should help each other.→It is necessary that we should pay attention to the earthquake.（3）It verb sb. + that--clauseIt+surprise/delight/interest/disappoint/worry/disturb/annoy/amaze/bother/ concern/frighten/please/anger sb. that…→It surprised me that he died of cancer.→It worried her parents that he drank a lot.（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）→It is said that he will come to see me.→It is reported that there is a huge earthquake in Japan.→It is known that China is a developing country.四、It 作形式宾语用来替代作宾语的从句、动词不定式、动名词，而把真正作宾语的从句、动词不定式、动名词置于句尾。
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。
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It 的用法练习（1）
（）1. ______ was known to them all that William had broken his promise _____he would give each of them a gift.
A. As; this
B. that; it
C. It; that
D. It; which
（）2. ______ is our belief that improvements in health care will lead to a stronger, more prosperous economy. （2006 浙江）
A. As
B. That
C. This
D. It
（）3.New technology have made _____ possible to turn out new products faster and at a lower cost. （2012四川）
A. that
B. this
C. one
D. it
( )4. No matter where he is, he makes _____ a rule to go for a walk before breakfast. （2012陕西）
A. him
B. this D. that D. it
( )5.We feel _____ our duty to make our country a better place. (2011天津)
A. it
B. this
C. that
D. one
( )6. Why don’t you bring ____ to his attention that you’re too ill to work on?
(2011江西)
A. that
B. it
C. this
D. him
( )7. The two girls are so alike that strangers find ____ difficult to tell one from the other. (2011山东)
A. it
B. them
C. her
D. that
( )8. The cost of renting a house in central Xi’an is higher than ____ in any other area of the city. （2010 陕西）
A. that
B. this
C. it
D. one
( )9. — There is still a copy of the book in the library. Will you go and borrow ______?
—No, I’d rather buy _____ in the bookstore. (2007陕西)
A. it; one
B. one; one
C. one; it
D. it; it ( )10.—Who’s that at the door?
— ________ is the milkman. (2014全国卷)
A.He
B. It
C. This
D. That
( )11.Susan made ______ clear to me t hat she wished to make a new life for herself. (2014山东)
A. that
B. this
C. it
D. her
( )12. I'd appreciate ______ if you could let me know in advance whether or not you will come. (2014陕西)
A. it
B. you
C. one
D. this
( )13. An average of just 18 .75 cm of rain fell last year, making _____ the driest year since California became a state in 1850. (2014浙江)
A. each
B. it
C. this
D. one
( )14. How would you like ______ if you were watching your favorite TV program and someone came into the room and just shut it off without
asking you? （2015浙江）
A. them
B. one
C. those
D. it
( )15. How would you like ______ if you were watching your favorite TV program and someone came into the room and just shut it off without
asking you? （2015浙江）
A. them
B. one
C. those
D. it。