代词及It用法
it的用法
语法：it的用法一.it 作人称代词1.it的最基本用法是作代词，指代前面所提到过的事情、事物、群体、想法，也可以指代未指明但谈话双方都明白的事情或情况。
如：The Parkers bought a new house but it will need a lot of work before they can move in.---I have broken a plate.---It (Breaking the plate) doesn’t matter.2.it也可以指代性别不明或性别被认为不重要的人或动物。
如：---Is it your dog？---No, it isn’t.二.it 作非人称代词1.指时间It is half past two now.2.指距离It is 6 miles to the nearest hospital.3.指温度It is very cold in the room.4.指天气A lovely day, isn’t it?/ It is a bit windy.5.指日期---What’s the date today? --- It’s May 1st, 2014.6.指季节It is winter now.7.指环境It was very quiet in the café.8.指价值---What’s the price of the T-shirt？---It is 150 yuan.三.it作形式主语1.it替代作主语的动词不定式（to do）(1) It be + adj. + (for sb.) to do sth.此处adj.通常为描述事件的形容词：easy, difficult, hard, necessary, possible, right, important, polite, clear, obvious, useful, dangerous, legal, illegal等。
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。
it的用法归纳
it的用法归纳
1. 代词：it可以代替前面出现过的事物、物品、动物等，做主语、
宾语、表语等。
例句：I saw a bird in the tree. It was singing beautifully. （我看见了一只鸟在树上。
它唱得很美。
）。
2. 指示代词：it也可以作为指示代词，用来指代某一事物或物品。
例句：I want this book, not that one. Give me it.（我想要这
本书，不是那本。
给我它。
）。
3. 不定式：it可以作为不定式的形式，表示“它”的含义，一般表
示时间、天气等。
例句：It’s nice to see you again.（很高兴再次见到你。
）。
4. 表示真理或存在：it可以用来表示某件事或事物的存在或真相。
5. 表示强调：it可以作为强调句的主语，强调句子中重要的信息。
例句：It was him who broke the vase, not me.（是他打破了花瓶，不是我。
）。
6. 虚主语：it可以作为虚主语出现在句首，表示无人称、无性别的
动作或状态。
(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用法
三 it作形式宾语
1.动词+ it + 形容词/名词+（ for sb +）to do
think, believe, suppose, consider, feel, make, Keep … + that 从句
The two girls are so alike that strangers find_____ difficult to tell one from the other. A. it B. them C, her D. that
It 用法归纳
一， 指代it
二， 形式it 三，含有it的句型 四，强调it
一，it作代词
1.用来指代上文提到的事物。
The train has arrived.It arrived half an hour ago.
2. 表示时间，天气， 距离，温度等。
1.It was cold yesterday.
•`9.It替代作主语的动名词 It‘s no good/use doing… It's (well)worth doing…
例 It's no use crying over spilt milk.
`10. It takes sb. ... to do sth. “做．．．要花费某人．．．”。
that 后的从句中要用虚拟语气（should + 动词原形。
It is important that we (should) have enough rice. It is necessary that he (should) remember these words.
形式主语
3. It's surprising that… (should)…… …竟然……
人称代词it的用法总结
人称代词it的用法总结人称代词在英语中起着非常重要的作用，它们可以替代特定的名词或名词短语，以避免过多重复。
其中一个常见的人称代词就是"it"。
下面将详细总结"it"在不同情况下的用法。
一、指示事物或物体1. 指代单数名词：当我们第一次提到某个具体事物或物体时，可以使用"it"来指代。
例如：- Look at the beautiful flower! It is in full bloom.- The new car is expensive, but it's worth every penny.2. 指代抽象事物：当我们谈论关于天气、环境或其他抽象概念时，也可以使用"it"来指代。
例如：- It is raining heavily today.- It seems that there will be a storm tonight.3. 表示距离或方位：当我们谈论远处或方向时，常使用"it"来表示。
例如：- I can see the lake from here. It looks beautiful.- Turn left at the next intersection. It's just around the corner.二、指示时间和日期1. 表示时间：当我们描述时间时，可以使用人称代词"it"。
例如：- Is it already 10 o'clock? We need to hurry.- It's late, we should go home now.2. 指示日期：当我们谈论某个具体的日期时，也可以使用"it"。
例如：- I have an important meeting on Friday. It's going to be a long day.- The party is on Saturday night. It starts at 8 o'clock, so don't be late.三、指代动物和婴儿1. 指代动物：当我们不知道或不关心动物的性别时，可以使用"it"来指代动物。
“it”用法总结
3). It is necessary ( for sb. ) to do sth. 常见的形容词有：① important， necessary， natural ② easy ， safe ，common ，normal ，hard ， difficult ,dangerous ， 等。 在①中的形容词作表语可以用从句改写， 如： It is important for her to come to the party. = It is important that she (should ) come to the party.
③被强调部分为人时，可用who(主格或宾格)和 whom(宾格)代替that，用that也行。 1) It was your father that/whom /who I met in the street yesterday． 2) It was I that/who met your father in the street yesterday．
3.2.作形式主语替代不定式
1). It takes sb. ... to do sth. ＂做．．．要花费某人．．＂ It took thousands of people many years to build the Great Wall.
2). It is kind ( of sb. ) to do sth. 主句中的形容词必须是能表示逻辑主语特征的形容词。 常见的有： bad ， brave ， careless， clever ， cruel ， foolish ，stupid ， wise wrong等。 这个句型可以改写为：sb. is kind to do sth. 。 It is kind of you to say so. = You are kind to say so.
代词it的基本用法 it
C-代词it的基本用法知识梳理代词it一.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可以指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.“Listen. Someone is crying.” “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, anyth ing, nothing等，如：“What’s this?” “It’s a new machine.”二.it用作非人称代词的用法1)it用作非人称代词用来指时间、距离、价值、天气、气温及温度等。
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 time 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。
It’s first(second)time +that--从句。
某人第几次干某事。
（从句谓语动词用现在完成时）It’s +时间段+since从句。
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代词及It用法代词是代替名词的词，英语中代词有人称代词、物主代词、反身代词、相互代词、指示代词、不定代词、疑问代词、连接代词和关系代词等九种。
一、人称代词：(一)概述表示“我(们)”、“你(们)”、“他/她/它(们)”等的词叫人称代词，它有人称、数和格的变化，其形式列(二)人称代词的句法功能：人称代词在句中的功能是通过“格”表现出来的，不同的格表明人称代词在句中有不同的句法功能。
如：1、主格形式作主语和表语。
He was late yesterday.昨天他迟到了。
They went to the cinema together.他们一起去看电影去了。
She and I are very good friends.我和她是很要好的朋友。
---Is that Mr. Smith? 是史密斯先生吗？ ---Yes, this is he.(电话用语) 是的。
It might have been she.那或许是她。
【注】①在非正式英语，尤其是口语中，人称代词作be的表语时，通常可用其宾格形式代替主格。
如：---Who is it? 谁呀？ ---It’s me.是我。
②to be + 人称代词作主语的补足语时，人称代词用主格，作宾语的补足语时用宾格。
如：I was thought to be she.人们认为我是她。
= They thought me to be her.2、宾格形式作宾语(动词的宾语或介词的宾语)。
I bought a present for them. = I bought them a present.我给他们买了件礼物。
Mind you, this is just you and me.听着，这事只能你知我知，绝不可外传。
3、在比较状语从句中，在不引起误解的前提下，有时用宾格代替主格(尤其其后有同位语“all”时)。
He is taller than I (或me).他比我高。
He is taller than us all.他比我们都高。
【注】若可能引起误解，就不能用宾格代替主格。
如：He loves you more than I.他爱你胜过我爱你。
He loves you mare than me.他爱你胜过爱我。
4、用来表示感叹时，常用宾格形式。
Dear me! 哎呀/天哪! = Goodness me!(三)代词排列次序(1—每一人称；2—第二人称；3—第三人称)1、单数：通常按2,3,1或是3,2,1人称排列。
如：Mary and I are classmates. You, he and I are good friends.2、复数：通常按1,2,3人称排列。
如：We, you and they have been invited to the party.Both we and they happened to be there.3、第三人称男女两性并用时，男先女后。
如：He and she still don’t quite agree to this plan.4、承认过失，表示不吉祥的事，或有不好的意思时，单数按1,3,2人称排列，复数按3,2,1的人称排列。
It was I and Tom that broke the window.I, he and you will be punished for being late.They, you and we should leave there at once.(四)he和she的特殊用法：he(他)和she(她)除了用来指代男人和女人外，还可用来指代动词或无生命的东西：he可指代雄性动物或庞大而又威猛之物。
如：Is the kitty a he or she? 这只小猫是公的还是母的？The cat is playing with his own tail.那只猫在玩自己的尾巴。
The moon loses her brilliance when the sun makes his appearance.太阳升起时，月亮失去了它的光辉。
【注】人们常用she/her来指代如船只、汽车、飞机、国家、城市等无生命的东西，以表达其喜爱或亲切之情。
如：---How’s your new car? 你的新车怎么样？---Terrific. She’s going like a bomb.好极了，劲儿象炸弹一样足。
(五)it的用法：It主要有两种用法：作代词和引导词用。
1、作代词：(1)、作人称代词，代替前面提到的事物或身份不明的人。
在性别不详或性别无关紧要时，也可指动物或小孩（或婴儿）。
如：I was disappointed with the film. I had expected it to be much better. (NMET 93)Someone is ringing the doorbell. Go and see who it is. (2000上海高考)Aluminum looks heavy but actually it is very light.铝看起来重，但实际上它却很轻。
China is a large country. It lies in the east of Asia.中国是一个大国，它位于亚洲东部。
Boys and girls, the terminal examination is coming. You must be ready for it.同学们，期末考试快到了。
你们必须做好考试的准备。
Please go and get my dictionary; it is right on the desk; have you seen it?请去把我的词典拿来；就在书桌上；看见了吗？The scientific worker trained a fish to expect its food when it heard the sound of a whistle.这位科学工作者训练一条鱼听到哨声便想进食。
---My brother has only one child. 我兄弟只有一个孩子。
---Is it a boy or a girl? 是男孩还是女孩？【注】①it与one, that的区别：one表示同类的但不是同一个，且只能代替前面的可数名词，相当于“a/an + 名词”；that表示同类的能够是同一个，且常接后置定语；it表示的是前面同一事物，目的是为了避免重复，可换为“the + 名词”。
如：The population of China is larger than that of Japan.I hope that there’s enough glasses for each gust to have one. (NMET 95)A table made of stone is stronger than the one made of wood.Meeting my uncle after all these years was an unforgettable moment, one I will always treasure.(NMET 2002)②it可指代前面提到的某件事情或将发生的某件事情。
如：How did I get to know him? Well, it was like this.我是怎么理解他的呢? 嗯，事情是这样的。
（it指上句中提到的某件事）We shall appreciate it if you would send us your samples soon.如贵方速寄样品来，我方将不胜感激。
（it指if从句中提到的将来的某件事）(2)、作非人称代词，表示天气、时间、距离、价值等，译成中文时一般可省略。
如：It’s getting darker. Let’s hurry.It is three miles to the railway station.---What the cost? ---It’s twenty dollars.---He was nearly drowned once. ---When was that?---It was in 1998 when he was in the middle school. (2002北京春高考)It’s six o’clock already. The bank is closed.已经六点钟了，银行下班了。
Oh, it’s very cold this winter.哦，今年冬天非常冷。
It’s twenty li from this hotel to the airport.从这家旅馆到机场有20里。
(3)、作指示代词，相当于this, that，表示心目中的人或事物。
如：---Who is making such a noise? ---It must be the children.---Whose bag is that? ---It’s my brother’s.---Who is it? ---It’s me.谁（敲门）呵？是我。
---What you mean is that practice makes perfect. 你的意思是说熟能生巧。
---That’s exactly it. 就是这个意思。
---Do you want this one? ---Yes, that’s it.你要这个吗？对，正是这个。
【注】此时it也用于指代前面整个句子所表示的意思，要特别注意与关系代词which引导的非限制性定语从句用法的区别：it仅作所在句子的主语或宾语，不能起连接作用；而which具有双重作用，作从句的主语或宾语且具有连接前后两部分的功能，所以其前不能用连词and或but来连接，但which可转换成为and/ butit。
二者都能够用来代替前面整个句子所表示的意思。
如：The weather turned out to be very good, which was more than we could expect. (NMET 94)Tom’s mother kept telling him that he should work harder, but it didn’t help. (NMET 93)2、作引导词：(1)、作形式主语。
真正的主语能够是动词不定式、动名词或从句。
如：In fact, it is a hard job for the police to keep order in the important football match.(上海2001) Does it matter if he can’t finish the job on time? (NMET 95)It is a fact that English is being accepted as an international language. (NMET 95)It is difficult for me to learn English.对于我来说学习英语是困难的。