it的所有用法总结全部

it的用法总结：可用作人称代词、指示代词、先行词及引导词等

1、It's a present for one of my children 这是送给我的一个孩子的礼物。

2、It's the software of choice for business use 这是商务专用软件。

3、There have been some problems but basically it's a good system 虽然出现过一些问题，但这基本上仍不失为一个好系统。

4、It's good to meet people from different parts of the country 结识来自这个国家不同地区的人是有益的。

5、It was a chance meeting that would change my life 那次偶然的会面改变了我的一生。

6、It is important not to let things get out of perspective 重要的是不要把事情轻重倒置。

7、It's very difficult to find work at the moment 目前很难找到工作。

8、It was the best day of my life 这是我一生中最美好的一天。

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 Lucy's hat．噢，那是露茜的帽子。

—It looks like a cat！它看上去像只猫！

Where's tea grown？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，you mustn't play on the road．It's dangerous．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。

—Is it your brother？是你哥哥吧？

—No！不是。

—I know—it's you！我知道了，（那）是你。

3．指代性别不详的婴幼儿或在不计较性别时，也可用it来指人。如

The child smiled when it saw its mother．这小孩一见到母亲就笑了。

I don't know who it is．我不知道他是谁。

注意：看到这样的句子（或听到这样的话）时，要想一想，不要一看到it就把它译成“它”。）

4．在回答用指示代词表示人的特殊问句时，常用it指人。如：

—Who's that？那人是谁？

—Is it Kate？是凯特吗？

—Yes，I think you're right．It's Kate．是的，我想你说对了，是凯特。

三、用于指时间、距离和自然现象等。

1．表示时间。如：

—What time is it？几点钟？

—It's ten．十点钟。

It's summer in Australia now．现在澳大利亚是夏天。

特别注意it用于表示时间时还常见于以下两个句型中：

（1）It's time（for sb．）to do sth．／It's time for sth．译为“是（某人）该干……的时间了”、“到……的时候了”。如：

It's time for supper／to have supper．是吃晚饭的时候了。

I think it's time for us to start the lesson now．我想现在是我们开始上课的时候了。

（2）It is ／has been ＋时间段＋since ＋一般过去时。译为“自从……以来已过了……（时间）”。此结构可以与另一种句型进行同义句转换。如：

It has been two weeks since we met last．＝ Two weeks has passed since we met last．自从我们上次相遇以来，两个星期过去了。

It's three years since he came here．＝It has been three years since he came here．＝He has been here for three years．他到这里已经三年了。

2．表示距离。如：

It's half an hour's walk from my home to the school．从我家到学校步行得花半小时时间。

—Where's the farm，Li Lei？Is it far？李雷，农场在哪里？远吗？

—No，it's quite near．不，（距）离这很近。

3．表示自然现象。如：

Sometimes it snows and the land is all white．有时下雪，大地一片白。

It is very quiet here at the moment．眼下这儿很安静。

四、用作形式主语。

英语中常常见到某个句子以it开头，it与其后面的动词不定式短语、动名词短语、名词性从

句等相呼应，以表达一个完整的意义。这是一种习惯表达法，这样的句式可避免句子显得头重脚轻。

1．It＋is／was＋形容词＋（for／of sb．）＋动词不定式短语。对于这个句型中究竟用 for还是用of，一般遵循这样的规则：如果形容词仅仅是描述事物的形容词，如：difficult， easy，hard，important，dangerous等用for；如果形容词是描述不定式行为者的性格、品质的，如：kind，good，nice，clever等则用of。如：

It is interesting to play with snow in winter．冬季里玩雪是很有趣的。

It's important for us to keep the water clean．保持水质清洁对我们来说是很重要的。

It's very kind of you to say so．你这样说真是太好了。

注意：这一句式中的形容词位置也可换用名词；连系动词be也可换用其它连系动词，如feel等。如：

It's a good habit to get up early and go to bed early．早睡早起是好习惯。

It must be great fun to fly to the moon in a spaceship．乘宇宙飞船飞往月球一定很有趣。

It feels strange to have a twin sister．有个孪生姐妹感觉很奇怪。

2．It ＋will be／is ／was ＋形容词＋动名词短语。如：

It's bad playing in the street．在街上玩是没好处的。

Is it any good trying again？再试一次有用吗？

3．It＋is／was＋形容词＋从句。如：

It is certain that he will come．他一定会来。

It's true that he may fall behind the other students．他真的可能落后于其他同学。

It is strange that he should say so．他居然这么说，真是奇怪。

4．It ＋is ／was ＋one's turn（duty，pleasure） ＋to do sth．意为“该轮到某人做某事（做某事是某人的责任、愉悦的事）”。如：

It's your turn to be on duty tomorrow．明天轮到你值日了。

5．It takes（sb．）some time to do sth．意为“（某人）花……时间做某事”。如

It took me a week to finish reading the book．我花了一周时间看完这本书。

6．It ＋cost／costs ＋sb．＋some money ＋to do sth．译为“某人花多少钱做某事”。如：

It cost me 260 yuan to buy the new watch．我买这块新手表花了260元。

7．It seems ／seemed ＋从句。译为“看起来好像……”，此结构可以转换成“seem ＋动词不定式”形式。如：

It seems that he is ill．＝He seems to be ill．看起来他好像病了。

五、用作形式宾语。

当句子的真正宾语是动词不定式、动名词或从句时，为避免句子头重脚轻，须将其放在宾语补足语之后，改用先行词it占据其原来的位置。it用作形式宾语的句型为：主语＋谓语＋it＋宾语补足语＋动词不定式／动名词／从句。该句型中宾语补足语可由形容词、名词等充当。如：

He found it not easy to learn a foreign language well．他发现学好一门外语是不容易的。

We think it no good reading in bed．我们认为躺在床上看书无益处。

I think it necessary that we have the meeting．我认为开这个会是必要的。

it的所有用法总结如下：

I．It 作形式主语的句型

①It + be + adj(kind , wise , careless, clever…) + of sb to do sth

Eg: It is wise of him to make such a decision他做出这样的决定是明智的。

②It + be + adj(easy , safe , common , normal …)+ for sb to do sth

该句型中adj若为important, necessary, natural, possible, strange, vital, essential等可改为从句,从句用should+动词原形。

Eg: It’s very dangerous for children to play with fire

It is important for us to learn English well (= It is important that we (should) learn English well)

③ It + be +V-ed(reported,believed, said, suggested…)+ that 从句

该句型中：⑴若V-ed为reported, believed, said等常译为“据报道”，“据认为”，“据说”。⑵若V-ed为suggested, ordered, demanded, insisted等表示“建议”,“命令”的词，从句要用虚拟语气(should)+动词原形。

Eg: It is suggested that the book (should) be revised

It’s said that Tom has been back from abroad (=Tom is said to have been back from abroad)

④ It + be + n (a pity, a shame, a fact , good news…)+ that 从句:

该句型中，从句一般用(should) + 动词原形，表示出乎意料，常译为＂竟然＂。

Eg: It is a pity that such a thing ( should ) happen in your class 这种事竟然发生在你们班上，真是遗憾！

⑤ It is useless/no use/no good /pleasure+ doing sth

此句型中的it是形式主语, 其后的动名词短语是真正的主语,译为“做…没有用”。

Eg : It ‘s useless arguing with him further // It’s no use talking with him, because he won’t listen

⑥ It takes sb to do sth

该句型中it是形式主语，真正的宾语是to do sth，常译为＂做……要花费某人……＂。

Eg: It took thousands of people many years to build the Great Wall

II．It 作形式宾语的句型

1sb find/ believe/ think/ feel/ consider/ make + it +n/adj +to do或从句

该句型中的it 作形式宾语。为了记忆方便我们可称该句型为“6123结构”。6 指主句中常用的动词：think, believe, make, find, consider, feel；1 指的是形式宾语 it；2 指的是宾补的两种形式：形容词或名词；3 指的是真正宾语的三种形式：不定式短语，动名词短语或that引导的宾语从句。

Eg: We think it our duty to clean our classroom every day

He felt it important learning English well

They found it difficult that they would finish their work in two days

2主语＋hate / dislike / love / like ＋it ＋when－从句

Eg: I hate it when people speak with their mouths full

3 主语＋appreciate ＋it ＋if－从句

Eg: I really appreciate it if you could help me with my math

4 sb depend on/count on/rely on/see to(负责，确保)/ answer for it that…

Eg: You may rely on it that he won’t be late

You must see to it that the doors are locked before you leave the lab

5 sb take it for granted that… 认为……是理所当然的

Eg: I take it for granted that he will succeed

IIIIt 引导的时间句型

⑴ It + is/has been+ 时间段+ since引导的时间状语从句:

该句型中从句一般用过去时态，句意为“自从以来已多久了”

Eg : It is 5 minutes since the bus left 公汽开走已有5分钟了

⑵ It + be（will/was）+ 时间段 + before引导的时间状语从句:

该句型中，主句谓语动词be若为肯定式，意为“过多久才”；若为否定式时，意为“没过多久就”。

Eg : It will be long/ 3 hours before he comes back要过三个小时他才会回来

It was 3 hours before he came back 过了三个小时他才回来

⑶ It + be + 时间点+ when引导的时间状语从句

这个句型中, it 代指时间，表示时间点的词前没有介词。

Eg : It will be Monday when he comes back 他周一的时候回来

It was Monday when he came back 他周一回来的

对比：It was on Monday that he came back (强调句)

⑷ It + is (about/high) time + (that) sb did/should dosth

意为“该是某人做…的时候了”， about/high是用于加强语气，that从句用should或动词一般过去时表虚拟。

亦可转换成 It + is+ time +(for sb )to do sth

Eg : It’s (high/about) time (that) we handed in/should hand in our homework

⑸ It / This / That +is+ the first(second …) time + that sb has done sth:

意为“这是某人第…次做…”，注意time前有序数词，主句是 is 时 ，从句要用现在完成时；如果主句用was ，则从句须用过去完成时。 Eg : It is the third time that I have seen the film

That was the second time that I have been there

IV．It 引导的强调句

强调句形式：It + is/was +被强调的部分+ that/who从句

Eg: It was last week that I met an old friend in the street // It was because he was ill that he didn't come to school yesterday

(强调原因状语从句时，只能强调由because所引导的从句)

判断方法：将It is/was和that去掉，若该句是一个完整无缺的句子即为强调句

常考考点：

①强调句型中的主谓一致Eg: It is you，rather than he，that are to blame for the accident．

②插入从句的强调句型 Eg: It was in the restaurant where we had dinner last Sunday that you left your wallet．

③强调句型的一般疑问句、特殊疑问句形式

一般疑问句：Is / Was it + 被强调部分+ that + 句子其余部分 Eg: Was it in 1933 that the Second World War broke out

特殊疑问句：疑问词+ be + it + that + 句子其余部分Eg: When was it that he changed his mind to take part in the activity？

④强调句型用于名词性从句, 尤其注意要使用陈述语序。

Eg: I don’t know when it was that he changed his mind to take part in the activity？

⑤not until用于强调句型 It is / was not until ＋被强调部分＋ that ＋其他部分

Eg : It was not until midnight that she went back home

此句型只用until，不用till。但如果不是强调句型，till和until可通用。因为句型中It is / was not已经是否定句了，that后面的从句要用肯定句。

V．It其他常见用法：

It looks / appears as if 看起来好像……It looks as if she is ill

It seems that 似乎…… It seems that he will be back in a few days

It turns out that 原来是…… It turned out that the beautiful woman was a thief

It occurs to/strikes sb that… 突然想到……It occurred to me that I hadn’t locked the door

It happened that 碰巧…… It happened that he met his teacher in the street

It doesn’t matter whether/if…无论是…没关系 It doesn’t matter whether he will come or not

It is no wonder that 难怪… He works so hard It’s no wonder he could pass the exam

How did it come about that … “……怎么发生的？” How did it come about that his bike was thrown into the river

It all depends/that all depends那得看情况

It's up to sb由……决定，由……负责，取决于……

as it is (1)事实上，实际情况是……; (2)照原样

make it成功、做到、说定

Believe it or not信不信由你

Get it 明白了

：

1It is+被强调部分+that

该句型是强调句型，将被强调的放在前面，其他部分置于之后，强调的主语如果是人，可以用来替换，如果把这种句型结构划掉后，应该是一个完整无缺的句子，这也是判断强调句型与其他从句的方法。

It was they that (who) cleaned the classroom yesterday It was in the street that I met her father

It was with great joy ___he received the news that his lost daughter had been found (2004 福建)

A because B which C since D that (D)

2 It is not until +被强调的部分+ that

该句型译成汉语“直到……才”，可以说是的强调形式。It was not until she took off her dark glasses that I realized she was a film star =Not until she took off her dark glasses did I realize she was a film star =I didn’t realize she was a famous film star until she took off her dark glasses

It was ___back home after the experiment (2004 湖北)

A not until midnight did he go

B until midnight that he didn’t go

C not until midnight that he went

D until midnight when he didn’t go (C)

3 It is clear (obvious, true, possible, certain) that…

该句型中it是形式主语，真正的主语是that引导的主语从句，常译为“清楚（显然、真的、肯定）”是主语从句最常见的结构。

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

4 It is important (necessary, right, strange, natural…) that…

该句型和上一句同属一个句型。由于主句中的形容词不同，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。

It is important that we (should) learn English well

It is necessary that he (should) remember these words

5 It is said (reported, learned…) that…

该句型中的it 仍是形式主语，真正的主语是that 引导的主语从句。该结构常译为“据说（据报道，据悉……）

It is said that he has come to Beijing

It is reported that another earth satellite has been put into orbit

6 It is suggested (ordered…) that…

该句型和上一句属一个句型。主句中的过去分词是表示请求、建议、命令等词时，that后的从句要用虚拟语气 （should+动词原形）。可以省略，常译为“据建议；有命令……”

It is suggested that the meeting (should) be put off

It was ordered that we (should) arrive there in two hours

7 It is a pity (a shame…) that …

在该句型中，that后的从句一般用虚拟语气（should+动词原形），should可以省去，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。

It is a pity that such a thing (should) happen in your class

这种事竟然发生在你们班上，真是遗憾。

It is a pity that he is ill

他生病了，真遗憾！

8 It is time (about time, high time) that…

该句型中that后的从句应该用虚拟语气，值得注意的是：常用过去时态表示虚拟，有时也用should+动词原形，should 不能省。常译为“是（正是）……的时候……”

It is time that children should go to bed

=It is time that children went to bed

9 It is the first (second, …)time that…

该句型应和上一个句型区别开来。该句型中不用虚拟语气，而用完成时态。至于用哪种完成时态，由主句的谓语动词的时态来决定。如果是一般现在时，从句用现在完成时态；如果是一般过去时，从句则用过去完成时态。该结构中that可以省去；it有时用this替换，常译为“是第一（二,…）次…”。

10 It is …since…

该句型主要用作处理瞬间动词的完成时，要和表示一段时间的时间状语连用。主句中是时间作表语，其时态是现在时和完成时，引导的从句通常是一般过去时态，而且是瞬间动词。如果主句是一般过去时，从句则用过去完成时。

It is (has been) 5 years since his father died

It is almost five years ___we saw each other last time (2005 北京)

A before B since C after D when(B)

11 It is …when…

该句型中的when引导的是一个时间状语从句，主句中的it指时间，表语由具体的时间充当。常译为“当……的时候，是……”

It was 5 o’clock when he came here

12 It be…before…

该句型主句中的it指时间，主句中的时态常是一般将来时或过去时两种时态，主句中的表语多是long ,not long ,3 days, 2 weeks等表示时间段的词和短语。常译为“…之后才”，“没过……就……”

It was 3 days before he went to Beijing

It will not be long before he finishes his job

13 It happens (seems, looks, appears) that…

该句型中的it 是形式主语，that 引导的是主语从句，主句中的happen, seem等词是不及物动词。

It happened (so happened) that he met his teacher in the street (碰巧……)

It seems that he will be back in a few days (看来……)

The Foreign Minister said, “___our hope that the two sides will work towards peace” (2004北京)

A This is B There is C That is D It is (D)

14 It takes sb…to do sth

该句型中的不定式是真正的主语，是形式主语，句型中的直接宾语是时间。常译为“做……要花费某人……”

It took thousands of people many years to build the Great Wall

15．It is no good (use) doing sth

该句型中的真正主语是动名词短语，主句中的表语可以是 no good (not any good), no use (not any use )

It is no good learning English without speaking English

16 It doesn’t matter whether…

该句型中的引导的从句是真正的主语，该句型译为“不论（是否）……没关系……

It doesn’t matter whether they are old

17．It is kind (of sb) to do sth

该句型中的不定式短语是真正主语，如果不定式的逻辑主语是由of引出，主句中的形容词必须是能表示逻辑主语的形容词。常见的有：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等。这个句型可以改写为sbis kind to do sth

It is kind of you to stay so =You are kind to say so

18 It is necessary (for sb) to do sth

该句型与上一句统属一个句型。如果不定式的逻辑主语是由for 引出的，主句的形容词通常是表示重要性，紧迫性，频繁程度，难易，安全等情况的形容词。常见的形容词有：

Important,necessary,natural,easy,safe,common,,normal,hard,difficult,dangerous,unusual,grape, impossible, pleasant等。

It is important for her to come to the party =It is important that she (should) come to the party

19 It looks (seems) as if …

该句型中it 无意义。As if 引导一个状语从句，常译为：“看起来好像……”如果与事实不相符合，则用虚拟语气。

It looks as if he is ill （真的病了）

It looks as if he was ill （事实上没有生病）

It seemed as if he was dying

20 We think it important to learn a foreign language

该句型中的it作形式宾语。为了记忆方便我们可称该句型为“7123结构”

7指主句中的常用的动词：think, believe, make, find, consider, feel, take

1指的是形式宾语it

2指的是宾补的两种形式：形容词和名词

3指的是真正宾语的三种形式：不定式短语，动名词短语或that引导的宾语从句。

We think it our duty to clean our classroom every day

XiaoLi felt it important learning English well

They found it difficult that they would finish their work in two days

-Do you like ____here

-Oh, yes The air, the weather, the way of life Everything is so nice (2004 全国卷二)

A this B these C that D it (D)

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