It 用 法

It 用 法 2007，5，16整理

一、it的基本用法

1．用作人称代词，代替前文提到过的事物或一件事情。 The train has arrived. It arrived half an hour ago. You have saved my life. I will never forget it.

2．用以代替提示代词this, that。 —What’s this? —It’s a knife.

—Whose watch is that? —It’s mine.

3．起指示代词的作用，指未知的人或物。 —Who is knocking at the door? —It’s me. Who is that?” “It’s my friend.”

4．指动物，婴儿，

Look at the poor little baby. It is crying again.

5．指环境或情况等。

It was very noisy (quiet) at the very moment. If it is convenient I can come tomorrow.

6．指天气，时间，距离或计算结果 It often rains in summer here. It’s eight o’clock.

It is a long way to the school.

7．作形式主语或形式宾语，代替不定式短语，动名词短语或从句 It is important to master aforeign languge. It is not easy to finish the work in two days. It is no use crying over spilt milk.

It is as pity that you didn’t read the book.

I consider it my duty to help you.

They took it for granted that I would to to their party. I think it no use arguing with him.

I found it very interesting to study English.

He made it clear that he was not interested in that subject.

8．用于强调句 所强调的可以是单词，短语， 也可以是从句，但结构必须完整。 强调的成分可以是主语，宾语和状语，但不能是定语或谓语。 （1） 句型 it is/was+被强调成分+that+其他成分（原句剩余部分） It was I that(who) met Tom at the railway station yesterday. It was Tom that(=whom) I met at the railway station yesterday. It was at the railway station that I met Tom yesterday. It was yesterday that I met Tom at the railway station.

It is two hours that he spends on English every day.

注：原句谓语动词时态是一般过去时，过去完成时或过去进行时，用It was---, 其他时态用It is---.

（2）强调句的一般疑问句只需把is/was提前。

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Was it during the Anti-Japanese War that he died?

(3)强调句的特殊疑问句，只需在一般疑问句前加上疑问词

When was it that he died?

(4) 可用It might be ---that---, I t must have been--- that---句型表示强调 It might be his father that you’re thinking of.

(5) not---until---句型的强调句

（6）强调句与it 做形式主语的区别 It is clear that not all boys like football.

(7)强调句与it is/was +时间+whern从句；it is+时间+since从句; it was not long--before--的区别

It was midnight when I got here yesterday.

It is/has been two years since I began to learn English.

（8）it后接tha从句或as if从句 It+seem/ appear/ happen/ occur/ follow It seems that he will pass the exam. It looks as if it is going to rain.

二．含有“It is …”的句型 1．It is time (for sb.) to do sth.

It is (high) time that sb. did sth.(虚拟语气)

2．It is + 形容词（+of / for sb.）+ to do sth.

通常用 of的词有brave、clever、careful、hopeless、kind、good、naughty、nice、silly、

stupid、foolish、wise等。

3．It is + 形容词 + that + sb. + (should) do sth.（虚拟语气）

能用于这个句型的形容词有strange、wonderful、natural、good、proper、right、wrong、

well、fortunate、important、necessary、useless、likely、probable、impossible等。有时可省去should而直接用动词原形。如： It is important that we should pay close attention to grain. It is natural that he（should）say so.

4．It is no use/ good + doing sth.

It is no use trying again = It is of no use to try again.

5．It is + 被强调部分 + that/who + … Was it in the street that you met her? Who was it that called him“comrade”?

It was not until yesterday that I met my old friend. It is in a small factory that my brother is going to work.（注意上述各句均为强调句型的“考

点”）

比较：It is a small factory where my brother is going to work.（定语从句）

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6．It is said/reported/announced/ (well) known … that…

7．It is/was + 时间 + since … 从??已多久了。 It is three years since I met him in Beijing.

It was a long time since I (had) lived in that small mountain village with these farmers.（注意

两句中的时态）

It is five months since I arrived in New York.我到纽约已经五个月了。 It is five months since I was in New York.我离开纽约已经五个月了。

（注意：终止性动词表示从动作发生时算起；如果是状态动词或持续性动词，则从动

作或状态结束时算起。）

8．It is + 时间 + before …

这个句型和上面句型中时间都是时间段，如long、years、months、weeks、five days、

three hours、twenty minutes等。不过主句的时态多用一般将来时或一般过去时。 It will be several years before we meet again. 我们要过好几年才能再见面。

It was not long before they set out for the front. 不久他们就出发去了前线。

9．It is /was/will be the first/second/third … time that … It is the first time that I have been here.

10．It is up to sb. to do sth … 应由某人做某事。 It is up to you to decide whether we start or not.

三、精典名题导解

1. _________ is a fact that English is being accepted as an international language.(NMET

1995)

A.There B.This C.That D.It

2. I hope there are enough glasse for each guest to have ________.(NMET 1995) A.it B.those C.them D.one 3. Was __________ that I saw last night at the concert?

A.it you B.not you C.you D.that yourself

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it用法专题练习1：

1---What’s this? ---_______ a map of China A.This is B.That’s C.It’s D.There’s 2---Where is my pen? ---_____on the desk.

A.This is B.That’s C.It’s D.There’s

3I was disappointed with the film. I had expected_____to be much better. A.it B.this C.them D.one 4They often help us with our research. ______kind of them. A.They are B.You are C.It is D.This is

5Tom’s mother kept telling him to work harder, but______didn’t help. A.he B.she C.this D.it

6John passed the exam successfully and _____was more than we had expected. A.he B.it C.this D.there 7---Who’s knocking at the door? ---_____ me. A.It’s B.I’m C.That’s D.This is 8---Who’s the baby in the photo? ---_____ my brother. A. This is B.That’s C.It’s D.There’s 9_____ Sunday today. Let’s go for an outing.

A.There is B.It’s C.This is D.That’s 10_____ was raining heavily when the film was over. A.Weather B.Sky C.It D.There 11______a long way from my home to the school.

A.It is B.This is C.There is D.There has been 12---What’s ten added to six? ---______ sixteen. A.There is B.It is C.This is D.We have 13_____ important to learn English well.

A.This is B.That’s C.It’s D.There’s 14_______ great fun to play basketball after school.

A.It has B.It is C.This is D.There has 15______ no use asking them for help.

A.It has B.It is C.This is D.There has 16_______a waste of money smoking a lot.

A.It has B.It is C.This is D.There has 17_____strange that he should say such words to you.

A.It has B.It is C.This is D.There has

18_____ said that only three people could understand Einstein at that time. A.It has B.It is C.This is D.There has

19Einstein found _____ hard to get along with the other boys at school. A.its B.it’s C.it D./

20They feel _____ a pity that they should miss the wonderful film. A.its B.this C.it D./

21The dusty air makes _____ difficult to get a clear picture. A.its B.it’s C.it D./

22I find _____no need going to town without any money on me. A.its B.this C.it D./ 23He thinks _____a duty to work for the people.

A.its B.this is C.it D./

24We feel _____a pity _____ we (should) miss the chance of going to the party. A.its,that B.this,that C.it,that D.that,that

25____ was not until he got to the office _____ he remembered leaving the key home. A.It,it B.It,that C.It,when D.That,when 26________ am ready to help you out of the danger.

A.It is I who B.it is me who C.It is me that D.This is me that 27_____English_____I will try to learn well.

A.It is,that B.This is,that C.That,which D.There is,which 28---I’m afraid I can’t do the job as you told me to. ---_______matter.

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