it用法及练习附答案

高三一轮复习It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’s + 时间段+ before-从句. 过多长的时间才……

It’s not until........that.......直到......才.....

三、it用作形式主语

1. 基本用法：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。如：

It’s very important to remember this.

It’s hard work climbing mountains.

It’s unknown when he will come.

2. 用作形式主语的的重要句型

(1) It + be + adj. for (of) sb to do sth 某人做某事……

It is hard for him to make up his mind. （介词for表示对象，意为“对……来说”）

It was foolish of her to say such a thing. （of 用于指某人的性格、属性、特征等）

(2) It takes sb + 时间段+ to do sth. 某人做某事花了……时间

(3) It is up to sb to do sth. 该由某人做某事

(4) it look (seem, appear, happen, occur) that [as if]…似乎……

(5) If it were not for…/ If it hadn’t been for…若不是因为……

四、it用作形式宾语

当不定式、动名词、从句等复杂成分用作宾语且其后跟有宾语补足语时，通常会在宾语补足语前使用形式宾语，而将真正的宾语移至句末。其基本结构为“动词+it+宾语补足语+不定式(动名词或从句)”。如：

I find it difficult to do the job well.

I think it best that you should stay here.

We think it no use complaining.

五、用于强调句型

即“It is/was＋被强调部分＋that/who/whom+其它”句型之中。

It was yesterday that I met your father in the street．

It was in the street that I met your father yesterday.

It的相关练习

姓名：_________ 得分：__________

一、选择题20’

( )1. It was at the gate ____ he told me the news.

A. that

B. what

C. which

D. when

( )2. Is ____necessary to complete the design before National Day?

A. this

B. that

C. it

D. He

( )3.I don't think ____possible to master a foreign language without much memory work.

A. this

B. that

C. its

D. it

( )4.Does ____matter if he can't finish the job on time?

A. this

B. that

C. he

D. it

( )5.It was not ____she took off her dark glasses ____ I realized she was a famous film star.

A. when; that

B. until; that

C. until; when

D. when; then

二、填空20’

1.____________________（据报道）a lot of people lost their jobs in the city last month.

2._________________________（碰巧）I had been away when he called.

3._____________________（看来）nobody knows what has happened.(seem)

4.____________________________（感到遗憾）I haven’t been to the get-together.

5.It’s no use_____________________________（为打翻的牛奶而哭泣).

三、改写下面的强调句40’

My father did the experiment in the lab yesterday evening.

主宾地点时间

1.________________________________________________________________（强调主语）

2._________________________________________________________________（强调宾语）

3._______________________________________________________________（强调时间状语）

4.______________________________________________________________（强调地点状语）

I met your father in the street yesterday .

5._______________________________________________________________(强调宾语)

6.________________________________________________________________（强调地点状语）

7.He didn’t realize his fault until we pointed out it to him. （改为下面句型结构）

—It was not until __________________________________that ______________________.