It 的用法总结

It 的用法总结

一. 代词: 1)指代上文

2)指代this/that

3)指代未知性别的婴儿或孩子或身份不明的人

4）指代时间/地点/天气/温度/距离/环境

What does “it” refer to?

1.It gets dark very early in the winter.

2.What will you call it if it’s a boy?

3.I love spring---It’s a wonderful time of the year.

4.It’s less than 100 kilometres from here to Jinan.

5.When the factory closes, it will mean 500 people losing their jobs.

6.What’s this? It’s a cat.

7.It has snowed much this year.

注意：it, one和that, those作替代词的区别

(1)The book in your bag is very interesting. Can I borrow ?

(2) The book in your bag is more interesting than ______ on the desk.

(3) The weather here is much colder than____ in Nanjing.

(4) The books are free. You can take____ free of charge.

(5) The books in the bag are better than _____ on the desk.

it 表示特指，与前面指代的名词是同一个

one 表示泛指，指代单数可数名词，与指代的名词同类但不同一个

that表示特指，相当于the+名词单数，与指代的名词同类但不同一个those表示特指,相当于the+复数可数名词, 与指代的名词同类但不同一个

it指时间的几个重要句式

【句式1】it is /has been + 段时间+ since ----自从----多久了•It is / has been 3 years since I visited your company.

【句式2】It was + 段时间+ before ---过了多久-----才--- •It was 3 hours before he realized the truth.

【句式3】It will be +段时间+ before --要过多久----才-- •It will be 3 months before they complete the bridge.

【句式4】it was + 点时间+ when ---某事发生于---某一时刻—It was 10 o’clock when the big fire brok e out .

【句式5】It /this is/was the +序数词+ time + 现在完成时态/过去完成时- （表示某人第几次做某事）

•It is the second time I have heard of this .

【句式6】It is time (about time /high time ) that sb. did /should do （该是干……的时候了）

It is time that we went to school.

对比训练

1. It will be years ____ we meet again.

2. It is ten years ____ I came to this town.

3. It is ten years ago ____ I came to this town.

4. It is the third time ___ I _________ (visit) to this town.

5. It was 2 am. ___Tangshan earthquake took place.

A. when

B. that

C. before

D. since

二. 引导词: 1)形式主语2)形式宾语3)强调句

It 作形式主语

基本结构：It + be/v. +……+ (for sb/ of sb.) to do sth (动词不定式)

doing sth.（动名词短语）

that/ whether …（从句）

注意1：: For or Of ?

1. It is important ____ us to learn English well.

2. It is very kind ____ you to help me learn English.

3. It is foolish ____ you to believe him.

4. It is necessary ____ you to go over this lesson.

注意2;It 何时代替doing?

It +be + no use

no good + doing sth

a waste of time

……

翻译：

1.和他争论没有用。_______________________________

2.打电脑游戏是浪费时间。_____________________________________________

注意3：that后的从句要用虚拟语气（should + 动词原形），should 可以省

(1). It is a pity (a shame /an honor /a good thing/a fact /a surprise/... ) that ...

(2). It is important ( necessary，strange，natural...) that ...

(3).It is insisted(ordered/commanded,suggested/advised/proposed,demanded/requested/required... ) that ...

注意4：He is said/ reported to have gone abroad.

=It is said/reported that he has gone abroad.

All the students are believed to have done their best.

=It is believed that all the students have done their best.

注意5：It + vi.(不及物动词) + that

It happens that he was out. 碰巧…

It seems that he doesn’t know the secret.好像…

It appears that he is honest. 好像…

It occurred to me that I lost my purse on the bus. 我突然想到…

It doesn’t matter whether he will come or not. …没有关系