it用法

It用法小结

一．作形式主语，替代主语从句，动词不定式，或动名词短语：

1.作形式主语替代主语从句

⑴It is clear ( obvious，true，possible，certain....) that 从句常译为＂┅清楚的等”

It is very clear that he’s round and tall like a tree.

⑵It is important ( necessary，right，strange，natural...) that 从句.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 necessary that he (should) remember these words.

⑶It is said (reported/ learned/believed/thought/known/told/hoped.....) that 从句常译为＂据说（据报道，

据悉．．．）＂。

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

⑷It is suggested ( advised/ ordered / demanded/ insisted/ commanded... ) that 从句.that后的从句要用虚

拟语气（should + 动词原形），should 可以省；常译为＂据建议；有命令．．．）

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

⑸It is time ( about time ，high time ) that从句(虚拟语气:动词用过去时did 或should+v)

It is (high ) time you made /should make up your mind.

⑹It is the first ( second ... ) time that从句(从句用现在完成时have done )

It was the first ( second ... ) time that从句(从句用过去完成时had done )

常译为＂是第一（二）．．．次．．．＂。

It is the first time I have been here. = This is the first time I have been here

⑺It is a pity ( a shame /an honour/a good thing/a fact,/a surprise/... ) that从句.

that后的从句一般用虚拟语气（should + 动词原形），should可省去．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。

①It 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！

②It is a pity that he is ill. 他生病了，真遗憾！

⑻It happens (seems，looks，appears ) that从句.常译为“ 碰巧…,似乎是…,看起来…”

①It happened ( so happened ) that he met his teacher in the street. 碰巧．．.

2.作形式主语替代不定式

⑴It is kind ( of sb. ) to do sth. 不定式的逻辑主语是由of引起，主句中的形容词必须是能表示逻辑主语特征的褒义或贬义形容词。常见的词有careless，clever ，foolish kind ，lazy ，nice，polite，rude ，stupid ，wise等。

如:It is kind of you to say so. = You are kind to say so.

⑵It is necessary ( for sb. ) to do sth. .不定式的逻辑主语是由for引起，主句中的形容词通常是表示重要性，频繁程度，难易，安全等情况的中性形容词。常见的形容词有：

important，necessary，natural easy ，hard ，difficult ，dangerous ，impossible等

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

⑶It takes sb. ... to do sth. 常译为＂做．．．要花费某人．．．＂。

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

3.作形式主语替代动名词短语It is no good / no use / useless doing sth. 常译为“┅有好处或没有用”

①It is no use crying over spilt milk..

二．作形式宾语，代替不定式，动名词短语或宾语从句。

We think it important to learn a foreign language 该句型中的it 作形式宾语，该结构中常用动词有：think, believe, make ,find consider, feel；

The Internet makes it easier for companies to keep in touch with customers.

三、.it的重要固定句型

1.强调句型: It is/was + 被强调部分+ that 从句(被强调的主语如果是人，可用who)”

2.特殊疑问句结构：特殊疑问词+is/was+that/who+其他？

It was yesterday that I met her in the street. When was it that I met her in the street?

1. It’s possible/probable/likely that…可能…

2.It turns out that…原来……;结果……

3.It occurred to me that…/ It hit me that…/It struck me that…我突然想到……

4.It’s no wonder that…难怪……

5.It makes no difference that…是毫无二致的

6.owe it to sb.that…把……归功于

7. leave it to sb.that…把……留给某人做

8. take it for granted that... 想当然9. keep it in mind that…记住

10..make it clear that…使……清楚11.depend /rely on it that…相信。。。

12.see to it that...保证，负责。。。13.hate /dislike/love/like it that 喜欢、不喜欢。。。

14.It is/was /will be+时间+before从句

1.We should learn to to leave things where you can find them again.(make)

我们应该学会养成习惯，把东西放在下次能找到的地方。

2.So to have a picnic in the open air that they were unwilling to leave.(feel)

他们觉得在户外野炊是如此有趣以至于不想离开。

3.Not once him that he could one day became a top student in class.(occur)

他从来都没想过能成为班上的一名尖子生。

4.The development of technology for people to get in touch with each other.(easy)

技术的发展已经使得人们与彼此取得联系更容易。

5.The better prepared you are for the performance, for you to suffer from a stage fright.(possible) 你为表演准备得越充分，怯场的可能性就会越小。

6.There is a consensus among us that strong will and perseverance are .(succeed)

我们都一致认为坚强的意志和毅力是取得成功所需要的。

7.It is the first time that the actor and the singer on the cover of the magazine Times’.(appear)

这是那个兼演员与歌手于一身的人第一次出现在《时代》杂志封面上。

8.My classmates kept asking me that I worked out the math problem.(how)

我的同学们一直在问我到底是怎么做出那道数学题的。

9.After years of hard work,you may he can fulfill the task.(depend)

经过多年的努力工作后，你可以相信他能够完成这个任务。

10.It is required that all high school students to use cell phones at school.(allow)

所有高中都有规定，学生在校内不准使用手机。

11.We are told from the director’s office that we know the result of the final exam.(long) 我们从主任办公室获悉，过不了多久我们就可以知道期终考试的结果。