It 用法大全

It 用法大全

一、指无生命、动物、植物和在性别不计或不详时指人和婴儿。There is a person knocking at the door. Who can it be?

二、指心目中的人或上文中提到的人或事物，这那它 He is fifty-two, but doesn't look it.

Jim is ill. Have you heard of it?

三、可以代替指示代词this和that

What's this/that？ ------It's a book。

四、作无人称代词的主语，表时间、天气、距离、温度、环境和情况。It was noisy when I got to the room.

五--表含糊概念，无补语，指从句叙述内容。

I hate it that I've made so many mistakes.

I hate it when you can't discuss things openly.

You may depend on it they are valuable.

How's it going with you? 近况如何？

Does it itch much? 很痒痒吗？

Where does it hurt? 哪儿疼？

Now you are in for it. 现在你可以到家了。

It says in the Bible, "Thou shalt not steal." 《圣经》上说："勿偷窃。" Hang it all, we can't wait all day for him.见鬼，我们不能整天等他呀！ There is nothing else for it but to stand. 别无他法，只好忍受。Whose turn is it next? 接下来轮到谁了You never had it so good. 日子从来没有这样好。Take it easy. 放松点！不要紧张！

How is it in the market? 超市情况如何？

六----强调句中使用"It is/was+强调部分（主语，宾语等）+that/who+其余部分"。如果强调的是特殊疑问句，表示"究竟，到底"等语气时，就用结构："疑问词+is/was it that +句子"，如：Where was it that you met him? What is it that he wants to see? When was it that you saw him?

Why is it that you want to change your idea?

这类强调句也可用作表语或宾语。The question is which book it is that you want to buy.

He found out who it was that saved the drowning boy.

如果强调谓语，谓语动词部分的语气用do，does，did，常译作"的确，千万，真的"

Do be patient! 千万要耐心！He does speak English well。He said he would come and did come.

七、作形式宾语

a) 谓语动词appreciate, dislike, like, hate, love, make (按时到达，成功)等后接由if或when 等引导的宾语从句时，往往在前面加上形式宾语

it。 I would appreciate it if you could come to my birthday party.

2、动词have（表明，坚持说）、take（认为，猜想）、hide（隐藏）、publish （公布）、put（表达，写出来）等后接由that引导的宾语从句时，往往在从句的前面加上形式宾语。I take it that you will be leaving Shanghai soon.我认为你不久就离开上海。

We published it that we had finished the project ahead of time. 我宣布我们已经提前完成了这项工程。

3、动词短语allow for（担保）、count on（期待）、depend on（依靠）、insist on（坚持）、see to（确保）等后接that引导的宾语从句时，必须冠以形式宾语it。如：I am counting on it that you will come. 我们期待着你的到来。

She'll see to it that he goes ahead。她确保让他先走。

八、作形式主语-it作形式主语，真正的主语可以是to do，doing 和clause 等

It 做形式主语，真正的主语是动名词，这类结构是it be + adjective/noun + doing, 这类词有nice, good, useless, hard, foolish, enjoyable, worthwhile, 和名词use, good, fun, job, a waste of 等。如：It is no use trying to argue with Shylock.

It 作形式主语时，常用于下列四种结构，且由固定译法

a) it + be + noun + that-clause

it is a fact that…事实上是……

it is common knowledge that众所周知的是……

it is a question that………是个问题

it is a pity that…可惜的是……

it is a wonder that………真是个奇迹

it is a shame that…可耻的是……

it is an honor that…非常荣幸……

it is a common saying that…俗话说……

it is no good that………是没用的

it is no use that…做……是无用的

it is one's turn to do 轮到……做……

it is one's duty to do 做……是……的职责

it is one's fault to do 做……是……的过错

it is worth that 可以看出…；可以说……；

it is no wonder that…难怪……

it is no good that..做……是没用的

it is no harm that做…是无害的，无妨是…

I think it would be a good idea to do 我认为做……是个好主意

it is a great joy/pleasure to do 高兴做……

it is a shame to do 做……不光彩

it is good manners to do 做……是有礼貌的

it is a waste of time to do…做……是浪费时间

b) it + be + adjective + that-clause

it is certain that…很肯定的是……

it is clear/evident that…很清楚……

it is unlikely that…未必会，不见得，不太可能

it is likely that…很可能……

it is better that…最好……

it is natural that…很自然……