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thatWhat'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-clauseit 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-clauseit 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……it is necessary that...有必要……it is obvious that … 很明显……it is important that..重要的是……，……是重要的it is impossible that………是不可能的c) it + be + past participle + that-clauseit is said/reported that…据说/报道……it is demanded that…按要求……it is estimated that…据统计……it is believed that… 据认为……；人们认为……it can be said that…可以说……it can be seen that …可见……，可以说……it has been proved that…已经证明……it has been shown that…业已表明……i t must be pointed that…必须指出……it must be admitted that 必须指出/承认，it must be realized that 必须意识到it is acknowledged that... 应该承认……it is announced that…据称……，有人宣称……it is observed that… 值得注意的是……it is arranged that….已经商定……it is pointed out that….有人指出……it is proposed that 有人提议…，一般认为……it is regarded/thought that 人们认为……it is considered that 人们认为…，据估计……it is declared that…据宣称……，有人宣布it is described that… 据说……，it is expected that…人们希望……，预期……it is generally accepted that通常人们认为……it is believed/recognized that 普遍认为……it is hoped that…人们希望……it should be noted that 应该注意/指出。

；it used to be said that ..常言道……it was noted above that 如上所述……it will be said that 有人会说……it will be seen from that 由此可见……it is stated that据称；据说；有人说；一般认为it is suggested that 有人提议；据建议it is supposed that 据推测；假定；人们猜测it is usually considered that 通常认为it is well known that 大家都知道，众所周知it is not settled whether 是否……还未决定d) it + be + intransitive verb + that-clauseit seems that/as if 好像是……it happens/happened that 碰巧……it follows that 由此可见……it matters that 要紧的是……it occurs/occurred to sb that 某人想到……it struck me that 我突然想到……it appears to …that ..在……看来似乎it doesn't matter if/whether 即使……也无妨it goes without saying that ……不言而喻it is not until … that…直到……才……it is up to somebody to do 该……做……it remains to be proved that 尚待证明it remains to be seen that 尚待分晓it remains for sb to do 有待某人做……it so fell out that 结果是，终于it turned out that证明是，结果是it is worth notice that 值得注意的是it looks as if 看起来好像，似乎it makes no difference that…都是一样，无区别it is not just like sb to do 某人不会做……it takes somebody something to do 某人花费……做……九、习惯用法it all depends=that depends 视情况而定if it is convenient to you 如果你方面的话believe it or not 信不信由你take it easy 别着急，慢慢来，别紧张， as it is 但是实际上，其实see (to it ) that 设法使，务必做到what become of somebody/something 是……的结局，发生于if it had not been for 若不是=but forafter what seemed +时间it was not long before 不久就cab it 乘车 brave it out 拼命干到底walk it 步行 do/go it alone单枪匹马的干beat it =go away 滚make it =succeed in doing 办成功come it 尽自己的分内事come it strong 做的过分lord it over 欺压take it out of sb 拿某人出气have it out with sb 和某人讲个明白be hard put to it 在艰难之中You're it. 你下一个（用于儿童游戏中）Is that it? = Is that all you wanted me for? 你要的就是这些吗？十、 It's + adj + for/of somebody to do sth选择of 还是for，要根据形容词来决定，如果表示人的内在品质，后面引出的名词既是前面形容词的主语，也是动词不定式的逻辑主语，那么用of, 这类形容词有kind, brave, merciful, fine, cruel, selfish, stupid, clever, wise, unfair等；如果表示难易程度，可能性，等外在的特征，而且所引出的词只作后面动词不定式的主语，这类形容词有easy, difficult, hard, impossible, possible, convenient 等等。