it的用法大全

it的用法~

1. 要点提示

it可以用作人称代词，它还可以指时间、天气、距离、上下文等，另外，it还可以作先行词，作形式主语和形式宾语。

2. 用法指南

(1)作为人称代词，it可以用来指东西、动物、婴儿和未确定身份的人。

Where's my book? Have you seen it?

我的书在哪里？你看见了没有？

The dog is in the garden, isn't it?

狗在花园里，是吧？

The baby cried because it is hungry.

婴儿哭了，因为他/她饿了。

(Someone is ringing.)Who's it? It's me.

(有人在按门铃。)谁呀？是我。

(2)it 可以指上下文内容

The Olympic Game will be held in Beijing in 2008. It makes the Chinese proud.

2008年将在北京举行奥运会。这使得中国人非常自豪。

(3)it表示时间、天气、距离等。

What time is it now? It's half past nine.

现在几点了？九点半

It is cold.天气冷。

It's about ten kilometers from the park to the museum.

公园到博物馆大约是十公里。

(4)it用作形式主语或形式宾语

It's very important for us to learn English well.(实际主语是to learn English well)

对我们来说，学好英语很重要。

I found it hard to fly a kite. (实际主语是to fly a kite)

我发现放风筝很难。

非人称代词“它”，可以代“天”“地”等一切事务，无论具体的还是抽象的，用做句子的主语、宾语。如：It is raining. 天在下雨。I love it! 我太喜欢它了。

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……
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-clause
it 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……
it 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-clause
it 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 for
after 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。比如：
It is easy for you to make it.
It is impossible for him to walk 30 miles within one minute.
It is very kind of you to help me.
It is wise of you to take his advice.
十一、it 引起的容易混淆的时间句型
1、 it is/has been +段时间+since-clause 这个句型表示从since谓语动作发生以后到现在或过去所经过的一段时间，意思为："自从……以来已经多久了"，主句多采用一般现在时，从句用过去时，如果表示过去的情况，since 主句用一般过去时，从句用过去完成时，或主句用过去完成时，从句用一般过去时。要注意：since引导时间状语从句时，从句若使用终止性动词，则表示该时间是从现在算起的；若使用延续性的动词，则表示时间是从过去算起的。如：
It's five years since they got married.（从现在算起） It's five years since they were married. (从过去算起)
It is three years since his father passed away.
2、 it be +段时间+before-clause ---这个句型中的时间是段时间（long years, months, weeks, days, hours, minutes）,主句中的谓语动词用肯定式，意思为："过多长时间才……"。主句谓语动词是否定式时，意思为："没过多长时间就……"。主句的时态可用过去时was或将来时will be，用was时，before从句的时态用一般过去时，用will be时，从句常用一般现在时。如
It was not long before he learned those poems by heart.她没过多久就会背那些诗了。
It was long before the police arrived.
It will be hours before he makes a decision.
It will not be hours before we meet again.
3、 it be +点时间+when-clause这个句型中，it指时间，而且表示时间的词语前没有介词，时间为具体时间。主句中的谓语部分和从句中的谓语动词在时态上一般是一致的，主句是will be时，从句中用一般现在时替换将来时。如：It was already 8 o'clock we got there.
It will be late afternoon when they get there.
it be +时间+that-clause 此句型为强调句型
4、 it be +high/about 时间+that-clause 此句型是个虚拟语气句型，表示是该做……的时候了，此时无论主句中的be是什么时态，从句中的谓语动词一律用一般过去时或者should do，high和about是用以加强语气的。如：It is high time that we he went to school.
It is time that we should make people's life a little better.
6、It/This/That be the first(second/third…) time that-clause这个句型表示说话时为止某人的一种经历，关键是time前面的序数词，主句是is时，从句要用现在完成时，主句是一般过去时，从句要用过去完成时。
This is the first time (that) these Europeans have visited the Great Wall.
It was the fifth time (that) I had paid a friendly visit to America.
十二、下面的句型中用there而不用it。
There is something wrong with… ……有毛病
There is no doubt of/that 无疑……
There is no need for/to do 不需要做……
There is no denying 无可否认……
There is no hurry about 无需慌忙……
There is no difficulty in 在……方面没有困难
There is no help for ……没有办法
There is no deference between ……没有区别
There is no lack of 有很多的，不缺乏
There is no possibility of/that 没可能
There is no room for 没有……的余地
There is no sense in ……是没有意义的
There is no sign of 没有……的迹象
There is no saying that ……难以断言，很难说
There is a chance that/of 很可能
There is a possibility that/of有可能
There is a slim hope of ……有微小的希望
There is some difficulty in 在……有困难
There is some trouble in 在……有麻烦
There appears to be 似乎有
There seems to be似乎有，好像有
There used to be （过去）常常有，原来这里有
There was a time when从前曾经有一个时候
There is evidence that ……显然
There is no probability of/that很难有/会

1. 要点提示

it可以用作人称代词，它还可以指时间、天气、距离、上下文等，另外，it还可以作先行词，作形式主语和形式宾语。

2. 用法指南

(1)作为人称代词，it可以用来指东西、动物、婴儿和未确定身份的人。

Where's my book? Have you seen it?

我的书在哪里？你看见了没有？

The dog is in the garden, isn't it?

狗在花园里，是吧？

The baby cried because it is hungry.

婴儿哭了，因为他/她饿了。

(Someone is ringing.)Who's it? It's me.

(有人在按门铃。)谁呀？是我。

(2)it 可以指上下文内容

The Olympic Game will be held in Beijing in 2008. It makes the Chinese proud.

2008年将在北京举行奥运会。这使得中国人非常自豪。

(3)it表示时间、天气、距离等。

What time is it now? It's half past nine.

现在几点了？九点半

It is cold.天气冷。

It's about ten kilometers from the park to the museum.

公园到博物馆大约是十公里。

(4)it用作形式主语或形式宾语

It's very important for us to learn English well.(实际主语是to learn English well)

对我们来说，学好英语很重要。

I found it hard to fly a kite. (实际主语是to fly a kite)

我发现放风筝很难。

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