四级语法：cet4-语法-it的用法
As soon as is born he begins to die.
It 的用法
一． It做人称代词
1. 指事物
作为人称代词，it 可以除人以外的一切事物或动物。如：
I dropped my watch and it broke.
It’s hard work, but I enjoy it.
“Where is the dog?” “It’s in the room. ”
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2. 指人
it 指人主要用于指不性别不明的婴儿或用于确认某人的身份。如：
Is it a boy or a girl?
There is a knock on the door. It must be my brother.
说明:在答语中，常用来指本人，如说 It’s me。
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3. 代替某些代词
代词 it 还可用于代替上文提到的指示代词this, that 以及复合不定代词 something, anything, nothing等。如：
---“What’s this?”
---“It’s a new kind of mobile phone. ”
Nothing is wrong, is it? 没出什么问题，是吗?
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二． It做非人称代词
it有时并不指具体的东西，而泛指天气、时间、日期、距离、价值、度量、温度、环境等，称为非人称的it：
1.指天气：
It is a lovely day, isn’t it?
It is a bit windy.
2.指时间: It was nearly midnight when she came back.
3.指环境: It was very quiet in the café.
4.指距离：
It is half an hour’s walk to the city centre.
5指日期：
What's the date today? It's the eleventh,October.
6指季节：
It is summer now.
7指度量：
It is about 20 pound/kg
8.指价值：
--- What's the cost of the dictionary?
---It is sixty-three.
9 It's 35 centigrade now. So I feel hot.
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Tom's mother kept telling him that he should work harder,but ______didn't help.
A.he B.which C.she D.it
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It用于强调句：
1. eg: It was the boy who caused the fire yesterday.
It’s I that/who am going to see my dentist.
It’s him that my sister love best.
It was at five o’clock that he came here.
Where is/was it that you met your formal teacher?
以上为it’s(was)+强调部分+that(who)…
wh-
is it that+s+V?
h-
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He was nearly drowned once.
-When was ______?
-______was in 1998 that he was in middle school.
A.that;It B.this;This C.this;It D.that;This
Was ______ that I saw last night at the concert?
A.it you B.not you C.you D.that yourself
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it充当形式主语：
1. It was very obvious that he was telling a lie.
=That he was telling a lie was very obvious.
It is true that the earth moves around the sun.
=That the earth moves around the sun is true.
以上为it’s clear/true/certain/possible/obvious+that(主语从句)
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2.It’s important that we (should) help each other.
It’s necessary that he remember as many words as possible.
It is strange that he stands here who left for US an hour ago.
以上为It’s important/necessary/strange+that+S+(should)+V特殊形容词，切记虚拟
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可别忘了：it’s important/necessary/strange+for sb+to do sth
1.Is______necessary to complete the design before National Day?
A.this B.that C.it D.he
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3.It’s suggested that sports meeting (should) put off.
以上为it’s
ordered/commanded;suggested;required;proposed+that+S(should)+V
表建议，要求，命令，主语从句
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4..It’s a shame that such a thing should happen in my class.
It’s a pity that he was ill,so he didn’t came here.
It’s a pity/shame that + should +V,译为竟然
S+V(该什么就什么)
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还有It’s a fact/a wonder/no wonder that
______is a fact that English is being accepted as an international language.
A.There B.This C.That D.It
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5.It’s reported that another accident happened in this area.
It’s said that he would come.
It’s estimated that 1.8 persons die and 4.1 persons was given to birth per seconds.
It’s said/reported/announced/claimed/believed/
thought/accepted/estimated/announced…+that S+V
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6. It doesn’t matter if they are young or lack of experience.
It didn’t matter whether you understood me.
It doesn’t matter whether you are rich,I will marry to you.
以上为it doesn’t/didn’t if/whether
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7.eg:It happened that he met his friend in the street.
It seems that no one knows he is a liar.
It appeared that she didn’t like him.
It occurs to me that I can solve the problem in this way.
以上为It occurs/happens/disappears/appears/seems/occurs to sb that +S+V(主语从句)
Vi linkV
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8. eg:It took thousands of people many years to build the Great Wall.
It takes me the whole morning to accomplish the work.
It takes me quite a long time to understand the meaning of the painting by PICA-SSO.
以上为it takes/took sb some time to do sth
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9.eg：It’s kind of you to say so.=You are kind to say so.
It’s brave of you to save the girl who was in the river.
=You were brave to save the girl who was in the river.
It’s cruel of him to do that.=He is cruel to do that.
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以上为it作形式主语替代不定式
It is kind ( of sb. ) to do sth. 该句型中的不定式短语是真正主语，如果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形容词。 常见的有： bad ， brave ， careless， clever ， cruel ， foolish ， good （好心的）， honest ， horrible ， kind ， lazy ， modest ， naughty ， nice（有教养的）， polite， rude ， silly ， stupid ， wise ， wrong（错误的）等。
It’s kind of sb to do sth可改写为：sb. is kind to do sth 。
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10.eg：It’s easy for her to do it.
It’s necessary for me to learn English well.
It’s important for them to seize the chance.
It’s necessary/easy(adj) for sb to do sth
11.eg:It’s no good learning English without speaking English.
It’s no use studying in the university.(大学无用论 错)
It’s no good trying to persuade me.
以上为It’s no good/use doing sth该句型中的真正主语是动名词短语，主句中的表语可以是no good， ( not any good ) ， no use ， ( not any use )。
It作宾语
I hate——when people talk with their mouth full.
A.it B.that C.these D.them
It用在不能直接跟宾语从句的动词后，尤其表示好恶的动词，for instance,enjoy,like,love,dislike,hate,don’t mind,be fond of, feel like,see to.
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补充：see to it
• 1. 设法使，务必要，保证
See to it that there is enough money.
When you start the engine, you must see to it that the car is in neutral.
If you can provide the wine, I can see to the food.
He has to see to the luggage.
see to sth.处理；料理 There was much to see to.
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see to it that…注意做到；务必要...
see to it that you are here punctually tomorrow morning.
you will see to it that your methods are ideal
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• 3. 照料，努力使，注意把
see to 照顾，处理，注意...see to it that…照料，努力使，注意把...seeing that…因为，鉴于，既然
I' ll see to it that everything is ready in time.
and i can certainly see to it that this house is managed。
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It做形式宾语
1. eg:We think it our duty to clean the classroom.
I think it good to get up early.
The president thought it necessary to invite Professor Smith to speak at the meeting.
They found her nervous to speak to people.
We think it important to learn a foreign language.
Sb finds/thinks/feels/guesses it adj/n(for sb)+to do
某人认为做某事。。。
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该句型中的it作形式宾语。为了记忆方便我们可称该句型为“7123结构”
7指主句中的常用的动词：think, believe, make, find, consider, feel, take.
1指的是形式宾语it .
2指的是宾补的两种形式：形容词和名词
3指的是真正宾语的三种形式：不定式短语，动名词短语或that引导的宾语从句。
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We think it our duty to clean our classroom every day.
XiaoLi felt it important learning English well.
They found it difficult that they would finish their work in two days.
I don't think ______ possible to master a foreign language without much memory work.
A.this B.that C.its D.it
-Do you like ____here?
-Oh, yes .The air, the weather, the way of life. Everything is so nice. (2004 全国卷二)
A. this B. these C. that D. it
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其他用法
1.It’s high time that children went to bed yesterday.
It’s time that we took actions to protect the environment.
It’s time that you should get out of the bad habit.
It’s just time/time/high time+S+did/were;should do 正是。。。的时候。。。
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2.It’s the first time that she has been here.
=This is the first time she has been here.
it's the first time that l have visited china.
This/that/It is the last/first/next time (that)
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3.It’s five years since he joined the party.=It’s five years ago he joined the party.
It’s five years since he had enjoyed such a delicious meal.
It’s+时间+since+S+V(V延，否定翻译；V非延续，该翻什么就是什么)
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4.eg:It was three days before he finished the job.
It will be two weeks before everything returns to normal.（过了很久。。。才）
It won‘t be long before we meet again.（用不了多久。。。就）
以上为It was/is.will(won’t) be…before+S+V
若为肯定，译为过了很久。。。才；若为否定，译为没过多久。。。就
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5.eg:It looks as if he is ill.
It looks as if it were broken.
It seems as if it were winter.
It looks/seems+as if +S+would/might
were/did 虚拟
had done
自然语序
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6.eg:It’s not until she took off her glasses that I realized she was a famous star.
=I didn’t realize she was a film star until she took off her glasses.
It was not until the child fell asleep that his mother left the room..
=His mother didn’t leave the room until the child fell asleep.
以上为it is/was not until…that…
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7.eg:It was five o’clock when he came here.(时间状从)
It was at five o’clock that he came here.（强调句---时间）
It was the room where he met her yesterday morning.(地点状从)
It was in the room that he met her yesterday morning.（强调地点）
以上为It’s …when/where +S+V
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1.She heard a terrible noise,______brought her heart into her mouth.
A.it B.which C.this D.that
2.I hope there are enough glasses for each guest to have______?
A.it B.those C.one D.them
3.if I can help____,I don’t like woring late into the night.
A．so B.it C.that D.them
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