?Never be afraid of grammar
?Collect some examples;
?Watch them very carefully;
?Find out something in common;
?Try to use the rules ---- practise.
it用法完全归纳
一、it 作人称代词的用法
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. 我把手表掉在地上摔坏了。
It’s hard work, but I enjoy it. 工作很辛苦，可是我乐意干。
“Where is the dog?”“It’s in the bedroom. ”“狗在哪?”“在卧室里”。
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? 是男孩还是女孩?
There is a knock on the door. It must be the postman. 有人在敲门，一定是邮递员。
【说明】在答语中，常用来指本人，如说It’s me。
3.代替某些代词
代词it 还可用于代替指示代词this, that 以及复合不定代词something, anything, nothing等。如：
“What’s this?”“It’s a new machine. ”“这是什么?”“是一种新机器”。
Nothing is wrong, is it? 没出什么问题，是吗?
二、it 作非人称代词的用法
1.基本用法
it 作非人称代词的用法，主要用于指时间、距离、价值、天气、气候及温度等自然现象。如：
It’s too late to go there now. 现在去那儿已经太迟了。
It rained all day yesterday. 昨天下了一天的雨。
It can get very hot here. 这里有时会很热。
2.用于某些句型
It’s time for sth. 该做某事了。
It’s time to do sth. 该做某事的时候了。
It’s time for sb to do sth. 某人该干某事了。
It’s (about / high) time + that-从句. 某人该做某事了。(从句谓语用过去式，有时也用“should+动词原形”)
It’s first (second) time + that-从句. 某人第几次干某事。(从句谓语用现在完成时)
It’s + 时间段+ since-从句. 自从……有一段时间了。
It’s + 时间段+ before-从句. 过多长的时间才……
三、it用作形式主语
1.基本用法
当不定式、动名词、从句等复杂成分用作句子主语时，为保持句子平衡，通常把真正的主语放在句末，而在句首使用形式主语it。如：
It’s very important to remember this. 记住这一点很重要。
It’s hard work climbing mountains. 爬山是费劲的事。
It’s unknown when he will come. 他什么时候来还不知道。
2.用作形式主语的的重要句型
(1) It + be + adj. for (of) sb to do sth 某人做某事……
It is hard for him to make up his mind. 他很难下定决心。
It was foolish of her to say such a thing. 她说那样的话，真是太蠢了。
【说明】介词of 与for 的区别是：of 用于指某人的性格、属性、特征等，介词for表示对象，意为“对……来说” (from https://www.doczj.com/doc/0110643997.html,)。
(2) It takes sb + 时间段+ to do sth. 某人做某事花了……时间
It takes years to master a new language. 要花多年的时间才能掌握一门新的语言。
【说明】此句型可以有以下多变种变体：It took me an hour to write the letter. =The letter took me an hour (to write). =I took an hour to write the letter. 我写这封信花了一个小时。
(3) It is up to sb to do sth. 该由某人做某事
It’s up to you to to make the choice. 得由你来作选择。
(4) it look (seem, appear, happen, occur) that [as if]…似乎……
It seemed as though he didn’t recognize me. 他似乎没认出我来。
It happened that I was out when he called. 他打电话时我碰巧不在家。
(5) If it were not for… / If it hadn’t been for…若不是因为……
If it were not for their help, we couldn’t have got over the difficulties. 要不是他们帮助，这些困难我们不克服不了的。
四、it用作形式宾语
1.基本用法
当不定式、动名词、从句等复杂成分用作宾语且其后跟有宾语补足语时，通常会在宾语补足语前使用形式宾语，而将真正的宾语移至句末。其基本结构为“动词+it+宾语补足语+不定式(动名词或从句)”。如：
I find it difficult to do the job well. 我发现做好这件事不容易。
I think it best that you should stay here. 我认为你最好住这儿。
We think it no use complaining. 我们认为抱怨是没有用的。
2. 用作形式宾语的几个特殊结构
(1)动词+ it + that-从句。如：
I like it that you came. 你来了，我很高兴。
I take it (that) he will come on time. 我认为他会准时来的。
You can put it that it was arranged before. 你可以说这是以前安排的。
Rumor has it that the defence minister will soon resign. 据传闻，国防部长不久就要辞职。
【说明】能用于此结构的动词不多，常见的有have, take, put, like 等。
(2)动词+ it + when (if)-从句。如：
I dislike it when you whistle. 我不爱听你吹口哨。(from https://www.doczj.com/doc/0110643997.html,)
We really appreciate it when she offered to help. 她来帮忙了，我们十分感激。
I’d prefer it if I didn’t have to do so much work. 要是我不必
做那么多工作，好就太好了。
【说明】能用于此结构的动词不多，常见的有enjoy, hate, love, like, dislike, appreciate, prefer 等。
(3)动词+ prep + it + that-从句。如：
See to it that you’re not late again. 注意千万不要再迟到。
Look to it that this doesn’t happen again. 注意不要再发生这种事。
You may rely on it that he’ll come to meet you. 你放心，他会来接你的。
I can’t answer for it that he will come. 我不能保证他会来。(from https://www.doczj.com/doc/0110643997.html,)
【说明】能用于此结构的动词不多，常见的有see to, look to, insist on, stick to, depend on, answer for 等。
(4)动词+ it + 介词短语+ that-从句。如：
I owe it to you that I am still alive. 多亏有你我才仍然活着。
I took it for granted that he would help us. 我认为他会帮助我们的。
【说明】能用于此结构的动词不多，常见的有take it for granted, bring it to sb’s attention, owe it to sb 等。
It 的用法练习
一．单项选择。
1.Was it during the Second World War _____he died?
A.that
B.while
C.in which
D.then
2.Is ____ necessary to take off our shoes when we enter the lab?
A. everyone
B.this
C.her
D.it
3. Is ____ possible to fly to the moon in a spaceship?
A.now
B.that
C.it
D.man
4. I don’t think ___ possible to master a foreign language without much memory work.
A.this
B.that
C.its
D.it
5.She heard of a terrible noise, ___ brought her heart into her mouth.
A.it
B.which
C.this
D.that
6.Alice received an invitation from her boss, ____ came as a surprise.
A.it
B.that
C.which
D.he
7.Does ____ matter if he can’t finish the job on time?
A.this
B.that
C.he
D.it
8.Tom’s mother kept telling him that he should work harder, but ____ didn’t help.
A.he
B.which
C.she
D.it
9.The weather turned out to be very good, ___ was more than we could expect.
A.what
B.which
C.that
D.it
10.____is a fact that English is being accepted as an international language.
A.There
B.This
C.That
D.It
11.I hope there are enough glasses for each guest to have _____.
A.it
B.those
C.them
D.one
12.It was about 600 years ago___the first clock with a face and an hour hand was made.
A.that
B.until
C.before
D.when
13.I hate ____ when people talk with their mouths full.
A.it
B.that
C.these
D.them
14.It was only when I reread his poems recently____ I began to appreciate their beauty.
A.until
B.that
C.then
D.so
15.It is the ability to do the job ____ matters not where you come from or what you are.
A.one
B.that
C.what
D.it
16.It ____ you that ____ to blame.
A.is;is
B.is; are
C.are;are
D.are;is
17.Was_____that I saw last night at the concert?
A.it you
B.not you
C.you
D.that you
18.____ electricity plays such an important part in our life?
A.Why is it that
B.Why is it
C.Why it is that
D.Why is that
19.It was ____ he said _____ disappointed me.
A.what;what
B.that;that
C.what;that
D.that;what
20.It was in the lab ___ was taken charge of by Professor Harris ___ they did the experiment.
A.which; that
B.that; what
C.whom; that
D.which; where
二.分析it成分，辨清相似句型。
21.①_____ is well know to us all that the earth is round.
②____ is well known to us all, the earth is round.
A.That
B.As
C.It
D.Which
22. ①_____doesn’t matter much whether he’ll come to the party.
②I feel ____ an honour to be invited to speak here.
A.this
B.it
C.that
D.what
23. ①___ no wonder that he has passed the exam.
②___ no need for you to wait here.
A.There being
B.It was
C.It is
D.There is
24. ①Was it the house ____ Abraham Lincoln was born?
②Was it in the house ____ Abraham Lincoln was born?
A.that
B.where
C.which
D.both A and B
25. ①It’s very kind ____ you to help us.
②It’s very important _____ you to keep the balance of nature.
A.for
B.of
C.to Dwith .
26. ①It is no good ____ such a thing.
②It’s of no importance _____ such a thing.
A.do
B.to do
C.doing
D.done
27.①It's time that we ____ to school.
②It is the second time that we _____ to Beijing.
A.go
B.went
C.have been
D.have gone
28.①It's tomorrow ____ he is going to Beijing.
②It was 8 o'clock _____ he went to school.
A.that
B.when
C.before
D.since
29.①It is 3 years ____ he joined the army.
②It will be 3 years ____ we meet again.
A.before
B.after
C.since
D.when KEYS：
1-5ADCDB 6-10CDDBD 11-15DAABB 16-20BAACA
21.CB 22.BB 23.CD 24.BA 25.BA 26.CB 27.BC 28.AB 29.CA
?Never be afraid of grammar ?Collect some examples; ?Watch them very carefully; ?Find out something in common; ?Try to use the rules ---- practise. it用法完全归纳 一、it 作人称代词的用法 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. 我把手表掉在地上摔坏了。 It’s hard work, but I enjoy it. 工作很辛苦，可是我乐意干。 “Where is the dog?”“It’s in the bedroom. ”“狗在哪?”“在卧室里”。 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? 是男孩还是女孩? There is a knock on the door. It must be the postman. 有人在敲门，一定是邮递员。 【说明】在答语中，常用来指本人，如说It’s me。
3.代替某些代词 代词it 还可用于代替指示代词this, that 以及复合不定代词something, anything, nothing等。如： “What’s this?”“It’s a new machine. ”“这是什么?”“是一种新机器”。 Nothing is wrong, is it? 没出什么问题，是吗? 二、it 作非人称代词的用法 1.基本用法 it 作非人称代词的用法，主要用于指时间、距离、价值、天气、气候及温度等自然现象。如： It’s too late to go there now. 现在去那儿已经太迟了。 It rained all day yesterday. 昨天下了一天的雨。 It can get very hot here. 这里有时会很热。 2.用于某些句型 It’s time for sth. 该做某事了。 It’s time to do sth. 该做某事的时候了。 It’s time for sb to do sth. 某人该干某事了。 It’s (about / high) time + that-从句. 某人该做某事了。(从句谓语用过去式，有时也用“should+动词原形”) It’s first (second) time + that-从句. 某人第几次干某事。(从句谓语用现在完成时)
it的用法及强调句型 it的用法 一、it作指示代词【完成句子】用one，ones，it，that，those填空 (1) — I can't find my watch. —You haven't found ______？If you want to buy a new ______，I suggest you buy ______ made in China. (2) We've got a big cup and two small ______. (3) The weight of an elephant is much greater than ______ of a tiger. (4) The books on the first shelf are easier than ______ on the second shelf. (5) The boy told his story and ______ of the girl upstairs. 【答案】(1) it; one; one (2) ones(3) that (4) those / the ones (5) that / the one 【结论1】 ①指代上文提过的事物时，it指的是同名同物，相当于the＋名词； ②one指的是同名异物，表示单数可数名词相当于a ＋名词；a / an＋形容词＋one等于a / an＋形容词＋名词；复数形式用ones； ③that后面常有后置定语，有特指意义，代替不可数名词或单数可数名词，相当于the＋ 名词； ④复数名词用those，相当于the ones。 【例句观察】— Someone is knocking at the door. Who is it? — It must be Leo. He said he'd come to see me. 【结论2】it指代人时，常指小孩或身份不明的人。 【例句观察】It's too quiet in the room. Everyone just keeps silent. 【结论2】it可用以指代环境或情况。 (6)— What time is it now? — It's half past seven. (7)— It is spring now and it's warm these days. 【结论3】it可用以指代时间、季节、天气或距离。 【注意】it指代时间时，有如下一些句型： (1) It is time for sth. (for sb.)to do sth. / that－从句(should do / did, 必须用虚拟语气) 例：① It's time for lunch. ② It's time for us to clean the house. ③ It's time that we should clean the house. ＝It's time that we cleaned the house. (2) It is / has been ＋some time ＋since－从句(从句用一般过去时) It is 10 years since I graduated from college. (3) It / This/That is the first / second time that－从句(必须使用现在完成时)这是某人 第……次做了某事。 It / This/That was the first / second time that－从句(必须使用过去完成时) 例：①It is the second time that she has visited the Great Wall. ②This was the first time that I had come late to school. (4) It was ＋时间点＋when －从句 例：It was evening when we got home. ＝It was evening in which we got home. (5) It was / will be ＋some time ＋before －从句 例：①过了5年他们才从北大毕业。 It was five years before they finally graduated from Beijing University. ②不久，我们就要从我们学校毕业了。 It won't be long before we graduate from our school. 二、it作形式主语 1.代替主语从句 ①It is clear ( obvious，true，possible certain....) that ..... “清楚（显然，真的，肯定．．．）” ②. It is important ( necessary，right，strange，natural...) that ... 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 important that we (should) learn English well.
英语it的用法小结 江苏沛县湖西中学鹿俊先 221611 1．实义的it。 实义的it用来指代具体的内容。 1．1．指代上文提过的除人以外的生物或非生物，复数形式为they。 The earth is the planet that we live on. It is the fifth largest planet of the solar system. This car is not fast enough. It can only do 60 miles an hour. John is in the school football team. It was reorganized last year. “Where is the cat?”“It is in the garden.” “Where are the cats?”“They are in the garden.” 1．2．指代上文提过的性别不明或无须指明性别的小孩。 To feed a child without also educating it is a fault in the father. What’s matter with the baby? It has been crying. Her baby is due next month. She hopes it will be boy. 1．3．作主语指代上文提过的人，谓语用以指明该人的身份。 “Who is that at the door?”“It’s the postman.” The footsteps drew nearer and she saw from behind the curtain who her visitor was. And she opened the door to welcome her. It was Maria Cragg.（文中的主人已知客人是谁，所以在使用It之前就使用了her，但读者依然不明白，所以最后用It 作主语谓语指明该人的身份。） 1．4．作主语，指代谓语部分所说明的自然现象（如：风、雨、热、冷）、季节、时间、距离、环境等。 It was raining hard when he got off the train. Is it very cold in your country in December? It is high time (that) we had a rest. It was early spring / 1986 when we first met. It is six months since he lost his job. It won’t be long before we meet again. It is only two hours’ ride / eighty miles to Cleveland. It is very dark / pretty / crowded / noisy /dirty in the room. 1．5．指代上下文或一定语境所表明的情况、事件等。 “I’m trying to change my job.”“You’ll find it difficult.”（it指调换工作这件事。） “I’ll have to work all night through.”“It is awful.”（it指你彻夜工作这件事。）You’ll be in trouble before you know it.（it指你陷入困境这件事。。） English is very important, and we all know it.（it指英语的重要性。） When the factory closes, it will mean 500 redundancies.（it指工厂倒闭这件事。有些学者把此处及以下四个句子中的it解释为形式主语或形式宾语但却无法解释没有真正的主语/宾语何来形式主语/宾语。） I’d appreciate it if you could help me with the work.（it指你帮助我工作这件事。）
It的用法及典型句型归纳 一、人称代词it的最基本用法是作代词，主要指刚提到的事物，想法，以避免重复;也可以指性别不明或性别被认为是不重要的人或动物；未指明但谈话双方都明白的事情或情况。 ①They watched the train until it disappeared in the distance. ②Is this your dog？No, it isn’t. ③I hate it when people talk with a full mouth.． 二、.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： It is a lovely day, isn’t it? // It was nearly midnight when she came back. It is April First today. // It is some 3000 kilometers from A to B. It is three dollars. // Today it is 30 degrees centigrade. 三、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 ＂┅清楚的（显然的，真的，可能的,肯定的．．．）＂ ⑵It is important ( necessary，right，strange，natural...) that + (should ) do (虚拟语气) ┅是重要的(必要的,对的,奇怪的,自然的┅) ⑶It is said (reported/ learned/believed/thought/known/told/hoped.....) that = sb / sth is said (reported/ believed /thought…) to do( to be doing/ to have done) sth ＂据说（据报道，据悉．．．）＂。 ⑷It is suggested ( advised/ ordered / demanded/ insisted/ commanded... ) that +(should ) do ＂据建议；有命令．． ⑸It is a pity ( a shame /an honour/a good thing/a fact,/a surprise/... ) that 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。 小练一下： It is very clear that he’s round and tall like a tree. = It is important that we (learn) English well. It is necessary that he (remember) these words. It is said that he has come to Beijing. = It is reported that another earth satellite has been put into orbit. = It is suggested that the meeting ( put off). It was ordered that we (arrive) there in two hours. It is a pity that such a thing ( happen) in your class. It is a pity that he (be) ill. 2.作形式主语替代不定式 . ⑴It is kind ( of sb. ) to do sth.= sb be kind to do sth.一般都是表示人的特性的形容词。如： bad /brave /careless/ clever /cruel / foolish / good （好心的）/ honest/ kind / lazy / modest/ naughty/ nice（有教养的）/polite/ rude / silly / stupid / wise ，等。 Eg. It is kind of you to give me a hand. = ⑵It is necessary ( for sb. ) to do sth. .不定式的逻辑主语是由for引起。常见的形容词有： Important/ necessary/ natural/ easy / safe / common / normal / hard / difficult / dangerous/ unusual/ rare / impossible / pleasant Eg. It is important for her to come to the party.
it用法完全归纳 一、it 作人称代词的用法 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. 我把手表掉在地上摔坏了。 It’s hard work, but I enjoy it. 工作很辛苦，可是我乐意干。 “Where is the dog?” “It’s in the bedroom. ” “狗在哪?”“在卧室里”。 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? 是男孩还是女孩? There is a knock on the door. It must be the postman. 有人在敲门，一定是邮递员。 【说明】在答语中，常用来指本人，如说It’s me。 3. 代替某些代词 代词it 还可用于代替指示代词this, that 以及复合不定代词something, anything, nothing等。如： “What’s this?” “It’s a new machine. ” “这是什么?”“是一种新机器”。 Nothing is wrong, is it? 没出什么问题，是吗? 二、it 作非人称代词的用法 1. 基本用法 it 作非人称代词的用法，主要用于指时间、距离、价值、天气、气候及温度等自然现象。如： It’s too late to go there now. 现在去那儿已经太迟了。 It rained all day yesterday. 昨天下了一天的雨。 It can get very hot here. 这里有时会很热。 2. 用于某些句型 It’s time for sth. 该做某事了。 It’s time to do sth. 该做某事的时候了。 It’s time for sb to do sth. 某人该干某事了。
十六、it用法小结 题1 指出it在句中的作用，并译成汉语。 1．Who’s that baby? It’s me. 2．This is my book. I got it just now. 3．Look at the bird. It’s always come my window. 4．It was she who did it. 5．It is the farm that we visited last week. 6．Who is it ? It’s Tom. 7．It’s hot today. We shan’t go there. 8．What day is (it) today? It’s Sunday. 9．How long is it ? It’s five metres long. 10．What time is it ? It’s six o’clock. 11．How far is it from here? It’s 50 kilometres. 12．It is three years since I saw him. 13．It isn’t easy to learn English well. 14．We found it easy (difficult) to learn English. 15．What’s the date today ? It is January lst. 题2 选择填空。 1．The book is not mine. I borrowed from library. A．that B．it C．this D．him 2．Doesn’t matter if be can’t finish the job on time? A．this B．that C．he D．it 3．I don’t think necessary for you to worry too much about your son. A．those B．that C．it D．this 4．appears that the nurse is too tired. A．It B．She C．This D．That 5．Is possible to fly to the moon in a spaceship? A．now B．man C．that D．it
It的用法 一、Tell the functions for “it” in each sentence: 1、---What’s the weather together ---It is fine. 2. It is hard to communicate with him. 3. I find it hard to communicate with him. 4. It is Li that who cleaned the classroom. 5. It is a book. 二、It 用法归纳 1，指代it （1）.用作人称代词：指代物、整个句子 （2）用作非人称代词 2，形式it：（1）作形式主语（2）作形式宾语 3，强调it 4，特殊句型 5.在答语中指代this/that： 1).--- Whose book is that ---It’s mine. 三、特别注意： it, one和that作替代词的用法及区别 1. it代替前面提到的同一事物,该事物既可以是可数名词也可以是不可数名词。 (特指，指代单数，指代物，同名同物) Can I borrow your pen—Sorry， I’m using it.
2. one代替前面提到的同类事物中的一个。该事物只能是可数名词,前面可以有冠词,也可以被this、that或形容词修饰,其后也可以有定语。（泛指，指代可数名词，指代人或物，同名异物） I have a bike. Do you have one Eg: (1).I bought a dictionary three years ago and I am still using______ now. (2) I bought a dictionary three years ago but I am going to buy a new _______soon. (3). that代替前面提到的同类事物中特指的一个。该事物既可以是可数名词也可以是不可数名词,必须要有后置定语,但不可以有前置修饰语。（特指，指代单数或不可数，指代物，后面有定语） The coffee produced in Brazil is more famous than __________in Mexico. 四：形式主语、宾语、强调句及其他
高考重点：It的用法以及含有it的句型 英语中it 一词结构看似简单，但其词义广泛，使用范围很广，常令一些初学者感到头痛。It用法及其句型和固定搭配，是英语语法的重点、难点，又是近几年考试的热点,在高考中也是重现率较高的语言点，其考查方式多通过“单项填空”进行，偶尔也出现在“短文改错”和“完形填空”中。因此在复习中应给予足够的重视。下面笔者就it的用法简单归纳如下。 一、代替上文中提到过的人或事物。指代人时，一般用于小孩或身份不十分明朗的人。 1) －Who is the baby? －It‘s my teacher’s son． 2) －Who is that gentleman? －It's my friend Tom．He(不可用It) wants to see you． 不定代词one 指代前文提到的同类事物之一，而it 特指上文中提到的同一事物。试对比：This pair of shoes is small. May I have another one？（泛指的另一双） 这又鞋子太小了，再拿一双给我看看好吗 My pen is missing.Ican’td find it. 我的钢笔丢了找不到了(it指my pen) 二. it 作为无人称动词的主语，表示天气，时间，距离，环境情况等等。这时的it 不指某个具体的东西。没有明确的含义。译成汉语可不必译出来。如 1).It‘s half an hour’s walk from here to our school． 从这儿到我们学校是步行一个小时的路程 2) It‘s nice and warm here． 这里非常暖和 3) But it's two o'clock now, and it's time for us to go to school． 两点了该是上学的时间了 4) It’s quite close in the room . Let’s open the window for a while。 房间里太闷，把窗子打开一会儿吧。 三.“It”可以代替指示代记词This ,that . 例：---Whose dictionary is that ?---It is mine 四,用作形式主语或形式宾语。 1. 当作主语的不定式、－ing短语或从句太长时，往往用it作形式主语，而将真正的主语移至句末， 以避免句子头重脚轻。it作形式主语的常见句型： ★it替代动词不定式作主语的常见句型为: 1) It is necessary /important /possible/easy…..for sb to do…. 如:It is necessany to learn a foreign lanuage.学一门外语是有必要的。 It is kind /foolish/polite/brave/careless…of sb to do.常用形容词有:clever/wise/bright/silly/foolish/stupid/kind/cruel/right/wrong等如: It is kind of you to help me=Y ou are kind to help me.:谢谢你帮助我. 3)It is up to sb to do sth.该由某人做某事如:It is up to you to decide.由你来决定. 4)It is (not)like sb to do sth.做某事是(不)是某人的行为. 如:It was not like you to have said such rude words. 说出这样粗鲁的话不像你的行为.
高三复习之it用法归纳 （一）. it用作代词 1. 代替前面提到的事物或事件。 “Where is the dog?”----It’s in the bedroom. I am sending you some advice. It might help you. He was late again. It made the teacher angry. 2. 指人。it指性别不明的婴儿或身份不确定的某人。如： “Who is that?”----“It is me.” There is a knock on the door.----It must be the postman. 3. 代替this, that或某些不定代词something, anything, nothing等。如： What’s this?----It’s a new machine. Nothing is wrong, is it? 4. it 作非人称代词的用法，主要用于指时间、日期、距离、天气、地点及温度等。如： It is sunny today. It is Friday today. It’s 6 miles to the nearest hospital.It is very warm in the house. （二）. it用作形式主语 当不定式、动名词、从句等作句子主语时，为保持句子平衡，通常把真正的主语放在句末，而在句首使用形式主语it。如： 1. It + be + adj + for (of) sb to do sth of 用于指某人的性格、属性、特征等，介词for表示对象，意为“对……来说” It is hard for him to make up his mind. It is foolish of her to say such a thing. 2. It is no good \ no use\ useless\ a waste of time + doing sth 做什么是没有用的\浪费时间 In my opinion, it’s no use arguing with him. 3. It +be + adj +主语从句… 形容词有：obvious\ clear\amazing\ certain\ possible\true等。形容词是:important\strange \necessary\essential等，主语从句中谓语动词用虚拟语气：(should )+ do It is obvious that your painting is better than mine. It is necessary that we (should ) drink 500ml water every day. 4. It +be + n +主语从句\to do…这是。。。 名词有：a pity\a shame\ a fact\ an honor\ no wonder\ one’ duty… It is a pity that he failed in the driving test again. 5. It is + v-ed+主语从句…据说\报道\认为\建议。。。 动词过去分词有：said\ reported\ thought\ believed\ known\ announced\expected\acknowledged…注意①：It is suggested\recommended\ordered\commanded\required…that+( should) do It is strongly recommended that effective measures should be taken to ban smoking. It is widely acknowledged that …. 这是公认的。。。 ②句型的转换：It is said that Bell invented the telephone. Bell is said to have invented the telephone. Linda is said to be interviewing the famous star now. 6. It is likely that… = Sb be likely to do\have done\to be doing 。。。是可能的。 It is likely that the MH370 plane will be found one day. The MH370 plane is likely to be found one day.
第二章“It”用法及其句型和固定搭配讲解 "It" 用法及其句型和固定搭配，是高中英语语法的重点、难点，又是近几年高考的热点，因此应给予充分的重视，现将it用法归纳如下： 一、It用作实词 表达以下概念:指代前文提到的事物，前文中的this, that；替代前文中的内容；指代一位性别不明的小孩或未知的人；指代未指明但谈话双方都知道的那件事；指代时间、天气、气候、距离等自然现象…… 二、It用作形式主语 替代作主语的从句、动词不定式、动名词，而把真正作主语的从句、动词不定式、动名词置于句尾。 It 作形式主语的常见句型： 1. 代作主语的动词不定式，其句型为 (1) It be adj. (for sb.) to do sth. 此处adj. 通常为描述事件的形容词：easy, difficult, hard, necessary, unnecessary, possible, impossible, likely, unlikely, right, wrong, important, unimportant, legal, illegal, well-mannered, ill-mannered, polite, impolite, clear, obvious, certain, suitable, proper, fit, useful, useless, dangerous… 例It is illegal (for a teenager) to drive a car without a license. (2) It be adj. of sb. to do sth. 此处adj. 通常为描述人的形容词：kind, unkind, nice, rude, cruel, considerate, thoughtful, thoughtless, careful, careless, silly, foolish, stupid, clever, wise, crazy. 例It's kind of you to help me with the problem. (3) It替代作主语的动名词的常见句型 It's no good/use doing… It's (well)worth doing… It's (well)worth one's while doing/to do… It's (well)worth while doing/ to do 例It's no use crying over spilt milk. 2. It替代作主语的从句常见句型 (1) It is + noun +从句 例It is no secret that the president wants to have a second term at office. (2) It is adj. +clause It's surprising that…(should)………竟然…… It's a pity/shame that…(should)………竟然…… 例It's important that you should apologize to her for your rudeness.(=It's of much importance that you should apologize to her for your rudeness.) (3) It verb sb. + clause= It is v-ing + clause It+surprise/delight/interest/disappoint/worry/disturb/annoy/amaze /bother/concern/frighten/please/anger sb. that… 例It worried me that she drove so fast.(= It was worrying that she drove so fast.) (4) It verb (to sb.) that…= sb/sth verb to do (verb = appear, seem, come about, emerge, follow, chance, happen, occur, transpire, turn out , work out) 例It (so) happened/chanced that they were out.(= They happened/chanced to be out.) (5) It is v-ed that…=sb/sth is to do (verb=say, report, think, believe, hope, expect, agree, accept, decide, determine, intend, plan, understand, know） 例It is said that the couple have gotten divorced.(=The couple are said to have gotten divorced.) (6) It is v-ed that … (should)… (verb=demand, request, require, order, suggest, advise, recommend 例It is suggested that they should begin with the third question. 三、It作主语的句型 1. It takes sb. …to do…(=sb takes…to do…)某人用多长时间做某事 例It took the men a week to mend our roof.(= The men took a week to mend our roof.) 2. It's (just)(un)like sb. to do…（不）像某人做某事的风格 例It was (just) like him to think of helping us.
I t的用法总结文档编制序号：[KKIDT-LLE0828-LLETD298-POI08]
It 的用法总结 一. 代词: 1)指代上文 2)指代this/that 3)指代未知性别的婴儿或孩子或身份不明的人 4）指代时间/地点/天气/温度/距离/环境 gets dark very early in the winter. will you call it if it’s a boy love spring---It’s a wonderful time of the year. ’s less than 100 kilometres from here to Jinan. the factory closes, it will mean 500 people losing their jobs. ’s this It’s a cat. has snowed much this year. (1)The book in your bag is very interesting. Can I borrow (2) The book in your bag is more interesting than ______ on the desk. (3) The weather here is much colder than____ in Nanjing. (4) The books are free. You can take____ free of charge. (5) The books in the bag are better than _____ on the desk.
“It”用法及其句型和固定搭配讲解 "It" 用法及其句型和固定搭配，是高中英语语法的重点、难点，又是近几年高考的热点，因此应给予充分的重视，现将it用法归纳如下： 一、It用作实词 表达以下概念:指代前文提到的事物，前文中的this, that;替代前文中的内容;指代一位性别不明的小孩或未知的人;指代未指明但谈话双方都知道的那件事;指代时间、天气、气候、距离等自然现象…… 二、It用作形式主语 替代作主语的从句、动词不定式、动名词，而把真正作主语的从句、动词不定式、动名词置于句尾。 It 作形式主语的常见句型： 1. 代作主语的动词不定式，其句型为 (1) It be adj. (for sb.) to do sth. 此处adj. 通常为描述事件的形容词：easy, difficult, hard, necessary, unnecessary, possible, impossible, likely, unlikely, right, wrong, important, unimportant, legal, illegal, well-mannered, ill-mannered, polite, impolite, clear, obvious, certain, suitable, proper, fit, useful, useless, dangerous… 例It is illegal (for a teenager) to drive a car without a license. (2) It be adj. of sb. to do sth. 此处adj. 通常为描述人的形容词：kind, unkind, nice, rude, cruel, considerate, thoughtful, thoughtless, careful, careless, silly, foolish, stupid, clever, wise, crazy. 例It's kind of you to help me with the problem. (3) It替代作主语的动名词的常见句型 It's no good/use doing… It's (well)worth doing… It's (well)worth one's while doing/to do… It's (well)worth while doing/ to do 例It's no use crying over spilt milk. 2. It替代作主语的从句常见句型 (1) It is + noun +从句 例It is no secret that the president wants to have a second term at office. (2) It is adj. +clause It's surp rising that… (should)………竟然…… It's a pity/shame that…(should)………竟然…… 例It's important that you should apologize to her for your rudeness.(=It's of much importance that you should apologize to her for your rudeness.) (3) It verb sb. + clause= It is v-ing + clause It+surprise/delight/interest/disappoint/worry/disturb/annoy/amaze /bother/concern/frighten/please/anger sb. that… 例It worried me that she drove so fast.(= It was worrying that she drove so fast.) (4) It verb (to sb.) that…= sb/sth verb to do (verb = appear, seem, come about, emerge, follow, chance, happen, occur, transpire, turn out , work out) 例It (so) happened/chanced that they were out.(= They happened/chanced to be out.)