it在中学英语里的用法

it在中学英语里的用法

一、作人称代词，可用来代替人、物或事。—Who is knocking at the door?—It's me 谁在敲门?是我。(表示不知道是谁的时候，用it ,还有表示刚出生的婴儿也可以用it)

The ant is not gathering this food for itself alone. It has two stomachs in its body.蚂蚁不只是为自己采食。它的身体里有两个胃。

二、作非人称代词，表示时间、天气、季节、距离、环境等。

It is tea time. Mrs Tuner goes into the kitchen.到了喝茶的时间了，特纳夫人走进了厨房。

It was winter. it was ten degree below zero.现在是冬天，气温是零下10度。

It is only half an hour walk to the tall tower. 只有半小时的路程就可以到达高塔了。

It will be lovely in the park today.今天公园里一定很好玩。

三、作先行词。

1.作形式主语。英语中不定式、动名词、主语从句在作主语时主语往往显得很长，使整个句子看上去有点头重脚轻，这样就借助“it”来作形式上的主语，而把真正的主语移到句子后边去，使全句看上去平稳一些。“it”没有实际的意义。

It is fun for her to study, but it is difficult to study and work at the same time.对于她来说学习是有趣的，可是要边工作边学习对她来说是困难的。

It is necessary for them to get an electrician to do the work for them.对他们来说请一位电工来为他们做这项工作是必要的。

It will be no good learning without practice. 学习而不实践是不好的。

It is no use talking to him about it.和他谈这事没用。

It is possible that they're finished the bridge.他们完成这座桥是可能的。

It is important that we should learn from each other and help each other.我们应当互相学习，互相帮助，这是很重要的。

2.作形式宾语。这种情况通常只用于能带以名词或形容词作宾语补语的动词后面。

四、构成强调句型。为了强调句子的某一成分，把引导词“it”用在句首，这种强调句的结构是“It is (was )+所强调的成分(主语、宾语、状语)+that…”，表达的意思为“是…，正是…，就是…”。“it ”在这种句型中本身没什么实际意义。

强调句型使用十要素

It is/was +… who/that…

十要素分别举例说明：

1. 如强调句型指现在或未来的情况用It is指过去用It was。

e.g. It is I who/ that am wrong.

分析：被强调部分为人强调词可用who也可用that. 指现在的情况所以以 It is开头，被强调部分是 I谓语用“am”

原句： I am wrong.

e.g. It was him who\that I saw the day before yesterday.

原句为 I saw him the day before yesterday.

分析：指过去的情况用It was 开头，被强调部分为人所以强调词仍是who\that.

2. 被强调部分往往为句子的主语、宾语、时间状语、地点状语等，但有时也可以强调比较复杂的内容。如时间状语从句、地点状语从句、not until… 结构、not only…but also…和as well as…等结构。

e.g. It was only when I reread his poems recently that I began to appreciate their beauty. (appreciate means understand and enjoy the good qualities or value of something欣赏、鉴赏、领会)

分析：强调部分为复杂的时间状语从句强调词不能使用when只可用that

e.g.It is not only he but also his parents who\that have been to Beijing.

3. 被强调部分为人称代词时，原句用什么格强调句也用什么格。

如上述例句。

4. 关于强调词的选用，强调人时可用who 或that，如果不强调人一律用that。此时绝不能与定语从句混淆，被强调部分为时间状语、地点状语、或原因状语时不可误用when, where 或why。

e.g. It was in the street that I met him yesterday.

尽管被强调部分是地点状语，强调词不能使用where只可用that.

e.g. It was about 600 years ago that the first clock with a face and an hour hand was made.分析：指过去的情况用It was 开头，尽管被强调部分是时间状语，强调词不能使用when只可用that.

e.g. It was because he was ill that died at once

被强调部分为复杂的原因状语从句强调词不能使用why只可用that。

5. 被强调部分如果为主格人称代词，who\that后的动词和主格人称代词在人称和数上保持一致。 (如例一所示)

6. 强调句型的一般疑问句结构 Is\Was it… who\ that…?

e.g. Was it during the Second World War that he died?

分析：以Was it 开头被强调部分是时间状语，强调词用that。

7. 强调句型的特殊疑问句结构

特殊疑问词+is\was it… who\ that…?

强调句型的特殊疑问句是就特殊疑问词强调

Where was it that you found your lost pen?

原句：Where did you found your lost pen?

8.强调句型It is \was…who/ that中is\was前面可用much\may\might等表推测的情态动词修饰。

e.g. It might be in his room that he met her.

注意：如改成特殊疑问句由于may,must表推测的情态动词只用于肯定句，所以否定句，疑问句might 应改成could.

e.g. Where could it be that he met her?

9. 强调部分为时间状语和地点状语时有可能先接定语从句再接强调句型

e.g. It was on October 1st,1949 when he joined the Party that he was killed.

e.g. It was in the room where he had studied for three years that he hound his lost pen.

10. 判断强调句型的使用是否正确的方法是将强调部分去掉如去掉强调句型结构后句子仍正确，强调句型就正确。

(三)Ⅰ.单项填空

1.Carol said the work would be done by October, _____ personally I doubt very much.

A. it

B. that

C. when

D. which

2.-Why don't we take a little break? -Didn't we just have____?

A. it

B. one

C. that

D. this

3.I hate_____ when people talk with their mouths full.

A. it

B. that

C. these

D. them

4.______is well-known to all that Hong Kong has returned to China.

A. Which

B. It

C. That

D. As

5.-______has just come in? -It's Mr. Green, our headmaster.

A. Who is that

B. Who that is

C. Who's it that

D. Who it is

6._____that they may be invited.

A. They wished

B. It is hoped

C. That is expected

D. What they hope

7.The manager didn't feel like _____ whether he would attend the meeting the next morning.

A. making it clear

B. make that clear

C. to make it clear

D. making this clearing

8._____I was free that evening.

A. It happened to

B. It happened that

C. That happened

D. It was happened that

9.He said, "_____a long way to school. _____ a long way to go before we arrive."

A. It is; It is

B. There is; It is

C. It is; There is

D. There is; There is

10.Tom's mother kept telling him that he should work hard, but ______ didn't help.

A. he

B. which

C. she

D. it

11.They say that _____doesn't make any difference my being there.

A. there

B. that

C. it

D. he

12.I hope there are enough chairs for each guest to have_____.

A. it

B. one

C. those

D. them

13.We saw the hill, and _____used to be a factory.

A. in front of which, there

B. in front of it, it

C. at the foot of it, there

D. at the foot of which, it

14.Your idea is very good. Don't _____.

A. give up it

B. give it up

C. give in it

D. hasn't it

15.When they will start hasn't been decided yet,______?

A. will they

B. won't they

C. has it

D. hasn't it

(四)1. Was it during the Second World War_____ he died?

A. that

B. while

C. in which

D. then (88)

2. Is ____ necessary to complete the design before National Day?

A. this

B. that

C. it

D. he (89)

3. I don’t think ____ possible to master a foreign language without much memory work.

A. this

B. that

C. its

D. it (91)

4. Does ______ matter if he can’t finish the job on time?

A. this

B. that

C. he

D. it (91)

5. It was not _____ she took off her glasses _____ I realized she was a famous film star.

A. when, that

B. until, that

C. until, that

D. when, then (92)

6. I was disappointed with the film . I had expected ______ to be much better.

A. that

B. this

C. one

D. it (93)

7. It was not until 1920 ______ regular radio broadcasts began.

A. while

B. which

C. that

D. since (94)

8. ______is a fact that English is being accepted as an international language.

A. There

B. This

C. That

D. It (95)

9. It was only when I reread this poems recently _____ I began to appreciate their beauty.

A. until

B. that

C. then

D. so (97)

10. I hate _____when people talk with their mouths full.

A. it

B. that

C. these

D. them (98)

11. 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 (2000)

12. I’d appreciate _____ if you would turn the radio down.

A. that

B. it

C. this

D. you

不定代词,it用法

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英语中it的用法及练习 一、概述 在英语中，it的使用相当广泛，它既可用作代词，如人称代词（personal it）、指示代词（demonstrative it）及非人称代词（impersonal it）, 也可用作引导词（anticipatory it）和强调结构中的强调词（emphatic it） Someone is ringing the doorbell. Go and see who it is.有人在按门铃。去看看是谁。（人称代词）What’s this?这是什么？ It’s a book.这是一本书。（指示代词） What a long way it is from Beijing to London! 从北京到伦敦真远。（非人称代词） It's best to plant trees in spring because it's warmer.春天是植树的最佳时节，因为天气更暖和。（作引导词） It was I who met him in the park last week. 是我上星期在公园遇到他的。（强调结构中的强调词） 二、it作代词 1、用作人称代词（personal it） 代替前文提到过的事物，it作真实主语或宾语。 The frog is not a warm-blooded animal. It is a cold-blooded one.青蛙不是温血动物，它是冷血动物。 My pen is missing. I can't find it anywhere. 我的笔丢了，我哪儿也找不到它了。 I won't be back tonight. Please tell my wife about it .我今晚不回来了，请你向我妻子说一声。 I was disappointed with the film. I had expected it to be much better. 我对这部电影很失望，我曾盼望它更好。 Tom's mother kept telling him that he should work harder, but it didn't help.汤姆的妈妈不停地告诉他要努力，但这没起作用。 2、用作指示代词（demonstrative it） 相当于this或that，it有时不特指某件东西，而代表前面已提到的或将会发生的某件事情。 -Who is knocking at the door? —谁在敲门？ -It's me. —是我。 I had a talk with the student. It was very helpful to her. 我和那个学生谈了次话，对她非常有帮助。 It happened during my stay in the United States. 事情发生在我在美国的时候。 -Whose exercise book is that? —谁的作业本？ -It's his . —是他的。 3、用作非人称代词（impersonal it） 代词it可用来指除人以外的一切生物和事物，无阴阳性之分。可指时间、距离、度量、价值、自然现象（天气、气体、阴暗等）。 -What's the time? —“几点了？” -It's half past ten. —“十点半”（指时间） It is late autumn now. 现在是深秋。（指时间） It is rather cold today, isn't it?今天很冷，是不是？（指天气） -How far is it from here to the station? —从这儿到车站有多远？ -It's about two kilometers. -大约两公里。（指距离） It is raining hard. 雨下得很大。（指自然现象） -What's the cost of the dictionary? 那本词典多少钱？

it的用法和练习(带答案)

重点代词it的用法和练习（含答案） (1)it用做人称代词的用法 it用作代词，意为“它”，既可以指人，也可以指物。it做人称代词，可以用来代替一个名词、短语、从句或句子，以避免他们在句中的重复。这是可以指提到过的，也可以指未提到的，在句中做主语、表语和宾语。 1)指事物，it可以知道除人以外的任何事物或动物。 I dropped my watch and it broke.我把手表掉在地上摔坏了。 2)指人，it主用用于指性别不明的婴儿或只听其声不见其人的人，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. “Listen. Someone is crying..”“Oh, it must be Mary.” 3）代替某些代词。 代词it可以用于代替指示代词this, that以及复合不定代词something, anything, nothing等，如：“What’s this?”“It’s a new machine” (2)it用作非人称代词的用法 1)it用作非人称代词主要用来指时间、距离、价值、天气、气温及温度等自然现象。如 It’s too late to go there now.现在去那已经太迟了。 It rained all day yesterday.昨天下了一整天雨。 2)用于某些句型。 It’s time for sth. 该做某事了。 It’s to do sth. 是时候该做某事了。 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，有时候用should+动词原形） It’s first(second)time +that--从句。某人第几次干某事。（从句谓语动词用现在完成时） It’s +时间段+since从句。自从…以来有一段时间了。 It’s +时间段+before 从句。过多长时间才… (3)it用作形式主语的用法。 1)当不定式、动名词、从句等复杂成分做句子主语时，为保持句子的平衡，通常把真正的主语放 在句末，而句首使用形式主语it。如 It’s very important to remember this. It’s hard work climbing mountains. It’s unknown when he will come. 2)it用作形式主语的重要句型。 ①It+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，太愚蠢了。 提示：此句型中的介词of和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”。

初中it, one,that,those的用法

I. it／one ／that三者均可用作代词, 指代前面提到的名词。一般说来, it指代同名同物; one 与that则指代同名异物。 I have lost my umbrella; I'm looking for it. （该句中it就是指前面的my umbrella） I have lost my umbrella; I think I must buy one. （one在该句中表泛指, 因为my umbrella 已经丢了） The umbrella you bought is cheaper than that I bought. （替代词that在该句中特指“the umbrella I bought”, 以区别“the umbrella you bought”） II. one与that虽可用来指代同名异物, 但one为泛指, 相当于a／an＋名词; that为特指, 相当 于the ＋名词。所以one所指代的名词的修饰语一般为 a／an ／some ／any; that所指代的名词的修饰语往往是the ／this ／that。 A chair made of steel is stronger than one made of wood. （该句中one可以换成a chair） The water in the cup is hotter than that in the pot. （该句中that可以换成 the water） III. one只能代替可数名词单数, 代替可数名词复数时用ones; that既可以代替不可数名词也可以代替可数名词单数, 代替可数名词复数时用 those。 I like this pen more than that one. （one代替可数名词单数pen） There were a few young people and some older ones in the house. （ones代替可数名词复数people） Mary's handwriting is far better than that of Peter. （that代替不可数名词 handwriting） These pictures are more beautiful than those. （those代替可数名词复数 pictures） IV. one既可代替事物, 也可代替人, that只能代替事物而不能代替人。有时可以用the one或the ones代替that或those。 The one ／That on the table is mine. （该句中The one代替事物, 并且也可以用That） He is the teacher, the one who is loved by the students. （该句中the one代替人, 不能用that） He advised the farmers to choose the best seed-heads, the ones ／those that had the best color. （该句中the ones代替事物, 并且也可以用those）

高中英语It的用法专项练习题

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It在初中阶段的用法

It在初中阶段的用法 在初中英语教材中，出现了许多it的用法，现归纳如下 1、用作人称代词，代替前文提到过的事物。用于同名同物的场合。 My watch is missing. I can’t find it anywhere.(it=my watch) 2、代替指示代词that或this。 What’s this? It’s a computer. What’s that? It’s a pen. 3、用作非人称代词，表示时间、天气、距离、潮汐、自然环境等。It’s t ime for lunch. It was a raining day. How far is it from your office to the bank?It was very quiet in the library It will be lovely in the garden tonight. 4、用于指代性别不详的人或动物，有时指婴、幼儿。 --Who is it? 谁(敲门)啊? --It’s me , Lucy. Her new baby is tiny. It only weighs two kilos. 5、用作指示代词，指代前文已提到或后文将提到的事情。 You have saved my life; I’ll never forget it. The statesman was murdered last night. It was a terrible blow to the people. 6、用作引导词(即先行代词)，在句中作形式主语或形式宾语，代替后面的动词不定式短语、动名词短语、从句，或引导强调结构。 (1)代替动词不定式(短语)。 It is necessary for him to go there.(由for引出动词不定式的逻辑主语) It’s very good of you to have listened to me.(由of引出动词不定式的逻辑主语) Don’t you consider it better not to disturb him now? (2)代替动名词短语，作主语或宾语。 It’s no use talking to him about it. I found it necessary discussing the problem. .(3)代替由从属连词that引导，或由连接代词及连接副词引导的从句，在句中作主语或宾语。 It was evident that victory had returned. They want to make it clear to the public that they do an important and necessary job. (4)用在强调结构中，表示所强调的内容。 It is the people that (who) are really powerful. It was on Sunday night that all this happened. 典型考题 1.---This is my dog,Spotty. ---Oh,________is very lovely. A it B this C that 2.--- is very important that you told him 3.A it B this C that

It的用法及练习题

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