高中英语语法It的用法讲解与练习1

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高中英语牛津上海版高中一年级第一学期it用法讲解及练习(有答案)

高一it用法讲解及练习专项练习1.I like _______ in the autumn when the weather is clear and bright.A. thisB. thatC. itD. one2.—Shall we meet next week?—OK. We just make________ next Friday.A. oneB. itC. thatD. soA. whenB. thatC. sinceD. until4.It _______ to accomplish the return journey.A. coast us 15 daysB. spent 15days for usC. was 15 daysD. took us 15 days5. _______ from Beijing to London!A. How long way it isB. What long way is itC. How long way is itD. What a long way it is6. ________ i s reported in the newspaper, talks between the countries are making progress.A. ItB. AsC. ThatD. What7. ________ i s known to all that China is rich in natural resources.A. ItB. ThatC. WhatD. As8. _______ quite a few techniques to learn language well.A. It seems to haveB. There seem to beC. There seems to haveD. It seems to beA. who is heB. who he isC. who is itD. who itisA. thatB. whenC. beforeD. since11. _______ t hat I was watching TV when he came to see me.A. It happenedB. What happenedC. That happenedD. It was happened12.The chairman thought necessary to invite Professor Smith to speak at the meeting.A. thatB. itC. thisD. him13.The Foreign Minister said, " ________ our hope that the two sides will work towards peace."A. This isB. There isC. That isD. It is14. ________ i s reported in the newspaper that the terrible flood has caused a loss of 10 million yuan.A. ItB. ThisC. ThatD. AsA. decidingB. to decideC. of decidingD. decide16.Was________ that I saw last night at the corner?A. it youB. not youC. youD. thatyourselfA. whenB. beforeC. sinceD. that18. _______ t urn is_______ to clean the blackboard?A. Which... itB. Whose... itC. Which... thatD.Whose. .. that19.The seriously injured man has stopped breathing. will be no possibility of making him come to life.A. ItB. ThereC. ThatD. ThisA. it possibleB. it wasC. that being possibleD.possibleA. a ruleB. it a ruleC. a rule thatD. arule it is22.He moved to a new flat because is only five minutes' walk from the new flat to his office.A. itB. thisC. thatD. thereA. for... beforeB. not for... thatC. for... whenD. notfor... thenA. with whichB. thatC. whichD. whatA. to pick upB. of picking upC. to pickD.picking upA. learnedB. learnC. will learnD.would learnA. hasB. could haveC. haveD. hadA. sinceB. untilC. whenD.before29. ________ the 1500's _________ the first European explored the coast of California.A. It is not until... thenB. It was until... thatC. It's not until... whenD. It was not until... that30.I just wonder _________ that made them so depressed.A. why it didB. what they didC. how it wasD. whatit wasA. when... thatB. that... thatC. that... whenD.when... which32. _______ , they all went to the lake to swim.A. It was a hot dayB. Being a hot dayC. It being hotD. For it was a hot dayA. itB. thatC. thisD.which34.—_________ seems to be something wrong with the machine.—Yes,_______ got a lot of noise.A. It... it'sB. There... it'sC. I t... there'sD.There... there's35. _________ a certain doubt among the workers as to the necessity of the work.A. There areB. There isC. They areD. It isA. oneB. onceC. itD. herA. everythingB. itC. thatD.yourselfA. It is... There isB. There is... It isC. There is... There isD. It is...It isA. which... itB. that... itC. which... thatD. that...that40. ________ easy to do the repair. All you need is a hammer and some nails.A. You areB. That isC. There isD. It is Keys:1-5 CBCDD6-10 BABDB 11-15 ABDAB 16-20 ABDBD 21-25 BABBA26-30 ACDDD 31-35 DCABB 36-40 CBABD。

高中英语语法——It的用法

高中英语It的用法一、代词It1.用作人称代词，代替上文出现的同一个事物，既可以指代可数名词，也可以指代不可数名词, 其复数形式是them。

如：---Have you seen my pen? ---Yes, it’s in the desk.★ it可以指人，多指婴儿或指身份不明的人（通常是只闻其声，不见其人时）。

例如: ---Who is knocking at the door? ---It must be Tom.★ it与one和that的区别：one指代单数可数名词，泛指同类事物中的一个；其复数形式是ones，泛指一些。

如：I prefer a flat in east district to one in west district.that用来替代前面提到的特指事物，既可以指代单数可数名词，也可以指代不可数名词。

代替单数可数名词可以用the one替代。

其复数形式是those,指代复数名词，表特指。

如：The weather here is not so good as that there.The days in summer are longer than those in winter.2. it用以代替指示代词this和thatA：Whose umbrella is that?B：It’s Mary’s.3. it用作非人称代词，表示时间、日期、地点、天气、温度、距离、环境等。

It’s a beautiful day.It’s time for the meeting.课堂练习1. Tom's mother kept telling him that he should work harder, but ____didn't help.A. heB. whichC. sheD. it2. We’ve been looking at the houses but haven’t found ____ we like yet.A. oneB. onesC. itD. them3. The Parkers bought a new house but ____ will need a lot of work before they can move in.A. theyB. itC. oneD. which4. I was disappointed with the film. I had expected ________to be much better.A. thatB. thisC. oneD. it5. ---Do you like ___ here?---Oh, yes. The air, the weather, the way of life. Everything is so nice.A. thisB. theseC. thatD. it6. We need a new cupboard for the kitchen. So Peter made ____ from some wood we had.A. itB. oneC. himselfD. another答案：DABDDB二、引导词it1. it用作形式主语It is uncertain whether he can come to Jenny’s birthday party or not.It’s a pity that you missed the exciting football match.It remains a question whether he will come or not.It is reported that 16 people were killed in the earthquake.It happened that I was out when he called.It’s necessary for the young to master two foreign language.It is no use arguing about the matter with him.2. it用作形式宾语动词+形式宾语+宾语补足语+真正的宾语。

it的用法讲解及练习

“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) worthwhile 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. +clauseIt'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 + clauseIt+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.3. It's (about/high) time that…should /v-ed…是该做某事的时候了例It's(about/high) time that we should take action.4. It's the x-th time (that) …have v-ed…第几次做某事了例It's the third time that he has failed the driving test.5. It is/has been…since …continuous v-ed(延续性动词) 某动作已有多长时间不发生了例It's 10 years that he lived here6. It was(not)…before…过(不)了多长时间某动作发生了例It was not long before they arrived.四、It 作形式宾语用来替代作宾语的从句、动词不定式、动名词，而把真正作宾语的从句、动词不定式、动名词置于句尾。

高中英语It用法及其句型和固定搭配讲解

高中英语It用法及其句型和固定搭配讲解小编为大家准备了这篇高中英语It用法及其句型和固定搭配，帮助大家对it有更多了解。

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高中英语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 atoffice.(2) It is adj. +clauseIt'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 yourrudeness.(=It's of much importance that you should apologize to her for your rudeness.)(3) It verb sb. + clause= It is v-ing + clauseIt+surprise/delight/interest/disappoint/worry/disturb/ann oy/amaze/bother/concern/frighten/please/anger sb. that…例It worried me that she drove so fast.(= It was worrying that shedrove 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.)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 tomend 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.3.It's (about/high) time that…should /v-ed…是该做某事的时候了例It's(about/high) time that we should take action.4.It's the x-th time (that) …have v-ed…第几次做某事了例It's the third time that he has failed the driving test.5.It is/has been…since …continuous v-ed(延续性动词) 某动作已有多长时间不发生了6.It was(not)…before…过(不)了多长时间某动作发生了四、It 作形式宾语用来替代作宾语的从句、动词不定式、动名词，而把真正作宾语的从句、动词不定式、动名词置于句尾。

中学英语语法讲义：it用法

中学英语语法讲义：it用法一、概说it 看似简单，但用法却并不简单。

它不仅可以指人也可以指物，不仅可以指时间和距离也可指自然现象和自然环境，不仅可用作形式主语也可用作形式宾语，等。

现将其主要用法分述如下。

二、用作人称代词1. 用于指事物it用作人称代词最基本的用法就是代替前面已提到过的事物，以避免重复：This is my watch, it’s a Swiss one. 这是我的手表，它是瑞士制的。

I cannot find my watch; I must have lost it. 我找不到手表，我一定把它给丢了。

2. 用于指动物或婴儿除用于指代事物外，还可指动物或性别不详的婴儿：“Where is the cat?”“It’s under the bed.”“猫在哪儿?”“在床下。

”They got a baby and it was very lovely. 他们生了个孩子，很可爱。

3. 用于上文提到的情况He smokes in bed and I don’t like it. 他在床上抽烟，我不喜欢他这样。

Her mother kept telling her not to go out at night, but it didn’t help. 她母亲老叫她晚上不要出去，但是没用。

4. 用于指人it用于指人主要用确定未知人的身份：“Who is it?”“It’s me.”“是谁啊?”“是我。

”“Listen. Someone is crying.”“Oh, it must be Mary.”“听，有人在哭。

”“噢，一定是玛丽。

”Someone must have been here. But we have no idea who it was. 一定有人来过，但我们不知道是谁。

5. 指人时与he和she的区别当it用于指人时，主要用于确定未知的或者是身份不明的人，若是指已知的或身份明确的人，则应根据情况使用he或she。

[精]超详细的It的用法归纳总结(附习题及答案)

超详细的It的用法归纳总结（附习题及答案）一、It是代词指除人以外的一切生物和事物，用来指代时间、季节、天气距离、环境。

在这里，i是一个虚词，没有任何实际意义。

例如:①It is a quarter to eight now.现在是八点差一刻。

②It is midnight. 现在是午夜。

③It is time for breakfast.现在是吃早饭的时间。

④-What is the date today?今天几月几号?--It is December 3rd. 十二月三号。

⑤--What season is it?现在是什么季节?--It is summer. 夏季。

⑥--What is the weather like today?今天天气如何?--It is fine.天气很好。

--It is foggy and wet.天气多雾又潮湿。

⑧How far is it from the bus station to your home? 从汽车站到你们家有多远?⑨It is around five miles to the shopping center.从这儿到购物中心大约有五英里。

二、It用作主语用来指代文中出现过的人或事。

it此时可用来代替一个名词，一个短语，一个从句或一个句子。

在句中可指生物,非生物，不明性别的人，也可以指一个动作或件事情(人物型)，还可以指人或事物的身份(指示型)。

在这里,it是有实际意义的。

例如:①--What is this?这是什么?--It is a computer.这是一台计算机。

②--What is that?那是什么?--It is a map.那是一张地图。

③--Where is the dog?狗在哪儿?--It is lying under the tree.它在树下面躺着呢。

④--Where is the post office?邮局在哪儿?--It is near the hospital 在小医院附近。

高中英语语法It的用法讲解与练习

It的用法It的用法在高考中也是重现率较高的语言点，尤其是it用于强调句。

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。

一、要点点拔1．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．2．用于表达天气、环境、时间、距离、季节等。

例如：1) It’s half an hour’s walk from here to our school．2) It‘s nice and warm here．3) But it's two o'clock now, and it's time for us to go to school．3．用作形式主语.it 没有具体意义，而只是帮助把真正的主语移至句子后尾，使句子显得平稳一些，能借it 给移至句子后尾的主语有三种：一种由不定式表示，一种由动名词表示，一种由从句表示。

1).It 替代真正的主语——动词不定式短语.It is easier to say than to do .It is a good act to help the others.2).it 替代真正的主语——动名词短语,以动名词短语做主语的句子，主要在以no good, no use, no harm, dangerous, foolish 等词作表语的句中.It’s no harm drinking running water in that area。

It’s foolish talking like that.3).it 替代从句作主语，用从句做主语的带it 的句子很多,常见的有下面几类：①It is a pity (a shame ,a fact ,a wonder ,a good thing, etc. ) that…It is a shame that he didn’t pass the exam.②It is strange ( surprising, obvious ,true, good, possible, clear, etc. ) that…。

(完整版)“It”用法及句型讲解与习题汇总,推荐文档

“It”用法及其句型和固定搭配讲解一、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. +clauseIt'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 + clauseIt+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.3. It's (about/high) time that… should /v-ed…是该做某事的时候了例It's(about/high) time that we should take action.4. It's the x-th time (that) … have v-ed…第几次做某事了例It's the third time that he has failed the driving test.5. It is/has been… since …continuous v-ed(延续性动词) 某动作已有多长时间不发生了例It's 10 years that he lived here6. It was(not)… before…过(不)了多长时间某动作发生了例It was not long before they arrived.四、It 作形式宾语用来替代作宾语的从句、动词不定式、动名词，而把真正作宾语的从句、动词不定式、动名词置于句尾。

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It的用法It的用法在高考中也是重现率较高的语言点，尤其是it用于强调句。

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。

一、要点点拔1．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．2．用于表达天气、环境、时间、距离、季节等。

It’s foolish talking like that.3).it 替代从句作主语，用从句做主语的带it 的句子很多,常见的有下面几类：① It is a pity (a shame ,a fact ,a wonder ,a good thing, etc. ) that…It is a shame that he didn’t pass the exam.② It is strange ( surprising, obvious ,true, good, possible, clear, etc. ) that… 。

It was clear that they had no desire for peace.③ It seems (happened ,turned out, etc.)that…It seemed that things were not as they expected.④ It is said ( decided ,expected ,etc)that …It is said that the tickets have been sold out .4.用作形式宾语。

当复合宾语中的宾语是不定式,－ing短语或从句往往用it作形式宾语,而将真正的宾语移至句末,句子重心后移。

1) We find it difficult to learn English well in such a short time．2) We think it no use crying over spilt milk．3) We made it clear when and where we were going to have the meeting．5．用于强调句型，即“It is/was＋被强调部分＋that/who/whom+其它”句型之中。

使用该句型有以下几点请注意：①强调句的谓语is或was永远用单数. It was yesterday that I met your father in the street．②不管被强调部分是哪种状语，只能用that连接，不得使用where、when等连词.It was in the street that I met your father yesterday．③被强调部分为人时，可用who(主格或宾格)和whom(宾格)代替that，用that也行。

1)It was your father that/whom /who I met in the street yesterday．2) It was I that/who met your father in the street yesterday．④强调句中也要注意主谓一致、人称一致和否定转移的问题。

1)It is they who are our friends．2) It was not until ten o'clock that we got home last night．⑤注意不要混淆强调句和其他从句。

It is was…that…为强调句标志，去掉后仍可组成一个完整的句子，只是没被强调,而其他从句一般不具备这一特征。

比较：1) It was ten o'clock when we got home last night．我们昨晚到家时已十点了。

2) It was at ten o'clock that we got home last night．我们昨晚是在十点到家的。

第一句不是强调句，when不可改为that,因为去掉it was和that后，只能组成“We got home ten o'clock last night．”这样一个不完整的句子；第二句是强调句，that不可改为when．二、常用句型及考点I. 形式主语型1. It is clear (obvious，true，possible，certain…) that…2. It is important (necessary，right，strange，natural…)that…掌握本句型，应该记住所列举的形容词，并且记住that后的从句应用虚拟语气(should+动词原形)，should可以省去。

3. It is no good (use) doing sth．4. It is a pity (a shame …) that…本句型中，that后的从句一般用虚拟语气(should十动词原形)，should可以省去。

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。

5. It is time (about time，high time) that…本句型中that后的从句应该用虚拟语气。

6. It is the first (second…)time that…7. It is said (reported，learned…．)that…8. It is suggested (ordered…) that…本句型中的过去分词应该是表示请求、建议、命令等的词，that后的从句要用虚拟语气(should十动词原形)，should可以省略。

常译为“据建议；有命令……”。

9. It happens (seems，appears) that…10. It takes sb…to do sth．11. It doesn’t matter whether…12. It is kind (of sb) to do sth．本句型中的不定式如果需要逻辑主语，则须要前置介词of，而句型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，honest，horrible，kind，lazy，modest，naughty, polite，rude，silly, stupid，wise，wrong等。

13. It is necessary ( for sb) to do sth．14. It is (just) like sb to do sth．本句型为“某人(恰恰)是……样子”。

用来表示赞扬或不满，若用否定式，则表示怀疑。

例：It's like him to leave the work to others．他就是这样的一个人，把工作推给别人。

15. It is up to sb to do sth．本句型表示“谊由某人做……”。

II．强调句型It is+ 被强调部分+that/who…本句型中被强调部分可以是主语、宾语或状语。

强调的主语如果是人，that可以由who换用。

III．其他句型1. It is…since…本句型主句中用时间作表语，一般用现在时或完成时，since引导的从句常用瞬间动词的一般过去时态。

主句如用一般过去时，则从句用过去完成时。

2. It is…when…本句型中的when引导的是一个时间状语从句，主句中的it指时间，表语由具体的时间充当。

3. It looks (seems) as if．．．本句型中的as if引导一个状语从句，常译为“看起来好像……”。

如果与事实不相符合，则用虚拟语气．例1 It looks as if he is ill (真的病了) .例2 It looks as if he were ill (没有生病) .Exercises:一．单项选择1. It was at the gate ____ he told me the news.A. thatB. whatC. whichD. when2.Is ____necessary to tell his father everythingA. itB. thatC. whatD. he3.Was it in this palace ____ the last emperor died?A. thatB. in whichC. in whereD. which4. Is ____ possible to fly to the moon in a spaceship?A. nowB. manC. thatD. it5.Was it during the Second World War ____he died?A. thatB. whileC. in whichD. then6. Is ____necessary to complete the design before National Day?A. thisB. thatC. itD. he7.I don't think ____possible to master a foreign language without much memory work.A. thisB. thatC. itsD. it8.Does ____matter if he can't finish the job on time?A. thisB. thatC. heD. it9.It was not ____she took off her dark glasses ____ I realized she was a famous film star.A. when; thatB. until; thatC. until; whenD. when; then10. Tom‘s mother kept telling him that he should work harder, but ____didn’t help.A. heB. whichC. sheD. it11.____is a fact that English is being accepted as an international language.A. ThereB. ThisC. ThatD. It12. Is ________ possible to fly to the moon in a spaceship?A．now B．man C．that D．it13．Our food and service are better than ________ used to be.A．it B．we C．they D．them14．________ appears to me ________ the report must be truth.A．That; it B．It; that C．It; it D．That; that15．He feels ________ duty to help others.A．that he B．that his C．it he D．it his16．Take ________ easy. The roads are icy.A．it B．them C．us D．you17．The TV sets made in China are much better than ________ in Japan.A．that B．those C．them D．It18．—— Have you found the bike you lost yesterday?—— Yes, I've found ________ already.A．it B．that C．the one D．that one19.—— I'm looking for a flat.—— Would you like ____ with ____ garden?A．it; the B．it; a C．one; a D．one; the20．________ was ________ who I met in the museum this morning.A．It; him B．It; he C．That; he D. That; him21．It was in the rice fields ________ we had our League meeting.A．where B．that C．in which D．on which22．________ you come to the party so late?A．Why is it B．Why it is C．Why it is that D．Why is it that23．—— Were all three people in the car injured in the accident—— No, ___ only the two passengers ___ got hurt．A．they were; that B．there was; that C．it was; who D．there are; who 24．I don' t think ________ possible to master a foreign language without much memory work .A．this B．that C．its D．it25．It was not ________ she took off her glasses ________ I realized she was a famous film star．A. when; thatB. until; thatC. until; whenD. when; then26.It was not until 1920 ____ regular radio broadcasts began.A．while B．which C．that D．since27．________ is a fact that English is being accepted as an international language.A．There B．This C．That D．It28．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．when29．It was only when I reread his poems recently ____ I began to appreciate their beauty. A．until B．that C．then D．So30．I hate ______ when people talk with their mouths full.A．it B．that C．these D．them31．—— Why don't we take a little break? —— Didn't we just have ________ ?A．it B．that C．one D．this32.Was it during the Second World War ____ he died？(MET88)A．that　B．While C．in which D．Then33.Is ____ possible to fly to the moon in a spaceship？(MET88)A．now　B．that　C．it　D．Man34.I don't think ___ possible to master a foreign language without much memory work．(MET90) A．This B．that C．its D．It35.___ is a fact that English is being accepted as an international language．(NMET95) A．There B．This C．That　D．It36. It was about 600 years ago ___ the first clock with face and an hour hand was made.(NMET97) A．that B．until C．before　D．when37.____computers play such an important part in our daily life?A．Why it is that B．Why is it that C．Why was it that D．Why is it38. Was it during the Second World War _____he died?A. thatB. whileC. in whichD. then39. Is ____ necessary to take off our shoes when we enter the lab?A. everyoneB. thisC. herD. it40. Is ____ possible to fly to the moon in a spaceship?A. nowB. thatC. itD. man41. I don’t think ___ possible to master a foreign language without much memory work.A. thisB. thatC. itsD. it42. She heard of a terrible noise, ___ brought her heart into her mouth.A. itB. whichC. thisD. that43. Alice received an invitation from her boss, ____ came as a surprise.A. itB. thatC. whichD. he44. Does ____ matter if he can’t finish the job on time?A. thisB. thatC. heD. it45.Tom’s mother kept telling him that he should work harder, but ____ didn’t help.A. heB. whichC. sheD. it46. The weather turned out to be very good, ___ was more than we could expect.A. whatB. whichC. thatD. it47.____is a fact that English is being accepted as an international language.A. ThereB. ThisC. ThatD. It48. I hope there are enough glasses for each guest to have _____.A. itB. thoseC. themD. one49. It was about 600 years ago ___the first clock with a face and an hour hand was made.A. thatB. untilC. beforeD. when50. I hate ____ when people talk with their mouths full.A. itB. thatC. theseD. them51. It was only when I reread his poems recently____ I began to appreciate their beauty.A. untilB. thatC. thenD. so52. It is the ability to do the job ____ matters not where you come from or what you are.A. oneB. thatC. whatD. it53. It ____ you that ____ to blame.A. is; isB. is; areC. are; areD. are; is54. Was_____that I saw last night at the concert?A. it youB. not youC. youD. that you55.____ electricity plays such an important part in our life?A. Why is it thatB. Why is itC. Why it is thatD. Why is that56. It was ____ he said _____ disappointed me.A. what; whatB. that; thatC. what; thatD. that; what57. It was in the lab ___ was taken charge of by Professor Harris ___ they did the experiment.A. which; thatB. that; whatC. whom; thatD. which; where58.Many people now make a rule to buy cards for their friends before Christmas.A. themselvesB. itC. thatD. this59.Someone is at the door, who is ?A. thisB. thatC. itD. he60.—It is raining cats and dogs.　— .A. So it isB. So is itC. Neither it isD. Neither is it二.分析it成分，辨清相似句型。