高中英语语法权威解析二---“It”用法及其句型和固定搭配讲解(附练习题)

高中英语语法知识之It的用法总结第一篇：高中英语语法知识之It的用法总结高考英语语法知识之It 的用法总结1．It is + 被强调部分 + that...该句型是强调句型。

将被强调的部分放在前面，其它部分置于that之后。

被强调部分可以是主语，宾语，状语。

强调的主语如果是人，that可以由who换用。

如果把这种句型结构划掉后，应该是一个完整无缺的句子。

这也是判断强调句型与其它从句的方法。

It was they that(who)cleaned the classroom yesterday.It was in the street that I met her father.2．It was not until + 被强调部分+ that...该句型也是强调句型。

主要用于强凋时间状语，译成汉语＂直到．．．才．．．＂，可以说是 not...until...的强调形式。

It was not until she took off her dark glasses that I realized she was a famous film star.= Not until she took off her dark glasses did I realize she was a famous film star.= I didn’t realize she was a famous film star until she took off her dark glasses.3．It is clear(obvious, true, possible,certain....)that.....该句型中it 是形式主语，真正的主语是that 引导的主语从句，常译为＂清楚（显然，真的，肯定．．．）＂是主语从句最常见的一种结构。

It is very clear that he’s round and tall like a tree.= That he’s round and tall like a tree is very clear.4.It is important(necessary, right, strange, natural...)that...由于主句中的形容词不同，that 后的从句中要用虚拟语气（should + 动词原形），should 可以省去。

“it” 两项重点用法Mar 4. 2011 这两项重点用法指的是强调句和it做形式成分。

一.强调句:一）陈述句：It + is / was + 被强调部分+ that / who … ( 强调人时可用who )I met Tom in the street yesterday.针对各个划线部分变强调句：1) It was I that met Tom in the street yesterday.2) It was Tom that I met in the street yesterday.3) It was in the street that I met Tom yesterday.4) It was yesterday that I met Tom in the street.二）一般疑问句：1) Was it I that met Tom in the street yesterday?2) Was it Tom that I met in the street yesterday?3) Was it in the street that I met Tom yesterday?4) Was it yesterday that I met Tom in the street?三）特殊疑问句：1) Who was it that met Tom in the street yesterday?2) Who was it that I met in the street yesterday?3) Where was it that I met Tom yesterday?4) When was it that I met Tom in the street?四）特殊疑问句作宾语从句：I forgot…1) I forgot who it was that met Tom in the street yesterday.2) I forgot who it was that I met in the street yesterday.3) I forgot where it was that I met Tom yesterday.4) I forgot when it was that I met Tom in the street.结论：特殊疑问句作宾语从句时，主谓词序正常。

“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 bｅadj．(fｏr ｓb.)ｔo dｏｓth．此处adj. 通常为描述事件的形容词：easy，ｄiffｉcult，hard，nｅcessaｒy,ｕnnecｅssa ｒｙ,possible，iｍpossible，liｋely，ｕnliｋｅly,riｇｈｔ，wrong，ｉmportant,uｎｉｍpoｒt ａnt，leｇal,illegal，wｅll-maｎｎerｅd,ill－manｎｅｒｅd,ｐolite,impolite，clｅar,obviｏu ｓ,cｅrｔaｉｎ,ｓuｉｔａble，ｐropeｒ，fiｔ，uｓefuｌ,useｌｅsｓ,ｄanｇeroｕｓ…例Iｔis iｌlegａl(ｆｏrａｔeｅnagｅｒ）to dｒiveａcａr withoｕt a licens ｅ.(2）It be adｊ．oｆsb. toｄo 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＇ｓkiｎdｏf yｏｕto help me wiｔｈｔhe proｂlｅm.（3)It替代作主语的动名词的常见句型It'ｓnｏｇｏod／usｅdｏinｇ…Ｉｔ＇ｓ（welｌ）wortｈdoｉng…It＇s（well）worth oｎe＇ｓwhilｅdoing/to do…Iｔ's（weｌl）ｗorth while doiｎg/ to do例Ｉt＇s no usｅcryｉngｏvｅr ｓpilt milk.2. Iｔ替代作主语的从句常见句型（1）It is ＋nouｎ+从句例Iｔis ｎo ｓｅcret thaｔtｈｅpresidentｗants ｔo hａve ａｓecond ｔerm at office．（2）It is adj. +cｌauseＩt'ｓsｕrprisｉnｇtｈat…(ｓhould）………竟然……It＇s a piｔy/ｓhame tｈat…(sｈould）………竟然……例It＇s importaｎt thａｔyｏu ｓｈoｕld apoｌoｇiｚe tｏher foｒyouｒrudeｎess.(=It's ｏf mｕch ｉmｐｏｒtａnｃｅthat yｏｕshｏｕld apｏlogｉze to ｈer for yoｕr rｕdeｎess．)（3）Iｔｖerｂsb. + claｕse= It ｉs v-ｉng + ｃlauｓeIｔ+suｒpｒｉse/ｄeliｇht/inteｒｅst/ｄｉsaｐpoiｎｔ/ｗoｒry/diｓturｂ/ａｎnoy/amaze /ｂother/ｃonｃｅrn/ｆｒｉghten/pｌeａse/anger ｓb. ｔhat…例Iｔwｏrried mｅthaｔshe ｄroｖe ｓｏfast.(＝Iｔｗas wｏrｒｙing that ｓhe dｒovｅso fasｔ.）（4）Iｔverb（ｔo sｂ.)tｈａt…= sb／stｈverb tｏdo（vｅｒｂ＝ａpｐeａr,seeｍ,ｃome about，emerge，ｆｏｌｌｏw,chance,hａppen，oｃｃur,transpire,turn ouｔ,ｗork ouｔ)例Ｉt(so）ｈappeneｄ/chanced thａt tｈey werｅoｕt.(＝Tｈｅｙhapｐened/c ｈanceｄto ｂe ｏut.）（5)It is v-ed that…=sb/ｓtｈｉs to do(verb=say,report，tｈinｋ,belieｖe,hope，exｐｅcｔ,agree，acｃept，deｃidｅ，dｅtｅrmine，intenｄ，ｐｌan,unｄerstａnd,ｋｎow)例It is said that the couple hａvｅgottｅｎｄivorcｅd.(＝Thｅcｏupｌe aｒe said to have goｔten ｄivorced.）（６)Ｉt ｉｓv－eｄthat …（ｓhouｌｄ)…(verｂ＝deｍand，ｒeｑuest,reｑuｉｒe,oｒdｅｒ,sｕｇｇｅsｔ,ａｄvise，rｅｃoｍmｅｎd例It is suggeｓted tｈａt tｈｅy should begｉn with the tｈirdｑuｅｓｔion. “It”用法及其句型和固定搭配讲解2007-0５-０１17:１4：０5.０中国高中生网()三、Ｉt作主语的句型1．It tａkｅs sb.…tｏdo…（=sb ｔａkes…tｏｄo…）某人用多长时间做某事例It took tｈe meｎａweｅk ｔo menｄour roof．（= Tｈe men toｏk a ｗeek t ｏmｅnｄoｕｒroof.）2. It's（ｊuｓt）(uｎ）lｉke sb．to dｏ…（不）像某人做某事的风格例Ｉｔｗas(juｓt)lｉｋe ｈimｔo 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)tｉmｅthat we shouｌｄtａke ａｃtｉon.４．Iｔ'sｔhe x－th timｅ（ｔhat)…have v－ed…第几次做某事了例Iｔ's the third tiｍe thaｔhe ｈas faｉledｔｈe ｄrｉvｉnｇｔest.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 lｉveｄheｒe６.It ｗas(noｔ）…befoｒe…过(不)了多长时间某动作发生了例It was noｔlong 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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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。

高考英语It的用法It是高考英语中一个极其重要的词，其用法多样，在不同的语境中具有不同的意义。

下面我们将从it的用法、句型和固定搭配三个方面进行讲解。

一、it用作实词1、表示时间、天气、距离、温度等自然现象。

例如：It is Monday today.今天是星期一。

It is raining outside.外面正在下雨。

It is 5 kilometers away from here.距离这儿有5公里远。

2、表示观点、看法、态度等主观想法。

例如：I think it is a good idea.我认为这是一个好主意。

We think it is important to learn English well.我们认为学好英语很重要。

二、it用作形式主语当不定式、动名词或从句作主语时，为了保持句子结构平衡，避免头重脚轻，常用it作形式主语，代替不定式、动名词或从句，而把真正的主语放在句尾。

例如：It is important to learn English well.学好英语很重要。

It took me an hour to finish the homework.我花了一个小时完成作业。

三、it用作形式宾语当不定式、动名词或从句作宾语时，为了保持句子结构平衡，避免头重脚轻，常用it作形式宾语，代替不定式、动名词或从句，而把真正的宾语放在句尾。

例如：I think it is important to learn English well.我认为学好英语很重要。

He found it hard to learn English well.他发现学好英语很难。

四、it用于强调句型中强调句型是英语中一个重要的句型，用于突出强调某个成分，特别是主语、宾语和状语等。

在强调句型中，it没有实际意义，只是起到引导作用。

例如：It is I who am the best student in my class.我是班里最好的学生。

It 的用法It 可用作实词（代词）和虚词（助词）。

实词it 指用于人称和前指（指刚提到的人或物），用于无人称时，做主语，表示时间，距离，天气等。

虚词it 可用作形式主语或形式宾语，也用于构成的强调句型。

（一）实词（代词）1. 用作人称代词1）指人。

例如：Who is it? Is it you, Andrew ?Who is making such a noise ? It must be the children.2）用作前指，代替前文提到过的人或事物。

例如：What a beautiful baby ! Is it a boy ?You have saved my life; I shall never forget it.3 ）代替指示代词this, that。

例如：“What's this ?” “It'sa flag.”4 ）代替一个双方既知所指的东西How 'sit going with you ?2. 用作非人称代词常用作没有具体意义的主语，表示气候，天气，温度，时间，地点，距离等。

例如：1）指天气：It 'sdamp and cold. I think it 's going to rain.2）指时间，季节等：“ what time is it ? ” “It is eight o 'clock. ”I hope it is spring all the year round.3）指距离It is five kilometers from the office to my home.4）指环境，条件等It was very quiet and peaceful here,It was becoming increasing dangerous.5）“无人称it ”也用于表达下列2 个结构表达印象和可能性：It seems as if we've known each other for years, （印象）It looks as though I 'm going to fail the test6）“无人称it ”还用于下列的表达中as it is事实上So be it但愿如此，好吧That' s it !对，是这样！make it到达，成功（二）虚词（助词）1. 作形式主语当动词不定式，动名词，或从句做主语时，通常把她们放在谓语后，而用it 做形式主语。

高考英语中it用法浅析“it”用法及其句型和固定搭配是高中英语语法的重点和难点，也是近几年高考的热点。

它的用法极其广泛、灵活，既可以作人称代词，也可以作非人称代词；既可以充当形式主语和形式宾语，也可以用于强调结构中，构成强调句；它还常常用在某些动词或特殊词类之后，构成习惯用语。

下面就其在高中英语中的使用重点及难点通过例句加以总结：1.作人称代词1）指人，主要用来确定未知人的身份，也可以指性别不详的婴儿。

---Who is it? ---It’s me.---谁呀？---是我。

It’s a lovely baby. Is it a boy or a girl?是个可爱的婴儿，男孩还是女孩？2）指除了人以外的一切动物和事物，是第三人称单数（中性）。

It’s a pet dog. 它是只宠物狗。

I love swimming. It keeps me fit.我喜欢游泳，它让我保持健康。

3）表示推断(不管个数有多少)--- Who is making such a noise? --- It must be children.---谁这么吵？---一定是孩子们。

4）代替指示代词和不定代词Nothing is wrong, isn’t it? 没出什么问题，是吗？1.用作非人称代词，表示时间、天气、气候、距离、温度、地点、金钱等，在句中做主语。

It is six miles to the nearest hospital from here. 从这儿到最近的医院有6英里。

3.充当形式主语，本身无意义，只起一种先行引导的作用，后面的真正主语通常是不定式结构、-ing分词结构、或名词性从句。

1）典型句型：It be(is\was\will be )+ n.\adj.\participle + doingsth\ to do sth\that-clauseIt is difficult to translate this article.翻译这篇文章很难。