高中语法it的用法
英语语法：高中英语It的用法
【导语】"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，⽆忧考整理了“it的⽤法”，欢迎阅读参考！更多相关讯息请关注⽆忧考！⼀、It⽤作实词表达以下概念:指代前⽂提到的事物，如前⽂中的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（覆⽔难收）.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) 某动作持续了多长时间例: It's 10 years since 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。
高考英语语法总复习7it的用法课件
A. it
B. her
it作形式宾语
C. that
D. this
★it知识点补充★
it变化成形物代形式 注意区分its和it’s
it→its(它的)
it’s=it is
it和现三单 It sounds good.
it
it变化成反身代词 it→itself(它自己)
it变化成复数形式 it→they(他们 主格) it→them(他们 宾格)
注意: 某些动词(短语)后接从句时要用it作形式宾语，再接从句，构成“动词(短语)+it+that/if/when/...从句”，如： ①I hate/like it when... 我讨厌/喜欢... ②You should see to it that... 你应该确保... ③You can depend on it that... 你可以相信... ④I can’t help it if... 如果...我也没有办法 ⑤I would appreciate it if... 如果...我将感激不尽
★常用it作形式主语的句式★
(5)用于It is/was...that/who... 强调句中 1.It was they that/who cleaned the classroom yesterday.
昨天是他们打扫的教室。
2.They cleaned the classroom yesterday.
were using ___it___ every day.
此处作using的宾语，根 据语境可知，所填词指 代上文的railway，故填
it
(4)作形式主语或形式宾语，代替动名词、不定式或从句
2.I find it difficult to work with him.
高中英语语法之it 形式主语
It was suggested that the sports meet be put off until next Saturday. It is desired that we (should) get everything ready by tonight. It was ordered that the medicine be sent there by plane.
3）It is a pity (a shame, no wonder, better) that .... It is a pity that we didn't grasp that opportunity. It was a great pity that you (should) have made so many mistakes in your math exercise. It will be better that she stay with her grandmother.
it is very important that 7.好像他过几天就会回来。it sis a pity
that 9.大家都知道，要学好英语一定要多读多听多做练习。
it is well known that 10.那是我第一次到北京。it was the first time that 11.该是我们行动起来保护环境的时候了。it is high time
2）It is +v-ed +that 从句
It is said that Andy Lau will come to Guangzhou tomorrow.
It was reported that there were 300 people died of this disease.
高中英语语法总结--强调句、It的用法、省略和插入语
高中英语语法总结——强调句、It的用法、省略和插入语一、强调句（一）强调句句型1、陈述句的强调句型：It is/ was + 被强调部分（通常是主语、宾语或状语）+ that/ who（当强调主语且主语指人）+ 其它部分。
e.g. It was yesterday that he met Li Ping.2、一般疑问句的强调句型：同上，只是把is/ was提到it前面。
e.g. Was it yesterday that he met Li Ping?3、特殊疑问句的强调句型：被强调部分（通常是疑问代词或疑问副词）+ is/ was + it + that/ who + 其它部分？e.g. When and where was it that you were born?4、强调句例句：针对I met Li Ming at the railway station yesterday.句子进行强调。
强调主语：It was I that (who) met Li Ming at the railway station yesterday.强调宾语：It was Li Ming that I met at the railway station yesterday.强调地点状语：It was at the railway station that I met Li Ming yesterday.强调时间状语：It was yesterday that I met Li Ming at the railway station.5、注意：构成强调句的it本身没有词义；强调句中的连接词一般只用that, who，即使在强调时间状语和地点状语时也如此，that, who不可省略；强调句中的时态只用两种，一般现在时和一般过去时。
原句谓语动词是一般过去时、过去完成时和过去进行时，用It was …，其余的时态用It is …。
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。
I.wa.the.tha.(who.cleane.th.classroo.yesterday.I.wa.i.th.stree.tha..me.he.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.no....unti....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...didn’.realiz.sh.wa..famou.fil.sta.unti.sh.too.of.he.dar.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.I.i.importan..necessary.right.strange.natural....tha....由于主句中的形容词不同, tha.后的从句中要用虚拟语气（shoul..动词原形）, shoul.可以省去。
高中英语 语法 it的用法
判断下列句子是否是强调句。
1. It’s in that very seat that the teacher sat down.
2. It is clear that not all boys like football.
3. It was because he was ill that he didn’t go to school.
I wonder_w_h_e_r_e _i_t _ w__as_ th_a_t_you met your old friend.
1) He didn’t go to bed until ten o’clock.
It was not until ten o’clock that he went to bed. 直到十点他才上床睡觉。
强调词it和形式主语it的判别： 可用恢复原句的方式来判别，即把it is/ was… that…取消后，如果剩下的词仍能组成一个完 整的句子，那么就是强调句型，否则就不是。
易混淆题：
It was at the street corner that I met Lucy yesterday. It was the street cornerwhere I met Lucy yesterday.
Grammar
(完整版)高中语法：it用法
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。
it考点讲义：it用作形式主语和形式宾语的用法归纳总结- 高考英语语法二轮复习专题.docx
高中英语语法高考二轮复习it考点讲义【精讲版】it用作形式主语和形式宾语的用法归纳总结一、用作形式主语当不定式、动名词、从句等用作主语时，避免头重脚轻，通常在句首使用形式主语厄而把真正的主语放在句子末尾。
如：It is stupid to do such a thing.做这种事真蠢。
It's no good sitting up too late.熬夜没有好处。
It is necessary that he should be sent there at once.有必要马上派他到那里去。
注：类似以下句子中的il也可视为形式主语：It happened that the harvest was bad in 1988.碰巧1988 年的收成很不好。
It seems that she is afraid to tell them about it.似乎她怕将此事告诉他们。
二、用作形式宾语当不定式、动名词、从句等用作宾语且其后跟有宾语补足语时，就应在宾语补足语前使用形式宾语，而将真正的宾语移至句末。
如：I've made it a rule never to hurry,我已养成凡事从容不迫的习惯。
Do you think it possible to root out crime?你认为可以根除犯罪吗？He found il difficult to breathe at high altitudes.他觉得在高空呼吸困难。
注：通常意义的形式宾语主要见于真正宾语为不定式、动名词、从句等且其后跟有宾语补足语时的情形，即用于“动词+it+宾语补足语+真正的宾语”这样的结构，但以下两类形式宾语却比较特殊，其后没有宾语补足语:1.由于介词后通常不能直接跟that从句作宾语，有个别特殊结构就在介词后先接it作形式宾语，再跟that从句。
如：You may depend on it that it is true.你可以相信这是真的。
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it的用法
一、考点聚焦
1、it的基本用法
（1）用作人称代词，代替前文提到过的事物。
The train has arrived. It arrived half an hour ago.
（2）用以代替提示代词this, that。
[来源:学,科,网Z,X,X,K]
—What’s this? —It’s a knife.
—Whose watch is t hat? —It’s mine.
（3）起指示代词的作用，指一个人或事物。
—Who is knocking at the door? —It’s me.
（4）指环境情况等。
It was very noisy(quiet) at the very moment.
（5）指时间、季节等。
—What time is it? —It’s eight o’clock.
It often rains in summer here.
（6）指距离。
It is a long way to the school.
（7）作形式主语。
It is not easy to finish the work in two days.
It is no use crying over spilt milk.
It is as pity that you didn’t read the book.
（8）作形式宾语。
I think it no use arguing w ith him.
I found it very interesting to study English.
He made it clear that he was not interested in that subject.
（9）用于强调结构。
It was Xiaoming whom(that)I met in the street last night.
It was in the street that I met Xiaoming last n ight.
It ws last night that I met Xiaoming in the street.
It was I who met Xiaoming in the street last night.
2、含有“It is …”的句型
（1）It is time (for sb.) to do sth.
It is (high) time that sb. did sth.(虚拟语气)
（2）It is + 形容词（+of / for sb.）+ to do sth
通常用 of的词有brave、clever、careful、hopeless、kind、good、naughty、nice、silly、stupid、foolish、wise 等。
（3）It is + 形容词+ that + sb. + (should) do sth.（虚拟语气）[来源:学科网ZXXK]
能用于这个句型的形容词有strange、wonderful、natural、good、proper、right、wrong、well、fortunate、important、necessary、useless、likely、probab le、impossible等。
有时可省去should而直接用动词原形。
如：It is important that we should pay close attention to grain.
It is natural that he（should）say so.
（4）It is no use/ good + doing sth.
It is no use trying again = It is of no use to try again.
（5）It is + 被强调部分+ that/who + …[来源:学科网ZXXK][来源:Z+xx+]
Was it in the street that you met her?
Who was it that called him“comrade”?
It was not until yesterday that I met my old friend.
It is in a small factory that my brother is going to work.（注意上述各句均为强调句型的“考点”）
比较：It is a small facto ry where my brother is going to work.（定语从句）
（6）It is said/reported/announced/ (well) known … that…
（7）It is/was + 时间+ since … 从……已多久了。
It is three years since I met him in Beijing.
It was a long time since I (ha d) lived in that small mountain village with these farmers.（注意两句中的时态）It is five months since I arrived in New York.我到纽约已经五个月了。
It is five months since I was in New York.我离开纽约已经五个月了。
（注意：终止性动词表示从动作发生时算起；如果是状态动词或持续性动词，则从动作或状态结束时算起。
）（8）It is + 时间+ before …
这个句型和上面句型中时间都是时间段，如long、years、months、weeks、five days、three hours、twenty minutes 等。
不过主句的时态多用一般将来时或一般过去时。
It will be several years before we meet again.
我们要过好几年才能再见面。
[来源:Z_xx_]
It was not long before they set out for the front.
不久他们就出发去了前线。
（9）I t is /was/will be the first/second/third … time that …
It is t he first time that I have been here.
It was the second time that he had seen the film.
（10）It is up to sb. to do sth … 应由某人做某事。
It is up to you to decide whether we start or not.
二、精典名题导解
选择填空
1. _________ is a fact that English is being accepted as an int ernational language.(NMET 1995)[来源:]
A.There
B.This
C.That
D.It
解析：答案为D。
本题考查作形式主语的用法。
that引导的从句是真正的主语。
为避免头重脚轻而平衡句子结构，将it置于句首作形式主语。
2. I hope there are enough glasse for each guest to have ________.(NMET 1995)
A.it
B.those
C.them
D.one
解析：答案为D。
本题考查替代词it和one的区别。
it用于替代同类的、特定的、同一的事物；one替代同类的、泛指的人或物。
根据题意“我希望有足够的杯子使每个客人有一个。
”可知应用one泛指enough glasses 中的一个。
3. Was __________ that I saw last night at the concert?
A.it you
B.not you
C.you
D.that yourself
解析：答案为A。
本题考查强调句型的疑问式。
只须将句序变为陈述句便不难得出答案。
4.It was back home after the experiment.
A. not until midnigh t did he go
B. until midnight that he didn’t go
C. not until midnight that he went
D. until midnight when he didn’t go
解析：答案为C。
此题考查的是not…until句型的强调结构，其最根本结构是：He did not go back home after the experiment.①,把①转变为Not until midnight did he go back home after the experiment.②,注意②中的倒装结构，把②中划线部分放在强调结构It be 被强调部分that…中进行强调，但注意that从句后面不用倒装形式。