it用法及句型归纳
It的用法及典型句型归纳. 个人总结
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．．．）＂。
高考重点：It的用法以及含有it的句型
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。
it的用法及句型总结
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it4，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。
“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。
It的句型及用法
It的句型及用法It的基本用法1.it用作人称代词，代替事物，区别one。
That vase is valuable. It's more than 200 years old.那个花瓶很珍贵，它有200多年的历史。
Tom’s mother kept telling him that he should work harder, but it didn’t help.2.it用以代替指示代词this, that.1)--- What's this? --- It's a pen. —这是什么？—是一支钢笔。
2）--- Whose book is that? --- It's Mike's. —那是谁的书？—是迈克的。
3.指示代词it，常用以指人。
1）Go and see who it is. 去看看是谁。
2）--- Who is making such a noise? —是谁发出这样的吵闹声？--- It must be the children. —一定是孩子们。
4.当说话者不清楚或无必要知道说话对象的性别时，也可用it来表示。
1）It's a lovely baby. Is it a boy or a girl?宝宝真可爱，是男孩还是女孩？2)—Who’s there? --It’s me. Who else could it be?由于对方不知道自己的性别，因此用it回答who的提问。
5.it可用来指代团体。
The committee has met and it has rejected the proposal.委员会已开过会，拒绝了这项建议。
6. It常用来表示天气、气候、温度、时间、地点、距离等意义的句子中。
1）It is half past three now by my watch. 我的手表现在是三点半钟。
2）It is six miles to the nearest hospital from here.这里离最近的医院也有六英里。
it 的各种用法及与it有关的句型(30张)
当前面提到的事物不止一件时， it通常指最先提到的事物，而 This/that是指最后提到的事物。
1. We keep the ice cream machine in the spare room. It is mainly used by the children. (指 the machine)
也可以指动物或未知性别的婴儿。
What a beautiful baby， is it a boy? How about the baby? ---- I’ll take care of it.
hurt? You have saved my life. I shall never forget it.
强调句型的疑问句：
1. Who called him “comrade”? 2. How did you forget to lock the door?
Who was it that called him “comrade”? How was it that you forgot to lock the door?
3）one, ones, that, those
That替换单数可数名词或不可数名词；one只替换单数的可数名词。 The vase on the left is more beautiful than the one on the right. The coffee produced in Brazil is more famous than that in Mexico.
it +be+形容词+that从句： It is natural that they should have different views.
It +be+名词+that从句: It’s a shame that you’re sick.
It的用法归纳(2015年11月26日整理完毕)
it的用法归纳it既可以用作代词（人称代词，非人称代词），也可以用作引导词（作形式主语或形式宾语），还可以用来构成强调句型。
一、用作人称代词——这是it的基本用法。
1. 指事物-----指代上文或刚提到的事物，以避免重复。
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”。
Shanghai is a beautiful city, isn’t it?2. 指人-----指代未知性别的婴儿或身份不明确的人。
----Is this your dog？-----No, it isn’t.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.Someone is knocking at the door. Who can it be?【说明】在答语中，常用来指本人，如说It’s me。
3. 代替某些代词。
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?4. 指抽象事物:It was a great surprise to me when he did a thing like that．You’ve helped me a lot. I shall never forget it.I tried my best to persuade him to give up smoking, but it didn’t help.[辨析] 代词it ,one 和that.（1）it代替的是前面提到的同一名称的同一事物，即同名同物。
It的用法及句型总结
It的用法及句型总结"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，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 on e'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/conc ern/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。
it的用法
形式主语
1.It is clear ( obvious， true， possible， certain....) that ..... 1.It is very clear that he‟s round and tall like a tree.
形式主语
2. It is important ( necessary， strange， natural...) that ... that 后的从句中要用虚拟语气（should + 动 词原形。 It is important that we (should) have enough rice. It is necessary that he (should) remember these words.
3. 动词+ it+ as+ noun/adj. + 从句
accept, regard, take, see, view
例 The speaker takes it as encouraging
when many students attend his lecture.
4. 动词 +it + to sb. + that… owe it to sb. that…把…归功于… leave it to sb that…把…留给某人去做 take it for granted that 把…想当然 keep it in mind that… 把…记在心里 例 1.Don't bother to tidy your room.
It took thousands of people many years to build the Great Wall. 13. It doesn‟t matter whether ( if ) ... “不论（是否）．．．没关系．．．。 It doesn‟t matter if they are old.
(word完整版)it在高中阶段用法句型
It句型背诵一．It 做形式主语●to do 做真正的主语1. 我很方便和他取得联系。
It is convenient for me to get in touch with him.2. 你那样做是很愚蠢的。
It is stupid of you to do so.3. 我们听到那消息很惊讶。
It was amazing to us to hear the news4. 修长城花费了成千上万人很多年的时间。
It took thousands of people many years to build the Greatwall.●doing做真正主语5. 你和他理论是没有用的。
It is no use your arguing with him.6. 覆水难收It is no good crying over spilt milk.7. 雨天爬山真是有趣。
It is great fun climbing mountains on raining days.8这项工作值得做It is worthwhile doing the work.It is worthwhile to do the work.●that 做真正主语9. 他整天责备别人是不足为奇。
It is no wonder that he scolds others all day long.10. 据信他在国外学习/ 要去国外学习/ 去了国外学习。
It is believed that he is studying abroad / to go abroad for study/ has gone abroad for study. He is believed to be studying abroad/ to go abroad for study/ to have gone abroad for study.11. 我突然想起我忘了锁门。
It 的 13 个常用句型及其运用!书面表达必备!
It 的13 个常用句型及其运用！书面表达必备！It 的13 个常用句型及其运用it 虽然并不显眼，但只要运用得当，也能在书面表达中发挥出巨大的作用，给人以高大上的感觉。
本文在归纳其常用的句式结构的基础上着眼于在书面表达中如何恰当地运用it 的相关句型，以达到优化句子，增加文章亮点。
01一、it 句型的归纳：( 一) it 作形式主语的 6 个句型句型1. It is + adj. (=of n.) + for sb. to do sth. / that... 某人做某事是……的。
Will it be convenient for you to start work tomorrow? 你明天开始工作方便吗?It is vital /of great significance for students to take regular exercise. = It is vital /of great significance that students should take regular exercise. 定期进行锻炼这对学生来说太重要了。
句型2. It is a shame / pity that... 很遗憾……(1) It is a shame that some students should scribble and litterrandomly on the campus. 一些学生竟然在校园中乱涂乱画，乱扔垃圾，这真是太不应该了。
(2) It is a pity that I cannot go to see the movie on Saturday evening. 很遗憾，周六晚上我没办法陪您去看电影了。
说明： that 引导的从句为主语从句，从句中谓语动词的语气分两种情况：①表述的内容是事实，用陈述语气 , 如例句 (2) ；②若内容表明说话人的一种语气 / 情感则使用虚拟语气 , 如例句 (1) 。
it的用法、常用句型
I’d prefer it if I didn’t have to do so much
work.
I would appreciate it very much if you would
help me with it.
b. 动词+介词+ it + that从句 能用于此句型的主要有：depend on, answer for, see to。如： You may depend on it that he will turn up in time.
reputation of an honest man.
It was no accident that such a book should
appear in the 18th century. 2) “It + be +形容词+主语从句”中从句谓语常用 “（should +）动词原形（或完成时）”。常用 于本句型的形容词主要有impossible, strange,
2. —Steven’s parents have bought him a computer.
—__I_t _ __is__ __n_o_ _w__o_n_d_e_r_ (难怪) that he looks so happy.
3. Susana’s aim is to tell all citizens they have a duty to protect the environment, _is_n_’_t_ __it_ (对吗)?
2. Raise your leg and let 65 stay in the air for seconds. （辽宁2014第三部分）
It的用法(超全)
---------------------------------------------------------------最新资料推荐------------------------------------------------------It的用法(超全)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，因此在复习中应给予足够的重视。
句型归纳：1． It is ＋adj．(＋for sb．／sth．) ＋ to do sth．用于此句型的形容词有：easy， hard， difficult，possible， important， impossible，necessary， good， bad， exciting， interesting， surprising 等。
如：It is necessary to change your job． It was very hard for them to walk such a long way in the snow． 2．It is ＋n．(＋for sb．／sth．) ＋ to do sth．用于此句型的名词有：pity, shame, pleasure, ones duty, ones job, fun, joy, good manners, bad manners 等。
如：It is a pity for you to have missed such a wonderful play． It is bad manners for the young to take up the seats for the old． 3．It is ＋adj．＋of sb．＋to do sth．此句型中的形容词主要描述某人的品德、特征。
能用于该句型的形容词有：1 / 13kind, nice, wise, silly, polite, impolite, friendly, foolish, clever 等。
it的用法
一、It作形式主语的句型为使句子平衡，往往把it置于句首作形式主语，而把真正的主语（通常是不定式短语、动名词短语或主语从句）移至句末。
It 作形式主语的句型有：㈠it 代指不定式短语的句型1. It takes + (sb.) + sometime / some money + to do sth.做某事花去某人多长时间Just a minute, it won't take me long to change.等一下,我很快就可以换好衣服。
2. It takes + 名词+ (for sb.) to do sth. 某人做某事需要… …It took great imagination as well as patience for Annie to teach me tospeak.对安妮来说，教我说话需要极大的信心和想象力。
3. It is + 形容词+ (for / of sb.) to do sth. 某人做某事是… …的常用于该句型的形容词比较多。
for sb. 的句型常用于表示事物的特征特点，表示客观形式的形容词，如easy, difficult, hard,important, possible, impossible, comfortable, necessary, better等。
ofsb的句型一般用表示人物的性格，品德，表示主观感情或态度的形容词，如kind, nice, stupid, rude, clever, foolish, thoughtful, thoughtless, brave, considerate(考虑周到的), silly,selfish(自私的) 等。
It was kind of you to help us.谢谢你对我们的帮助。
4. It is + 名词+ to do sth. 做某事是… …的常用于该句型的名词有：manners, duty, fun, good, a great honour等。
It的用法及其句型详解
“It”的用法及其句型详解“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. +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.“It”用法及其句型和固定搭配讲解2007-05-01 17:14:05.0中国高中生网()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 mendour 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。
it的用法 常用句型 学而思
it的用法常用句型学而思“it” 在英语中是一个非常常用的代词，可以用来代替人或物，也可以用来表示时间、天气、距离等。
以下是一些常见的“it” 的用法和常用句型：1.代替人或物：o It's me. 是我。
o Who is it? 谁啊？o It's a beautiful day. 天气真好。
2.表示时间、天气、距离等：o It's 7 o'clock. 现在七点。
o It's raining. 下雨了。
o It's a 10-minute walk. 步行十分钟。
3.作为形式主语：o It's important to learn English. 学英语很重要。
o It's a pleasure to meet you. 很高兴认识你。
4.作为强调句型的构成部分：o It was I who/that saw the movie. 是我看的电影。
o It was you that solved the problem. 是你解决了问题。
5.表示身体状况：o I feel terrible. 我感觉不舒服。
o She's feeling much better today. 她今天感觉好多了。
6.表示建议或请求：o Shall we go for a walk? 我们去散步好吗？o Could you pass me the salt? 请把盐递给我好吗？7.表示某件事情已经发生或正在发生：o They have already left. 他们已经离开了。
o The movie is starting in 10 minutes. 电影十分钟后开始。
8.表示强调或加强语气：o It is essential that we learn English well. 我们必须学好英语。
o It is only you that can help me. 只有你能帮我。
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it用法及句型归纳
it为人称代词，主格与宾格同形。
该词用法灵活，下面帮助同学们作以归纳。
一、可用来代替指示代词this或that。
例如：
—What's this/that? 这/那是什么？
—It's a ruler. 这/那是尺子。
二、表示时间、距离、天气、数字等。
例如：
1. —What's the time?几点了？
—It's ten to ten. 九点五十。
2. —What's one plus two? 一加二等于几？
—It's three. 等于三。
三、用来代替前面提到的人或物。
例如：
This is my pen. Give it to me, please. 这是我的钢笔，请把它给我。
四、指心目中或上下文中所指的人或物。
例如：
1. —Who's that over there? 那边的人是谁？
—Is it Bill? 是比尔吗？
2. Miss Gao has a computer. It's new. 高老师有一台电脑，它是新的。
五、指身份不明、性别不详的人或者指照片中的人。
例如：
—What's the baby in the picture?照片中的那个婴儿是谁？
—It's me. 是我。
六、在电话用语中，可用it来指代对方或者自己。
例如：
—Hello! Who's it? 喂，你是哪位？
—It's Jim. 我是吉姆。
在初中英语教材中，出现了许多由it引导的固定句式，现归纳如下：
一、It's time for sb. to do sth. / It's time for sth.意为"是(某人)该干……的时间了"、"到……的时候了"。
例如：
1. It's time for supper ／to have supper.该吃晚饭了。
2. It's time for me to study.我该学习了。
二、It takes(sb.)some time to do sth.意为"(某人)花……时间做某事"。
例如：
1. It takes twenty minutes to go to school by bike. 骑自行车上学要花二十分钟的时间。
2. It took me a week to finish reading the book. 我花了一周时间读完这本书。
三、It is one's turn to do sth.意为"轮到某人做某事了"。
例如：
It's your turn to be on duty tomorrow. 明天轮到你值日了。
四、It is ／has been ＋时间段＋since ＋一般过去时，意为"自从……以来已过了……(时间)。
" 例如：
1. It is / has been four days since I caught a cold. 我感冒已四天了。
2. It is / has been two weeks since we met last. 自从我们上次见面以来已过了两周。
五、It seems ／seemed ＋that从句，意为"看起来好像……"。
例如：
It seemed that our team was going to win. 我们队看起来好像要赢了。
六、It's＋表语＋to do sth.。
例如：
It's a good idea to go out for a walk. 出去散步是个好主意。
七、It's ＋adj.＋that从句。
例如：
It's true that I may fall behind the other students.我真可能落在别的学生后面。
八、It's＋adj.＋of(for)sb.＋to do sth.。
对于这个句型究竟用of还是用for，主要取决于前面的形容词。
如果形容词是描述不定式行为者的性格、品质等的，如kind，good，nice，clever 等用of；如果形容词仅仅是描述行为的则用for，这类形容词常见的有difficult，easy，hard，important，dangerous等。
例如：
1. It is nice of you to come to see me.你能来看我真好。
2. It is dangerous for children to play with fire.对小孩儿来说玩火是危险的。
九、It is + V-ed分词+ that 从句
It is said that…据说……
It is thought that…人们认为……
It is believed that…人们相信……
It is known that…众所周知……
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