It构成的句型小结
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．．．）＂。
it做主语的句型
IT 作为主语的句子类型主要包括以下几种：1. 一般陈述句：例如：IT is a beautiful day.（今天是个美好的一天。
）2. 疑问句：例如：What about IT?（怎么样？）3. 否定句：例如：IT isn't working.（它没在运作。
）4. 祈使句：例如：IT needs fixing.（它需要修理。
）5. 感叹句：例如：How amazing IT is!（多么惊人啊！）6. 一般疑问句：例如：Does IT work?（它运作吗？）7. 特殊疑问句：例如：Which IT do you mean?（你指的是哪个？）8. 选择疑问句：例如：Do you want IT or that one?（你要哪一个，这个还是那个？）9. 被动句：例如：IT is being repaired.（它正在被修理。
）10. 宾语从句：例如：I think IT is a good idea.（我认为这是个好主意。
）11. 状语从句：例如：However IT happens, we should be prepared. （无论怎样，我们都应该做好准备。
）12. 名词性从句：例如：IT is obvious that he is talented.（他很天赋。
）13. 条件句：例如：If IT rains, we will stay indoors.（如果下雨，我们就在室内活动。
）14. 虚拟语气：例如：What would IT be like if IT were summer? （如果现在是夏天，它会是什么样子？）15. 比较级和最高级：例如：IT is the best solution.（这是最好的解决方案。
）16. 倍数表达：例如：IT costs twice as much as that.（它的价格是那个的两倍。
）17. 并列句：例如：IT rains and snows simultaneously.（雨和雪同时下。
it的句型
It句型--高考重点It 引导的句型虽不是高考的热点，但近三年全国各省市试题中经常出现，我们不能疏忽。
考查的重点主要有三个方面：1.it引导的强调句型；2. it作形式主语或者形式宾语；3. it 和since、before、when等连用。
为了提高同学们的应变能力，现对it引导的一些常见句型归纳和总结如下：1。
It + be + 时间+ since-clause主句多用一般现在时，从句用一般过去时，如果表示过去的情况，主句用一般过去时，从句用过去完成时，或主句用过去完成时，从句用一般过去时。
It is three years since his father passed away . (从现在算起)It was 10 years since they married . (从过去算起)It had been fifteen years since she left Shanghai . (从过去算起)30 years has passed since we joined the Party . (从现在算起)2. It + be + 时间+ before-clause这句型中的时间一般为表示一段时间的词语(如：long years , months , weeks , days ,hours , minutes ) ，主句中的谓语动词用肯定式，意为"过多长时间才......"。
主句的谓语动词是否定式时，意为"没过多长时间就......"、“不久就……”。
主句的时态可用过去时was/wasn’t或将来时will be/won’t be；用was 时，before从句的动词用一般过去时；用will be 时，before 从句常用一般现在时。
It was not long before she learned those poems by heart . 她没过多久就背会了那些诗歌。
（完整版）It的用法总结
（完整版）It的用法总结It的用法总结在英语中,it有许多不同的用法,它既可以用作代词(如人称代词、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。
.it用作代词(1) 用作人称代词在句子中作主语或宾语；指前面已经提到过的事物、动物或人，且it指特定的事物；如果指前文中提到的事物中的任何一个，用one。
one可以与any, each, every, not等连用，但one 不可代替不可数名词。
—where’s your car?—it’s in the garage. 你的汽车在哪儿呢？在车库里。
(指代物品your car)did you hit it? 你打中了吗？ (指代事件)the baby cried when it was hungry.这婴儿饿时就哭。
（指代婴儿，尤指性别不详或无所谓时）—who is that?—it’s me. 是谁？我。
(指一定情景中所确定的人或事物，此时相当于指示代词，代指this和that,有时也指人)—what’s this?—it’s a box. 这是什么？一只箱子。
(2) 作非人称代词表示天气、日期、时间、温度、距离、价值、路程、度量、自然现象与环境等。
也可模糊地指一般情形或上文的部分或整个意思。
译成汉语时，it通常不一定译出来。
it’s a long time since they left. 他们走后很久了。
it’s two miles to the beach.离海滨有两英里远。
that’s just it—i can’t work when you’re making so much noise.原因就在这里——你弄出这么大的声音，我工作不了。
另外，需要注意两点：（1）“it’s time…”后面可以接不定式和介词短语表示“是做……的时候了”。
如：it’s time for supper. it’s time to have supper.(2) “it’s time…”后面还可以接一个从句，但是从句中的谓语动词一定要用过去式即虚拟语气，如：it’s time we had lunch.是我们吃饭的时候了。
it作形式主语的句型
it作形式主语的句型
1、It + be + 形容词 + that从句：表示某事物具有某个特征或属性。
例如：It is important that we arrive on time.（我们按时到达很重要。
）
2、It + be + 名词短语 + that从句：表示某个事物符合某个特征或属性。
例如：It is a shame that he didn’t come to the party.（他没来参加聚会真是遗憾。
）
3、It + be + 过去分词 + that从句：表示某个动作已经被完成或已经发生。
例如：It is said that the book will be published next month.（据说这本书将在下个月出版。
）
4、It + be + 现在分词 + that从句：表示某个动作正在进行或正在发生。
例如：It is raining hard outside.（外面正下着大雨。
）
5、It + be + 不定式短语 + that从句：表示某个动作将要发生或被计划。
例如：It is to be announced tomorrow if the meeting will be held as scheduled.（明天将宣布会议是否按计划举行。
）
这些句型中的“it”通常被称为“形式主语”，因为它在句子中充当主语，但实际上并不是真正的主语。
这种用法是为了使句子更加通顺或强调某种特定的信息。
it的9个常用特殊句型
含it的9个常用特殊句型1. It appears/ happens/ seems/ says that…It seems that he is always correct. 他好像总是对的。
It happened that I had no money with me. 碰巧我当时没有带钱。
2. It is said/ reported/ believed/ understood that…It is said that he has joined the Party. 据说他已经入党了。
3. It doesn’t matter…It doesn’t matter what he says. 他说什么都没关系。
4. (It is) no wonder( that) …It’s no wonder he is not hungry; he has been eating sweets all day. 难怪他不饿，他整天在吃糖果。
5.It is a waste of time /money doing sth.It’s a waste of time your talking to him. 你和他谈是浪费时间。
6. It makes no/mush difference…It’s doesn’t make much difference my being there. 我在不在那儿没有什么影响。
7. it takes sb. some time to do sth.It took me nearly an hour to work out the problem. 花了我差不多一个钟才做出那道题.8. It’s one’s turn to do sth.It’s my turn to clean the classroom. 是轮到我打扫教室的了。
9.If it were not for…If it were not for your help, I would still be homeless. 若不是你帮忙，我现在还是无家可归。
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。
四.It的句型
It的句型it常用在以下句型中：1.It is ＋时间段＋since ＋主语＋did“自从……以来已有一段时间”。
2.It is/was difficult/ easy/ necessary/ important It is/was (a/an) pleasure/ pity/ shame/ funIt appears/seems/looks certain /is said that Sb.+think/ make/ find it +adj to do /that3.形式主语it：be+形容词+不定式It’s better to be early. be+名词+不定式It was his duty to take care of you.be+介词短语+不定式It’s beyond me to say why. It + 及物动词+宾语+不定式It makes me sick to do it.be+名词+动名词It’s no good standing here in the cold.be + 形容词+动名词It’s helpless trying to persuade her.其他结构+动名词It doesn’t matter waiting a few more days.4.用于由that 引导的主语从句，有下面几种类型：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 +动词（+宾语）+that从句( happen, turn out, appears等)It happened that she wasn’t in that day. It never occurred to me that perhaps she was lying.It+动词的被动语态(said/believed/thought/expected/reported/known/announced/decided/learned/ expected/arranged/suggested…+that从句It’s said that there has been an earthquake in India.5.It 代表that引导的从句：I took it for granted (that)认为理所当然you would be coming.6.It代表连接代（副）词引导的从句：He hasn’t made i t clear when he is coming back.They haven’t made it known where the meeting is to take place.7.it跟从句用法：1）it +be+形容词+从句：It is not clear to me why he behaved like that. (obvious, necessary，right，strange，natural, true…) 注意两种句型：It’s easy (difficult, hard, important, possible, impossible,comfortable, necessary, better; the first, the next, the last,the best, too much, too little, not enough) 后加for sb. to doIt’s kind (nice, stupid, rude, clever, foolish, thoughtful,thoughtless, brave, considerate (考虑周到的), silly,selfish (自私的) )后加of sb. to do2）it +be+名词+从句: It’s a puzzle how life began.（a fact, a shame, an honor, no wonder…）3）it +动词（+宾语）+从句It doesn’t matter much where we live.4）it +动词的被动语态+从句It is not decided who will edit it.5）it +动词be +that从句No, it couldn’t be that they were interested in him.6）It +be + 一点时间+ when…It was Christmas Eve when I got the news of his being killed in a car crash. 7）It +be+一段时间+ since…It is/has been three week since I last heard from him. 8）It is time to do/ that…(谓语用过去时态）It is time for us to give the house a cleaning. It is time that we gave the house a cleaning.9）It + be + the first/second time that… (谓语动词用完成时态）It is the first time in history that two Nobel Prizes have been awarded to the same person.10）It takes sb. t ime to do…It took Mary 20 minutes to choose a suitable dress for the party.11)It 用于强调句陈述句It+动词be+强调部分+who(whom)/that+其他部分一般疑问句Is (was) it +强调部分+ that…?特殊疑问句特殊疑问词+is/was it that…？12）固定句型①④⑤⑥⑦⑧It + takes + sb. + some time +to do =sb. + spend + some time + (in) doing做某事花费某人多长时间”②It costs + sb. + some money +to do sth. cost + sb. + some money某人花费钱做某事sb. spend + some money + on + sth. sb. pay + some money + for sth. sb. buy + sth. + for + some money③It is + no use + 动名词eg.It is no good learning English without speaking English.能以动名词作主语的这类句子并不多，主要在以no good, no use, useless, worthwhile, 等词作表语的句子中用。
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It 构成的句型小结一、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：㈠ it 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。
It takes five minutes to walk there. 走到那里需要 5 分钟。
It took me three days to prepare for the examination. 我花了三天准备那次考试。
It takes a lot of money to buy a house like that. 买那样一幢房子需要很多钱。
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 to speak. 对安妮来说，教我说话需要极大的信心和想象力。
It takes time for them to prepare for the great changes that take place in space. 他们需要很多时间准备应付太空中所发生的巨大变化。
3. It is + 形容词+ (for / of sb.) to do sth. 某人做某事是... 的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。
of sb 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。
What time would it be most convenient for me to call again? 什么时候我再给你打电话最合适？It 's very good of you to have listened to me. 感谢你能听我讲。
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。
As a student, it is bad manners to come late to class. 作为学生，上课迟到是没有礼貌的。
It is our duty to pay taxes to our government. 向政府交税是我们的义务。
5. It is + one ' s turn + to do sth.轮到某人做某事It was my turn to clean the blackboard. 轮到我擦黑板了。
It is his turn to take the children to school. 今天该轮到他送孩子们上学了。
6. It is + up to sb. + to do sth. 做某事是某人的责任或义务It 's up to us to give them all the help we can. 我们理应竭尽所能地给予他们帮助。
It 's up to you to decide whether to go or not. 应该由你决定是否去。
Up to you! 由你来定！㈡ it 代指动名词短语的句型7. It is + 名词+ doi ng sth. 做某事是..... 用于该句型的名词有：no good, no use 等。
It 's no use talking to him about it. 和他谈论此事是没用的。
It 's no use/good (in) crying over spilt/spilled milk. 事已至此，后悔也无用。
(牛奶已泼，哭也没用。
)8. It + be + 名词 + that 从句用于该句型中的名词有： a pity, a shame, a fact, an honour, a wonder, a good thing, good news, no wonder 等。
惯用句型有：It is com mon knowledge that ........ 是常识It is a surprise that …令人惊奇的是It is a fact that …事实是....It is no wonder that …难怪...... (No wonder! 难怪呢)例如：It is a pity that she has made such a mistake 真遗憾，她犯了这样一个错误。
It's a pity that you should have to leave. 你非走不可真是件憾事。
It is a thousa nd pity/ thousa nd pities that he missed the cha nee. 他错过了这次机会真是太可惜了。
It is no won der that he has passed the exam in ati on. 难怪他考试及格了。
It is a shame that you have to leave so soo n. 你必须这么早离开，真遗憾。
It was a stupid thing that he didn ' t listen to his tea他不■听老师的话，真蠢。
It is a great honour that he receive that prize. 他得到了那个奖真是无上的荣耀。
10.lt + be + 形容词 + that从句.... 是......用于该句型中的形容词有：clear, obvious, true, certain」mporta nt, stra nge, n atural, surpris ing, fortun ate,good, won derful, funny, possible, impossible, likely, un likely, quite clear, unu sual 等。
惯用句型有：It is n ecessary that …有必要.......It is important that …重要的是 ...It is obvious that …很明显..........It is importa nt that we (should) learn En glish well. 我们学好英语是非常重要的。
It is n ecessary that the stude nts (should) remember all the new words. 学生记住所有的新单词是必要的。
11. It + be + -ed 分词 + that从句据... 是.... 的常见的过去分词有：said, reported, lear ned, announ ced, known, decided, expected, believed,con sidered, declared, felt, hoped, see n, supposed, thought, un derstood 等。
惯用句型有：It is said that …据说It is reported that …据报道It is believed that …大家相信It is hoped that …大家希望It is well known that ••众所周知It is thought that …大家认为It is suggested that …据建议It has bee n decided that ••大家决定It must be remembered that 务必记住的是It is reported that another man-made satellite has been put into orbit.据报道，又有一颗人造卫星被送入轨道。
It is said that he has go ne to the USA for further study. 据说他已去美国深造了。
It is known to all that the sun rises in the east. 众所周知，太阳从东方升起。
It has bee n decided that we should desig n the mach ine ourselves.已经决定我们自己来设计这部机器。
若sth/sb.做了主语则用下列句型：sth./sb. be said/ reported/ believed 等 +to do sth例如： Three thousa nd people were reported to die in the earthquake.据报道，三千人死于地震。
Ano ther hospital is said to be built next mon th. 据说下个月又一家医院要建。
12.lt +及物动词+名词+从句s foggy or 对我来说，天气有雾或晴朗没什么关系。
It doesn ' take any differenee to me whether he goes or not. 13.lt +不及物动词 + that 分句常见的不及物动词有： seem, happen, look ，turn out (结果，证明，原来)，occur 等。
惯用句型有：It seem s that … 似乎 ...It (so) happens (that) …(那么)碰巧 ......It occurred to_me that … 我突然想起 .....It seems that he is sick. (= He seems to be sick.) 看来他似乎有病。