It 的常用句型及考点

It作形式主语常见句型动词不定式，动名词或主语从句作主语时，通常把它们放在谓语动词前，而用it作形式主语，放到句首，常见句型有：1. It + be + 形容词+主语从句，如：It is uncertain whether he can come to Jenny’s birthday party or not.2. It + be + 名词词组+ 主语从句，这类名词有：a fact, a pity, a shame, an honour，a question 等，如：It’s a pity that you missed the exciting football match.It remains a question whether he will come or not.3. It + be + 过去分词+ 主语从句，这类过去分词有：announced, believed, expected, hoped, decided, reported, said, shown等，如：It is reported that 16 people were killed in the earthquake.It is not decided who will give the operation to the patient.4. It + 不及物动词(seem, appear, happen等) + 主语从句, 这类不及物动词有：appear, happen, seem等，如：It seemed that he didn’t tell the truth.It happened that I was out when he called.5. It + be + 形容词+ for sb.）+ 动词不定式这类句型常用形容词easy, difficult, hard, important, possible，wise等作表语，有时候为了强调不定式动作的执行者，常在不定式前加for sb，如：It’s necessary for the young to master two foreign language.It is unwise to give the children whatever they want.这类形容词有：easy, difficult, hard, important, possible，wise6. It + be + 形容词+ of sb. + 动词不定式，这类形容词常是表示心理品质,性格特征的形容词，如：kind, nice stupid, clever, foolish, polite, impolite, silly, selfish, considerate等。

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作为形式主语的十大考点今天Mr. Hu向大家总结it作为形式主语的十个比较常考的考点，同学们可以通过所给的例句，记住下面的公式：1、It’s +形容词/名词+（for sb. / sth）+to do sth可以用于这类句型的形容词和名词以及例句如下：2、It’s +形容词+of sb. +to do sth这个句型是同学们最容易丢分的，大家需要知道在这个句型中，形容词是描述人的品德、特征。

同学们看一下能用于这个句型的形容词和例句：3、It’s +形容词/名词+doing sth在这个句型中，常见的形容词和名词有：no /little use, no /much good, useless等。

例如：It is no use crying over spilt milk.It is no good talking about other’s faults.4、It’s +形容词+that…能用于这个句型的形容词有：possible, important, impossible, necessary, strange, natural, surprising, obvious, true, likely, unusual等。

除了true, likely,obvious这三个词外，其他的词后面that从句一般要用虚拟语气，（should+动词原形）should可以省略。

大家看下面例句：5、It’s +名词+that…在这个句型中，常用的名词有：fact, honor, belief, good thing / news, （no）wonder, no doubt, pity, shame等。

如例句1。

需要注意的是，在使用pity和shame的时候，从句一般用虚拟语气（should+动词原形），should可以省略。

意思是表示出乎意料“竟然”，如果没有这种意义的时候，就可以不用虚拟语气。

如例句2和3。

it作形式主语和形式宾语it既可作人称代词，用来表示动物或无生命的物体等，也可以作无人称代词，在句中作主语，表示“时间”、“距离”、“天气”等。

它还可以引导强调句，使语气得以加强。

此外，it在句中能作引导词，充当句子中的形式上的成分，如形式主语、形式宾语等。

㈠it作形式主语：it作形式主语时没有具体的意义，而只是帮助把真正的主语移到句子后部去，使句子显得平稳一些。

it作形式主语时，可以代替三种形式：不定式、动名词和主语从句。

1. it代替不定式短语常用于下列句型中：It + be +形容词+ (for/of sb.) to do sth.It + be + 名词+ to do sth.It takes sb. some time to do sth. 干…花了某人…时间It’s up to sb. to do sth. 干…是某人的职责或义务如：①It is everyone’s duty to obey the law.遵守法律是每个人的义务。

（it作形式主语, 代替不定式短语to obey the law）②It is difficult for a foreigner to learn Chinese.对于一个外国人来说，学习汉语是困难的。

（it作形式主语, 代替不定式短语to learn Chinese）③It is not right to use these places as rubbish dumps.把这些地方用来倒垃圾是不对的。

（it作形式主语, 代替不定式短语to use these places as rubbish dumps）④It took them a year to build the bridge.建这座桥花了他们一年的时间。

（it作形式主语, 代替不定式短语to build the bridge）⑤It is bad manners to stare at people.瞪着眼睛看人是不礼貌的。

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。

考点十五It的用法it作为代词用法非常灵活，可用于代替上文中提到的事物，代替上文中说到的一件事，代替不知情的人（尤其是不知身份、性别和姓名的人）。

也可用于表示时间、天气、距离、计算结果等。

还可用来代替不定式、动名词、从句等，充当形式主语或形式宾语。

一、用于指人以外的一切生物、无生命的东西和事情一般指说话者心目中已经了解或所指的生物、无生命的东西或事情，没有性别的区分；可以是可数名词，也可以是不可数名词，在句子中既可以作主语，也可以作宾语。

1. 指动物和植物。

☞ Look at that bird. It always comes to my window. 看看那只鸟。

它总是飞到我的窗前来。

2. 指代无生命的东西。

☞This is my watch. It’s made in Switzerland. 这是我的手表。

它是瑞士产的。

3. 代替上文提到过的整个事情。

☞Well, you mustn’t play on the road. It’s dangerous! 哦，你不能在马路上玩。

这是危险的！二、用于指代人1. 指代说话者心目中不太清楚的那个人，常在打电话或敲门时用。

☞—Who is knocking at the door? ——谁在敲门？—It’s me. ——是我。

2. 指说话者心目中的那个人。

☞—Look, someone is coming. Who can it be? ——看，有人过来了。

他可能是谁呢？—It may be the headmaster. ——可能是校长。

3. 在回答用指示代词表示人的特殊问句时，常用it指人。

☞—Who’s that? ——那人是谁？—Is it Helen? ——是海伦吗？—Yes, I think you’re right. It’s Helen. ——是的，我想你说对了，是海伦。

三、用于指时间、距离和自然现象等1. 表示时间。

☞—What’s the date? ——今天是几月几日？—It’s the third of March. ——今天是3月3日。

it的用法总结it 的考点：1.为避免重复，it可用来代替前面说过的短语或句子。

如：I tried to persuade my father to give up smoking, but found it impossible. (it=to persuade my father to give up smoking)2.It/This/That+be+the first(second, third...) time+that这个句型表示截止到说话时为止的某人的一种经历，关键是注意time前有序数词，主句是一般现在时is时，从句要用现在完成时；如果主句用一般过去时was 时，则从句须相应地用过去完成时。

如：This is the first time(that) these Europeans have visited the Great Wall.It was the fifth time(that) I had paid a friendly visit to America.3.强调句：It's/was+被强调成分+that/who+其他成分原句：I told Jim the news in our office yesterday.【注】强调句与主语从句虽然在形式上很相似，即都含有it is(was)...that。

但，区别在于：强调句去掉itis(was)…that之后，句子结构仍然完整，而主语从句却不能这样。

如：(It is)our hope(that) the two sides will work towards peace.4.it 作形式主语：1）It is/was+adj.+subject-clause可用于此句型的形容词有：clear, certain, funny, good, impossible, likely, natural, obvious, possible, probable, strange, surprising, true, unusual, wonderful 等。

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。

中考英语it的常考句型及知识点归纳（附练习题）一、it 作人称代词的用法1.指事物作为人称代词，it 可以除人以外的一切事物或动物。

如：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”。

2.指人it 指人主要用于指不性别不明的婴儿或用于确认某人的身份。

如：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.有人在敲门，一定是邮递员。

【说明】在答语中，常用来指本人，如说It's me。

3.代替某些代词代词it 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?二、it 作非人称代词的用法1.基本用法it 作非人称代词的用法，主要用于指时间、距离、价值、天气、气候及温度等自然现象。

如：It's too late to go there now.现在去那儿已经太迟了。

It rained all day yesterday.昨天下了一天的雨。

It can get very hot here.这里有时会很热。

2.用于某些句型It's time for sth.该做某事了。

It's time to do sth.该做某事的时候了。

It's time for sb to do sth.某人该干某事了。