It”作形式主语和形式宾语用法详解

一. it作人称代词在特定的环境中，it可指人，如指婴儿、性别不详或身份不明的人。

e.g.1. The baby stopped crying as soon as it saw the woman.（指婴儿）2. —Who is it?—It’s me.（性别不详或身份不明）二. it作形式主语或形式宾语it可以作形式主语或形式宾语而把真正的主语或宾语后置。

1. 用it作形式主语的情况：(1) It＋系动词＋形容词＋that从句It is necessary/important/surprising/strange＋that从句，从句中谓语动词常用“should＋动词原形”形式，且should可省略。

(2) It＋系动词＋名词＋that从句It is a pity/a shame/good news/a fact/an honour/a wonder/no wonder/our duty＋that从句。

e.g. It’s no wonder that you’ve achieved so much success.难怪你取得了如此大的成功。

(3) It＋不及物动词＋that从句It seems/happened/turned out /occurs/appears＋that从句。

e.g. It happened that he was out when I called on him.当我去拜访他的时候，碰巧他出去了。

(4) It＋系动词＋过去分词＋that从句It is said /reported/ announced/ believed/ thought/ well known/ hoped/ pointed out/ found out/ suggested/ ordered/ advised/ requested/ insisted/ required/ demanded＋that从句。

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”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 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.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作形式主语与形式宾语it作形式主语与形式宾语形式主语形式主语是动词不定式的一种，它也是逻辑主语, 可以把它归类到逻辑主语的第一种（不定式的逻辑主语）。

用作宾语的不定式，用作目的状语的不定式，用作结果状语的不定式都是属于不定式的大概念里面的。

详细用法综述形式主语it作为形式主语的it并无实际语义，只是为满足语法上的需要，避免句子头重脚轻，它代替的是句子的逻辑主语，概括起来会有如下情况：? 句子的逻辑主语为不定式如：It is very kind of you to give me a hand in time. It is my pleasure to address the meeting.It was pretty hard for him to bring up the child on his own.? 句子的逻辑主语为从句如：It so happened that the tickets were sold out.It is extremely obvious that she has been lying about her identity.It suddenly occurred to me that the message must have been hidden between the layers of the briefcase.? 句子的逻辑主语为动名词短语这类句子远不如前面两种出现率高，主要在（no good, waste, useless, no use, dangerous）等词语的后面用。

如：It is no use reasoning with him. It is no good reading in dim light.作形式主语的代词只能用it，不能用that、this等词。

例如:1）It is easier to lose friends than to make friends. 交朋友难而失去朋友比较容易。

it作形式主语或形式宾语的用法1. it用作形式主语当不定式、动名词、从句等用作主语时，为避免头重脚轻，通常在句首使用形式主语it，而把真正的主语放在句子末尾。

如：It’s a pity to refuse. 拒绝是令人遗憾的。

It’s no use saying any more about it.再谈这事没有用。

It’s not known where she went.她到哪里去了没人知道。

注：It is said / reported / believed / understood that…这类结构中的 it 也是形式主语。

如：It’s reported that two people were injured in the accident. 据报导这次事故中有两人受伤。

2. it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 find it easy to get on with her. 我发现她很容易相处。

I think it best that you should stay here. 我认为你最好住这儿。

They haven’t made it known where they are to hold the conference. 他们还没宣布会议在哪里开。

几种特殊的形式宾语it1. enjoy, like, dislike, love, hate, prefer, appreciate等动词后接 if 从句或 when 从句，通常应先在动词后接 it 作形式宾语。

如：She won’t like it if you arrive late. 她不喜欢你迟到。

He hates it when people use his bike. 他讨厌别人用他的自行车。

I hate it if you say such things in public. 我讨厌你在大庭广众之下说那样的事。

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。

“It”作形式主语和宾语It作形式主语和形式宾语用法，是中学阶段英语学习的主要语法项目之一。

纵观历届高考题，无论是单项选择，还是完形填空，it用法始终是反复考查的重、热点之一。

现将it在特殊句型中作形式主语和形式宾语用法，进行如下归纳分析。

一、It 用作形式主语当不定式（短语）、动名词（短语）或从句在某个句子中作主语时，为保持句子结构前后平衡，避免头重脚轻，因此常用it作形式主语置于句首，而将真正的主语放在句尾。

此时it只起先行引导作用，本身无词义。

e.g. It is wrong to tell a lie.(说谎是错误的。

) 〔It为to tell a lie的形式主语〕It is no use arguing about it.(争吵是没用的。

) 〔It为arguing about it的形式主语〕It is uncertain who will come.(谁要来还不确定。

) 〔It为who will come的形式主语〕It 作形式主语的常见句型：① It + be + 形容词+ to do sth. / doing / that ….e.g. It is very important to learn a foreign language.(学一门外语非常重要。

)It is useless crying over the spilt milk.(覆水难收。

)It was really surprising that she married a man like that.(她嫁给那样的男士真让人惊讶。

)② It + be +名词词组+ doing / that ….e.g. It is no good telling lies.(撒谎没好处。

)It is a pity that you didn’t go to see the film yesterday.(你昨天没看成那部电影真遗憾。

it作形式主语和形式宾语用法2009-09-21 09:58:41| 分类：study | 标签：|字号大中小订阅一、It 用作形式主语当不定式（短语）、动名词（短语）或从句在某个句子中作主语时，为保持句子结构前后平衡，避免头重脚轻，因此常用it作形式主语置于句首，而将真正的主语放在句尾。

此时it只起先行引导作用 ...一、It 用作形式主语当不定式（短语）、动名词（短语）或从句在某个句子中作主语时，为保持句子结构前后平衡，避免头重脚轻，因此常用it作形式主语置于句首，而将真正的主语放在句尾。

此时it只起先行引导作用，本身无词义。

e.g. It is wrong to tell a lie.(说谎是错误的。

) 〔It为to tell a lie的形式主语〕It is no use arguing about it.(争吵是没用的。

) 〔It为arguing about it的形式主语〕It is uncertain who will come.(谁要来还不确定。

) 〔It为who will come的形式主语〕It 作形式主语的常见句型：①It + be + 形容词+ to do sth. / doing / that ….e.g. It is very important to learn a foreign language.(学一门外语非常重要。

)It is useless crying over the spilt milk.(覆水难收。

)It was really surprising that she married a man like that.(她嫁给那样的男士真让人惊讶。

)②It + be +名词词组+ doing / that ….e.g. It is no good telling lies.(撒谎没好处。

)It is a pity that you didn’t go to see the film yesterda y.(你昨天没看成那部电影真遗憾。

it作形式主语和形式宾语一、it作形式主语：当不定式（短语）、动名词（短语）或从句在某个句子中作主语时，为保持句子结构前后平衡，避免头重脚轻，因此常用it作形式主语置于句首，而将真正的主语放在句尾。

此时it只起先行引导作用，本身无词义。

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：如：It is everyone’s duty to obey the law.遵守法律是每个人的义务。

It 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 took them a year to build the bridge.建这座桥花了他们一年的时间。

It is bad manners to stare at people.瞪着眼睛看人是不礼貌的。

It is up to us to help those in need.帮助那些有困难的人是我们的责任。

eg. It’s important for us to learn English well.学好英语对我们来说是重要的。

It’s kind of you to help me.感谢你对我的帮助。

⒉ it代替动名词短语：It’s no good/use/useless/a waste of time doing sth.做某事没有用/浪费时间①It is no good/ use having a car if you can’t drive.如果你不会开车，有车也没用。

②It is a waste of time watching TV.看电视是浪费时间。

（it作形式主语,代替动名词短语watching TV）⒊ it代替主语从句：这个主语从句可以用连词that引导，也可以用连接代词或连接副词引导。

如：①It was clear that they had no desire for peace.很清楚他们没有和平的诚意。

“It”作形式主语和形式宾语“It”作形式主语和形式宾语的用法详解It作形式主语和形式宾语用法，是英语学习的主要语法项目之一。

无论是单项选择，还是完行填空，it 用法始终是反复考查的重、热点之一。

现将it在特殊句型中作形式主语和形式宾语用法，进行如下归纳分析，以供学习参考。

一、It 用作形式主语当不定式（短语）、动名词（短语）或从句在某个句子中作主语时，为保持句子结构前后平衡，避免头重脚轻，因此常用it作形式主语置于句首，而将真正的主语放在句尾。

此时it只起先行引导作用，本身无词义。

e.g. It is wrong to tell a lie. (说谎是错误的。

) 〔It为to tell a lie的形式主语〕It is no use arguing about it. (争吵是没用的。

) 〔It为arguing about it的形式主语〕It is uncertain who will come. (谁要来还不确定。

) 〔It为who will come的形式主语〕It 作形式主语的常见句型：①It + be + 形容词+ to do sth. / doing / that ….e.g. It is very important to learn a foreign language. (学一门外语非常重要。

)It is useless crying over the spilt milk. (覆水难收。

)It was really surprising that she married a man like that.(她嫁给那样的男士真让人惊讶。

)②It + be +名词词组+ doing / that ….e.g. It is no good telling lies. (撒谎没好处。

)It is a pity that you didn’t go to see the film yesterday. (你昨天没看成那部电影真遗憾。

“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。

英语中it用法全解析摘要本文主要介绍了英语中it的用法，包括以下几个方面：it作为人称代词，指代前文提到的或语境中明确的人或物。

it作为非人称代词，表示天气、时间、温度、距离等抽象概念。

it作为形式主语或形式宾语，代替不定式、动名词或从句等真正的主语或宾语。

it用于强调句型，突出句子中的某一成分。

it用于其他常见的句式和短语，表达不同的意思和功能。

1. it作为人称代词it作为人称代词，通常指代前文提到的或语境中明确的人或物。

它在句中可以作主语、宾语、定语或表语等。

例如：句子说明He took a quick look at the house and noticed it was veryold.it指代前文提到的house，作主语。

John hates children, and it is difficult to say why.it指代前面提到的事情，作主语。

She made it clear (that) we were not welcome.it作形式宾语，真正的宾语是that引导的从句。

It's me.it作形式主语，真正的主语是me。

2. it作为非人称代词it作为非人称代词，表示天气、时间、温度、距离等抽象概念。

它在句中通常作主语或宾语。

例如：句子说明It is raining.it表示天气，作主语。

It is an hour's walk from my home to the school.it表示距离，作主语。

It is a pity that I didn't think of it earlier.it表示一般情况，作主语。

I don't like it when you are angry.it指代后面的when引导的从句，作宾语。

3. it作为形式主语或形式宾语当不定式、动名词或从句等用作主语或宾语时，为避免头重脚轻或保持句子平衡，通常在句首使用形式主语或形式宾语it，而把真正的主语或宾语置于句尾。

“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。

“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。