it做形式主语用法大全含练习及答案
it做形式主语时的用法
it做形式主语时的用法It作为形式主语时，常常用于代替后面真实主语的从句、动名词或不定式，以避免句子结构显得过于复杂或者不平衡。
以下是It 作为形式主语的几种常见用法：1、It + be + 形容词 + that从句：这种句型中的形容词通常是表示性格、品质的形容词，如nice、kind、stupid等。
例如：It is kind of you to help me. 你真好，帮了我。
2、It + be + 名词 + that从句：这种句型中的名词通常是表示时间、距离、度量衡等概念的名词。
例如：It is five years since we last met. 我们上次见面已经五年了。
3、It + be + 介词短语/副词 + that从句：这种句型中的介词短语或副词通常用来描述地点、方式等。
例如：It is in this room that we had the party. 我们就是在这个房间里开派对的。
4、It + be + 动词的过去分词 + that从句：这种句型中的动词过去分词通常是表示完成的动词，如known、heard、seen等。
例如：It is said that he has gone abroad. 据说他已经出国了。
5、It + be + 不定式短语/动名词 + that从句：这种句型中的不定式短语或动名词通常用来描述将来的动作或一般性的情况。
例如：It is to study hard that he will succeed. 他只有努力学习才会成功。
需要注意的是，在It作为形式主语的句子中，真正的主语通常是一个从句或非谓语动词短语，这些从句或短语被放在句子的后面，以保持句子的平衡和流畅。
it作形式主语和形式宾语练习.docx
浅谈it作形式主语和形式宾语用法一、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。
）（Il 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・It is useless crying over the spilt milk・（覆水难H攵。
）It was really surprising that she married a man like that.②It + be 4-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・③It + be +过去分词+ that....该句型常见动词冇：say, hope, think, suppose, expect, report, know, believe, decide, etc.e.g. It is said that they have invented a new type of computer.It is believed that China will become one of the strongest countries in the world・It was reported that more than 170 thousand people died in the 2004 tsunami.④It + seems / appears / happens 等不及物动词+ that....e.g・ Il seems that he enjoys pop songs very much・It appears that Tom might change his mind.⑤若句子是疑问形式，就只能用it作形式主语。
高考英语语法填空代词it的用法练习题30题
高考英语语法填空代词it的用法练习题30题1.It is important for us to learn English well.A.thatB.thisC.whatD.which答案：A。
本题考查it 作形式主语的用法。
“It is+形容词+for sb to do sth”是固定句型，it 作形式主语，真正的主语是后面的不定式短语“to learn English well”。
选项B“this”、C“what”、D“which”均不能在此处作形式主语。
2.We think it necessary to do exercise every day.A.thatB.thisC.whatD.which答案：A。
本题考查it 作形式宾语的用法。
“think it+形容词+to do sth”是固定句型，it 作形式宾语，真正的宾语是后面的不定式短语“to do exercise every day”。
选项B“this”、C“what”、D“which”均不能在此处作形式宾语。
3.It is said that he is very good at math.A.thatB.thisC.whatD.which答案：A。
本题考查it 作形式主语的用法。
“It is said that+句子”是固定句型，it 作形式主语，真正的主语是后面的that 引导的主语从句。
选项B“this”、C“what”、D“which”均不能在此处作形式主语。
4.We make it a rule to get up early.A.thatB.thisC.whatD.which答案：A。
本题考查it 作形式宾语的用法。
“make it a rule to do sth”是固定句型，it 作形式宾语，真正的宾语是后面的不定式短语“to get up early”。
选项B“this”、C“what”、D“which”均不能在此处作形式宾语。
初二英语形式主语和形式宾语练习题40题含答案解析
初二英语形式主语和形式宾语练习题40题含答案解析1.It's important for us to study hard.A.for usB.to usC.of usD.with us答案解析：A。
本句中it 是形式主语，真正的主语是to study hard。
“It's important for sb to do sth”是固定句型，表示“对某人来说做某事很重要”，所以用for us。
B 选项to us 没有这样的用法；C 选项“of us”一般用于“it's+形容词+of sb to do sth”句型，表示某人的品质等；D 选项with us 也没有类似用法。
2.It's necessary to finish our homework on time.A.to finishB.finishingC.finishD.finished答案解析：A。
“It's necessary to do sth”是固定句型，it 是形式主语，真正的主语是to finish our homework on time。
B 选项finishing 不能直接用在这个句型中；C 选项finish 是动词原形，在这个句型中不能直接用；D 选项finished 是过去分词，也不符合这个句型要求。
3.It's fun to play basketball after school.A.to playB.playingC.playD.plays答案解析：A。
“It's fun to do sth”是固定句型，it 是形式主语，真正的主语是to play basketball after school。
B 选项playing 不能直接用在这个句型中；C 选项play 是动词原形，在这个句型中不能直接用；D 选项plays 是第三人称单数形式，也不符合这个句型要求。
4.It's kind of you to help me.A.of youB.for youC.to youD.with you答案解析：A。
高考英语语法填空代词it的用法练习题40题含答案解析
高考英语语法填空代词it的用法练习题40题含答案解析1.It's very kind of you to help me. “It” in this sentence refers to _____.A.helping meB.youC.meD.kindness答案解析：B。
在这个句子中“it”作形式主语，真正的主语是“to help me”，“it”指代“you”。
A 选项“helping me”是真正主语的内容；C 选项“me”是“help”的对象；D 选项“kindness”与句子中的“it”无关。
2.I found it difficult to learn English. “It” in this sentence refers to _____.A.learning EnglishB.EnglishC.ID.difficult答案解析：A。
此句中“it”作形式宾语，真正的宾语是“to learn English”，“it”指代“learning English”。
B 选项“English”只是学习的对象；C 选项“I”是句子的主语；D 选项“difficult”是形容词，与“it”无关。
3.It is raining outside. “It” in this sentence refers to _____.A.outsideB.rainingC.weatherD.time答案解析：B。
这句话中“it”用来指代天气状况，具体是“raining”。
A 选项“outside”是地点；C 选项“weather”太宽泛；D 选项“time”与句子意思不符。
4.It seems that he is very busy. “It” in this sentence refers to _____.A.heB.busyC.seemsD.the situation答案解析：D。
此句中“it”作形式主语，指代后面“he is very busy”这个情况。
It作形式主语和形式宾语的用法点拨 (同步练习)
（答题时间: 20分钟）一、单项选择1.Jane, I told you I don’t like ________ when you go out with your friends every night.A.thatB.thisC.itD./2.Sometimes he found ________ very hard to fall asleep at night, so he went to see the doctor.A.himB.thisC.thatD.it3.—Who is making such a noise?—________ must be the children.A.ItB.TheyC.HeD.You4.From Mum’s love, patience and understanding, I have learned what a huge responsibility ________ is to raise a child.A.thisB.thatC.itD.one5.News services make ________ for newspapers to give their readers news from around the world.A.it is possibleB.it possibleC.possibleD.possible that二、完形填空:I consider myself something of an expert on apologies.A quick temper has 1me with plenty of opportunities to make them.In one of my earlier 2, my mother was telling me “Don’t watch the 3when you say, ‘I’m sorry’.Hold your head up and look at the person in the 4, so he’ll know you 5it.”My mother thus made the key point of a(n) 6apology: It must be direct.You must never 7to be doing something else.You do not 8 a pile of letters while apologizing to a person 9in position after blaming him or her for a mistake that turned out to be your10.You do not apologize to a hostess, whose guest of honor you treat 11, by sending flowers the next day without mentioning your bad 12.One of the important things we should do for an 13apology is a readiness to 14the responsibility for our careless mistakes.We are used to making excuses, which leaves no 15for the other person to 16us.Since most people are open-hearted, the no-excuse apology leaves both parties feeling 17about themselves.That, after all, is the 18of every apology.It 19little whether the apologizer is wholly or only partly at fault.Answering for one’s 20encourages others to take their share of the blame.1.A.provided B.mixed pared D.treated2.A.dreams B.courses C.memories D.ideas3.A.side B.ground C.wall D.bottom4.A.mind B.soul C.face D.eye5.A.imagine B.enjoy C.mean D.regreteful B.successful C.equal D.basic7.A.pretend B.forget C.refuse D.expect8.A.hold on B.put away C.look through D.pick up9.A.poorer B.weaker C.worse D.lower10.A.fault B.reason C.result D.duty11.A.cruelly B.freely C.roughly D.foolishly12.A.manners B.excuses C.efforts D.roles13.A.active B.effective C.extra D.easy14.A.raise B.perform C.admit D.bear15.A.situation B.need C.sign D.room16.A.advise B.forgive C.warn D.blame17.A.wiser B.warmer C.better D.cleverer18.A.purpose B.method C.end D.advantage19.A.cares B.matters C.depends D.remains20.A.facts B.states C.rightsD.actions三、语法填空阅读下列短文, 掌握其大意, 并根据上下文填写空白处所需的内容(限1个单词)或所提供单词的正确形式。
高考英语语法填空代词it的用法练习题30题
高考英语语法填空代词it的用法练习题30题1.It is important to learn English well.A.thatB.thisC.oneD.what答案解析：A。
本题考查it 作形式主语，真正的主语是to learn English well。
that 引导的主语从句后置，this、one、what 都不能在此处作形式主语。
2.We think it necessary to study hard.A.thatB.thisC.oneD.what答案解析：A。
本题考查it 作形式宾语，真正的宾语是to study hard。
that 引导的宾语从句后置，this、one、what 都不能在此处作形式宾语。
3.It is known to all that the earth is round.A.thatB.thisC.oneD.what答案解析：A。
本题考查it 作形式主语，真正的主语是that the earth is round。
that 引导的主语从句后置，this、one、what 都不能在此处作形式主语。
4.We find it difficult to learn a foreign language.A.thatB.thisC.oneD.what答案解析：A。
本题考查it 作形式宾语，真正的宾语是to learn a foreign language。
that 引导的宾语从句后置，this、one、what 都不能在此处作形式宾语。
5.It is said that he is a good student.A.thatB.thisC.oneD.what答案解析：A。
本题考查it 作形式主语，真正的主语是that he is a good student。
that 引导的主语从句后置，this、one、what 都不能在此处作形式主语。
6.We believe it true that he has passed the exam.A.thatB.thisD.what答案解析：A。
初二英语形式主语和形式宾语练习题40题含答案解析
初二英语形式主语和形式宾语练习题40题含答案解析1.It's important for us to learn English well.A.for usB.of usC.to usD.with us答案解析：A。
本题考查形式主语it 的用法。
It's+形容词+for sb to do sth 是固定句型，其中it 是形式主语，真正的主语是后面的动词不定式to learn English well。
for sb 表示对某人来说，of sb 一般用在形容词是表示人的品质的情况下，to us 和with us 不符合这个句型。
2.It's very kind of you to help me.A.of youB.for youC.to youD.with you答案解析：A。
本题考查形式主语it 的用法。
It's+形容词+of sb to do sth 也是固定句型，其中it 是形式主语，真正的主语是后面的动词不定式to help me。
of sb 表示某人具有某种品质，for sb 表示对某人来说，to you 和with you 不符合这个句型。
3.It takes me an hour to do my homework every day.A.meB.himC.herD.them答案解析：A。
本题考查形式主语it 的用法。
It takes sb some time to do sth 是固定句型，其中it 是形式主语，真正的主语是后面的动词不定式to do my homework every day。
takes 后面跟宾格，根据句子的主语是me，所以这里也用me。
him、her、them 不符合语境。
4.It's necessary that we study hard.A.that weB.for weC.to weD.with we答案解析：A。
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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。
某人和这些形容词可以构成主系表结构。
如：It’s very kind of you to help me with the work.=You are kind to help me.It seemed selfish of him not to share his dictionary with others.=He seemed selfish not to share his dictionary with others.7. It + be +名词词组+ 动词不定式，如：It is not a good habit to stay up too late.8. It + be + 名词或形容词+ 动名词，这类名词和形容词常常是：good, no good, no use, a waste of, useless, senseless等，如：It’s a waste of time talking to her any more.It is no use arguing about the matter with him.9. It + take ( sb. )+ 时间（金钱）+ 动词不定式，如：It took the workers almost three years to finish building the dam.It will take a whole day to get to the top of the mountain on foot.实战演练：1. It is generally considered unwise to give a child he or she wants. (NMET 1997)A. howeverB. whateverC. whicheverD. whenever2. In fact is a hard job for the police to keep order in an important football match. (2001 上海)A. thisB. thatC. thereD. it3. is a fact that English is being accepted as an international language. (NMET1995)A. ThereB. ThisC. ThatD. It4. Is necessary to take off our shoes when we enter the lab? (MET88)A. everyoneB. thisC. herD. it5. ________ will take you a lot of time to find him in the crowd.A. ItB. IC. WeD. They6. It is no use his _________ there, the situation is hopeless now.A. to goB. to be goingC. goingD. having gone7. It is never too late to learn, ________?A. is itB. isn’t itC. does itD. doesn’t it8. ___________ is known to all that Shenzhou VI Launched Successfully.A. AsB. WhatC. ItD. That9. _______ is reported in the newspaper, the Earthquake in east China's Jiangxi Province killed 13 peopleA. ItB. AsC. ThatD. What10. ___________ certain that his invention will make people’s life convenient.A. That’sB. This isC. It’sD. What’s11. _________ that there is another football match on the air this evening.A. It saysB. It was saidC. It is saidD. What was said12. __________ that their daughter got an opportunity to study abroad.A. It’s a exciting newsB. This is an exciting newsC. This is exiting newsD. It’s exciting news参考答案：1——5 BDDDA 6——10CACAC 11——12CD㈠ it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。
⒈it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）◆It be + 形容词+ for sb. to do sth.与It be + 形容词+of sb. to do sth.：如果句型中的形容词描述的是sb.的品质、品格，在逻辑上可以作sb.的表语，则sb.前应用介词of，否则就用for。
①It’s necessary for us to use a short-wave radio to pick up the programmes.我们用一台短波收音机收听这些节目是必要的。
③It’s kind of you to help me.感谢你对我的帮助。
（= You are kind to help me. ）④It was foolish of him to give up the job.他放弃那工作是愚蠢的。
（= He was foolish to give up the job⒉it代替动名词短语：动名词作主语用后置形式的情况远不及不定式那么普遍，常限于no good, no use, useless, waste等词的后面。
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。
( it作形式主语,代替动名词短语having a car)②It is a waste of time watching TV.看电视是浪费时间。