it做形式主语用法大全含练习及答案
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。
(完整版)it做形式主语用法大全含练习及问题详解
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。
七年级英语It 作形式主语单选80题(含答案)
七年级英语It 作形式主语单选80题(含答案)1.It is seven o'clock. Time to go to school.A.thatB.thisC.itD.now答案：D。
本题考查时间表达法。
It is seven o'clock.表示现在是七点钟，Time to go to school.意思是该去上学了。
选项A“that”一般不用于时间表达；选项B“this”一般用于近指，也不用于时间表达；选项C“it”在此处重复；选项D“now”表示现在，符合语境。
2.It is time for lunch at twelve o'clock.A.atB.inC.onD./答案：D。
本题考查时间表达法。
It is time for lunch at twelve o'clock.表示十二点是吃午饭的时间。
在“at twelve o'clock”这个短语中，不需要再加其他介词。
选项A“at”多余；选项B“in”一般用于较长时间范围；选项C“on”用于具体日期。
3.It is six in the morning. Time to get up.A.thatB.thisC.itD.now答案：D。
本题考查时间表达法。
It is six in the morning.表示现在是早上六点，Time to get up.意思是该起床了。
选项A“that”一般不用于时间表达；选项B“this”一般用于近指，也不用于时间表达；选项C“it”在此处重复；选项D“now”表示现在，符合语境。
4.It is nine at night. Time to go to bed.A.thatB.thisC.itD.now答案：D。
本题考查时间表达法。
It is nine at night.表示现在是晚上九点，Time to go to bed.意思是该睡觉了。
选项A“that”一般不用于时间表达；选项B“this”一般用于近指，也不用于时间表达；选项C“it”在此处重复；选项D“now”表示现在，符合语境。
it用法大全形式宾语形式主语
2.非人称代词it
it有时并不指详细旳东西，而泛指天气、时间、环境等， 称为非人称旳it： 2.1.指天气： It is a lovely day, isn’t it? It is a bit windy.
2.2.指时间: It was nearly midnight when she came back.
用It作形式主语旳句型： (1) It is adj.＋ to do sth. It is difficult to translate this article.翻译这篇文章 极难。
(2) It is adj. ＋ for/of sb.＋ to do sth. It is important for us to learn English.学习英语对我 们很主要。
㈠ 1.it作人称代词
1.1.it旳最基本使用方法是作人称代词，主要指刚 提到 旳事物，以防止反复:
Ningbo is a beautiful city, isn’t it?
1.2.也能够指动物或婴儿(未知性别旳婴儿或孩子): Is this your dog？No, it isn’t.
1.3.也可指抽象事物: It was a great surprise to me when he did a thing like that．
2）.It is +v-ed +that 从句 ① It is said (reported， learned....) that ...
据说（据报道，据悉．．．）“。 It is said that he has come to Beijing.
= He is said to have come to Beijing.
②不论被强调部分是哪种状语，只能用 that连接，不得使用where、when等连词.
七年级英语It 作形式主语练习30题答案解析版
七年级英语It 作形式主语练习30题答案解析版1. ______ important for students to study hard at school.A. It isB. This isC. That isD. There is答案解析：A。
在这个句子中，It作形式主语，真正的主语是“to study hard at school”，这种结构“It is + adj. + (for sb.) to do sth.”是英语中的常见用法，表示“（ 对某人来说）做某事是怎样的”。
选项B“This”通常用来指代近处的事物或概念，不能作形式主语。
选项C“That”可引导从句等，但不能作这种结构中的形式主语。
选项D“There is”表示“有”，与句子表达的语义不符。
2. In our family, ______ a good habit to get up early.A. it isB. this isC. that isD. he is答案解析：A。
这里It作形式主语，真正的主语是“to get up early”。
表示在我们家庭里，早起是一个好习惯。
选项B“This”不能作形式主语。
选项C“That”同样不能作这种句子结构中的形式主语。
选项D“He”是人称代词，指人，与句子表达的早起是个好习惯的语义不符。
3. ______ interesting for me to play football with my friends.B. There isC. What isD. Which is答案解析：A。
It在句中作形式主语，真正的主语是“to play football with my friends”，“It is + adj. + (for sb.) to do sth.”结构表示对我来说和朋友踢足球是有趣的。
选项B“There is”表示存在，与句子语义不同。
选项C“What is”通常用于疑问句中，询问是什么，不适合此处。
七年级英语It 作形式主语练习30题含答案解析
七年级英语It 作形式主语练习30题含答案解析1. _______ difficult for me to play the piano well in a short time.A. It isB. This isC. That isD. I'm答案解析：A。
在这个句子中，It作形式主语，真正的主语是后面的“to play the piano well in a short time”，这种结构是“It is + adj. + (for sb.) to do sth.”，表示做某事对某人来说是怎么样的。
选项B“This is”和选项C“That is”没有这种用法，不能作形式主语。
选项D“I'm”表示“我是”，不符合句子结构和语义。
2. _______ a lot of time to go to school on foot every day.A. It takes meB. It spends meC. I takeD. I spend答案解析：A。
这里考查“It takes sb. some time to do sth.”这个句型，It作形式主语，表示花费某人多少时间做某事。
选项B中“spend”的主语应该是人，用法是“sb. spend some time (in) doing sth.”，所以该选项错误。
选项C和D的主语是I，不符合这个句型的结构要求。
3. _______ important to keep our classroom clean.A. ItB. ThatC. ThisD. They答案解析：A。
此句运用的是“It is + adj. + to do sth.”结构，It作形式主语，真正的主语是“to keep our classroom clean”。
选项B“That”、选项C“This”和选项D“They”都不能在这种结构中作形式主语。
4. _______ interesting for my sister to draw pictures.A. It'sB. ItsC. That'sD. She's答案解析：A。
高一英语名词性从句中it作形式主语练习题30题含答案解析
高一英语名词性从句中it作形式主语练习题30题含答案解析1. ____ is important that we should learn English well.A. ItB. ThatC. ThisD. What答案：A。
解析：在这个句子中，it作形式主语，真正的主语是that引导的从句“that we should learn English well”，这种结构是为了避免句子头重脚轻。
这里的名词性从句是主语从句，that在主语从句中不充当任何成分，只起连接作用。
2. ____ seems that he doesn't like the book.A. ItB. ThatC. HeD. Which答案：A。
解析：此句中it作形式主语，真正的主语是“that he doesn't like the book”这个主语从句。
seem是系动词，it seems that...是一个常用的结构，表示“似乎，好像”。
3. ____ is a pity that you missed the party.A. ItB. ThatC. ThereD. What答案：A。
解析：这里it作形式主语，“that you missed the party”是真正的主语，是主语从句。
it在句中的功能是使句子结构平衡，避免主语过长。
4. ____ is necessary to tell her the truth.A. ItB. ThatC. ThisD. One答案：A。
解析：it在这个句子中作形式主语，真正的主语是“to tell her the truth”这个不定式短语，在语法上等同于一个主语从句。
这种用法是为了让句子结构更加清晰，it起到了平衡句子结构的作用。
5. ____ is uncertain whether he will come or not.A. ItB. ThatC. ThisD. What答案：A。
高一英语名词性从句中it作形式主语练习题20题含答案解析
高一英语名词性从句中it作形式主语练习题20题含答案解析1.It is important that we study hard.A.thatB.whatC.whichD.when答案解析：A。
“It is important that...”是固定句型，其中it 作形式主语，真正的主语是that 引导的主语从句。
B 选项what 一般引导名词性从句并在从句中充当成分；C 选项which 一般引导定语从句；D 选项when 一般引导时间状语从句。
2.It is known to all that the earth is round.A.thatB.whatC.whichD.who答案解析：A。
“It is known to all that...”是固定句型，it 作形式主语，真正的主语是that 引导的主语从句。
B 选项what 一般引导名词性从句并在从句中充当成分；C 选项which 一般引导定语从句；D 选项who 一般引导定语从句且指人。
3.It is said that he is a good student.A.thatB.whatC.whichD.when答案解析：A。
“It is said that...”是固定句型，it 作形式主语，真正的主语是that 引导的主语从句。
B 选项what 一般引导名词性从句并在从句中充当成分；C 选项which 一般引导定语从句；D 选项when 一般引导时间状语从句。
4.It is reported that a new bridge will be built.A.thatB.whatC.whichD.when答案解析：A。
“It is reported that...”是固定句型，it 作形式主语，真正的主语是that 引导的主语从句。
B 选项what 一般引导名词性从句并在从句中充当成分；C 选项which 一般引导定语从句；D 选项when 一般引导时间状语从句。
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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。