it 作形式主语和形式宾语完成句子练习
it的用法和练习带答案
重点代词it的用法和练习（含答案）(1)it用做人称代词的用法it用作代词，意为“它”，既可以指人，也可以指物。
it做人称代词，可以用来代替一个名词、短语、从句或句子，以避免他们在句中的重复。
这是可以指提到过的，也可以指未提到的，在句中做主语、表语和宾语。
1)指事物，it可以知道除人以外的任何事物或动物。
I dropped my watch and it broke.我把手表掉在地上摔坏了。
2)指人，it主用用于指性别不明的婴儿或只听其声不见其人的人，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.“Listen. Someone is crying..”“Oh, it must be Mary.”3）代替某些代词。
代词it可以用于代替指示代词this, that以及复合不定代词something, anything, nothing等，如：“What’s this?”“It’s a new machine”(2)it用作非人称代词的用法1)it用作非人称代词主要用来指时间、距离、价值、天气、气温及温度等自然现象。
如It’s too late to go there now.现在去那已经太迟了。
It rained all day yesterday.昨天下了一整天雨。
2)用于某些句型。
It’s time for sth. 该做某事了。
It’s to do sth. 是时候该做某事了。
It’s time for sb to do sth. 某人该干某事了。
It’s (about/high) time +that--从句。
某人该做某事了。
（从句谓语用过去式，有时候用should+动词原形）It’s first(second)time +that--从句。
某人第几次干某事。
（从句谓语动词用现在完成时）It’s +时间段+since从句。
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。
英语学考专题复习it作形式主语和形式宾语用法
高二学考专题复习之“it”学习目标：1.了解it作为形式主语和形式宾语的用法2.熟记it做形式主语和形式宾语的几种句型3.能运用it相关句型完成相应练习学习重难点：熟记it做形式主宾语的句型并能熟练运用一、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. 〔It为to tell a lie的形式主语〕It is no use arguing about it.〔It为arguing about it的形式主语〕It is uncertain who will come.〔It为who will come的形式主语〕It 作形式主语的常见句型：常见形容词:important, easy, difficult, possible, wise…e.g. It is very important to learn a foreign language.It is useless crying over the spilt milk. (覆水难收。
)It was really surprising that she married a man like that.② It + be +名词词组+ doing / that ….★写出中文意思并熟记：It is a pity that you didn’t go to see the film yesterday.It is a truth that there would be no new China without the Communist Party（共产党）.③ It + be + 过去分词+ th at ….该句型常见动词有：say, hope, think, suppose, expect, report, know, believe, decide, etc.★写出下列短语的中文意思并熟记：e.g. It is said that they have invented a new type of computer.It was reported that more than 170 thousand people died in the 2004 tsunami.④ It + seems / appears / happens等不及物动词+ that ….★写出下列短语的中文意思并熟记：It appears that Tom might change his mind.这是一个表示“（某人）花多少时间/金钱干某事”的句型，其中it是形式主语，代替后面的不定式（to do sth.），句型中的sb.也可以省略。
it作形式主语和形式宾语
2. It is no good/use/harm doing sth. It is no use making any complaints about it. It is no good talking to him.
不定式；动名词；that从句作真正的主语。
3. It seems/ appears +adj./n + to do that 从句 It seems wise for us not to expect too much of him. It appears all right to tell him everything about it. It seems true that he will take the place of Mr. Li. 4. It seems / appears (to sb.) that… It seems to me that he doesn’t know anything about it.
8. 他竟然那样举止不当, 似乎很奇怪. It seemed strange that he should have behaved like that. 9. 那天晚上他恰巧在那里. It happened that he was there that evening. 10. 谁赢得这次竞选和我关系不大. It’ll make no differection. 11. 他是否来都没关系. It doesn’t matter whether he will come or not.
5. It happened that It happened that I had no money on me. 6. It makes no difference / doesn’t matter to sb. + wh-从句 It won’t make much difference to me which side may win or lose. It doesn’t matter to him whether you will put off the meeting. 7. It is said/reported/ believed that…
(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。
初二英语形式主语和形式宾语练习题40题(带答案)
初二英语形式主语和形式宾语练习题40题(带答案)1. ____ is important for us to learn English well.A. ThisB. ThatC. ItD. One答案解析：C。
在这个句子中，“it”是形式主语，真正的主语是“to learn English well”。
使用形式主语“it”是为了避免句子头重脚轻。
选项A“this”和选项B“that”不能用作形式主语。
选项D“one”表示“一个”，也不能作形式主语。
2. ____ seems that he is very happy today.A. ItB. ThisC. ThatD. He答案解析：A。
“it seems that...”是一个常用的句型，其中“it”是形式主语，表示“看起来......”。
选项B“this”和选项C“that”没有这种用法。
选项D“he”如果放在这里句子结构和语义都不正确。
3. ____ is necessary to protect the environment.A. ThereB. ItC. WhatD. Which答案解析：B。
这里“it”作形式主语，真正的主语是“to protect the environment”。
选项A“there”通常用于“there be”句型，表示“有”，与本题用法不同。
选项C“what”和选项D“which”不能作形式主语。
4. ____ took me an hour to finish my homework.A. ItB. ThisC. ThatD. One答案解析：A。
“it takes/took sb. some time to do sth.”是一个固定句型，其中“it”为形式主语，真正的主语是“to finish my homework”。
选项B“this”、选项C“that”和选项D“one”都不符合这个句型的要求。
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。
it作形式主语和形式宾语
I think it difficult to learn written Chinese．
5. It happened that
It happened that I had no money on me.
6. It makes no difference / doesn’t matter to sb. + wh-从句
It won’t make much difference to me which side may win or lose.
It is a pity that he is not able to join us.
2. It is no good/use/harm doing sth. It is no use making any complaints about it. It is no good talking to him.
It 作形式主语 1)It is +adj./ n. + (for / of sb.) to do sth.
that 从句 It is wrong of you to say anything like that in
that occasion. It is easy for him to lose temper.
I consider it a shame that we have lost the game.
用以上2个句型造句. 1.我认为他几乎每晚都出去散步是很奇怪的.
It用法练习题及答案
It的用法It的用法在高考中也是重现率较高的语言点，尤其是it用于强调句。
其考查方式多通过“单项填空”进行，偶尔也出现在“短文改错”和“完形填空”中。
一、要点点拔1．代替上文中提到过的人或事物。
指代人时，一般用于小孩或身份不十分明朗的人。
1) －Who is the baby?－It‘s my teacher’s son．2) －Who is that gentleman?－It's my friend Tom．He(不可用It) wants to see you．2．用于表达天气、环境、时间、距离、季节等。
例如：1) It’s half an hour’s walk from here to our school．2) It‘s nice and warm here．3) But it's two o'clock now, and it's time for us to go to school．3．用作形式主语.it 没有具体意义，而只是帮助把真正的主语移至句子后尾，使句子显得平稳一些，能借it 给移至句子后尾的主语有三种：一种由不定式表示，一种由动名词表示，一种由从句表示。
1).It 替代真正的主语——动词不定式短语.It is easier to say than to do .It is a good act to help the others.2).it 替代真正的主语——动名词短语,以动名词短语做主语的句子，主要在以no good, no use, no harm, dangerous, foolish 等词作表语的句中.It’s no harm drinking running water in that area。
It’s foolish talking like that.3).it 替代从句作主语，用从句做主语的带it 的句子很多,常见的有下面几类：①It is a pity (a shame ,a fact ,a wonder ,a good thing,etc. )that…It is a shame that he didn’t pass the exam.②It is strange ( surprising,obvious ,true, good,possible,clear,etc. ) that…。
it-形式主语练习
It作形式主语、形式宾语练习题1.is interesting to watch children play games.2.is interesting is to watch children play games.3.It was two o’clock this morning the special train arrived here.4.It was at two o’clock this morning the special train arrived here.5.is difficult to persuade her to stay.6.is difficult is to persuade her to stay.7.It is my turn the blackboard.8.It is very polite not loudly in public.9.If you want help, money or anything, let me know, you?10.It is said that it is going to be fine tomorrow. Let’s go camping, we?11.you did? No, in fact I did not need to.A Is that whatB Is what thatC What is thatD Is what12.It depend on he has enough money.13.the sports meet will be held depends on the weather.14.is known to us all is that the sun rises in the east.15.is known to us all that the sun rises in the east.16.is known to us all, the sun rises in the east.17.It was said was all that he had said.18.It was quite true the teacher said moved us to tears.19.It is pretty well understood controls the flow of carbon dioxide in and out the atmosphere today.20.It is pretty well understood the earth goes around the sun.21. I was disappointed with the play. I had expected to be much better.A. thatB. thisC. oneD. it22. I think _______ right that you did not tell him the bad news.A. itB. itsC. youD. That23. He felt ______ to work for human rights and progress.A. it his dutyB. his dutyC. that is a dutyD. that is his duty24. People in the west makes ______ a rule to buy Christmas presents for their relatives and friends.A. thatB. itC. thisD. The thing25. It was in the village ______ now is a small town ________ the earthquake occurred.A. where, whichB. which, whereC. which, thatD. that, where26. Will you see to ______ that the luggage is brought back?A. meB. yourselfC. itD. them27.It _______ that she has lost interest in studying English.A. seemedB. appearsC. looksD. remains28._______ happened that I met one of my friends yesterday.A. IB. ThatC. ItD. How29.I think _______ right that you did not tell him the bad news.A. itB. itsC. youD. that30. _______ to say which one I should choose.A. That’s hardB. It is hardC. There no useD. It no goodE.g. I don’t have a spare ticket. I can’t take you to the concert.If I had a spare ticket, I could/would take you to the concert.1.She drinks too much coffee. She does not feel calm.2.He can’t type. He is not able to operate a computer.3.They do not understand the problem. They won’t find a solution.If I were ......, I would do ......E.g. If I were in Jane’s position, I would look for a new job.1.She is not in your position. She is not able to advise you.2.I am in a hurry. I will not stay to dinner.3.He’s not a millionaire. He will not buy you a palace.4.The weather is not sunny. We will not stay indoors.If+从句过去时+主句情态动词E.g. If he knew the facts, he might tell us what to do. (certainty)If he knew the facts, he might tell us what to do. (possibility)If he knew the facts, he should tell us what to do. (necessity)1.If she here now, she give us some advice.2.If you (can play) a musical instrument, he (think) about another career.3.If Susan (borrow) your book, she (return) it.4. If Frank (want) advice, he (ask) his bank manager.E.g. John ate too much birthday cake, so he was sick.If John had not eaten too birthday cake, he would have been sick.1.We came home from our holiday early because we ran out of money.2.The men were wearing protective clothing, so they were all quite safe.3.4.I was sweating because it was so hot.4.My father did not earn much money, so life was not easy for us.If+过去完成时+情态动词E.g. If he had not known the fact, he would have told us what to do. (certainty)If he had not known the fact, he might have told us what to do. (possibility)If he had not known the fact, he could have told us what to do. (necessity) 1.2.If you(not want) to drive straight home, we (miss) all this music.3.4.If the weather forecast (be) different, we (stay) at home.5.She (not hear) the news, if she (not turn on) the radio this morning.6.7.They (play) better, if they (have) more training.。
it做形式主语用法大全含练习及答案
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。
初二英语形式主语和形式宾语练习题50题
初二英语形式主语和形式宾语练习题50题1.It is important for us to learn English well.A.for usB.to learnC.English wellD.important答案：D。
本题中“it”作形式主语，真正的主语是“to learn English well”。
选项A“for us”是“对我们来说”，在句中作状语；选项B“to learn”是动词不定式，是真正的主语的一部分；选项C“English well”不是句子的主语。
只有选项D“important”是表语，与“it is”构成“it is+形容词+for sb to do sth”的结构，其中“it”作形式主语。
2.It is difficult to solve this problem.A.to solveB.this problemC.difficultD.is答案：C。
这里“it”是形式主语，真正的主语是“to solve this problem”。
选项A“to solve”是动词不定式，是真正主语的一部分；选项B“this problem”是真正主语中动词的宾语；选项D“is”是系动词。
只有选项C“difficult”是表语，与“it is”构成“it is+形容词+to do sth”的结构，“it”作形式主语。
3.It is necessary that we study hard.A.that we study hardB.necessaryC.we study hardD.is答案：B。
“it”在这里作形式主语，真正的主语是“that we study hard”。
选项A“that we study hard”是真正的主语；选项C“we study hard”是主语从句中的内容；选项D“is”是系动词。
只有选项B“necessary”是表语，与“it is”构成“it is+形容词+that从句”的结构，“it”作形式主语。
It作形式主语和形式宾语的用法点拨 (同步练习)-word
（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 20 encourages others to take their share of the blame.1. A. provided B. mixed C. compared 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. regret6. A. useful 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. rights D. 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。
It”用法及其句型和固定搭配专练
“It"用法及其句型和固定搭配专练”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。
21版：避免头重脚轻的it句型(步步高)
避免头重脚轻的it句型在英语中，为了避免头重脚轻，保持句子平衡，经常运用it作形式主语或形式宾语，而把真正的主语或宾语后置，作真正主语或宾语的常为不定式或从句，有时也可用动名词。
it 有时也可以用在一些固定句型中。
灵活地运用it句式可使文章更高级，结构更紧凑。
一、it作形式主语的常用句型1．It takes (sb.) some time/energy/effort...to do sth.It took the students about two hours to finish cleaning the classroom that day.那天花了同学们大约两个小时才把教室打扫完。
2．It is/was＋名词/形容词＋(of/for sb.) to do sth.Honestly speaking，it’s so nice of you to offer me a class of practical learning skills.说实话，你能给我上一堂实用的学习技巧课真是太好了。
(2019·浙江)It’s indeed a pleasant surprise for me to even rank first in a recent English speech contest.在最近的一次英语演讲比赛中，我竟然名列第一，真是令人惊喜。
(2019·浙江)3．It is/was＋名词/形容词/过去分词＋that...It is true that the Internet plays an important role in our daily life.确实，网络在我们的日常生活中扮演重要的角色。
It’s said that rap music was invented by a classical musician in 1912.据说，说唱音乐是一位古典音乐家在1912年创立的。
单词it用法及练习
单词it用法及练习一、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。
It’s (about / high) time + that-从句. 某人该做某事了。
高考英语语法词汇专项突破：05作为先行词的It作形式主(宾)语及在强调句型中的运用+巩固训练+答案
高考英语语法词汇专项突破：05作为先行词的It作形式主(宾)语及在强调句型中的运用+巩固训练+答案【考点导航】【考例1】（2020·海南·高考真题）These days, it is not unusual for 10-to 12-year-olds to publish their own websites or for second and third graders （begin）computer classes.答案与解析：to begin。
考查非谓语动词及其it作形式主语。
句意：如今，10到12岁的孩子发布自己的网站，二班级和三班级同学开头上计算机课，这些都很常见。
本题考查“It is + adj. + for sb. to do sth.”结构，该结构it作形式主语，真正的主语为不定式。
故填to begin。
【考例2】（2018·天津）It was only when the car pulled up in front of our house __________ we saw Lily in the passenger seat.A. whichB. thatC. whenD. where答案与解析：B。
考查强调句。
这里考查强调句，强调句型结构为：It is/ was +被强调部分(通常是主语、宾语或状语)+ that/ who(当强调主语且主语指人)+其他部分。
本题强调时间状语only when the car pulled up in front of our house。
故选B。
句意：只有当汽车在我们房子前停下来我们才看到在乘客位置的莉莉。
【It重难点及考点设置解读】由于句法结构的需要，常用it作形式主语或形式宾语，而把真正的主语或宾语放后置。
在强调句型中用it构成强调句型结构，用来强调除了谓语动词以外的绝大部分成份。
具体解读如下：考点一、形式主语it当不定式、Ving或从句作主语时，为了避开“头重脚轻”常用it作形式主语，而把真正的主语后置，一般后置的主语可以取代先行it的位置。