it的指代功能点拨(同步练习)
超详细的It的用法归纳总结(附习题及答案)!
超详细的It的用法归纳总结（附习题及答案）！
一、It是代词
指除人以外的一切生物和事物，用来指代时间、季节、天气距离、环境。
在这里，i是一个虚词，没有任何实际意义。
例如:
①It is a quarter to eight now.
现在是八点差一刻。
②It is midnight. 现在是午夜。
③It is time for breakfast.
现在是吃早饭的时间。
④-What is the date today?今天几月几号?
--It is December 3rd. 十二月三号。
⑤--What season is it?现在是什么季节?
--It is summer. 夏季。
⑥--What is the weather like today?
今天天气如何?
--It is fine.天气很好。
--It is foggy and wet.天气多雾又潮湿。
⑧How far is it from the bus station to your home? 从汽车站到你们家有多远?
⑨It is around five miles to the shopping center.从这儿到购物中心大约有五英里。
中考it用法总结与练习
it 是英语中的重要单词之一，也是中考中时常考到的词汇，中考中时常考查的题型有单项填空、完形填空等；考查的内容有：①it 作人称代词的用法；②it 表示时间、天气、距离等的用法；③it 作形式主语或者形式宾语的用法。
it 用作代词，意为“它”，既可以指物，也可以指人。
it 作人称代词，可以用来代替一个名词、一个短语、一个从句或者一个句子，以避免它们在句中的重复。
这时它可以指提到过的，也可以指未提到过的，在句中作主语、宾语或者表语。
例如：作为人称代词，it 可以指代除人以外的一切事物或者动物。
例如：I d________ my watch and it broke. 我把手表掉在地上摔坏了。
It’s hard work, but I enjoy it. _____________________________。
—Where is the dog? 狗在哪？—It’s in the bedroom. 在________里。
You have __________________; I shall never forget it. 你救了我的命，我永远不会忘记的。
it 指人主要用于指性别不明的婴儿，并不确知的某人，只听其声而不见其人的人，或者用于确认某人的身份。
例如：Is it a boy or a girl? 是男孩还是女孩?There is a ________ on the door. It must be the ________. 有人在敲门，一定是邮递员。
(在答语中，常用来指本人，如说It’s me. 。
)—Listen! Someone ____________. 听！有人在哭。
—Oh, it must be Mary. 噢，一定是玛丽。
Someone must ____________ (be) here. But we have no idea who it was. 刚才一定有人来过这里，但我们不知道是谁。
it的用法讲解及练习
“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) worthwhile 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。
英语中it的用法 系统练习(答案详解)
英语中it的用法系统练习（答案详解）一、it作代词(1)在答语中替代this或that。
如：---What's this？---It's a frog.(2)指已提到过的物体。
如：I've lost it on my way home.(3)指情形、行为等。
如：Jack is ill. Have you heard about it?(4)指人（不明的人或婴儿）。
如：Who is it?(5)指天气、温度、时间、距离等。
如：It is raining. It's very hot. It's five o'clock.二、引导词it(1)作形式主语。
如：1) It is difficult to understand the passage.2) It is no use trying.3) It is said that the meeting will be put off.4) It+take+(sb.) some time / some money+to do sth.例如:It will take them more than ten years to complete the Three Gorges Dam.5 )It+be+said / reported / told等+that-clause. 例如:It is said that he will leave for Beijing tomorrow.6) It+vt.+sb.+that-clause.例如:It worried her a bit that her hair was turning grey.[原题再现]①________is a fact that English is being accepted as an international language.A. ThereB. ThisC. ThatD. It②In fact________ is a hard job for the police to keep order in an important football match.A. thisB. thatC. thereD. it答案: ①D ②D（2）作形式宾语。
中考it用法总结与练习
中考it用法总结与练习it用法总结与练习it是英语中的重要单词之一，也是中考中经常考到的词汇，中考中经常考查的题型有单项填空、完形填空等；考查的内容有：①it作人称代词的用法；②it表示时间、天气、距离等的用法；③it作形式主语或形式宾语的用法。
一、it作人称代词的用法it用作代词，意为“它”，既可以指物，也可以指人。
it作人称代词，可以用来代替一个名词、一个短语、一个从句或一个句子，以避免它们在句中的重复。
这时它可以指提到过的，也可以指未提到过的，在句中作主语、宾语或表语。
例如：1. 指事物作为人称代词，it 可以指代除人以外的一切事物或动物。
例如：I d________ my watch and it broke. 我把手表掉在地上摔坏了。
It’s hard work, but I enjoy it. _____________________________。
—Where is the dog? 狗在哪？—It’s in the bedroom. 在________里。
You have __________________; I shall never forget it. 你救了我的命，我永远不会忘记的。
2. 指人it 指人主要用于指性别不明的婴儿，并不确知的某人，只听其声而不见其人的人，或用于确认某人的身份。
例如：Is it a boy or a girl? 是男孩还是女孩?There is a ________ on the door. It must be the ________. 有人在敲门，一定是邮递员。
(在答语中，常用来指本人，如说 It’s me.。
)—Listen! Someone ____________. 听！有人在哭。
—Oh, it must be Mary. 噢，一定是玛丽。
Someone must ____________ (be) here. But we have no idea who it was. 刚才一定有人来过这里，但我们不知道是谁。
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。
it可以指代句子的用法
it可以指代句子的用法IT 可以指代句子的用法引言：在日常英语交流中，我们经常使用缩写词和缩写句子来简化表达。
其中一个常见的缩写是"IT"，它有多种含义，包括信息技术、信息科学、管理类、工程类等。
然而，在某些情况下，"IT" 也被用作一个独立的词语来指代某个事物或概念。
本文将探讨 "IT" 如何用于句子中，并分析其不同应用方式。
一、 "IT" 作为主语或宾语1.1 提供背景信息当我们想要提到某个事物时，但并不知道具体名称或只关注于该事物的特定方面时，我们可以使用 "it" 作为主语。
例如：- It's raining outside.（外面在下雨。
）- It's getting dark.（天黑了。
）- It's cold today.（今天很冷。
）这些句子中的 "it" 并非具体指代某个物体，而是表示天气、时间或环境等抽象概念。
1.2 替代先行词当一个名词的前后出现多个修饰成分时，为了避免重复使用该名词，我们可以使用 "it" 作为前面修饰成分的替代。
例如：- My car is blue, but I don't like it.（我的车是蓝色的，但我不喜欢它。
）- I bought a new book yesterday and I've already finished it.（昨天我买了一本新书，现在已经读完了。
）这些句子中的 "it" 替代了前面的名词 "car" 和 "book"，避免了重复。
二、 "IT" 作为占位符或形式主语2.1 占位符有时候，在英语句子中，我们需要一个主语来使句子完整，但实际上并没有具体的事物或概念需要指代。
高考第二轮复习——it的用法同步练习
高三英语人教版高考第二轮复习——it的用法同步练习（答题时间：60分钟）一、辨音1. forbid A. fork B. forget C. work D. force2. smooth A. wooden B. classroom C. shoot D. goods3. suggestion A. revolution B. mention C. position D. question4. limited A. improved B. stayed C. nodded D. explained5. meant A. nearby B. wealth C. peaceful D. clear二、单选A组1. —How about _______ Christmas evening party?—I should say it was ________ success.A. a; aB. the; aC. a; 不填D. the; 不填2. —Thank you for joining in our conversation tonight.—_________.A. It’s my pleasureB. It’s all rightC. It’s my dutyD. It’s nice to say so3. _________ parents say and do has a life-long effect on their children.A. ThatB. WhichC. WhatD. As4. As a result of the serious earthquake, two-thirds of the buildings in the area_______.A. need repairingB. needs to repairC. needs repairingD. need to repair5. ________, he managed to finish it in time.A. The job was hardB. Hard as was the jobC. Hard as the job wasD. Hard was the job6. The after-class discussion ________ whether they should go for an autumn outing.A. depends onB. centers onC. keeps onD. attends on7. He commanded that all copies of the book _________.A. be destroyedB. should destroyC. were destroyedD. was destroyed8. The way he did it was different ________ we were used to.A. in whichB. in whatC. from whatD. from which9. John did not feel well yesterday; otherwise he _______to see his classmates off.A. cameB. would comeC. should be comingD. would have come10. There was a nice little gift for everyone, with a suitable poem _______ to it.A. attachedB. to be attachingC. to attachD. attaching11. ____ made the school proud was _____ more than 90% of the students had been admitted to key universities.A. What; becauseB. What; thatC. That; whatD. That; because12. It was not until midnight _______ he found _______ he thought was the best solution.A. that; whatB. that; thatC. when; whatD. when; that13. —Where is that report?—I brought it to you _______ you were in Mr Black’s office yesterday.A. ifB. whenC. becauseD. before14. The village has developed a lot ________ we learned farming two years ago.A. whenB. whichC. thatD. where15. The custom has been ________ from generation to generation.A. passed awayB. passed downC. passed byD. passed off16. Washington, a state in the United States, was named ___ one of the greatest American presidents, _________ him.A. after; in honour ofB. for; in favor ofC. after; in praise ofD. for; in place of17. The mother didn’t know who _______ for the broken glass.A. blamedB. to blameC. should blameD. would blame18. The teacher was _______ when he heard the _______ news.A. annoying; annoyingB. annoying; annoyedC. annoyed; annoyedD. annoyed; annoying19. When spelling a long word, be careful not to ________ a single word.A. leave outB. leave forC. leave offD. leave alone20. —Must I turn off the gas after taking a bath?—Of course. You can never be _______ careful with that.A. enoughB. tooC. soD. veryB组1. It was only with the help of the local guide ______.A. was the mountain climber rescuedB. that the mountain climber was rescuedC. when the mountain climber was rescuedD. then the mountain climber was rescued2. It is what you do rather than what you say __matters.A. thatB. whatC. whichD. this3. It wasn’t until nearly a month later ____ I received the manager’s reply.A. sinceB. whenC. asD. that4. ______ is our belief that improvement in health care will lead to a stronger, more prosperous economy.A. AsB. ThatC. ThisD. It5. —Did Jack come back early last night?—Yes. It was not yet eight o’clock ____ he arrived home.A. beforeB. whenC. thatD. until6. It was some time ____ he realized the truth.A. whenB. untilC. sinceD. before7. It is almost five years __ we saw each other last time.A. beforeB. sinceC. afterD. when8. —How long do you think it will be _____ China sends a manned spaceship to the moon?—Perhaps two or three years.A. whenB. untilC. thatD. before9. _____ in the regulations that you should not tell other people that pass-word of your e-mailaccount.A. What is requiredB. What requiresC. It is requiredD. It requires10. That was really a splendid evening. It’s years _____ I enjoyed myself so much.A. whenB. thatC. beforeD. since11. —_____ that he managed to get the information?—Oh, a friend of his helped him.A. Where was itB. What was itC. How was itD. Why was it12. The doctor advised Vera strongly that she should take a holiday, but ____ didn’t help.A. itB. sheC. whichD. he13. If I can help ____, I don’t like working late into the night.A. soB. thatC. itD. them14. Most of us know we should cut down on fat, but knowing such things isn’t much help when it _ shopping and eating.A. refers toB. speaks ofC. focuses on D comes to15. The chairman thought ____ necessary to invite Professor Smith to speak at the meeting.A. thatB. itC. thisD. him16. As the busiest woman in Norton, she made ____ her duty to look after all the other people’s affairs in that town.A. thisB. thatC. oneD. it17. Why! I have nothing to confess. ____ you want me to say?A. What is it thatB. What it is thatC. How is it thatD. How it is that18. I have always been honest and straightforward, and it doesn’t matter _____ I’m talking to.A. who is itB. who it isC. it is whoD. it is whom19. It was ____ back home after the experiment.A. not until midnight did he goB. until midnight that he didn’t goC. not until midnight that he wentD. until midnight when he didn’t go20. It was with great joy ____ he received the news that his lost daughter had been found.A. becauseB. whichC. sinceD. that三、完形。
“IT”用法考点精讲和精练
“IT”用法考点精讲和精练“IT”用法考点精讲与精练山东高青孙玉忠it 是近年来高考的热点之一。
它不仅可以指代时间、地点、天气、距离等，还可以作形式主语和形式宾语，同时还可以用于强调句结构中。
下面结合高考试题来谈谈它的用法，希望能对同学们有所帮助。
考点一、it作代词时的用法1．用作人称代词，代替前文提到的事，例如：The snake is not a warm—blooded animal. It’s a cold blooded one. 蛇不是温血动物，它是冷血动物。
【高考链接】I hope there are enough glasses for each guest to have ______.A. itB. thoseC. themD. one解析：本题答案为D。
本题考查代词词义辨析。
one 指代上文出现过类似的事物；it 指代上面的提到过的事物；them 指代上文中提到过的事物的复数形式；those 指代那些事物。
根据本句意义，可知最佳答案为D。
2．用以代替指示代词，例如：---What’s this ? ---- It’s a book. ----这是什么？---- 这是一本书。
3．起指示代词的作用，指一个人或事物，例如：----Who’s knocking at the door ? ---- It’s me .---谁在敲门？----- 是我。
4．指时间、季节、天气、距离、环境等，例如：It’s very cold outside. Put on more clothes. 外面非常冷，多穿点衣服。
5.替代词“it, one与that”区别和联系it用来指代前面提到的同一个事物或人；one用来指代前面同名异物的名词, 指的是同类中的一个，所以属于泛指，相当于“a/an+名词”。
one只能代替可数名词，其复数形式是ones；that用来指代前面同名异物的名词，指的是同类中的一个，属于特指，相当于“the+名词”。
it地用法和练习(带问题详解)
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。
高中英语高考it用法讲与练
高中英语高考it用法讲与练★1. 指代作用●(1)用作人称代词，代替前文或后文所提到的该动物，事情或东西(单数可数名词或不可数名词)。
1)This is a new minibus. I bought it last week.2)We saw a panda at the foot of the mountain yesterday. It was eating some fresh bamboo then.3) ----Where have you put the rice?----I put it in the cupboard two days ago, but it is gone.●(2)代替前面的整个句子。
1)Tom joined the air force last year. Do you know about it?2)When the factory shuts down, it will mean about 9000 workers losing their jobs.3)It is said that her aunt died of lung/liver cancer, but it isn’t true．◆It is said that her aunt died of lung/liver cancer, which isn’t true．(定语从句)4)Mrs. Green advised her husband strongly that he should stop smoking, but it didn’t help/work.◆Mrs. Green advised her husband strongly that he should stop smoking, which didn’t help/work.(定语从句)●(3)用以代替指示代词this或that。
it的指代功能点拨(同步练习)
it的指代功能点拨（同步练习）found it (5) hard to walk there. Then he took a bus home. Unfortunately it (6) went wrong. When he got home, he was wet through. Thus it (7) was a day that he would never forget.三、阅读理解My father had always been an alert observer of human character. Within seconds of meeting someone, he could sum up their strengths and weaknesses. It was always a challenge to see if any of my boyfriends could pass Dad’s test. None did. Dad was always right －they didn’t pass my test either. After Dad died, I wondered how I’d figure it out on my own.That’s when Jack arrived on the scene. He was different from any other guy I’d dated. He could sit for hours on the piano bench with my mother, discussing some composers. My brother Rick loudly announced that Jack wasn’t a turkey like the other guys I’d brought home. Jack passed my family’s test. But what about Dad’s?Then came my mother’s birthday. The day he was supposed to drive, I got a call. “Don’t worry,” he said, “but I’ve been in an accident. I’m fine, but I need you to pick me up.”When I got there, we rushed to a flower shop for something for Mom. “How about gardenias?”Jack said, pointing at a beautiful white corsage(胸花). The florist put the corsagein a box.The entire ride, Jack was unusually quiet. “Are you all right?” I asked. “I’ve been doing a lot of thinking,” he said. “I might be moving.” Moving? Then he a dded, “Moving in with you.”I nearly put the car on the sidewalk. “What?” I asked. “I think we should get married,” he said. He told me he’d planned his proposal in a fancy restaurant, but after the accident, he decided to do it right away. “Yes,” I whispe red. We both sat dumbfounded, tears running down our cheeks. I’d never known such a tender moment. If only Dad were here to give his final approval.“Oh, let’s just go inside.” Jack laughed. My mother opened the door. “Happy Birthday!” we shouted. Jack handed the box to her. She opened it up. Suddenly, her eyes were filled with tears. “Mom, what’s wrong?” I asked. “I’m sorry,” she said, wiping her eyes. “This is only the second gardenia corsage I’ve ever received. I was given one year ago, long before you kids were born.” “From who?” I asked. “Your father,” Mom said. “He gave me one right before we were engaged.” My eyes locked on Jack’s as I blinked away(眨掉) tears. Dad’s test?I knew Jack had passed.1. According to the text, we know the writer’s father was __________.A. interested in observing things aroundB. good at judging one’s characterC. strict with her boyfriendD. fond of challenges2. What is the main idea of Paragraph 2?A. Jack got the family’s approval except Dad’s.B. Jack was different from any other boy.C. Jack was getting on well with Mother.D. Jack knew a lot about piano.3. The underlined word “proposal” in Paragraph 5 means __________.A. piece of adviceB. wedding ceremonyC. celebration of birthdayD. offer of marriage4. On hearing “moving in with you”, the writer felt _________.A. pleasedB. worriedC. surprisedD. disappointed一、1. C 解析：在比较状语从句中用that代替上文出现过的名词the air，但不是the air there（那里的空气）本身，one也有此用法，但是that可以代替不可数名词，one不可以。
九年级it用法及练习
It的用法总结在英语中,it有许多不同的用法,它既可以用作代词(如人称代词、非人称代词)，也可以用作引导词（作形式主语或形式宾语），还可以用来构成强调句型。
1.it用作代词(1) 用作人称代词在句子中作主语或宾语；指前面已经提到过的事物、动物或人，且it指特定的事物；如果指前文中提到的事物中的任何一个，用one。
one可以与any, each, every, not等连用，但one不可代替不可数名词。
—Where’s your car?—It’s in the garage. 你的汽车在哪儿呢？在车库里。
(指代物品your car)Did you hit it? 你打中了吗？(指代事件)The baby cried when it was hungry.这婴儿饿时就哭。
（指代婴儿，尤指性别不详或无所谓时）—Who is that?—It’s me. 是谁？我。
(指一定情景中所确定的人或事物，此时相当于指示代词，代指this和that,有时也指人)—What’s this?—It’s a box. 这是什么？一只箱子。
(2) 作非人称代词表示天气、日期、时间、温度、距离、价值、路程、度量、自然现象与环境等。
也可模糊地指一般情形或上文的部分或整个意思。
译成汉语时，it通常不一定译出来。
It’s a long time since they left. 他们走后很久了。
It’s two miles to the beach.离海滨有两英里远。
That’s just it—I can’t work when you’re making so much noise.原因就在这里——你弄出这么大的声音，我工作不了。
另外，需要注意两点：（1）“It’s time…”后面可以接不定式和介词短语表示“是做……的时候了”。
如：It’s time for supper. It’s time to have supper.(2) “It’s time…”后面还可以接一个从句，但是从句中的谓语动词一定要用过去式即虚拟语气，如：It’s time we had lunch.是我们吃饭的时候了。
14It的用法语法点及练习
14It的用法语法点及练习《高中英语语法大全》第14章“It”用法及其句型和固定搭配"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/anno y/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 tooka 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。
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（答题时间：20分钟）一、单项选择：1. I’m moving to the countryside because the air there is much fresher than ______ in the city.A. onesB. oneC. thatD. those2. Someone is ringing the doorbell. Go and see_______.A. who is heB. who he isC. who is itD. who it is3. Catherine bought a postcard of the place she was visiting, addressed ______ to ______ and then posted it at the nearby post office.A. it; herB. it; herselfC. herself; herD. herself; herself4. The doctor advised Alice strongly that she should take a holiday, but ______ didn’t help.A. itB. sheC. whichD. he5. – A latest magazine, please.– Only one left. Would you like to have ________?A. itB. oneC. thisD. that二、读下面短文，说说其中的it是什么用法。
It (1) was a sunny Sunday. Peter decided to go for a walk to the park, though it (2) was two miles away. It (3) was so comfortable to walk on the street. Suddenly it (4) began to rain. He found it (5) hard to walk there. Then he took a bus home. Unfortunately it (6) went wrong. When he got home, he was wet through. Thus it (7) was a day that he would never forget.三、阅读理解My father had always been an alert observer of human character. Within seconds of meeting someone, he could sum up their strengths and weaknesses. It was always a challenge to see if any of my boyfriends could pass Dad’s test. None did. Dad was always right－they didn’t pass my test either. After Dad died, I wondered how I’d figure it out on my own.That’s when Jack arrived on the scene. He was different from any other guy I’d dated. He could sit for hours on the piano bench with my mother, discussing some composers. My brother Rick loudly announced that Jack wasn’t a turkey like the other guys I’d brought home. Jack passed my family’s test. But what about Dad’s?Then came my mother’s birthday. The day he was supposed to drive, I got a call. “Don’t worry,” he said, “but I’ve been in an accident. I’m fine, but I need you to pick me up.”When I got there, we rushed to a flower shop for something for Mom. “How about gardenias?”Jack said, pointing at a beautiful white corsage(胸花). The florist put the corsage in a box.The entire ride, Jack was unusually quiet. “Are you all right?” I asked. “I’ve been doing a lot of thinking,” he said. “I might be moving.” Moving? Then he added, “Moving in with you.” I nearly put the car on the sidewalk. “What?” I asked. “I think we should get married,” he said. He told me he’d planned his proposal in a fancy restaurant, but after the accident, he decided to do it right away. “Yes,” I whispered. We both sat dumbfounded, tears running down our cheeks. I’d never known such a tender moment. If only Dad were here to give his final approval.“Oh, let’s just go inside.” Jack laughed. My mother opened the door. “Happy Birthday!” we shouted. Jack handed the box to her. She opened it up. Suddenly, her eyes were filled with tears. “Mom, what’s wrong?” I asked. “I’m sorry,” she said, wiping her eyes. “This is only the second gardenia corsage I’ve ever received. I was given one year ago, long before you kids were born.” “From who?” I asked. “Your father,” Mom said. “He gave me one right before we were engaged.”My eyes locked on Jack’s as I blinked away(眨掉) tears. Dad’s test? I knew Jack had passed.1. According to the text, we know the writer’s father was __________.A. interested in observing things aroundB. good at judging one’s characterC. strict with her boyfriendD. fond of challenges2. What is the main idea of Paragraph 2?A. Jack got the family’s approval except Dad’s.B. Jack was different from any other boy.C. Jack was getting on well with Mother.D. Jack knew a lot about piano.3. The underlined word “proposal” in Paragraph 5 means __________.A. piece of adviceB. wedding ceremonyC. celebration of birthdayD. offer of marriage4. On hearing “moving in with you”, the writer felt _________.A. pleasedB. worriedC. surprisedD. disappointed一、1. C 解析：在比较状语从句中用that代替上文出现过的名词the air，但不是the air there （那里的空气）本身，one也有此用法，但是that可以代替不可数名词，one不可以。
2. D 解析：说话时，不知道对方的性别，用it。
注意在宾语从句中需用陈述语序。
3. B 解析：句意：凯瑟琳买了一张她正游览的地方的明信片，在上面写上自己的地址，然后在附近的邮局寄了出去。
address... to sb. 在此句中是及物动词，意为“写某人姓名、地址于……”。
it指上文的明信片。
4. A 解析：根据句意：医生的建议未起作用。
it代替整个句子。
注意连词but。
5. A 解析：给我一本最新的杂志。
只剩下一本了，你想要把它买走吗？此处it指代前文所提到的仅剩的一本杂志。
二、1. 指日期。
2. 指距离。
3. 代替不定式to walk on the street作形式主语。
4. 指天气。
5. 代替不定式to walk there作形式宾语。
6. 代指上文的a bus。
7. 代指上文的Sunday。
三、【文章综述】本文讲述了爸爸是一个善于判断别人性格的人，我的很多男朋友都没有通过他的考查，在父亲去世后，Jack通过了父亲的考查。
1. B 解析：细节题。
根据文章第一段1,2行My father had always been an alert observer of human character. Within seconds of meeting someone, he could sum up their strengths and weaknesses.可知作者的父亲擅长看人的性格，B正确。