It的用法汇总
It的句式：
一、强调句：It is/was + 被强调部分+ that …（注意not…until的句式；do/did/does强调）
I met Tom in the street yesterday.
I didn’t find my lost pen until yesterday.
It was not until yesterday that I found my lost pen.
I didn’t go to bed until mother came back.
It was not until mother came back that I went to bed.
二、形式主语，代替doing、to do、that-从句
?It is very kind of you to help us.
?It is important for us to learn English well.
?It is important that we should learn English well.
?It is my honor to give a short speech here.
?It is my honor that I can give a short speech here.
?It is said that we will begin our winter holiday on January 31.
?It is suggested that we should begin our winter holiday on January 31.
总结：
?做某事没好处、没用、没帮助：
It is no good/ no use/no help doing
?It is kind of sb. to do sth. (这些形容词常与人的性格特点品质有关: kind, cruel, clever, bright, foolish, stupid, silly, wise, careful, rude, careless, impolite, good, nice, silly, brave, honest, considerate, thoughtful etc. )
?It is difficult for sb. to do sth.(形容词表明的是不定式行为本身的特点: important, difficult, easy, hard, necessary, interesting, dangerous, possible, impossible, likely, heavy wrong, right, useful, necessary, proper, beneficial etc.)
?做某事是我的荣幸、责任；遗憾、羞愧要做某事：
It is my honor/my duty/a pity/a shame to do sth.
?某事明显、真的、可能、确定、正确：
It is clear/obvious/true/possible/certain/right that
?某事重要、必要、奇怪、自然：
It is important/necessary/ strange/natural that-should do(虚拟)
?做某事是我的荣幸、责任；遗憾、羞愧要做某事：
It is my honor/my duty/a pity/a shame that
?某事是事实、常识、惊喜：
It is a fact/common knowledge/a surprise that
?人们相信…/据报导…/据说…/众所周知…/人们宣布…/人们认为…/人们希望…/据估计…
It is believed/reported/said/known/ announced/ thought/ hoped/estimated that…
?建议/命令/要求某事：
It is suggested/ordered/requested/commanded that – should do(虚拟)
?似乎…/碰巧…/我突然想起…
It seems/appears/happened/turns out/occurred to me that …
三、形式宾语，代替doing、to do、that-从句
1. find it +形容词/名词+ to do
2. find it +no good/no use/no help doing sth.
3. find it +形容词/过去分词/名词+ that
4. make/think/feel/ consider/believe/suppose与find有相同用法
5. take it for granted that 认为…是理所当然的
6. I would appreciate it if 如果…我会感激不尽
7. make it clear that 弄清楚
8. make it a rule that 使…成为习惯
四、其它句式：
1. It is (about/high) time that-从句(虚拟)
2. It takes sb. some time to do sth
3. It cost sb. some money to do sth
4. It’s one’s turn to do sth. 该轮到某人做某事了…
5. It is no wonder that 难怪…
6. It remains to be seen whether…是否…还有待证实
连词陷阱：
?It is the first time that I have been here.
?It was the second time that he had seen the film.
?It was 1982 when he was born.
?It was in 1982 that he was born.
?It is five years since he died.
?It will be 17 months before you graduate from this school.
?It was three days before he came back.
7. It/This/That is the first/second/third…time that +现在完成时
It/This/That was the first/second/third…time that +过去完成时
8. It + be +时间点(没介词) + when-clause
9.It is/has been +段时间since sb did sth自从......以来已多久了
It was +段时间since sb had done sth.
10.It will be+段时间+ before…要过多久…才…
It was +段时间+ before …过了多久才…
It was not (won’t be) long before… 不久就…
五、其它固定表达：
1. make it 成功，做到，赶上
2. take it easy 不紧张、不担心
3. It depends. 看情况而定。
4. It is up to you. 你决定吧。
5. Believe it or not. 信不信由你
2011届高考英语一轮复习讲解：it的用法
2011届高考英语一轮复习讲解：it的用法【知识要点】 It的用法 （一）作人称代词 1、it代替前面（或后面）的单数名词或分句等所表示的事物。 e.g. You cannot eat your cake but have it.（it代替前面的cake） Although we cannot see it, there is air all around us. （it代替后面的air） They say he has left town, but I don’t believe it.（it代替前面They…town分句中的情况） 2、代替有生命但不能或不必分阴阳性的东西（包括婴儿）。 e.g. Yesterday we saw a big tree. It was fully twenty metres high. （it代替前面的tree） The baby cried because it was hungry. （it代替前面的baby） 3、在某些习惯说法中，可以代替人。 e.g. ---- Someone is knocking at the door, Peter. ---- Who is it? ---- It’s me. ---- Who are singing? ---- It is the children. ---- The light is still on in the lab. It must be the third-year students doing the experiment. 4、it与one的区别：这两个词都可以代表前面说过的名词，但it用于同名同物的场合；one则用于同名异物的场合。 e.g. ---- Do you still have the bicycle? ---- No, I have sold it. ---- Is this knife yours? ---- No. It is Xiao Zhang’s. Mine is the one on the desk. 5、it与that的区别：两词都可代替某一特定名词，但that指同一类，并非同一个。 e.g. The climate of South China is mild（温和的）; I like it very much.（it指the climate of South China） The climate of South China is much better than that of Japan.（that指the climate）（二）作无人称代词 it作无人称代词时，除了句中找不到它所代表的词语外，另一个特点是它后面的内容都是表示天气、时间、距离、度量衡及情况等。 It is fine (rainy, windy, etc.). It is noon. It is a half hour’s walk to the f actory. It is eighteen square metres in area. What does it matter? （三）作强调词，构成强调结构
it的用法归纳
?Never be afraid of grammar ?Collect some examples; ?Watch them very carefully; ?Find out something in common; ?Try to use the rules ---- practise. it用法完全归纳 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。(从句谓语用过去式，有时也用“should+动词原形”) It’s first (second) time + that-从句. 某人第几次干某事。(从句谓语用现在完成时)
英语it的用法小结
英语it的用法小结 江苏沛县湖西中学鹿俊先 221611 1．实义的it。 实义的it用来指代具体的内容。 1．1．指代上文提过的除人以外的生物或非生物，复数形式为they。 The earth is the planet that we live on. It is the fifth largest planet of the solar system. This car is not fast enough. It can only do 60 miles an hour. John is in the school football team. It was reorganized last year. “Where is the cat?”“It is in the garden.” “Where are the cats?”“They are in the garden.” 1．2．指代上文提过的性别不明或无须指明性别的小孩。 To feed a child without also educating it is a fault in the father. What’s matter with the baby? It has been crying. Her baby is due next month. She hopes it will be boy. 1．3．作主语指代上文提过的人，谓语用以指明该人的身份。 “Who is that at the door?”“It’s the postman.” The footsteps drew nearer and she saw from behind the curtain who her visitor was. And she opened the door to welcome her. It was Maria Cragg.（文中的主人已知客人是谁，所以在使用It之前就使用了her，但读者依然不明白，所以最后用It 作主语谓语指明该人的身份。） 1．4．作主语，指代谓语部分所说明的自然现象（如：风、雨、热、冷）、季节、时间、距离、环境等。 It was raining hard when he got off the train. Is it very cold in your country in December? It is high time (that) we had a rest. It was early spring / 1986 when we first met. It is six months since he lost his job. It won’t be long before we meet again. It is only two hours’ ride / eighty miles to Cleveland. It is very dark / pretty / crowded / noisy /dirty in the room. 1．5．指代上下文或一定语境所表明的情况、事件等。 “I’m trying to change my job.”“You’ll find it difficult.”（it指调换工作这件事。） “I’ll have to work all night through.”“It is awful.”（it指你彻夜工作这件事。）You’ll be in trouble before you know it.（it指你陷入困境这件事。。） English is very important, and we all know it.（it指英语的重要性。） When the factory closes, it will mean 500 redundancies.（it指工厂倒闭这件事。有些学者把此处及以下四个句子中的it解释为形式主语或形式宾语但却无法解释没有真正的主语/宾语何来形式主语/宾语。） I’d appreciate it if you could help me with the work.（it指你帮助我工作这件事。）
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。 It's time we started.是我们该出发的时候了。 2.it用作引导词 (1) 作形式主语由动词不定式、动词-ing短语或名词性从句担任主语的句子，常用it来作形式主语，而把真正的主语放在句子的后面。 It's not easy for us to learn English well. [句型为: It +be+形容词+（for sb.）to do sth.] It's foolish of you to say that to her. [句型为: It +be+形容词+（of sb.）+to do sth.] It's no use/good/help…sleeping too much. (句型为: It +be+名词+doing) It's important that we be there on time.（句型为: It +be +形容词+that从句） It's high time that Tom went to school. (句型为: It +be +time +that从句，从句中的动词用过去时) It was the second time that he had telephoned me that day. [句型为: It +be+ the first(second, third)time +that从句]（that从句中动词用完成时） +that过去分词: It +be+句型为It was arranged that they should leave the following winter. ( 从句)
make it全部用法详解
用法一表示事业获得成功 You will make it if you try. 你会成功的，如果你努力的话。 He’s never really made it as an actor. 他当演员从未有所成就 用法二表示某人做成某事 You needn’t worry; he will make it. 你不必担心，他会办成的。 If you want to make it, better get doing. 如果你想把这事干成，就该动手了。 I can’t make it on Friday.It’s very short notice. 星期五我办不好，时间太短了。 Many high-wire walkers died on their last step, thinking they had made it. 许多走绳索者死在最后一步上，这时他们认为已经表演成功了。 I thought he would be too old to get to the top of the mountain, but he made it at last. 我原以为他年纪大爬不到山顶，但最后他还是爬上去了。 用法三表示设法做到某事 I’ve been having violin lessons every two weeks, but I think I’ll make it every week from now on. 我一直是每两个星期上一次小提琴课，但是我想从现在起每个星期都上课。 用法四表示及时赶上火车等
The train leaves in five minutes—we’ll never make it. 火车再有五分钟就开了——我们绝对赶不上了。 The train won’t le ave for another ten minutes, so I think we can make it. 离开车还有10分钟，我想我们能赶得上。 用法五表示及时抵达某地 We are too late; I don’t think we can make it. 我们太迟了，我想我们难以准时赶到了。 He says he’ll come on time, but he’ll never make it. 他说他明天准时来，但他绝对做不到。 I’m really sorry, but I won’t be able to make it on Sunday after all. 真的很抱歉，我星期天根本赶不到。 If you can’t make it Friday, we can invite somebody else. 如果你星期五赶不到，我们可邀请其他人。 用法六表示约定时间 “When shall we meet again?” “Make it any day you like; it’s all the same to me.” “我们什么时候再次碰头?”“随你定在哪天，我无所谓。” Let’s make it at seven o’clock on Tuesday morning at my office. 我们把时间定在星期二早上七点，地点就在我办公室。
中考英语专题 it用法小结
十六、it用法小结 题1 指出it在句中的作用，并译成汉语。 1．Who’s that baby? It’s me. 2．This is my book. I got it just now. 3．Look at the bird. It’s always come my window. 4．It was she who did it. 5．It is the farm that we visited last week. 6．Who is it ? It’s Tom. 7．It’s hot today. We shan’t go there. 8．What day is (it) today? It’s Sunday. 9．How long is it ? It’s five metres long. 10．What time is it ? It’s six o’clock. 11．How far is it from here? It’s 50 kilometres. 12．It is three years since I saw him. 13．It isn’t easy to learn English well. 14．We found it easy (difficult) to learn English. 15．What’s the date today ? It is January lst. 题2 选择填空。 1．The book is not mine. I borrowed from library. A．that B．it C．this D．him 2．Doesn’t matter if be can’t finish the job on time? A．this B．that C．he D．it 3．I don’t think necessary for you to worry too much about your son. A．those B．that C．it D．this 4．appears that the nurse is too tired. A．It B．She C．This D．That 5．Is possible to fly to the moon in a spaceship? A．now B．man C．that D．it
it的用法及句型总结
It的用法 一、Tell the functions for “it” in each sentence: 1、---What’s the weather together ---It is fine. 2. It is hard to communicate with him. 3. I find it hard to communicate with him. 4. It is Li that who cleaned the classroom. 5. It is a book. 二、It 用法归纳 1，指代it （1）.用作人称代词：指代物、整个句子 （2）用作非人称代词 2，形式it：（1）作形式主语（2）作形式宾语 3，强调it 4，特殊句型 5.在答语中指代this/that： 1).--- Whose book is that ---It’s mine. 三、特别注意： it, one和that作替代词的用法及区别 1. it代替前面提到的同一事物,该事物既可以是可数名词也可以是不可数名词。 (特指，指代单数，指代物，同名同物) Can I borrow your pen—Sorry， I’m using it.
2. one代替前面提到的同类事物中的一个。该事物只能是可数名词,前面可以有冠词,也可以被this、that或形容词修饰,其后也可以有定语。（泛指，指代可数名词，指代人或物，同名异物） I have a bike. Do you have one Eg: (1).I bought a dictionary three years ago and I am still using______ now. (2) I bought a dictionary three years ago but I am going to buy a new _______soon. (3). that代替前面提到的同类事物中特指的一个。该事物既可以是可数名词也可以是不可数名词,必须要有后置定语,但不可以有前置修饰语。（特指，指代单数或不可数，指代物，后面有定语） The coffee produced in Brazil is more famous than __________in Mexico. 四：形式主语、宾语、强调句及其他
高中英语语法权威解析二---“It”用法及其句型和固定搭配讲解(附练习题)
第二章“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. +clause It'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 + clause It+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.
It-的用法总结讲课稿
It 的用法总结 一. 代词: 1)指代上文 2)指代this/that 3)指代未知性别的婴儿或孩子或身份不明的人 4）指代时间/地点/天气/温度/距离/环境 1.It gets dark very early in the winter. 2.What will you call it if it’s a boy? 3.I love spring---It’s a wonderful time of the year. 4.It’s less than 100 kilometres from here to Jinan. 5.When the factory closes, it will mean 500 people losing their jobs. 6.What’s this? It’s a cat. 7.It has snowed much this year. (1)The book in your bag is very interesting. Can I borrow ? (2) The book in your bag is more interesting than ______ on the desk. (3) The weather here is much colder than____ in Nanjing. (4) The books are free. You can take____ free of charge. (5) The books in the bag are better than _____ on the desk.
高考语法it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。 e.g. It’s said that they have succeeded in carrying out this experiment.据说他成功的进行了这次实验。 【注意】在“It is suggested/advised/ordered/requested/insisted/required/demanded＋that从句”结构中，从句要用虚拟语气，即谓语动词用“should＋动词原形”，should可省略。 e.g. It is suggested that you (should) spend more time in studying English. 建议你花更多时间学习英语。 (5) 其他句型，如It doesn’t matter.../It makes no difference...等。 e.g. It doesn’t matter what you wear, as long as you look neat and tidy.你穿什么不重要，只要看上去整洁就可以。 It makes no difference to me whether you go or not. 你去或不去对我来说都没有区别。 2. it作形式宾语的情况 (1)动词find, feel, think, consider, make, believe等后有宾语补足语时，则需要用it作形式宾语，把作为真正宾语的that从句后置。
It的用法总结
I t的用法总结文档编制序号：[KKIDT-LLE0828-LLETD298-POI08]
It 的用法总结 一. 代词: 1)指代上文 2)指代this/that 3)指代未知性别的婴儿或孩子或身份不明的人 4）指代时间/地点/天气/温度/距离/环境 gets dark very early in the winter. will you call it if it’s a boy love spring---It’s a wonderful time of the year. ’s less than 100 kilometres from here to Jinan. the factory closes, it will mean 500 people losing their jobs. ’s this It’s a cat. has snowed much this year. (1)The book in your bag is very interesting. Can I borrow (2) The book in your bag is more interesting than ______ on the desk. (3) The weather here is much colder than____ in Nanjing. (4) The books are free. You can take____ free of charge. (5) The books in the bag are better than _____ on the desk.
it的用法
一. 基本用法 1. 用作人称代词，代替上文提到过的事物，或事物（同名同物）。The train has arrived. It arrived half an hour ago. I have a car, so you can borrow it. one 指代单数可数名词，同名异物。He has an MP4, but I will buy one tomorrow. that特指单数可数名词或不可数名词。The population of China is larger than that of Japan. The weather of Chongqing is hotter than that of Beijing. 2. 用来代替提示代词this, that。—What’s this?—It’s a knife. —Whose watch is that?—It’s mine. 3. 指代不明性别的人。—Who is knocking at the door? —It’s me. It is a baby. 4. 指环境情况、时间、日期、天气、温度、季节、距离、价格、速度等。It was very noisy at the very moment. —What time is it? —It’s eight o’clock. It often rains in summer here. It is a long way to the school. It is 29 ℃ today. It is five kilometers away. 5. 作形式主语。It is not easy to finish the work in two days. It is no use helping him solve the problem. It is a pity that you didn’t read the book. 6. 作形式宾语。I think it no use arguing with him. I found it very interesting to study English. He made it clear that he was not interested in that subject. 7. 用于强调结构。①It is/was + 被强调部分+ that/who + 原句剩余部分It was Xiaoming whom(that)I met in the street last night. It was in the street that I met Xiaoming last night. It ws last night that I met Xiaoming in the street. It was I who met Xiaoming in the street last night. Was it in the street that you met her? ②特殊疑问词+is/was+it+that+原句剩余部分Who was it that broke the window? What is it that you want me to do? Where was it that he bought the bike?③对until进行强调要把not放在前面。It was not until yesterday that I met my old friend.It was not until he told me that I knew it.④对as,since引导的原因状语从句，要把as,since变成because.It was becaude he got up late that he missed the first bus.⑤判断是否是强调句的方法：It is/was…that/who去掉，看句子是否完整，完整的是强调句。It is there that accidents often happen. It is clear that not all the boys like football. ⑥注意强调句与主语从句、定语从句、状语从句的区别It is a good idea that occurs to me suddenly（强调句）. It is a good idea that we play basketbll after school(主语从句). It is in a small factory that my brother is going to work（强调句）. It is a small factory where my brother is going to work.（定语从句）It wa s five o’clock when the plane landed at the airport(状语从句). It was at five o’clock that the plane landed at the airport（强调句）. 二. 含有it的句型 1.It is time (for sb.) to do sth. It is high/about time that sb. did/should do sth.(虚拟语气) It is time for us to have a rest. It is high time that we took/should take action. It’s about time that we went to the airport. 2. It is + adj. +of / for sb. + to do sth. 形容词为brave, clever, careful, hopeless, kind, good, naughty, nice, silly,stupid,foolish, wise等对人的品质或性格进行评价的词, 一般用 of. It is very kind of you to help me. 3. It is + adj. + that + sb. + (should) do sth.（虚拟语气）, 能用于这个句型的形容词有strange, wonderful, natural, good、proper, right, wrong, well, fortunate, important, necessary, useless, likely, probable, impossible等, 可省去should而直接用动词原形。如：It is important that we should pay close attention to grain. It is natural that he（should）say so. 4. It is no use/ good + doing sth. It is no use trying again. It is no good arguing with your leaders. 5. It is said/reported/announced/ (well) known … that… It is said that he does well in English. 6. It is/was +一段时间+ since … It is three years since I met him in Beijing. It is a long time since I lived in that small mountain village with these farmers.It is five months since I arrived in New York. It is five months since I was in New York. 7.It will be+一段时间+ before …主句的时态可用一般将来时或一般过去时。It will be several years before we meet again. It was not long before they set out for the front. 8. It is /was/will be the first/second/third … time that … It is the first ti me that I have been here. It was the second time that he had seen the film. 9.It is up to sb. to do sth … 应由某人做某事。It is up to you to decide whether we start or not. 10. sb. hate/like/dislike/love/enjoy/resent/appreciate/don’t mind/be fond of/feel like/see to等+it+宾语从句。 I hate it that you can swim so well. I enjoy it when you help someone who is in trouble. 11. It takes sb. some time/ some money to do sth. It took him five years to draw a horse well. 12. 主语+vt.+it+n./adj.+to do sth. I think it hard for you to do the task on you own. 13. 主语+vt.+it+n./adj.+宾语从句。I think it important that you should attend the meeting.