It常用句型 用法的专题讲解.ppt

It 常用句型1.I have always been honest and straightforward,and it doesnt matter_Im talking to.A.who is it B.who it isC.it is who D.it is whom2.It wont be long _ he comes to our help.A.before B.since C.that D.when It be+adj.+for/of sb.to do sth.It be+adj.+doing sth.It作形式主语的结构 It 与强调句型 It与连词before/when/since Its time to do Its time结构 Its time for sth Its time that It 其他句型It be+adj+thatIt be+ved+thatIt be+n.+thatIt+vi.+that231vIt be+adj.+for/of sb.to do sth.对某人来说，怎么样动词不定式复合结构It is difficult for me to make a decision.It is foolish of you to cheat in the exam.TIP:选择什么介词，关键是看形容词说明谁 It is necessary _ us to master a foreign language.forIt is kind _ Tom to offer to help me study in Englishofeasy,hard,impossible,possible,importantnice,good,wrong,clever,careful,polite1vIt be+adj.+doing sth.怎么样It is no use crying over spilt milk.覆水难收Its senseless seeing such a tiring film a second time.再看一次这种电影真没有意义仅有：no good,no use,useless,senseless,worthwhile,waste,dangerous给他提建议是没有用的，他是不会接受的It is no good giving him advice,because he willnot receive it.动名词复合结构2vIt 作形式主语的结构It is certain that the constant rising of the oil price will affect the development of the world economy.It is said that the president received an anonymousletter yesterday.不断上涨油价肯定会影响国际经济的发展据说总统昨天收到一封匿名信It is no surprise that every coin has two sides.任何事情都是一分为二的，这一点不足为怪adj.p.p.nounTIP:that-clause 才是真正的主语，it 作形式主语It happened that I had seen the film.碰巧我已看过了那部电影vi注意：1.it 作形式主语代替主语从句时，要注意和引导的定语从句有区别据报道，美国遭到恐怖分子的袭击It was reported that the US was under the terrorist attackAs was reported,the US was under the terrorist attack主语从句，有that,无逗号定语从句，无that,有逗号2.1）过去分词为表示“建议”、“命令”，“愿望”如suggested,ordered,requested等此时，从句需用虚拟语气.动词形式：(should)+动词原形It is requested that Mr.Wang(should)give a performance.有人请求王先生表演一个节目类似的词还有：necessary,strange,important,natural,a pity拓展 e.g.I found it easy to get along with her.We think it no use keeping in touch with that company.I took it for granted that they were not coming.当宾语是动词不定式、动名词、宾语从句且其后有宾语补当宾语是动词不定式、动名词、宾语从句且其后有宾语补 足语时，为了保持句子结构平衡，用足语时，为了保持句子结构平衡，用it作形式宾语，作形式宾语，而将真正宾语至于句末。而将真正宾语至于句末。某些及物动词或短语不能直接加宾语从句。某些及物动词或短语不能直接加宾语从句。此种用法常用于此种用法常用于like,dislike,hate,appreciate,depend on等之后。等之后。I hate it when people talk with their mouths full.You may depend on it that they will support you.It is/was+被强调部分+that-clauseIt was I who/that picked up a leather wallet on the square the other day.e.g.The other day I picked up a leather wallet on the squareIt was a leather wallet that I picked up on the square the other day.It was evening_ we got to the lonely village.We got to the lonely village evening.whenIt was in the evening_we got to the lonely village.We got to the lonely village in the eveningthat1.Susan looks unhappy today.-Yes,but she cant tell what it is_is bothering her.A.as B.what C.that D.which 2.It was about 600 years ago _ the first clock with a face and an hour hand was made.A.that B.until C.before D.when 3.It was not until 1920 _ regular broadcasts began.A.while B.which C.that D.since 1.It be+时间段+before引导的状语从句 “过多久才”be not+时间段+before引导的状语从句 “不久就”It was two hours before the fireman arrived hereIt was not five minutes before the fireman arrived here.过两个小时消防员才到没过五分钟消防员就到了It be+时间点+when引导的状语从句It was 5 oclock when he came home yesterday.他昨天晚上回家时是五点了It be+时间段+since引导的状语从句 主句主句 从句从句 意义意义 is /has beenV-ed从过去的一个时间延续至说话的现在 wasHad v-ed从过去的某个时间点延伸至另一个过去时间点 isV-ed(延续性动延续性动词词)自从动作的结束以来多长时间了23I t has been three weeks since he arrived here.他到这儿已经有三周了It is two years since I saw him last time.自从我上一次见到他已经有两年了1自从有多久了It was years since I had seen her.我和他好几年没见面了。2-It is 5 years since she worked in the shoe factory.-_.A.No wonder she is valued here.B.B.Where is she working now?C.C.Now she is a manager.D.D.She must be getting on well with her workmates.It is two years since he left London.It is two years since he lived in London.自从他不在伦敦住已经有两年了。类似：meet,see,go类似:stay,smoke,work,beIt is three years since he smoked.自从他不抽烟有三年了自从他离开伦敦有两年了Its time 结构结构“是是时候了时候了”Its time to begin our classIts time for the meeting.Its time that we should go to bed/went to bed.TIPS从句中，谓语动词要用虚拟语气，用“should+动词原形”（should不能省）；或者用动词的过去式It is/was+the first(second)time+that-clause某人第一（二）次做某事It is the fourth time that she has rung you todayIt was the second time that I had visited the Great Wall last yearTIPS主语除了it外，也可用this,that，其中序数词也可修饰day,month,year等名词It seems/appears thatIt seems/looks as ifIt takes sb.some time+to doIt makes no difference whether1.I have always been honest and straightforward,And it doesnt matter_Im talking to.A.who is it B.who it isC.it is who D.it is whom聚焦高考聚焦高考2.It wont be long _ he comes to our help.A.before B.since C.after D.when3.(05上海38）_in the regulation that you should not tell other people the password of your e-mail account.A.What is required B.what requires C.It is required D.It requires4.(NMET 1995)is a fact that English is being accepted as an international language.A.There B.This B.C.That D.It5.(NMET2004)I like _ in the autumn when the weather is clear and bright.A.this B.that C.It D.one6.（2005安徽29)It was 5 oclock _he went back.A.when B.that C.before D.since Proof Reading:1.(05浙江卷)Usually I just checked the results because I thought that was dull to watch a game in which players kicked a ball each otherit2.（05江西）This is not surprising that the Silver Ghost was regarded the best car in the world.ItTranslation我们在六中学习有三年了。不久我们就要毕业了。在老师的帮助下，我们取得了进步，我觉得考入大学多我来说没问题。