虚拟语气中的非真实条件句精选PPT.ppt

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1、关于虚拟语气中的非真实条件句第1页，讲稿共40张，创作于星期三Grammar and usageUnreal conditionals虚拟语气中的非真实条件句虚拟语气中的非真实条件句第2页，讲稿共40张，创作于星期三虚拟语气可用于条件句和其它一些从句中。虚拟语气可用于条件句和其它一些从句中。虚拟语气用于条件句中比较多虚拟语气用于条件句中比较多,情况也比较情况也比较复杂复杂,所以要特别加以注意所以要特别加以注意,首先要判断一下是首先要判断一下是否应该用虚拟语气否应该用虚拟语气,因为条件句分为两种因为条件句分为两种,一一种是种是真实条件句真实条件句,一种是一种是非真实条件句非真实条件句,只有只有在

2、非真实条件句中才用虚拟语气在非真实条件句中才用虚拟语气,在真实条件在真实条件句中句中,要用陈述语气要用陈述语气。虚拟语气的介绍虚拟语气的介绍第3页，讲稿共40张，创作于星期三Observe the following sentences and tell Whether they are real or unreal conditional clauses.第4页，讲稿共40张，创作于星期三If we go on polluting the world,it wont be fit for us to live in.If you are busy doing your homework,I

3、wont interrupt you.If you have finished cleaning the classroom,you can go home now.(Under these conditions,the things are sure to happen.)第5页，讲稿共40张，创作于星期三If there were a lot of good restaurants in the city,this would make it more attractive.(There arent many good restaurant now.)If a lot of people

4、spoke English,it would be very helpful for tourists.(Not many people can speak English now.)第6页，讲稿共40张，创作于星期三非真实条件句的时态表达非真实条件句的时态表达如果假设的情况完全不存在或者实现的可能如果假设的情况完全不存在或者实现的可能性很小性很小,可以说几乎没有时可以说几乎没有时,就需要用虚拟语就需要用虚拟语气来表达气来表达,也就是说也就是说,这时的条件句是非真实这时的条件句是非真实的条件句。此时的句子时态比真实条件句中的条件句。此时的句子时态比真实条件句中的时态后退一步。的时态后退一步。第

5、7页，讲稿共40张，创作于星期三虚拟语气虚拟语气1.条件从句和主句中的虚拟语气条件从句和主句中的虚拟语气 时间时间从句从句 主句主句与与现在事现在事实实相反相反If+主语主语+动动词的过去式词的过去式(be-were)与与过去事过去事实实相反相反If+主语主语+had+过去分词过去分词主语主语+should/would/could/might+动词原形动词原形主语主语+should/would/could/might+have+过去分词过去分词第8页，讲稿共40张，创作于星期三与与将来事将来事实实相反相反If+主语主语+were to/(should)+动词原形动词原形主语主语+should/

6、would/could/might+动词原形动词原形第9页，讲稿共40张，创作于星期三注意：注意：在在if I/he/she/it 之后之后,可用可用were代替代替was。两。两者在意义上没有区别者在意义上没有区别,但是但是were更为正式更为正式,特特别是在称述心存怀疑的事情时别是在称述心存怀疑的事情时:If she were ready,we would go.第10页，讲稿共40张，创作于星期三在与将来事实相反的条件从句中在与将来事实相反的条件从句中,我们可以我们可以用用were to或或should+do来表示来表示,如如:If I were to fail my English t

7、est,I would have to take it again at the end of the term.If he should come tomorrow,I would talk to him about it.第11页，讲稿共40张，创作于星期三在非真实条件句中在非真实条件句中,如果有如果有were,had,should,我们可以将我们可以将if省略省略,把这些词置于把这些词置于句首句首,采用倒装形式采用倒装形式,如如:If I should meet her,I would tell her.=Should I meet her,I would tell her.虚拟条件句中

8、的省略与倒装虚拟条件句中的省略与倒装第12页，讲稿共40张，创作于星期三If I were in your position,I would do it better.=Were I in your position,I would do it better.If they had made preparations,they would have succeeded.=Had they made preparations,they would have succeeded.第13页，讲稿共40张，创作于星期三有时非真实条件句中有时非真实条件句中,主句谓语动词所表示主句谓语动词所表示的动作和条

9、件从句中谓语动词所表示的动的动作和条件从句中谓语动词所表示的动作并不同时发生作并不同时发生,这时动词的形式并不完全按这时动词的形式并不完全按照上述表格来进行照上述表格来进行,而需要按照各自的时间来而需要按照各自的时间来调整调整,这样的句子就叫错综时间条件句。这样的句子就叫错综时间条件句。错综时间条件句错综时间条件句第14页，讲稿共40张，创作于星期三e.g.If you had followed the doctors advice,then you would be all right now.If I hadnt finished my composition by now,I would

10、 be working on it tomorrow.If she had prepared well for her lessons yesterday,she wouldnt have so many difficulties now.第15页，讲稿共40张，创作于星期三有时一个假设的情况并不用条件从句表示有时一个假设的情况并不用条件从句表示,而用其它方式来表示而用其它方式来表示,这样的句子叫含蓄条件这样的句子叫含蓄条件句。句。1.用用with,without等介词短语或分词短语或等介词短语或分词短语或者独立主格结构来代替条件从句。者独立主格结构来代替条件从句。含蓄条件句含蓄条件句第16页

11、，讲稿共40张，创作于星期三e.g.We might have died without your help.=We might have died if you hadnt helped us.Having known in time,we could have stopped it.=If we had known in time,we could stopped it.第17页，讲稿共40张，创作于星期三在条件从句中除最常见的连词之外在条件从句中除最常见的连词之外,尚有尚有下列连词下列连词:otherwise;in case;but that;on condition that;unle

12、ss;suppose/supposing(that);so long as;provided/providing(that)2.用相当于用相当于if 的其他连词表示虚拟结构的其他连词表示虚拟结构第18页，讲稿共40张，创作于星期三e.g.I was busy last week,otherwise I would have come to see you.But that you had offered help,they couldnt have finished their work on time.第19页，讲稿共40张，创作于星期三I would have given you more

13、 money,but I was poor then.I would have called you,but I forgot your telephone number.3.3.通过上下文来虚拟通过上下文来虚拟第20页，讲稿共40张，创作于星期三固定句式的虚拟语气固定句式的虚拟语气should+动词原形动词原形;should可以省略：可以省略：demand,suggest,advise,propose,insist,order,request,desire,urge,deserve,recommend,intend等词后所跟的宾语从等词后所跟的宾语从句中句中第21页，讲稿共40张，创作于星期

14、三 It+be+suggested/demanded+that 引导引导的主语从句的主语从句 suggestion,proposal 引导的同位语从句引导的同位语从句 It is+important/necessary+that 从句从句 for fear that(惟恐惟恐)引导的从句中须引导的从句中须 用用should+动词原形动词原形第22页，讲稿共40张，创作于星期三固定句式的虚拟语气固定句式的虚拟语气,从句中用过去式从句中用过去式(从句中从句中,如果表示与现在事实相反如果表示与现在事实相反,谓语动词用过去式谓语动词用过去式;如果表示与过去事实相反如果表示与过去事实相反,谓语动词用过去

15、完谓语动词用过去完成式。成式。)as if,as though,wish,would rather,if onlyIts high(about)time+从句时从句时,从句谓语动词只从句谓语动词只能用过去式。能用过去式。第23页，讲稿共40张，创作于星期三(1)_ (2)_(3)_ (4)_ (5)_ (6)_(7)_ (8)_ (9)_ (10)_Answersattendedwentwould/might bewould/might seewould/could bedidhad travelledwould have to takewould not have neededtravell

16、ed第24页，讲稿共40张，创作于星期三My grandpas ifs1Had been2Had;got3Had;had/if;had had4Would;have been第25页，讲稿共40张，创作于星期三1._ for the free tickets,I would not have gone to the films so often.2.A.If it is not B.Were it not3.C.Had it not been D.If they were notPractice第26页，讲稿共40张，创作于星期三2.He came late,otherwise he _ th

17、e first bus.A.caught B.would catch C.would have caught D.had caught3.Mary was going to the wedding if her friend _ her.A.hadnt called on B.didnt call at C.didnt call on D.hadnt called at第27页，讲稿共40张，创作于星期三4.-Lets stop watching the boring TV programme,Jack!-If you dont watch it,I _,either.A.dont B.won

18、t C.am not D.stop第28页，讲稿共40张，创作于星期三5.-Shall I tell John about the bad news?-No,you _.I think that will make him sad.A.neednt B.wouldnt C.shouldnt D.mustnt第29页，讲稿共40张，创作于星期三6.Why did you throw the bottle out of the window?You _ somebody.A.might hurt B.could have hurt C.would hurt D.must have hurt 7.-

19、Mum,may I got out and play?-No,you _.A.wont B.dont C.arent able to D.cant第30页，讲稿共40张，创作于星期三8.From what I hear about their hotel and the weather,they _ their holiday very much.A.would have enjoyed B.shouldnt have enjoyed C.neednt have enjoyed D.cant have enjoyed 第31页，讲稿共40张，创作于星期三9.-Did you hear me c

20、ome in last night?-No,I _ asleep.A.cant be B.must be C.must have been D.couldnt have been第32页，讲稿共40张，创作于星期三10.-Ill pay you by cheque monthly.-Id rather you _ me cash weekly.A.pay B.will pay C.are to pay D.paid11.They didnt want to come with us at first.But then we _ persuade them.A.had managed to B.

21、were able to C.did try to D.would have to第33页，讲稿共40张，创作于星期三12.The doctor said,“Sir,you _ be sitting in this waiting room.Its for the children only.”A.oughtnt to B.cant C.mustnt D.wont第34页，讲稿共40张，创作于星期三13.-Did Wei Hua have breakfast before going to school yesterday?-No,but I think he _ have.A.will B.

22、may C.should D.must14.I would have informed her if possible,but I _ so busy.A.were B.had been C.was D.would be第35页，讲稿共40张，创作于星期三15.-No one was prepared for Mr.Hills questions.-I guess we _ the lesson last night.A.I would read B.ought to read C.should have read D.had read第36页，讲稿共40张，创作于星期三Magic LanternMagic BrushDiscussionWhat would you do if you had a?第37页，讲稿共40张，创作于星期三Time MachineOne million第38页，讲稿共40张，创作于星期三Homework 1.Finish Parts C1 and C2 on Page 116 in Workbook.2.Write a short passage about what would you do if you had .第39页，讲稿共40张，创作于星期三感谢大家观看第40页，讲稿共40张，创作于星期三