高中英语复习北师大版《虚拟条件句》 课件 (共20张PPT).ppt

1、虚拟条件句Second ConditionalCompare and find the difference.If I have time tomorrow,I will go with you.If I were a bird,I would fly high to touch the cloud.If I were in shenzhou-11,I would bedoing scientific research.If I get more information,I will tell you immediately.a facta wisha facta wish虚拟条件句的要点1、

2、虚拟条件句的常态句2、虚拟条件句的省略倒装句3、错综时间条件句 4、含蓄条件句5、虚实结合1、虚拟条件句的常态句1 和现在事实相反 2.和过去事实相反 3.和将来事实相反If you didnt have to go to school today,what would you do?If I didnt have to go to school,I might have a sound sleep.If it were Sunday,I would be excited.与现在事实相反：从句谓语用动词过去式（be动词用were）主句谓语用would/could/should/might+动词

3、原形If hehad finished his homework,his motherwouldnt have been angry yesterday.If he hadnt given up then,he would have got worse injured.If he hadnt been encouraged many times,he wouldnt have succeeded.与过去事实相反：从句谓语用had+动词过去分词主句谓语用would/could/should/might +have+过去分词 If you were to meet with difficultie

4、s in the future,would you stick to your goal?If it should snow/snowed tomorrow,we would have a snowball fight.与将来事实相反：从句谓语用动词过去式(be动词用were)或were to+动词原形或should+动词原形主句谓语用would/could/should/might+动词原形时间if 条件句谓语主句 谓语现在过去将来Fill in the blankswould/could/should/might+动词原形动词过去式(be动词用were)had+过去分词would/coul

5、d/should/might+have+过去分词would/could/should/might+动词原形动词过去式should+动词原形were to+动词原形2、虚拟条件句的省略倒装句如果虚拟条件句的谓语部分有were，had(完成形式）和should时，可省略if，把were，had和should放到从句主语前面去，构成倒装，多见于书面语。省略if 把were，had或should提前I would do it better were I in yourPosition.1.If he had known your telephone number yesterday,he would

6、have telephoned you.=Had he known your telephone number yesterday,he would have telephoned you2.If I were in your position,I would do it better.=Were I in your position,I would do it better.3.If it rained,the crops would be saved.4.If it werent for the expense,I would go to Paris.Were it not for the

7、 expense,I would go to Paris._five minutes earlier,you could have seen them off.A.If you should arrive B.If you arrive C.Had you arrived D.Should you arrive _it rain tomorrow,we should put off the visit to the Science Museum.A.were B.should C.would D.might3.错综时间条件句当条件从句谓语动词与主句谓语动词所表的时间不一致时，虚拟语气的形式应作

8、相应的调整。主句和从句的谓语动词并不相互呼应，这种条件句叫混合条件句。较多见的混合型条件句是从句用过去完成时（指过去行为），而主句用一般时（指目前状态）。如果你之前努力学习了，你现在就不会因为即将到来的月考着急了。If you had studied hard before,you would not worry about the coming exam.如果你采纳了她的建议，你现在就会是个百万富翁了。If you had taken her advice,you would bea millionaire now.如果她被及时送进医院，现在应该很健康了。If she had been se

9、nt to hospital in time,she would be better now.4、含蓄条件句 虚拟条件句中的条件从句有时不表出来，只暗含在上下文中，这种句子叫做含蓄条件句。条件暗含在介词短语 连词 副词如without,but for,but,or,otherwise中解题时要把握语境，分析与何种事实（过去、现在和将来）相反。Without air,the world would be different._,the world would be different.But for the storm,we _ earlier.If it hadnt been for the

10、storm,we should have arrived earlier.Jack cant have arrived yet;_ he would have telephoned me.=Jack cant have arrived yet;if he had arrived,he would have telephoned me.=If there were no air 条件暗含在介词 短语 连词 副词中。should have arrivedotherwise5、虚实结合在同一个情境下，兼有对虚拟和真实情况的描述虚实结合条件句真实语气+otherwise/or+虚拟语气1.She_ i

11、ll yesterday,or she wouldnt have left the meeting so early.Would have knownwas2.He telephoned me to inform me of your birthday,otherwise I _ nothing about it.3.I should have returned the book last week,_ I was so busy that I forgot to do so.but虚拟语气+but+真实语气4.He _(do)the work well,but he was so careless.could have doneHe drove after getting drunk,otherwise,he wouldnt have had a car accident.But for his being drunk,he wouldnt have had a car accident.Tom had a car accident because he drove after getting drunk.If Tom hadnt driven after getting drunk,he wouldnt have had a caraccident.