,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,真实条件句和虚拟条件句,真实条件句和虚拟条件句,1,if引导的虚拟语气课件,2,1.表示客观事实或真理,If you,freeze,water,it,turns,to ice.If you,eat,a lot of chocolate,you,put,on,weight.,真实条件句,从句 主句,if+一般现在时，一般现在时,1.表示客观事实或真理 If you freeze wa,3,2.,表示将来可能发生的事,If he,fails,in the exam,he,will let,his parents down.,You,will,certainly,succeed,if you,keep,on trying.,从句 主句（陈述句）,if+一般现在时，一般将来时（will+动词原形）,2.表示将来可能发生的事 从句,4,3.,给某人提建议或命令某人做某事,If you,feel,sleepy,go,to bed.,If you,want,to know how it works,read,the instructions.,从句 主句,if+一般现在时，祈使句,3.给某人提建议或命令某人做某事 If you fee,5,If,引导的虚拟条件句，即非真实条件句，表示条件句所表示的条件根本不可能实现或实现的可能性很小。根据动作发生时间的不同，含有非真实条件句的复合句的主从句的谓语动词采用不同的表达方式。具体分为三种情况：,虚拟条件句,If引导的虚拟条件句，即非真实条件句，表示条件句所表示的条件,6,时间,从句,主句,与,现在,事实相反,过去式,（,be,通常用,were,）,should,would,could +,动词原形,might,与,过去,事实相反,had+,过去分词,should,would,could +have+,过去分词,might,与,将来,事实相反,过去式（,be,通常用,were,）,should+,动词原形,were to+,动词原形,should,would,could +,动词原形,might,时间从句主句与现在事实相反过去式 should,7,一、与,现在,事实相反,If I,knew,his telephone number,I,would,tell you.,If I,were,you,I,wouldnt be,so proud.,一、与现在事实相反If I knew his telepho,8,二、与,过去,事实相反,1.If he,had taken,my advice,he,would not have made,such a mistake.,2.If I,had got,there earlier,I,would have met,her.,二、与过去事实相反1.If he h,9,三、与,将来,的事实相反,1.If there,were,a heavy snow next Sunday,we,would not go,skating.,2.If she,should come,I,would tell,her about the matter.,三、与将来的事实相反1.If t,10,The printer is of good quality.If it _break down within the first year,we,would,repair it at our expense.A.would B.shouldC.couldD.might,The printer is of good quality,11,2._,the forest fire would have been discovered much earlier.A.But for their careB.If they were careful C.Without their careD.If they had been more careful,2._,the forest fire would,12,4.The weather has been very hot and dry.Yes.If it had rained even a drop,things would be much better now!And my vegetables_.A.wouldnt dieB.didnt dieC.hadnt diedD.wouldnt have died,4.The weather has been very h,13,5.Had I known about the computer program,a huge amount of time and energy_.A.would have been savedB.had been savedC.will be savedD.was saved,5.Had I known about the comput,14,6.If we _ the other road,we might have arrived here in time for the meeting.A.takeB.had takenC.tookD.have taken,6.If we _ the other road,w,15,if引导的虚拟语气课件,16,Thank you!,Thank yo,17,