虚拟语气用法讲解课件.ppt
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1、关于虚拟语气用法讲解现在学习的是第1页,共36页英语中的三种语气英语中的三种语气陈述语气陈述语气:用于陈述事实。祈使语气祈使语气:用于提出请求、命令等。虚拟语气虚拟语气:表示说话人说的不是事实而是一种假设、猜想等。表示说话人的愿望、要求、命令、建议等。现在学习的是第2页,共36页一一.虚拟语气在条件从句中的用法虚拟语气在条件从句中的用法条件句有两类,一类是真实条件句,一类是虚拟条件句有两类,一类是真实条件句,一类是虚拟条件句。条件句。(1)真实条件句)真实条件句:假设的情况是有可能发生的。If it doesnt rain tomorrow,we will go to the park.(2)
2、虚拟条件句:假设的情况是过去或现在都不存虚拟条件句:假设的情况是过去或现在都不存在的,或将来都不可能发生的。在的,或将来都不可能发生的。If he had seen you yesterday,he would have asked you about it.现在学习的是第3页,共36页1.与现在事实相反与现在事实相反从句从句-过去式过去式(be通常用were),主句主句-should(would,could,might)+动词原动词原形形”:If I knew her number I could ring her up.If he were free,he would help us.Sh
3、ould用于第一三人称用于第一三人称would表示结果,表示结果,might表示可能性,表示可能性,could表表示能力、允许或可能性示能力、允许或可能性 现在学习的是第4页,共36页If I had a lot of money I would buy a villa.现在学习的是第5页,共36页1.如果我是只鸟,我就能在天上飞了。如果我是只鸟,我就能在天上飞了。I f I were a bird,I could fly in the sky.2.If I _(有有)a knife,I _(就杀了就杀了)you。hadwould kill现在学习的是第6页,共36页2.与将来事实相反或将来的
4、愿望推测与将来事实相反或将来的愿望推测从句从句-did/should+do/were to do主句主句-should/would/could/might+do 现在学习的是第7页,共36页If he got up early,he would be on time.现在学习的是第8页,共36页3、与过去事实相反、与过去事实相反从句从句had done主句主句should/would/could/might+have done现在学习的是第9页,共36页If he _ more carefully,he _ the car accident yesterday.had driven would
5、 not have had 现在学习的是第10页,共36页虚拟语气在条件状语从句中的用法总结时态时态If 从句的谓语形式主句的谓语形式现在过去未来did/werewould/could/should/might+V.(原)would/could/should/might+have+p.p.1.did/were2.should do3.were to dowould/could/should/might+V.(原)had done现在学习的是第11页,共36页二:二:交叉虚拟交叉虚拟 主从句动作发生的时间不同主从句动作发生的时间不同时,按时间来确定虚拟形式。时,按时间来确定虚拟形式。If the
6、 weather had been better,the crops would be growing still better.现在学习的是第12页,共36页If it were not for your advice,we couldnt have got over the difficulties.Were it not for your advice,we couldnt have got over the difficulties.现在学习的是第13页,共36页当当If条件句中有条件句中有were,had,should这三个助动词时,可将这三个助动词时,可将If省略,从而将这三个助动
7、词放到省略,从而将这三个助动词放到句首。句首。现在学习的是第14页,共36页without和和but for 构成虚拟。构成虚拟。(but for要不是要不是)Without sunlight,peoples life would be difficult.But for your help,I wouldnt have finished the work.现在学习的是第15页,共36页 otherwise,or,or else等的虚拟用法等的虚拟用法 She wasnt feeling very well.Otherwise she wouldnt have left the meeting
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