2019届高三英语 复习---虚拟语气教学课件 （共16张PPT）

课件16张PPT。Subjunctive mood 虚拟语气定义： 英语中的语气分为陈述语气、祈使语气、虚拟语气三类。虚拟语气用来表示说话人的主观愿望或假想，所说的是一个条件，不一定是事实，或与事实相反。虚拟语气通过谓语动词的特殊形式来表示。◆真实条件句 The volleyball match will be put off if it ___.　 A.will rain　 B.rains　 C.rained　 D.is rained◆非真实条件句 1.与现在事实相反的假设。 if从句　　　　　 主句 didwere　 would (mightcould should) +v. 　 Eg. If they were here, they would help you.B2.与过去事实相反的假设。 if从句　　　 主句　　　　　 had +p.p.　would (mightcould should) have+ p.p. Eg. If she had worked harder, she would have succeeded.　 　 The rice would not have been burnt if you had been more careful.　 3.表示对将来情况的主观推测（可能相反或可能性很小） if从句　　　　　　 主句didwere　　　　　 were + to do would (mightcould should) +v. should + do　　　　 Eg. If you succeeded should succeed were to succeed, everything would be all right.◆混合条件句 （混合虚拟语气）主句与从句的动作发生在不同的时间，这时主、从句谓语动词的虚拟语气形式因时间不同而不同，这叫做混合条件句。例如：If you had asked him yesterday, you would know what to do now.（从句与过去事实相反，主句与现在事实相反。） If it had rained last night (过去), it would be very cold today (现在). ◆虚拟条件句的倒装 虚拟条件句的从句部分如果含有were, should, 或had, 可将if省略，再把were, should或had 移到从句句首，实行倒装。 _____ to do the work, I should do it some other day.A. If were I　　 B. I were　 C. Were I　 D. Was I CWere they here now, they could help us.=If they were here now, they could help us. Had you come earlier, you would have met him.=If you had come earlier, you would have met him.　 Should it rain, the crops would be saved.=Were it to rain, the crops would be saved.◆特殊的虚拟语气词：should 1） It is necessary / a pity + that…结构中的主语从句的谓语动词要用should 加动词原形， should 可省略。（注：常为表情绪、观点的形容词或名词，如:necessary. important. impossible. natural. strange. surprising, funny. right. wrong. better. a pity等。） Eg. It is necessary that he (should) come to our meeting tomorrow. 2）在宾语从句中的应用在表示命令、建议、要求等一类动词后面的从句中。【注：一想要(desire)一宁愿(prefer)二命令(order. command) 三建议(advise. suggest. propose) 五要求(demand. require. request. desire.insist)中】。无论主句谓语动词为何种时态，从句的谓语动词都用：“（should） + 动词原形”。Eg. I suggest that we (should) hold a meeting next week. He insisted that he (should ) be sent there. ◆如果suggest, insist不表示"建议" 或"坚持要某人做某事时"，即它们用于其本意"暗示、表明"、"坚持认为"时，宾语从句用陈述语气。◆在表语从句，同位语从句中的应用 在suggestion, proposal, idea, plan, order, advice等 名词后面的表语从句、同位语从句中要用虚拟语气，即 （should）+动词原形. My idea is that we (should) get more people to attend the conference. I make a proposal that we (should) hold a meeting next week. ◆wish的用法 1.表示与现在事实相反的愿望，谓语动词用过去式eg. I wish I had your brains.我希望我有你那样的头 ... ...