高考英语总复习 语法专题复习课件(第九讲)虚拟语气(16页).ppt
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1、第九讲第九讲 虚拟语气虚拟语气考点透析1虚拟语气在非真实条件句中的用法。时间if从句动词主句动词与现在事实相反did(be改为were)should/could/mightdo与过去事实相反haddone would havedone 与将来事实可能相反did/should do/were to dowould/coulddo例如:If she were here,everything would be all right.(But she isnt here now.)If you had come five minutes earlier,you would have met the fa
2、mous pop singer.If it were to rain tomorrow,the outing would be cancelled.If you should visit our school tomorrow,you would see how beautiful it is.2wish宾语从句(宾语从句中的动词变化如下表)。时间动词形式例句与现在事实相反的愿望did(be改为were)I wish I were ten years younger.与过去事实相反的愿望had过去分词He wishes he had gone to the concert last night
3、.将来难以实现的愿望would/might/could动词原形The last chance has been lost.How he wishes he could have another chance.3.在非真实条件状语从句中,如果含有were,had,should,可将if省去,将were,had,should放在主语前,构成倒装。例如:(1)What would have happened had Bob walked farther,as far as the river bank?(2)Should I fail this time,I would wait for anoth
4、er chance.4在非真实条件状语从句中,有时条件从句与主句动作发生的时间是不一致的,这时动词的形式要根据动词所表示的时间来调整。这种非真实条件句叫混合虚拟条件句。例如:(1)If you had worked harder,you wouldnt be afraid of the examination now.(2)If he had followed the doctors advice,he would be quite all right now.5有时假设的情况并不是以条件从句表示,而是通过一些介词短语或上下文等方式表现出来,这种句子叫含蓄虚拟条件句。or,otherwise,
5、with,without,but for(要不是),under 等词经常出现在含蓄虚拟条件句中。例如:(1)He hesitated for a moment before kicking the ball,otherwise he would have scored a goal.(2)Without electricity human life would be quite different today.(3)Under more favorable conditions,the rice would grow much better.(4)But for your help,I wou
6、ld still be working in the lab now.6情态动词的完成式大多能表示过去的虚拟事实(请参阅“情态动词”)。7在下列句型中动词要用虚拟语气:if it were not for要不是因为,if it had not been for要不是因为,if only要是就好了!(表强烈愿望)(1)If only he were here!要是他在这就好了!(2)If it had not been for the snow,we could have climbed the mountain yesterday.要不是下雪,我们昨天就会去登山。(3)If only he h
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