虚拟语气的用法
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状语从句中的虚拟语气
虚拟语气在if引导的条件句中的用法三点：
从句（条件）
主句（目的）
表示于现在事实相反的虚拟条件句
If+主语+动词的过去式（be用were）
If I had time, I would attend the meeting.
主语+would(should could might)+动词原型
表示与过去事实相反的拟条件句
If+主语+had+动词的过去分词
If he had hurried ,he could have caught the train.
主语+would（should could might）+have+动词的过去分词
表示与将来事实相反的虚拟条件句
1、If+主语+动词过去式
2、If+主语+were to+ 动词原形
3、If+主语+should +动词原形
If I were to go abroad ,I would go to America.
主语+would（could should might）+动词原型
错综时间条件句——主从句时间不一致的情况下的虚拟语气
有时条件从句中的动作与主句中的动作，发生的时间不一致，这是动作的形式应根据它所表示的时间加以调整。
If you had followed my advice , you would be better now.
If you had studied hard before, you would be a college student now.
含蓄条件句
有时虚拟条件句并没用if从句表示出来，而是用介词短语（otherwise，or，without，but for）上下文或其他方式来表示。
条件暗含在短语中；
条件暗含在上下文中；
虚拟式变为习惯说法，很难找出其暗含的条件。
条件从句中省略if采用倒装语序的情况
在if引导的表示虚拟的条件状语从句中，有时可以把虚拟条件中的连词if省去，而将had，should，were等助动词提到主语之前。
例：原句：1: If she were younger,she,would do it.
去if：Were she younger,she,would do it.
2: If you had come earlier, you would have met him.
去if: Had you come earlier, you would have met him
3:If it should rain tomorrow, we would not go climbing.
去if:Should it rain tomorrow, we would not go climbing.
虚拟语气在as if/as though引导的方式状语从句中
表示与现在事实相反或对现在情况有怀疑，谓语动词用过去式。
He treats the boy as if he were his own son.
表示与过去事实相反，谓语动词用过去完成时。
He spoke as if he had known about it.
表示与将来事实相反，(表示将来的可能性不大),用would (might, could)+ 内容过长，仅展示头部和尾部部分文字预览，全文请查看图片预览。 D. had done; must be set
7. Had you listened to the doctor, you _____ all
right now.
are????? B. were?? ? C. would be???
D. would have been
8. You _____ come earlier. The bus left a moment
ago.
?A. would????? B. should have??????? C. may????? D. have
CAAA ABCB
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