高三英语学习资料-虚拟语气.pptVIP

3. If only 谓语动词用一般过去式表示现在没有实现的愿望，用过去完成式表示过去没有实现的愿望，常译为“要是……就好了”。例如： If only she had known where to find you. If only I could speak several foreign languages! 4. It is (high, about) time…. 在该句型中，谓语动词用过去式，指现在或将来的情况，表示“早该干某事而已经有些晚了”。例如： It is high time that we were off. It is time that somebody taught you to behave yourself. It is about time that we should go to bed. 5. would rather 接从句，用虚拟语气。用一般过去式时，表示一个现在或将来的愿望；用过去完成式时，表示一个过去的愿望。例如： I’d rather you paid the money yourself. I’d rather she painted the wall green next time. I’d rather she hadn’t sent me the text message that day. 6. If it were not(had not been) for…. 在这个结构意为“如果没有（当时没有）……，表示同现在（过去）事实相反的假设。例如： If it were not for the rain, the crops would be ruined. If it had not been for the captain’s determination, the ship would have sunk. 7. 情态动词＋have done 有时，情态动词＋have done可用来对过去事实进行猜测，表示“本来该（能、需）做而没有做的事”，或表示“本来不该（能、需）做而做的事”等。例如： He should have told me earlier.(But he didn’t) I might have got into trouble. (But I didn’t) You needn’t have watered the flowers.(But you did) In those circumstances, we couldn’t have done better.(But we did) 8. in case in case 引导的从句既可用陈述语气，也可用虚拟语气，由should构成，should可以省略。例如： The game will be postponed in case it snows. The game will be postponed in case it (should) snow. in case it snows比in case it should snow可能性大些。 * * 虚拟语气 虚拟语气概述 虚拟语气用来表示说话人所说的话并不是事实，而是一种假设、愿望、怀疑或推测。例如： If I had time, I would certainly go to the movie with you. I wish I were a white cloud. 虚拟语气的用法 虚拟语气用在非真实条件句中 虚拟语气用在宾语从句中 虚拟语气用在表语从句、同位语从句中 虚拟语气用在主语从句中 wish和as if/though后的虚拟语气 虚拟语气用在其他句型中 非真实条件句中谓语动词形式 条件从句 主句 与现在事实相反 If sb.+过去式（be的过去式是were） sb.+ would　(should, could, might)+动词原形 与过去事实相反 If sb.+ had done sb.+ would　(should, could, might) + have done 与将来事实可能相反 If sb.+ A. 过去式 　　　B. were to do C. should +动词原形 sb.+ would　(should, could, might) +动词原形 例句 If I were rich enough, I would travel around the world. If he had got up earlier, he could have caught the train 与