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1、高二英语 Unit 8 The First Aid 课件包,北京市东城区课件共享工程系列课件展播 项目负责人：北京市东城区教研中心 陈鸽 课件设计制作：北京市第24中学 韩丽卫 范文林,Grammar 虚拟语气在条件状语中的用法： 对现在情况的假设（与现在事实相反）： if从句中的谓语动词用一般过去时，如果动词是be，一律用were），主语中的谓语动词用should/would/could/might + v. eg. If I were you , I would go to the party. If I knew the secret, I would tell you.,2. 对过去情
2、况的假设（与过去事实相反）：if从句中的谓语动词用had + done主语中的谓语动词用should/would/could/might + have + done eg. If I had not studied hard, I would have failed in the exam. 3. 对将来情况的假设（与将来事实相反）：if从句中的谓语动词可以用三种形式，即should + v., were to + v.，和动词的过去式连用，主语中的谓语动词用should/would/could/might + v.,eg. If I were to go to the moon some d
3、ay, I could see the surface of the moon with my own eyes. =If I should go to the moon some day =If I went to the moon some day,eg. 1.If you _(not sleep) with the window open, you would not have caught a cold. 2.If you were to do it, the results _(be) beyond everyones expectation. 3.If I were you, I
4、_(go) to the theatre yesterday.,had not slept,would be,would have gone,虚拟语气在简单句中的用法： It would be better for you not to stay up too late. _ you be kind enough to open the door? A. Would B. Might C. May D. Can,A,情态动词的过去式用于现在时态的句子中，表示说话人的谦虚礼貌或委婉的语气，常见于日常对话中。,May you be happy! May good luck be yours!,Ma
5、y + 动词原形表示“祝愿”“但愿”，但此时必须置于句首。,用动词原形表示“祝愿”之意。 e.g. “God bless you,” said the priest.,Long lives our great motherland.(选出错误选项) A B C D,As if 的用法： as if =as though,其从句中是否虚拟语气，视情况而定。如果从句中描述的是非现实情况，则多用虚拟语气；如果从句中是现实情况，则不用虚拟语气。,She always talks to me as if she were my sister. He walked slowly as if he had
6、hurt his leg. She looks as if shes going to cry.,情态动词+have done的结构 “would/could/should/need/might/ought to have+过去分词”，表示过去应该做而实际未发生的事，或表示对过去的遗憾，责备或谴责等。,You should have told us earlier. You could have been here five minutes ago. You ought not to have refused.,情态动词在would rather后接从句的应用,Id rather she hadnt done that.,Id rather you painted the wall green next time.,Id rather you paid me now.,(从句用过去完成时指过去),(从句用过去时指将来),(从句用过去时指现在),(此句中的would可看作是表愿望的实意动词),
