高中英语语法虚拟语气复习（共24张PPT）

虚拟语气用法小结 条件从句 If 从句的谓语形式 主句的谓语形式 现在 过去 未来 过去时（were） 过去完成时 would/could/should/might +do would/could/should/might+have+done 1.过去时2.should+do 3. were to do would/could/should/might +do 1.If引导的非真实条件句 例如： If I were you, I would consider their proposal. ( 与现在事实相反) If I were to do it, I would do it another way. (与将来事实相反) She would have come if she hadn’t been so busy. (与过去事实相反) 2.Suppose / supposing相当于what if可引出虚拟条件句 Suppose I accepted this offer. 假如我接受这个帮助，你会怎么说。 Supposing the train were late, what should we do? 假如火车晚点，我们怎么办？ 3. 如果条件句中的渭语动词含有were, had或should, 有时可省略if, 将were, had或should移至主语的前面。 Had he come a little earlier, I might have met him. Were he to leave tomorrow, I would go with him. Should it rain tomorrow, the crops would grow well. 4. 错综时间的虚拟条件句 句中主、从句的虚拟语气的形式，根据主、从句不同的时间情况用适当的形式来表示。 If you had spoken to him last time you saw him, you would know what to do now. 如果你上次看到他时跟他说一下，现在就知道怎么做了。 If I were you, I wouldn’t have missed the film last night. 要是我是你，我就不会错过昨晚的那场电影了。 5