If 虚拟条件句 分三种时态:与现在事实相反、与过去事实相反、与将来事实相反
*条件句有真实条件句和非真实(虚拟)条件句两种
真实条件句的假设是有可能发生的,而非真实条件句的假想与事实相反或不大可能会发生,试比较: If I have time, I will go with them
假若我有时间,我就同他们去
(陈述语气) If I had time, I woudl go with them
假若我有时间,我就同他们去
(虚拟语气) 这是对现在事实的虚拟,事实是我没有时间,所以我没有和他们去 If 条件句虚拟 时态类型 主句 If 引导的从句 例句 与现在事实相反 would/should/could/might+ V原 动词过去式 did *be 多用were 1
If I were you, I should study English
I would certainly go if I had time
与过去事实相反 would/should/could/might + have done 动词过去完成式 had done 1
If you had taken my advice, you would not have failed in the test
If I had left a little earlier, I would have caught the train
与将来事实相反 would/should/could/might + V原 ①动词过去式 ②should +V原 ③were + to do 1
If you came tomorrow, we would have the meeting
If it were to rain tomorrow, the meeting would be pu