精选优质文档-倾情为你奉上If 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。() 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were1. If I were you, I should study English. 2. I would certainly go if I had time.与过去事实相反would/should/could/might
