发一个简单的知识点~非真实条件句的虚拟语气.
三种情况,
⑴与现在事实相反:从句用if sb. did/were 主句用sb. would/should/could/might do
⑵与过去事实相反:从句用if sb. had done主句用sb. would/should/could/might have done
⑶与将来事实相反:从句用if sb. did/were或if sb. should do或if sb. went to do 主句用sb. would/should/could/might do.
另外,用虚拟语气可进行部分倒装,倒装句的相关内容以后会介绍的~