一、虚拟语气在条件状语从句中的用法

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

did / were

had done

would/could/should/might +V.(原)

would/could/should/might+have+p.p.

1. did / were 2. should do 3. were to do

would/could/should/ might + V.(原)