求英语语法虚拟语气例句A,对于过去已发生的事情的假设B对于现在发生的事情的假设C对于将来要发生的事情的假设.各举3个例句

与..事实相反 If从句 主句
过去 Had done Would* have done
现在 Were/did Would* do
将来 Should do/were/were to do Would* do
例句：If there hadn’t been much rain in spring,we would have had a good harvest now.[过去]
If he smoked less,his cough might be well soon.[现在]
If the lecturer should be late,you would have to make a speech first.[将来]

if i had troubled you
if i were troubling you
if i would be a teacher someday

If I had listened to her,I would win the game.
If i were you,I would go now.
If it did not rain tomorrow,we would go hiking.

A If I had taken your advice, I would have passed the exam.
B If I were you, I would do it at once.
C If it rained tomorrow, I would not come to meet him.