可用现在时态
I can tell you the secret,if you promise that you will keep it between us.
但是虚拟语气中就不一定了
I would have stayed home,if i knew it was going to rain.
条件状语从句主句是情态动词,从句用什么时态啊?
可用现在时态
I can tell you the secret,if you promise that you will keep it between us.
但是虚拟语气中就不一定了
I would have stayed home,if i knew it was going to rain.