[6] Talking about past possibilities 谈论过去可能发生的事

676. What would you have done last night if you hadn't had to study?
677. I would have gone on the picnic if it hadn't rained.
678. If you had gotten up earlier,you would have had time for breakfast.
679. If I had had time,I would have called you.
680. Would he have seen you if you hadn't waved to him?
681. If he had only had enough money,he would have bought that house.
682. I wish you had called me back the next day,as I had asked you to.
683. If you hadn't slipped and fallen,you wouldn't have broken your leg.