677. I would have gone shopping if it hadn't rained. 如果不下雨，我本来要去买东西的。 

678. If you had gotten up earlier, you would have caught the train. 如果你早一点起床，你本来是可以赶上火车的。 

679. If I had written it down on my notebook, I would have worked it out correctly. 如果我把它记到笔记本上，我就可以把它正确算出来了。 

680. She wouldn't have seen me if I hadn't waved to her. 如果我不向她招手，她不会看见我的。 

681. I wish you had called me back the next day, as I had asked you to. 可惜你没有按照我的要求，在第二天给我回个电话。 

682. If you had asked for directions, you wouldn't have got lost. 如果你问一下路，就不会走丢了。 

683. If I had enough money, I would have bought that car. 如果我有足够的钱，我早就买下那辆车了。 684. Had I known you would come to see me, I wouldn't have gone to the cinema. 如果我知道你会来看我，我就不会去看电影了。 

685. Even if we could have taken a vacation, we might not have wanted to. 即使我们可以休假，我们也可能不去休呢。 

686. Everything would have been all right if you hadn't done that. 如果你没有那样做的话，一切都好办了。 

687. If I had known you wanted to go, I would have called you. 如果我知道你想去，我本会叫你的。 

688. Had I known you didn't have a key, I wouldn't have locked the door. 如果我知道你没有钥匙，我本不会锁门的。 

689. He would have gone with me, but he was ill. 他本来要和我一起来的，但是他病了。 

690. Looking back on it, I wish we hadn't given it up so easily. 回过头来看，我后悔我们不该这样轻易放弃的。