第九周 情态动词
一、can, could与be able to的用法
①I'm going to Europe on vacation together with John if I can find the money.(现在的能力)(2012·全国卷Ⅱ)
如果我现在能弄到足够的钱，我将和约翰一起去欧洲度假。
②If you have a good sleep, you will be able to work out this problem.(将来的能力)
如果你好好睡一觉，你将能够解出这道题。
③The fire spread through the hotel very quickly but everyone was able to get out.(过去有能力做并且成功地做了某事)
尽管这场大火迅速蔓延到了整个宾馆，但是每个人都逃了出去。
④I could have worked out the problem, but I was too nervous.(本来有能力做但未做)
我本来可以解决这个问题，但我太紧张了。
⑤How could you do such a silly thing?
你怎么能做那样的蠢事呢？
