Good observation, thanks for sharing(^_^*)

来源: 于 2014-04-12 19:46:58 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

有时孩子会问can I have this? 大人会让他们说May I have this? 看来这些may,can, could, should 还是有细微的差别。