1. can ﹠ could:
1). 表示____: eg. The girl can dance very well.
3) 表示_________ ,常用于否定句和疑问句: Can it be true? ________ Today is Sunday. He can't be at school _______ 4)表示“_______”: Jogging can be harmful to the health. 5) 表__________(用在疑问句中): How could you do such a silly thing?
2). 表示 ___________(could 比can委婉): eg. Can/Could I borrow your book? Yes, you can. / No, I’m afraid not.
能力
请求或许可
推测
有时会
惊讶、怀疑
不可能
可能