摘要:我能考试及格. After studying that you will be able to sovle these mathematics problems . 学习完这个方法后.你能够解这些数学题了. ②在否定句结构中.be able to 指暂时的情况.而can可以指经常的情况. He is not able to swim today .他今天不能游泳. He can't swim at all .他根本不会游泳.

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