cannot can't couldn't mustn't的问题1.cannot = mustn't 是不准?那can't呢?2.can是不能够,may是不可能 对不?3.cannot can't couldn't之间的不同
问题描述：
cannot can't couldn't mustn't的问题
1.cannot = mustn't 是不准?那can't呢?
2.can是不能够,may是不可能 对不?
3.cannot can't couldn't之间的不同
答
cannot 不能；无法
mustn't 不准；不允许；不可以
can't不能；不可以
can能,可以
may可能，可以；愿意
couldn't 不能
cannot=can't couldn't是can't的过去式
答
cannot是“不能”或“不可能”
mustn't是“不准”或“不要”（用于告诫）
can是“能够”或“可能”
may not 是“可能不”
cannot=can't couldn't是can't的过去式