请问这句话为什么选Can't
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请问这句话为什么选Can't
She__________be ill because I saw her playing tennis just now.
A .can't B.couldn't
C.mustn't D.may not
我觉得must是极为肯定的推测,为什么不选呢
She__________be ill because I saw her playing tennis just now.
A .can't B.couldn't
C.mustn't D.may not
我觉得must是极为肯定的推测,为什么不选呢
must do sth 是说必须做某事
must not do sth 是说没必要一定做某事
must be 表示肯定的推测
当表推测时,它的否定形式 就是can not be 不能用must not be 没有这种说法,没有为什么...
must not do sth 是说没必要一定做某事
must be 表示肯定的推测
当表推测时,它的否定形式 就是can not be 不能用must not be 没有这种说法,没有为什么...
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