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英语
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Iisten!Helen is singing in the next room.It ( ) be Helen.She has gone to Beijing.A.mustn't B.can't
请说说musn't与can't的区别和用法
人气：489 ℃ 时间：2019-08-18 22:34:41
解答
用MUSTN'T的时候,是表示已经肯定了某事,这道题应该要选A的,因为后面那句话已经说了海伦已经去北京.
而如果用CAN'T的话,有带有可能,猜测的意思,带有不确定因素.
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