can't 是用于否定的推测.而must是用于肯定的推测的,mustn't用于关于禁止,不允许内容的句子.
1.That must be him.He said he would come yesterday.
2.That can't be her.She has gone to London.
There's no light on.they____be at home.
There's no light on.they____be at home.
A:can't B:mustn't C:needn't D:shouldn't
为什么用can't,而不用mustn't.mustn't不是表推测吗?
A:can't B:mustn't C:needn't D:shouldn't
为什么用can't,而不用mustn't.mustn't不是表推测吗?
英语人气:789 ℃时间:2019-11-17 02:15:45
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