苏东坡拿手菜是什么:can't be和mustn'be的区别(急)

来源：百度文库编辑：高校问答时间：2024/04/28 17:07:23

can't be和mustn'be的区别,我不懂,我现在初三做的题目为什么都用can'tbe,从来不能选mustn'be,难道没有mustn'be吗?
例题:Li Hong _____ be in shanghai because I saw him in BeiJing only 10 minutes ago.
A.mustn'be B.can't be
答案:B 为什么呢?请解释下,谢谢
我认为这是十分肯定的事,为什么不用mustn'be

mustn'be？
是mustn’t be吧……
我记得它不是推测用法
否定的推测用can't be
mustn’t be有个意思是禁止

can't be否定猜测
mustn'be主观不能

没这种用法

can't be和mustn'be的区别 can't be和mustn'be的区别 can't be和mustn'be的区别 can't be和mustn'be的区别(急) I mustn't be+人名对不对情态动词的can't和mustn't的区别 mustn't have done和can't have done 的区别? The key __ be Peter's.His is still in the lock.A, can't B.mustn't can't be helped 关于mustn't