must的否定式是musn't还是mustn't
must的否定式是musn't还是mustn't
为什么must be的否定式是can't be而不是mustn't be
must的反义疑问句 是mustn't还是don't
为什么must的否定式要用can’t或者needn’t?may要用can’t
must的回答什么时候用musn't
Musn't 为什么不可以写成 Must'nt或者 Mustn't
must的否定式是什么?
I like to play football的否定式是I don’t like to play football还还是
否定式中没有动词用not还是don't
前面是must的句子,.改成反意疑问句是加mustn't he 还是needn't he
must的否定回答可以是mustn't吗
have to的否定式是不是don't.have.to