以什么提问时,答句否定形式用mustn't?

问题描述:

以什么提问时,答句否定形式用mustn't?

以can 开头的问句,否定回答是can't 或者mustn't ,例如:
Can I swim in the river?我可以在这条河里游泳吗?
No,you can't .不,你不可以。
No,you mustn't .It's very dangerous .不,你千万不能,很危险。
以must 开头的问句否定回答是needn't 或者don't have to ,表示“不需要”,例如:
Must I finish my homework now?我必须现在完成家庭作业吗?
No,you needn't .=No,you don't have to . 不,你没有必要。

祝你开心。

mustn't表示语气非常强烈的禁令.绝不可以的意思1、在回答must开头的一般疑问句时,肯定回答用must,否定回答用needn't或don't have to.如:1)—Must I finish my homework before eight o'clock?—Yes,you must.2)—Mu...