dare和need作为情态动词（后接动词原形）的反意疑问句,疑问部分常用 need (dare ) +主语.
We need not do it again,need we
He dare not say so,dare you?
当dare,need 为实义动词（敢,需要）时,疑问部分用助动词do + 主语.
She doesn't dare to go home alone,does she?
must特殊些
当作"必须"时,用needn't提问
You must go now,needn't you?
当是mustn't(不允许,禁止)时,用must/may提问.
You mustn't smoke here,must/may you?
当must表推测,译为“一定,准是”时,要将句子改为i am sure that从句,反义疑问部分的动词形式根据be sure后的宾语从句的谓语动词形式决定.
例如,You must be hungry→i am sure that you are hungry,aren't you?
→原句变为You must be hungry,aren't you?