情态动词must的用法,举个例子!

问题描述:

情态动词must的用法,举个例子!

i must do homework . must i do so ? yes , you must

you must finish it before I come back

must是情态动词,没有人称或数的变化,后接动词原形,其主要用法如下:1.表示义务或必要性,意思是“应该、必须”,通常用于肯定句及疑问句.如:You must go to bed now.你现在必须睡觉了.Must I start at once?我必须立...