have to和must的用法有区别么?

问题描述:

have to和must的用法有区别么?
如果有区别,请分别举个例子来说明.

must表示主观,have to表示客观.We must help each other.My sister is ill,my mother has to look after her.must的用法 1)表示主观的义务和必要,主要用于肯定句和疑问句,意思为“必须……,得……,要……”;由must...