关于have to/must be与don't have to/can't behave to与must bedon't have to与can't be的意思一样,在使用过程中有何区别

问题描述:

关于have to/must be与don't have to/can't be
have to与must be
don't have to与can't be
的意思一样,在使用过程中有何区别

have to表示不得不
must be 必需做
don't have to 不必做
can't be 不能做