suppose to与be supposed to有什么区别?

suppose to与be supposed to有什么区别?
suppose to与be supposed to
有什么区别?

suppose to与be supposed to有什么区别?
前者是谓语动词结构
后者是系表结构
大致上无区别
只是前者注重某一个"动作"
而后者更注重一种状态