be supposed to 的用法 举例说明

be supposed to 表示“理应。。。。？”强调客观上，“猜想会....... ”常用于被动语态中
You are supposed to liten to your boss.
He is supposed to work hard.
be supposed to还有“据说”（=be said to)
Let's go and see that film.It's supposed to be very good.
2、计划、安排 The train was supposed to arrive at 11:30,but it was 40 minutes late.
3、be not supposed to 表示不允许等
You're not supposed to park here.

被动的假设,期望,认为等
表示认为应该......
You're not supposed to take the books out of the room.
这些书不能拿出屋去。