0 to have to; to have a duty or a responsibility to -- 应该,应当
1 to be intended to -- 被期望,应该,预期
2 used to show that you do not believe that something or someone really is what many other people consider them to be -- 据说的,所谓的
The whole conference was totally disorganized - nobody knew what they were supposed to be doing.
The appointments are supposed to be made without fear or favour.
You know full well that you're not supposed to go there without asking me!
You're supposed to put the handbrake on whenever you stop on a hill.
I was supposed to be working this evening but what the hell - I'll see you in the pub in half an hour.
The cost of living in the city is more expensive, but salaries are supposed to be correspondingly higher.
This new video-recorder is supposed to be foolproof.
Cats are supposed to have nine lives.