s. required or under orders
s. mistakenly believed
a. 想象上的, 假定的, 被信以为真的
[法] 推测的, 想像的, 被信以为真的
1. I was supposed to finish my homework yesterday.
我本该昨天完成我的作业。
2. She is supposed to arrive at the airport by 5 PM.
她应该在下午五点之前到达机场。
3. We are supposed to meet at the cafe for lunch.
我们应该在咖啡馆见面吃午饭。