职场英语流行美语对话：be supposed to 认为应该，必须;认为可以
此语用被动语态表示"被许多人相信",如：The castle is supposed to be haunted.(人们都说那座城堡闹鬼。)此语在口语中表示"认为可以做某事",如：None of us girls is supposed to smoke.(我们女孩子都不吸烟。)此语中的supposed是动词的过去式，supposed作为形容词，意指"假定的，被信以为真的，想象中的".
A: The train was supposed to get to Beijing at eight o'clock. 火车该八点钟到北京。
B: Eight o'clock? It's already eight-thirty. 八点?现在都八点半了。
A: What if he didn't see us? 要是他没看见我们怎么办?
B: He would take a taxi, I think. 他会打出租车的。
A: Maybe the train is late. 不会是火车晚点了吧。
B: It is impossible. I have heard the broadcast. 不可能。我已听见广播了。