These batteries are supposed to last for a year.
這些電池應該能用一年。
We were supposed to have gone away this week, but Debbie's ill so we couldn't go.
這週我們本該要走,但是戴比病了,所以我們走不了。
How am I supposed to (= how can I) find that much money by the end of the week?
我怎麼可能在週末之前籌到那麼多錢呢?