Could you cover for me on Tuesday? I'm not coming back until Wednesday.
你星期二可以幫我代班嗎?我要到星期三才回來。
Sure. What's up?
當然可以,有什么事嗎?
He substituted for his colleague who was ill.
他為生病的同事代班。
Rose will cover for me while I'm away.
我不在的時候,羅斯會幫我代班。
My colleague agreed to cover for me during my vacation.
我的同事答應我休假的時候幫我代班。