Could you cover for me on Tuesday?

你星期二能帮我代班吗？

cover 覆盖；遮住

cover sth with sth

用...遮住...

cover his face with hands.

用手遮住脸

cover for sb

代替某人工作（因为某人生病或离开）；包庇某人

I covered for him when he was ill.

他生病的时候是我替他的班。

Why would she cover for someone who was trying to kill her?

她为什么要包庇那个试图杀死她的人呢？

A:Could you cover for me on Tuesday? I'm not coming back until Wednesday.

你星期二能帮我代班吗？我要到星期三才回来。

B:Sure.What's up?

当然可以。有什么事情吗？

A:We're going to the beach for the weekend.

我们周末要到海边去玩。

B:Are you going fishing?

你要去钓鱼吗？

A:No.Just some fun in the sun. We really need to get away and relax for a few days.

不，只是去晒晒太阳。我们真的需要去放松几天了。

B:Well,don't worry .I'll take care of the business for you. Have fun.

不要担心，我会替你做好工作的。你好好的玩吧。