A：Hey Jack, what are you doing in the washroom? You've been there for quite a while.
嗨，杰克，你在卫生间里干什么呢？你在里面好长一阵子了。
B：I'm sweeping the floor of the washroom.
我在给卫生间拖地呢。
sweep /swi?p/ v. 拖，打扫；扫视（其过去式是 swept /swept/）
◆ quite a while 好长一阵子，很长一段时间
打扫卫生间 clean the washroom
A：Why haven't you gone home yet?
你怎么还没回家呢？
B：Because it's my turn to clean the washroom today. I can't go home until I've finished that.
因为今天该我打扫卫生间了。我干完活才能回家。