We use brooms to clean the room.

我们用扫帚打扫房间

So easy to clean the room!

这个房间那么容易清洁！

Let him (them) clean the room.

让他(他们)去打扫房间吧。

Who can help me clean the room?

答案：谁能帮我打扫房间？

His plan is to clean the room.

他的计划是打扫房间。

Did he clean the room yesterday?

他昨天打扫房间吗？