Your room is in a mess. Please tidy it up.

你的房间那么乱，收拾一下吧。

Your room is in a mess, please tidy it up.

你的房间那么乱，收拾一下吧。

His room is in a clutter so I have to tidy it up.

他的房间乱七八糟的，我不得不整理一下。

Just shampoo it and tidy it up a bit, please.

就只要洗一洗，然后梳理一下。

Tidy it up.

把它整理好。