这厕所很脏。

Zhè cèsuǒ hěn zāng.

This toilet is filthy.

我的衣服脏了。

Wǒ de yīfu zāng le.

My clothing is dirty.

你的手很脏，先去洗一洗再吃饭。

Nǐ de shǒu hěn zāng, xiān qù xǐ yì xǐ zài chīfàn.

Your hands are very dirty, go wash them before eating.