你还没洗手，不是吗？

You haven't washed your hands yet, have you?

Source: Tatoeba

Sentence Composition

=1 你 nǐ you (informal, as opposed to courteous 您 nín)
=1 你 nǐ you (Note: In Taiwan, 妳 is used to address females, but in mainland China, it is not commonly used. Instead, 你 is used to address both males and females.)
2 还没 háiméi not yet
3 洗手 xǐshǒu
  1. to wash one's hands
  2. to go to the toilet
4 不是吗 bùshìma isn't that so?