你既然已经知道了，还问什么？

If you already know, why are you still asking?

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 既然 jìrán since; as; this being the case
=3 已经 yǐjīng already
=3 已经 yǐjìng already
4 知道了 zhīdàole
  1. OK!
  2. Got it!
=5 还 Huán surname Huan
=5 还 hái
  1. still
  2. still in progress
  3. still more
  4. yet
  5. even more
  6. in addition
  7. fairly
  8. passably (good)
  9. as early as
  10. even
  11. also
  12. else
=5 还 huán
  1. to pay back
  2. to return
6 问 wèn to ask; to inquire
7 什么 shénme
  1. what?
  2. something; anything