为什么你姐姐不好？

Why is it not okay if it's your sister?

Source: Tatoeba

Sentence Composition

1 为什么 wèishénme
  1. why?
  2. for what reason?
=2 你 nǐ you (informal, as opposed to courteous 您 nín)
=2 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.)
3 姐姐 jiějie older sister

classifier: 個
=4 不好 bùhǎo no good
=4 不好 bùhào to dislike; to be uninterested in