沒人知道為什麼。

Nobody knows why.

Source: Tatoeba

Sentence Composition

=1 沒 méi (negative prefix for verbs) have not; not
=1 沒 mò
  1. drowned
  2. to end
  3. to die
  4. to inundate
2 人 rén person; people

classifiers: 個, 位
3 知道 zhīdào
  1. to know; to become aware of
  2. also pr. zhīdao
4 為什麼 wèishénme
  1. why?
  2. for what reason?