我不知道该说什么。

I don't know what to say.

Source: Tatoeba

Sentence Composition

1 我不知道 wǒbùzhīdào I don't know.
2 该 gāi
  1. should
  2. ought to
  3. probably
  4. must be
  5. to deserve
  6. to owe
  7. to be sb's turn to do sth
  8. that
  9. the above-mentioned
=3 说 shuì to persuade
=3 说 shuō
  1. to speak; to talk; to say
  2. to explain; to comment
  3. to scold; to tell off
  4. (bound form) theory; doctrine
=3 说 shuō variant of 说 shuō
4 什么 shénme
  1. what?
  2. something; anything