我不能肯定。

I can't be positive.

Source: Tatoeba

Sentence Composition

1 我 wǒ
  1. I
  2. me
  3. my
2 不能 bùnéng
  1. cannot
  2. must not
  3. should not
3 肯定 kěndìng
  1. to be certain; to be positive
  2. assuredly; definitely
  3. to give recognition; to affirm
  4. affirmative (answer)