莫非

mòfēi
  1. can it be possible that
  2. could it be

CEDICT

Entry Composition

1 莫 mò
  1. do not
  2. there is none who
2 非 fēi
  1. to not be; not
  2. wrong; incorrect
  3. non-; un-; in-; de-
  4. to reproach; to blame
  5. (coll.) to insist on; simply must