Is it correct to say 'He is the one that did it' instead of saying 'He is the one who did it' ?

  • Why not "He did it"? – Elliott Frisch Jan 14 '14 at 4:59
  • The question is not what is the best way to say it,I am questioning using what in this situation is grammatically correct. – Richard Jan 14 '14 at 6:04
  • He is the one that did it, or he is the one who (has) done it. But the second might only apply to mystery novels. – Elliott Frisch Jan 14 '14 at 6:10

Yes, that is grammatical. That can have a human antecedent when it introduces a defining relative clause, as it does in your example.

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