had KO'ed

• past perfect

  past perfect

  Used to express a completed action that took place before another specific past action occurred.

  of KO.
  KO

  noun

  a knockout in boxing.

had KOed

• past perfect

  past perfect

  Used to express a completed action that took place before another specific past action occurred.

  of KO.
  KO

  noun

  a knockout in boxing.

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