Present participle; Past participle - backfiring - backfired Present - backfire - backfire - backfires - backfire - backfire - backfire Past - backfired - backfired - backfired - backfired - backfired - backfired Future - will backfire - will backfire - will backfire - will backfire - will backfire - will backfire Present conditional - would backfire - would backfire - would backfire - would backfire - would backfire - would backfire Present Perfect - have backfired - have backfired - has backfired - have backfired - have backfired - have backfired Past Perfect - had backfired - had backfired - had backfired - had backfired - had backfired - had backfired Future Perfect - will have backfired - will have backfired - will have backfired - will have backfired - will have backfired - will have backfired Past conditional - would have backfired - would have backfired - would have backfired - would have backfired - would have backfired - would have backfired Imperative - - - backfire - - - - - - - -