Present participle; Past participle - extinguishing - extinguished Present - extinguish - extinguish - extinguishes - extinguish - extinguish - extinguish Past - extinguished - extinguished - extinguished - extinguished - extinguished - extinguished Future - will extinguish - will extinguish - will extinguish - will extinguish - will extinguish - will extinguish Present conditional - would extinguish - would extinguish - would extinguish - would extinguish - would extinguish - would extinguish Present Perfect - have extinguished - have extinguished - has extinguished - have extinguished - have extinguished - have extinguished Past Perfect - had extinguished - had extinguished - had extinguished - had extinguished - had extinguished - had extinguished Future Perfect - will have extinguished - will have extinguished - will have extinguished - will have extinguished - will have extinguished - will have extinguished Past conditional - would have extinguished - would have extinguished - would have extinguished - would have extinguished - would have extinguished - would have extinguished Imperative - - - extinguish - - - - - - - -