Present participle; Past participle - muffling - muffled Present - muffle - muffle - muffles - muffle - muffle - muffle Past - muffled - muffled - muffled - muffled - muffled - muffled Future - will muffle - will muffle - will muffle - will muffle - will muffle - will muffle Present conditional - would muffle - would muffle - would muffle - would muffle - would muffle - would muffle Present Perfect - have muffled - have muffled - has muffled - have muffled - have muffled - have muffled Past Perfect - had muffled - had muffled - had muffled - had muffled - had muffled - had muffled Future Perfect - will have muffled - will have muffled - will have muffled - will have muffled - will have muffled - will have muffled Past conditional - would have muffled - would have muffled - would have muffled - would have muffled - would have muffled - would have muffled Imperative - - - muffle - - - - - - - -