Present participle; Past participle - muscling - muscled Present - muscle - muscle - muscles - muscle - muscle - muscle Past - muscled - muscled - muscled - muscled - muscled - muscled Future - will muscle - will muscle - will muscle - will muscle - will muscle - will muscle Present conditional - would muscle - would muscle - would muscle - would muscle - would muscle - would muscle Present Perfect - have muscled - have muscled - has muscled - have muscled - have muscled - have muscled Past Perfect - had muscled - had muscled - had muscled - had muscled - had muscled - had muscled Future Perfect - will have muscled - will have muscled - will have muscled - will have muscled - will have muscled - will have muscled Past conditional - would have muscled - would have muscled - would have muscled - would have muscled - would have muscled - would have muscled Imperative - - - muscle - - - - - - - -