Present participle; Past participle - gangrening - gangrened Present - gangrene - gangrene - gangrenes - gangrene - gangrene - gangrene Past - gangrened - gangrened - gangrened - gangrened - gangrened - gangrened Future - will gangrene - will gangrene - will gangrene - will gangrene - will gangrene - will gangrene Present conditional - would gangrene - would gangrene - would gangrene - would gangrene - would gangrene - would gangrene Present Perfect - have gangrened - have gangrened - has gangrened - have gangrened - have gangrened - have gangrened Past Perfect - had gangrened - had gangrened - had gangrened - had gangrened - had gangrened - had gangrened Future Perfect - will have gangrened - will have gangrened - will have gangrened - will have gangrened - will have gangrened - will have gangrened Past conditional - would have gangrened - would have gangrened - would have gangrened - would have gangrened - would have gangrened - would have gangrened Imperative - - - gangrene - - - - - - - -