Present participle; Past participle - ferruling - ferruled Present - ferrule - ferrule - ferrules - ferrule - ferrule - ferrule Past - ferruled - ferruled - ferruled - ferruled - ferruled - ferruled Future - will ferrule - will ferrule - will ferrule - will ferrule - will ferrule - will ferrule Present conditional - would ferrule - would ferrule - would ferrule - would ferrule - would ferrule - would ferrule Present Perfect - have ferruled - have ferruled - has ferruled - have ferruled - have ferruled - have ferruled Past Perfect - had ferruled - had ferruled - had ferruled - had ferruled - had ferruled - had ferruled Future Perfect - will have ferruled - will have ferruled - will have ferruled - will have ferruled - will have ferruled - will have ferruled Past conditional - would have ferruled - would have ferruled - would have ferruled - would have ferruled - would have ferruled - would have ferruled Imperative - - - ferrule - - - - - - - -