Present participle; Past participle - duel(l)ing - duel(l)ed Present - duel - duel - duels - duel - duel - duel Past - duel(l)ed - duel(l)ed - duel(l)ed - duel(l)ed - duel(l)ed - duel(l)ed Future - will duel - will duel - will duel - will duel - will duel - will duel Present conditional - would duel - would duel - would duel - would duel - would duel - would duel Present Perfect - have duel(l)ed - have duel(l)ed - has duel(l)ed - have duel(l)ed - have duel(l)ed - have duel(l)ed Past Perfect - had duel(l)ed - had duel(l)ed - had duel(l)ed - had duel(l)ed - had duel(l)ed - had duel(l)ed Future Perfect - will have duel(l)ed - will have duel(l)ed - will have duel(l)ed - will have duel(l)ed - will have duel(l)ed - will have duel(l)ed Past conditional - would have duel(l)ed - would have duel(l)ed - would have duel(l)ed - would have duel(l)ed - would have duel(l)ed - would have duel(l)ed Imperative - - - duel - - - - - - - -