Present participle; Past participle - duping - duped Present - dupe - dupe - dupes - dupe - dupe - dupe Past - duped - duped - duped - duped - duped - duped Future - will dupe - will dupe - will dupe - will dupe - will dupe - will dupe Present conditional - would dupe - would dupe - would dupe - would dupe - would dupe - would dupe Present Perfect - have duped - have duped - has duped - have duped - have duped - have duped Past Perfect - had duped - had duped - had duped - had duped - had duped - had duped Future Perfect - will have duped - will have duped - will have duped - will have duped - will have duped - will have duped Past conditional - would have duped - would have duped - would have duped - would have duped - would have duped - would have duped Imperative - - - dupe - - - - - - - -