Present participle; Past participle - dumfounding - dumfounded Present - dumfound - dumfound - dumfounds - dumfound - dumfound - dumfound Past - dumfounded - dumfounded - dumfounded - dumfounded - dumfounded - dumfounded Future - will dumfound - will dumfound - will dumfound - will dumfound - will dumfound - will dumfound Present conditional - would dumfound - would dumfound - would dumfound - would dumfound - would dumfound - would dumfound Present Perfect - have dumfounded - have dumfounded - has dumfounded - have dumfounded - have dumfounded - have dumfounded Past Perfect - had dumfounded - had dumfounded - had dumfounded - had dumfounded - had dumfounded - had dumfounded Future Perfect - will have dumfounded - will have dumfounded - will have dumfounded - will have dumfounded - will have dumfounded - will have dumfounded Past conditional - would have dumfounded - would have dumfounded - would have dumfounded - would have dumfounded - would have dumfounded - would have dumfounded Imperative - - - dumfound - - - - - - - -