Present participle; Past participle - stumping - stumped Present - stump - stump - stumps - stump - stump - stump Past - stumped - stumped - stumped - stumped - stumped - stumped Future - will stump - will stump - will stump - will stump - will stump - will stump Present conditional - would stump - would stump - would stump - would stump - would stump - would stump Present Perfect - have stumped - have stumped - has stumped - have stumped - have stumped - have stumped Past Perfect - had stumped - had stumped - had stumped - had stumped - had stumped - had stumped Future Perfect - will have stumped - will have stumped - will have stumped - will have stumped - will have stumped - will have stumped Past conditional - would have stumped - would have stumped - would have stumped - would have stumped - would have stumped - would have stumped Imperative - - - stump - - - - - - - -