Present participle; Past participle - stymieing - stymied Present - stymie - stymie - stymies - stymie - stymie - stymie Past - stymied - stymied - stymied - stymied - stymied - stymied Future - will stymie - will stymie - will stymie - will stymie - will stymie - will stymie Present conditional - would stymie - would stymie - would stymie - would stymie - would stymie - would stymie Present Perfect - have stymied - have stymied - has stymied - have stymied - have stymied - have stymied Past Perfect - had stymied - had stymied - had stymied - had stymied - had stymied - had stymied Future Perfect - will have stymied - will have stymied - will have stymied - will have stymied - will have stymied - will have stymied Past conditional - would have stymied - would have stymied - would have stymied - would have stymied - would have stymied - would have stymied Imperative - - - stymie - - - - - - - -