Present participle; Past participle - stalling - stalled Present - stall - stall - stalls - stall - stall - stall Past - stalled - stalled - stalled - stalled - stalled - stalled Future - will stall - will stall - will stall - will stall - will stall - will stall Present conditional - would stall - would stall - would stall - would stall - would stall - would stall Present Perfect - have stalled - have stalled - has stalled - have stalled - have stalled - have stalled Past Perfect - had stalled - had stalled - had stalled - had stalled - had stalled - had stalled Future Perfect - will have stalled - will have stalled - will have stalled - will have stalled - will have stalled - will have stalled Past conditional - would have stalled - would have stalled - would have stalled - would have stalled - would have stalled - would have stalled Imperative - - - stall - - - - - - - -