Present participle; Past participle - stagnating - stagnated Present - stagnate - stagnate - stagnates - stagnate - stagnate - stagnate Past - stagnated - stagnated - stagnated - stagnated - stagnated - stagnated Future - will stagnate - will stagnate - will stagnate - will stagnate - will stagnate - will stagnate Present conditional - would stagnate - would stagnate - would stagnate - would stagnate - would stagnate - would stagnate Present Perfect - have stagnated - have stagnated - has stagnated - have stagnated - have stagnated - have stagnated Past Perfect - had stagnated - had stagnated - had stagnated - had stagnated - had stagnated - had stagnated Future Perfect - will have stagnated - will have stagnated - will have stagnated - will have stagnated - will have stagnated - will have stagnated Past conditional - would have stagnated - would have stagnated - would have stagnated - would have stagnated - would have stagnated - would have stagnated Imperative - - - stagnate - - - - - - - -