Present participle; Past participle - grounding - grounded Present - ground - ground - grounds - ground - ground - ground Past - grounded - grounded - grounded - grounded - grounded - grounded Future - will ground - will ground - will ground - will ground - will ground - will ground Present conditional - would ground - would ground - would ground - would ground - would ground - would ground Present Perfect - have grounded - have grounded - has grounded - have grounded - have grounded - have grounded Past Perfect - had grounded - had grounded - had grounded - had grounded - had grounded - had grounded Future Perfect - will have grounded - will have grounded - will have grounded - will have grounded - will have grounded - will have grounded Past conditional - would have grounded - would have grounded - would have grounded - would have grounded - would have grounded - would have grounded Imperative - - - ground - - - - - - - -