Present participle; Past participle - burrowing - burrowed Present - burrow - burrow - burrows - burrow - burrow - burrow Past - burrowed - burrowed - burrowed - burrowed - burrowed - burrowed Future - will burrow - will burrow - will burrow - will burrow - will burrow - will burrow Present conditional - would burrow - would burrow - would burrow - would burrow - would burrow - would burrow Present Perfect - have burrowed - have burrowed - has burrowed - have burrowed - have burrowed - have burrowed Past Perfect - had burrowed - had burrowed - had burrowed - had burrowed - had burrowed - had burrowed Future Perfect - will have burrowed - will have burrowed - will have burrowed - will have burrowed - will have burrowed - will have burrowed Past conditional - would have burrowed - would have burrowed - would have burrowed - would have burrowed - would have burrowed - would have burrowed Imperative - - - burrow - - - - - - - -