Present participle; Past participle - piing - pied Present - pi - pi - pies - pi - pi - pi Past - pied - pied - pied - pied - pied - pied Future - will pi - will pi - will pi - will pi - will pi - will pi Present conditional - would pi - would pi - would pi - would pi - would pi - would pi Present Perfect - have pied - have pied - has pied - have pied - have pied - have pied Past Perfect - had pied - had pied - had pied - had pied - had pied - had pied Future Perfect - will have pied - will have pied - will have pied - will have pied - will have pied - will have pied Past conditional - would have pied - would have pied - would have pied - would have pied - would have pied - would have pied Imperative - - - pi - - - - - - - -