Present participle; Past participle - kittening - kittened Present - kitten - kitten - kittens - kitten - kitten - kitten Past - kittened - kittened - kittened - kittened - kittened - kittened Future - will kitten - will kitten - will kitten - will kitten - will kitten - will kitten Present conditional - would kitten - would kitten - would kitten - would kitten - would kitten - would kitten Present Perfect - have kittened - have kittened - has kittened - have kittened - have kittened - have kittened Past Perfect - had kittened - had kittened - had kittened - had kittened - had kittened - had kittened Future Perfect - will have kittened - will have kittened - will have kittened - will have kittened - will have kittened - will have kittened Past conditional - would have kittened - would have kittened - would have kittened - would have kittened - would have kittened - would have kittened Imperative - - - kitten - - - - - - - -