Present participle; Past participle - keening - keened Present - keen - keen - keens - keen - keen - keen Past - keened - keened - keened - keened - keened - keened Future - will keen - will keen - will keen - will keen - will keen - will keen Present conditional - would keen - would keen - would keen - would keen - would keen - would keen Present Perfect - have keened - have keened - has keened - have keened - have keened - have keened Past Perfect - had keened - had keened - had keened - had keened - had keened - had keened Future Perfect - will have keened - will have keened - will have keened - will have keened - will have keened - will have keened Past conditional - would have keened - would have keened - would have keened - would have keened - would have keened - would have keened Imperative - - - keen - - - - - - - -