Present participle; Past participle - timbering - timbered Present - timber - timber - timbers - timber - timber - timber Past - timbered - timbered - timbered - timbered - timbered - timbered Future - will timber - will timber - will timber - will timber - will timber - will timber Present conditional - would timber - would timber - would timber - would timber - would timber - would timber Present Perfect - have timbered - have timbered - has timbered - have timbered - have timbered - have timbered Past Perfect - had timbered - had timbered - had timbered - had timbered - had timbered - had timbered Future Perfect - will have timbered - will have timbered - will have timbered - will have timbered - will have timbered - will have timbered Past conditional - would have timbered - would have timbered - would have timbered - would have timbered - would have timbered - would have timbered Imperative - - - timber - - - - - - - -