Present participle; Past participle - authoring - authored Present - author - author - authors - author - author - author Past - authored - authored - authored - authored - authored - authored Future - will author - will author - will author - will author - will author - will author Present conditional - would author - would author - would author - would author - would author - would author Present Perfect - have authored - have authored - has authored - have authored - have authored - have authored Past Perfect - had authored - had authored - had authored - had authored - had authored - had authored Future Perfect - will have authored - will have authored - will have authored - will have authored - will have authored - will have authored Past conditional - would have authored - would have authored - would have authored - would have authored - would have authored - would have authored Imperative - - - author - - - - - - - -