Present participle; Past participle - coauthoring - coauthored Present - coauthor - coauthor - coauthors - coauthor - coauthor - coauthor Past - coauthored - coauthored - coauthored - coauthored - coauthored - coauthored Future - will coauthor - will coauthor - will coauthor - will coauthor - will coauthor - will coauthor Present conditional - would coauthor - would coauthor - would coauthor - would coauthor - would coauthor - would coauthor Present Perfect - have coauthored - have coauthored - has coauthored - have coauthored - have coauthored - have coauthored Past Perfect - had coauthored - had coauthored - had coauthored - had coauthored - had coauthored - had coauthored Future Perfect - will have coauthored - will have coauthored - will have coauthored - will have coauthored - will have coauthored - will have coauthored Past conditional - would have coauthored - would have coauthored - would have coauthored - would have coauthored - would have coauthored - would have coauthored Imperative - - - coauthor - - - - - - - -