Present participle; Past participle - trailing - trailed Present - trail - trail - trails - trail - trail - trail Past - trailed - trailed - trailed - trailed - trailed - trailed Future - will trail - will trail - will trail - will trail - will trail - will trail Present conditional - would trail - would trail - would trail - would trail - would trail - would trail Present Perfect - have trailed - have trailed - has trailed - have trailed - have trailed - have trailed Past Perfect - had trailed - had trailed - had trailed - had trailed - had trailed - had trailed Future Perfect - will have trailed - will have trailed - will have trailed - will have trailed - will have trailed - will have trailed Past conditional - would have trailed - would have trailed - would have trailed - would have trailed - would have trailed - would have trailed Imperative - - - trail - - - - - - - -