Present participle; Past participle - buttoning - buttoned Present - button - button - buttons - button - button - button Past - buttoned - buttoned - buttoned - buttoned - buttoned - buttoned Future - will button - will button - will button - will button - will button - will button Present conditional - would button - would button - would button - would button - would button - would button Present Perfect - have buttoned - have buttoned - has buttoned - have buttoned - have buttoned - have buttoned Past Perfect - had buttoned - had buttoned - had buttoned - had buttoned - had buttoned - had buttoned Future Perfect - will have buttoned - will have buttoned - will have buttoned - will have buttoned - will have buttoned - will have buttoned Past conditional - would have buttoned - would have buttoned - would have buttoned - would have buttoned - would have buttoned - would have buttoned Imperative - - - button - - - - - - - -