Present participle; Past participle - clattering - clattered Present - clatter - clatter - clatters - clatter - clatter - clatter Past - clattered - clattered - clattered - clattered - clattered - clattered Future - will clatter - will clatter - will clatter - will clatter - will clatter - will clatter Present conditional - would clatter - would clatter - would clatter - would clatter - would clatter - would clatter Present Perfect - have clattered - have clattered - has clattered - have clattered - have clattered - have clattered Past Perfect - had clattered - had clattered - had clattered - had clattered - had clattered - had clattered Future Perfect - will have clattered - will have clattered - will have clattered - will have clattered - will have clattered - will have clattered Past conditional - would have clattered - would have clattered - would have clattered - would have clattered - would have clattered - would have clattered Imperative - - - clatter - - - - - - - -