Present participle; Past participle - mattering - mattered Present - matter - matter - matters - matter - matter - matter Past - mattered - mattered - mattered - mattered - mattered - mattered Future - will matter - will matter - will matter - will matter - will matter - will matter Present conditional - would matter - would matter - would matter - would matter - would matter - would matter Present Perfect - have mattered - have mattered - has mattered - have mattered - have mattered - have mattered Past Perfect - had mattered - had mattered - had mattered - had mattered - had mattered - had mattered Future Perfect - will have mattered - will have mattered - will have mattered - will have mattered - will have mattered - will have mattered Past conditional - would have mattered - would have mattered - would have mattered - would have mattered - would have mattered - would have mattered Imperative - - - matter - - - - - - - -