Present participle; Past participle - flatting - flatted Present - flat - flat - flats - flat - flat - flat Past - flatted - flatted - flatted - flatted - flatted - flatted Future - will flat - will flat - will flat - will flat - will flat - will flat Present conditional - would flat - would flat - would flat - would flat - would flat - would flat Present Perfect - have flatted - have flatted - has flatted - have flatted - have flatted - have flatted Past Perfect - had flatted - had flatted - had flatted - had flatted - had flatted - had flatted Future Perfect - will have flatted - will have flatted - will have flatted - will have flatted - will have flatted - will have flatted Past conditional - would have flatted - would have flatted - would have flatted - would have flatted - would have flatted - would have flatted Imperative - - - flat - - - - - - - -