Present participle; Past participle - taxing - taxed Present - tax - tax - taxes - tax - tax - tax Past - taxed - taxed - taxed - taxed - taxed - taxed Future - will tax - will tax - will tax - will tax - will tax - will tax Present conditional - would tax - would tax - would tax - would tax - would tax - would tax Present Perfect - have taxed - have taxed - has taxed - have taxed - have taxed - have taxed Past Perfect - had taxed - had taxed - had taxed - had taxed - had taxed - had taxed Future Perfect - will have taxed - will have taxed - will have taxed - will have taxed - will have taxed - will have taxed Past conditional - would have taxed - would have taxed - would have taxed - would have taxed - would have taxed - would have taxed Imperative - - - tax - - - - - - - -