Present participle; Past participle - doctoring - doctored Present - doctor - doctor - doctors - doctor - doctor - doctor Past - doctored - doctored - doctored - doctored - doctored - doctored Future - will doctor - will doctor - will doctor - will doctor - will doctor - will doctor Present conditional - would doctor - would doctor - would doctor - would doctor - would doctor - would doctor Present Perfect - have doctored - have doctored - has doctored - have doctored - have doctored - have doctored Past Perfect - had doctored - had doctored - had doctored - had doctored - had doctored - had doctored Future Perfect - will have doctored - will have doctored - will have doctored - will have doctored - will have doctored - will have doctored Past conditional - would have doctored - would have doctored - would have doctored - would have doctored - would have doctored - would have doctored Imperative - - - doctor - - - - - - - -