Present participle; Past participle - penning - penned Present - pen - pen - pens - pen - pen - pen Past - penned - penned - penned - penned - penned - penned Future - will pen - will pen - will pen - will pen - will pen - will pen Present conditional - would pen - would pen - would pen - would pen - would pen - would pen Present Perfect - have penned - have penned - has penned - have penned - have penned - have penned Past Perfect - had penned - had penned - had penned - had penned - had penned - had penned Future Perfect - will have penned - will have penned - will have penned - will have penned - will have penned - will have penned Past conditional - would have penned - would have penned - would have penned - would have penned - would have penned - would have penned Imperative - - - pen - - - - - - - -