Present participle; Past participle - humming - hummed Present - hum - hum - hums - hum - hum - hum Past - hummed - hummed - hummed - hummed - hummed - hummed Future - will hum - will hum - will hum - will hum - will hum - will hum Present conditional - would hum - would hum - would hum - would hum - would hum - would hum Present Perfect - have hummed - have hummed - has hummed - have hummed - have hummed - have hummed Past Perfect - had hummed - had hummed - had hummed - had hummed - had hummed - had hummed Future Perfect - will have hummed - will have hummed - will have hummed - will have hummed - will have hummed - will have hummed Past conditional - would have hummed - would have hummed - would have hummed - would have hummed - would have hummed - would have hummed Imperative - - - hum - - - - - - - -