Present participle; Past participle - gumming - gummed Present - gum - gum - gums - gum - gum - gum Past - gummed - gummed - gummed - gummed - gummed - gummed Future - will gum - will gum - will gum - will gum - will gum - will gum Present conditional - would gum - would gum - would gum - would gum - would gum - would gum Present Perfect - have gummed - have gummed - has gummed - have gummed - have gummed - have gummed Past Perfect - had gummed - had gummed - had gummed - had gummed - had gummed - had gummed Future Perfect - will have gummed - will have gummed - will have gummed - will have gummed - will have gummed - will have gummed Past conditional - would have gummed - would have gummed - would have gummed - would have gummed - would have gummed - would have gummed Imperative - - - gum - - - - - - - -