Present participle; Past participle - chumming - chummed Present - chum - chum - chums - chum - chum - chum Past - chummed - chummed - chummed - chummed - chummed - chummed Future - will chum - will chum - will chum - will chum - will chum - will chum Present conditional - would chum - would chum - would chum - would chum - would chum - would chum Present Perfect - have chummed - have chummed - has chummed - have chummed - have chummed - have chummed Past Perfect - had chummed - had chummed - had chummed - had chummed - had chummed - had chummed Future Perfect - will have chummed - will have chummed - will have chummed - will have chummed - will have chummed - will have chummed Past conditional - would have chummed - would have chummed - would have chummed - would have chummed - would have chummed - would have chummed Imperative - - - chum - - - - - - - -