Present participle; Past participle - chugging - chugged Present - chug - chug - chugs - chug - chug - chug Past - chugged - chugged - chugged - chugged - chugged - chugged Future - will chug - will chug - will chug - will chug - will chug - will chug Present conditional - would chug - would chug - would chug - would chug - would chug - would chug Present Perfect - have chugged - have chugged - has chugged - have chugged - have chugged - have chugged Past Perfect - had chugged - had chugged - had chugged - had chugged - had chugged - had chugged Future Perfect - will have chugged - will have chugged - will have chugged - will have chugged - will have chugged - will have chugged Past conditional - would have chugged - would have chugged - would have chugged - would have chugged - would have chugged - would have chugged Imperative - - - chug - - - - - - - -