Present participle; Past participle - swelling - swelled Present - swell - swell - swells - swell - swell - swell Past - swelled - swelled - swelled - swelled - swelled - swelled Future - will swell - will swell - will swell - will swell - will swell - will swell Present conditional - would swell - would swell - would swell - would swell - would swell - would swell Present Perfect - have swelled - have swelled - has swelled - have swelled - have swelled - have swelled Past Perfect - had swelled - had swelled - had swelled - had swelled - had swelled - had swelled Future Perfect - will have swelled - will have swelled - will have swelled - will have swelled - will have swelled - will have swelled Past conditional - would have swelled - would have swelled - would have swelled - would have swelled - would have swelled - would have swelled Imperative - - - swell - - - - - - - -