Present participle; Past participle - sparring - sparred Present - spar - spar - spars - spar - spar - spar Past - sparred - sparred - sparred - sparred - sparred - sparred Future - will spar - will spar - will spar - will spar - will spar - will spar Present conditional - would spar - would spar - would spar - would spar - would spar - would spar Present Perfect - have sparred - have sparred - has sparred - have sparred - have sparred - have sparred Past Perfect - had sparred - had sparred - had sparred - had sparred - had sparred - had sparred Future Perfect - will have sparred - will have sparred - will have sparred - will have sparred - will have sparred - will have sparred Past conditional - would have sparred - would have sparred - would have sparred - would have sparred - would have sparred - would have sparred Imperative - - - spar - - - - - - - -