Answer:
I want to keep the peace, so put your sword away or use it to help me break up this brawl.
Step-by-step explanation:
This is the best paraphrase of Benvolio's words. In these lines, Benvolio states that he is simply interested in keeping the peace. Therefore, he asks the other person (which in this case is Tybalt) to put his sword away. If he does not want to, then he asks Tybalt to at least use it to help him stop the fight. However, Tybalt does not like this suggestion.