Act I and Act III parallel each other in the ways they begin and end. Both acts open with violence in the streets of Verona caused by the "ancient grudge" between the Montagues and the Capulets. Act I, Scene 1 depicts an angry and belligerent Tybalt who seems bent on instigating the Montagues to engage in sword play. In Act I, Benvolio rightly backs down. In Act III, Scene 1, however, Mercutio, who does not appear in Act I, Scene 1, will not abide Tybalt's insults and they fight, with catastrophic consequences. The fight seems a logical extension and conclusion of the violence which opens the play.
Likewise, the closing scenes tend to echo each other with the portrayal of a tender moment between Romeo and Juliet and ending with tension. In Act I, Scene 5, Romeo and Juliet meet and fall instantly in love. At the close of the scene, the two lovers part ways and discover each other's identities, creating suspense and uncertainty. In Act III, Scene 5 Romeo and Juliet have consummated the love they discovered in Act I. They also part ways with uncertainty, Romeo banished to Mantua, and Juliet left at the hands of her father who will soon demand she marry Paris.