How does Shakespeare make use of metre in 'Romeo and Juliet'?

The majority of Shakespeare's 'Romeo and Juliet' is written in blank verse, or unrhymed iambic pentameter. This meter closely replicates the natural rhythm of spoken English. However, at key moments - such as the conclusions of scenes, or the prologue - Shakespeare uses rhyme to add dramatic effect. Take, for example, the moment when Romeo first sees Juliet at the Capulet's ball: 'Oh, she doth teach the torches to burn bright!' Shakespeare also dispenses of iambic pentameter to underline the abrupt or crass nature of certain sections of dialogue - for example, during bawdy jokes, or when servants are conversing amongst themselves. 'Away with the joint-stools, remove the court-cupboard, look to the plate. Good thou, save me a piece of marchpane, and, as thou loves me, let the porter let in Susan Grindstone and Nell.—Antony and Potpan!'