Samantha B. answered 04/12/21
Tutor for GRE, ACT, AP, SAT Math, and others
When poets and playwrights vary their established meter, they do so for a number of reasons. Most verse isn't in perfect iambic pentameter or trochaic tetrameter (or any other meter) just because that would be difficult to write and unnatural to speak/read. When the verse varies, however, it is usually for a purpose. It shows us where to place emphasis when reading and directs us to what the author considers most important. It can indicate strong emotion, which is especially useful for verse in plays. Try reading the poetry aloud to yourself, first forcing it to conform to the perfect meter. Then read it again, this time leaning into all the metrical variations. Listen to yourself and feel the difference.