That's because not every single line is perfect iambic pentameter. Line after line of perfect meter ends up sounding more like a nursery rhyme than poetry, so poets (and playwrights) will play with the meter to emphasize certain words. Let's skip back to one of the non-perfect lines in the Prologue:
Hull is a town in Plymouth County, Massachusetts, United States, located on a peninsula at the southern edge of Boston Harbor. Its population was 10,293 at the 2010 census. Hull is the smallest town by land area in Plymouth County and the fourth smallest in the state.
Peas in their hull. Peas in their hull. The definition of a hull is the outer layer of something or the outer shell of a seed or fruit. 1  An example of a hull is the frame of a boat. 2  An example of a hull is the shell of a grain of wheat.eas in their hull. The definition of a hull is the outer layer of something or the outer shell of a seed or fruit. 1  An example of a hull is the frame of a boat.