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.
It lies upon the River Hull at its junction with the Humber estuary, 25 miles (40 km) inland from the North Sea, with a population of 257,710 (mid-2014 est.). The town of Hull was founded late in the 12th century.The monks of Meaux Abbey needed a port where the wool from their estates could be exported.ull is also a rugby league hub, having two clubs who play in the Super League competition. Hull F.C. , alongside the city's football club Hull City, play at the KC Stadium while Hull Kingston Rovers play at Craven Park in East Hull.