You add a comma to prepositional phrase when you want to tell more about the adjectives and adverbs.
Answer:
Iambic Pentameter Examples
Explanation:
Shakespeare's sonnet 18 starts 'Shall I compare thee to a summer's day? '. This line of poetry has five feet,so it's written in pentameter. And the stressing pattern is all iambs (an unstressed syllable followed by a stressed syllable):