answer:a line of perfect iambic pentameter is a line consisting of 5 “iambs”. Meaning: an unstressed syllable followed by a stressed syllable. (bum-BUM). String 5 of them together and that’s pentameter (da-DA, da-DA, da-DA, da-DA, da-DA) Think of it like a heartbeat. “Shall I comPARE thee TO a SUMmer’s DAY?” (sonnet 18) or “Two HOUSEholds BOTH aLIKE in DIGniTY..” (Romeo & Juliet, act 1 sc.1)