In terms of structure<span>, a Shakespearean sonnet has 14 lines and is </span>written<span> in iambic pentameter. This </span>means<span> that has 3 quatrains (4 </span>line sections<span>) and one </span>heroic couplet. The rhyme scheme, therefore, is abab (quatrain 1), cdcd (quatrain 2), efef (quatrain 3), and gg (heroic<span> couplet). according to enotes
