Sonnet 30 up of fourteen lines in three quatrains and a couplet, rhyming "abab cdcd efef gg". While using the rhyming and metrical structure of the 'English' or 'Surreyan' sonnet, Shakespeare often also reflected the rhetorical form of the Italian form also known as the Petrarchan sonnet. It divides the sonnet into two parts: the "octet" (the first eight lines) usually states and develops the subject, while the "sestet" (the last six lines) winds up to a climax. Thus a change in emphasis, known as the "volta", occurs between the end of the eighth and the beginning of the ninth lines —
Sonnet 60 claims that the first two lines are "answered directly by two regular lines". Despite this disagreement, both critics acknowledge that the non-iambic feet simulate the undulating and crashing waves that Shakespeare portrays in the first line of the sonnet. While Vendler emphasizes the meter of the first quatrain, Atkins and Arbour continue this analysis by examining the second quatrain. After the first quatrain, the next trochee occurs in the middle of line 5, the only medial trochee of the sonnet, followed by trochees at the beginning of the sixth and seventh lines. The sixth and seventh lines mirror the first