Sonnet-the italian petrarchan sonnet consists of an eight-line stanza (octave) and a six-line stanza (sestet). the first stanza presents a theme, and the second stanza develops it. the rhyme scheme is as follows: (1) first stanza (octave): abba, abba; (2) second stanza (sestet): cde, cde. the shakespearean sonnet (also called the english sonnet) has three four-line stanzas (quatrains) and a two-line unit called a couplet. a couplet is always indented; both lines rhyme at the end. the meter of shakespeares sonnets is iambic pentameter (except in sonnet 145). the rhyming lines in each stanza are the first and third and the second and fourth. in the couplet ending the poem, both lines rhyme. all of shakespeares sonnets follow the same rhyming pattern.