Sonnet
It was, however, Sir Philip Sidney's sequence "Astrophel and Stella" (1591) that started the English vogue for sonnet sequences. The next two decades saw sonnet sequences by William Shakespeare, Edmund Spenser, Michael Drayton, Samuel Daniel, Fulke Greville, William Drummond of Hawthornden, and many others. These sonnets were all essentially inspired by the Petrarchan tradition, and generally treat of the poet's love for some woman, with the exception of Shakespeare's sequence of 154 sonnets. The form is often named after Shakespeare, not because he was the first to write in this form but because he became its most famous practitioner. The form consists of fourteen lines structured as three quatrains and a couplet. The third quatrain generally introduces an unexpected sharp thematic or imagistic "turn", the volta. In Shakespeare's sonnets, however, the volta usually comes in the couplet, and usually summarizes the theme of the poem or introduces a fresh new look at the theme. With only a rare exception (for example, Shakespeare's Sonnet 145 in iambic tetrameter), the meter is iambic pentameter.
Petrarch's and Shakespeare's sonnets
William Shakespeare utilized the sonnet in love poetry of his own, employing the sonnet structure conventionalized by English poets Wyatt and Surrey. This structure, known as the English or Shakespearean sonnet, consists of three quatrains and a concluding couplet. The rhyme scheme is a simple ABAB CDCD EFEF GG format. The effect is “like going for a short drive with a very fast driver: the first lines, even the first quatrain, are in low gear; then the second and third accelerate sharply, and ideas and metaphors flash past; and then there is a sudden throttling-back, and one glides to a stop in the couplet”. Like Petrarch, Shakespeare used structure to explore the multiple facets of a theme in a short piece.