The sonnet is a fourteen-line poem written in iambic pentameter. One of the most famous sonnet writers is William Shakespeare, who introduced his own type of sonnet that consists of three quatrains (four-line stanzas) and a couplet, and has the following rhyme scheme: ABAB CDCD EFEF GG. These sonnets are known as Shakespearean sonnets, English sonnets, or Elizabethan sonnets.
The underlined section consists of four lines, which makes it a quatrain.
A couplet consists of two lines, an iamb is a metrical foot used in poetry, while the pentameter is a line that consists of five metrical feet.
