Poetry have challenged the traditional definitions of the sonnet form, rendering entire sequences of "sonnets" that often lack rhyme, a clear logical progression, or even a consistent count of fourteen lines. "Shi" () Is the main type of Classical Chinese poetry. Within this form of poetry the most important variations are "folk song" styled verse ("yuefu"), "old style" verse ("gushi"), "modern style" verse ("jintishi"). In all cases, rhyming is obligatory. The Yuefu is a folk ballad or a poem written in the folk ballad style, and the number of lines and the length of the lines could be irregular. For the
Sonnet 19 himself will not survive time’s effects, because redemption brought by the granting of everlasting youth is not actual, but rather ideal or poetic. Sonnet 19 is a typical English or Shakespearean sonnet. The English sonnet consists of three quatrains followed by a couplet. It follows the form's typical rhyme scheme: "abab cdcd efef gg". Like all but one of Shakespeare's sonnets, Sonnet 19 is written in a type of metre called iambic pentameter based on five pairs of metrically weak/strong syllabic positions. The eighth line exemplifies a regular iambic pentameter: Both the first and third lines exhibit reversals which thrust