John Keats's "On the Sonnet" consists of 14 lines and is structured as an Italian sonnet, which includes an octave (8 lines) followed by a sestet (6 lines). It does not consist of quatrains, which are four-line stanzas typically found in poems like William Shakespeare's sonnets.
In a Shakespearean sonnet, there are 3 quatrains
3
3
A Shakespearean sonnet consists of 3 quatrains (4-line stanzas) followed by a rhymed couplet (2-line stanza).
Quatrains.
With three quatrains and a couplet
Three quatrains, one couplet. (3x4)+2=14
A Shakespearean sonnet has three quatrains (four-line stanzas) followed by a rhyming couplet (two-line stanza) at the end. This structure is also known as the English sonnet.
three quatrains and a couplet
Shakespearean sonnets have three quatrains and a couplet.
There are two main types of sonnets: the Italian/Petrarchan sonnet and the English/Shakespearean sonnet. The Italian sonnet consists of an octave followed by a sestet, while the English sonnet consists of three quatrains and a final couplet.
Quatrains