[header] How to write a sonnet like shakespeare [title] Include 14 lines of equal length. [step] The sonnet is known for its length : 14 lines exactly. There are many varieties of the sonnet form, but shakespearean sonnets are always 14 lines. 
The quatrain is a poetic term for 4 lines of poetry that share a common sensibility, and usually share a rhyme scheme. The couplet is a poetic term for 2 lines of rhyming verse.