Rhyme Scheme. This poem is divided into stanzas of four lines, with two couplets (2 lines in which the last word rhymes) in each stanza.. . . couplet. couplet. . . . . a. a. b. b. Rhyme Scheme 2. Rhyme scheme is labeled using letters. Each letter stands for a new rhyme. The rhyme scheme of this stanza is aabb..