what is this sonnet?
Sonnet 18 is a typical English or Shakespearean sonnet, having 14 lines of iambic pentameter: three quatrains followed by a couplet.  The poem reflects the rhetorical tradition of an Italian or Petrarchan Sonnet.
Sonnet 18
Sonnet 18 is a typical English or Shakespearean sonnet, having 14 lines of iambic pentameter: three quatrains followed by a couplet. It also has the characteristic rhyme scheme: ABAB CDCD EFEF GG. The poem reflects the rhetorical tradition of an Italian or Petrarchan Sonnet. 
shall i compare thee to a summer's day thou art more lovely and more temperate meaning UNANSWERABLE
wiki:15726473
Sonnet 18 [SEP] Structure
Sonnet 18 is a typical English or Shakespearean sonnet, having 14 lines of iambic pentameter: three quatrains followed by a couplet. It also has the characteristic rhyme scheme: ABAB CDCD EFEF GG. The poem reflects the rhetorical tradition of an Italian or Petrarchan Sonnet. Petrarchan sonnets typically discussed the love and beauty of a beloved, often an unattainable love, but not always. It also contains a "volta", or shift in the poem's subject matter, beginning with the third quatrain. The couplet's first line exemplifies a regular iambic pentameter rhythm: