How is the italian sonnet different from the shakespearean sonnet?

A- It contains a sestet.

Explanation:

The Petrarchan sonnet is a sonnet with 14 lines and two subgroups- an octave and a sestet. The octave follows the rhyming scheme of ABBA ABBA and the sestet follows either CDE CDE or CDC CDC.

On the other hand, a Shakespearean sonnet have 14 lines with 4 subgroups, three quatrains and a couplet. Each line is phrased in an iambic pentameter and follows the rhyming scheme of ABAB CDCD EFEF GG. There is no sestet in a Shakespearean sonnet.

"the tune the he might never know again." this part build anticipation. dexter got extremely happy by the piano tune. he could see what he was living at that moment in his life throught this feeling. the reader might want to learn more about his happy life. in fact, he called it a state of   'ecstasy'. the fact that he had got in a mood of intense appreciation and that everything about him was extremely bright and glamorous might lead the reader to feel that this state of happiness may not last long. the two parts from the excerpt that exemplify the anticipation are: " the sound of the "; " it was a know again."