Final answer:
No, Shakespeare did not add sonnets to his plays. Sonnets are a form of poetry separate from his plays.
Step-by-step explanation:
No, Shakespeare did not add sonnets to his plays. While Shakespeare is known for his sonnets, they are separate from his plays.
Sonnets are a form of poetry consisting of fourteen lines with a specific rhyme scheme, while his plays are dramatic works meant to be performed on stage.