Development: This section is where the composer develops the themes introduced in the exposition. This can be done through a variety of techniques, such as repetition, variation, and contrast.
Recapitulation: This section is a restatement of the two main themes. The first theme is typically in the tonic key, while the second theme is typically in the dominant key.
Coda: This section is a brief conclusion to the sonata. It is optional, but it is often used to provide a sense of closure.