A [a (measures 1-8)+a1 (measures 9-16)]

B [b (measures 17-24) + a2 (measures 25-32)]

The main key is C major. It is in binary form.

The theme is characterized by a rambling conversational atmosphere, with repetitive motifs unified by long slurs. Section a1 begins forte and contrasts with section a by modulating to G major. The middle section is short, consisting mainly of ascending and descending arpeggiated lines, and lacks significant musical nuance. The recapitulation of the theme from measure 25 begins with a pedal point on the tonic.