Fourth Movement (Prestissimo) Form: Sonata Form. The first part of Bar 1 is introductory. SONATA FORM – The long episode in the “development” as caused this movement to be sometimes described as being in Rondo form, but if it were in Rondo form, the Exposition would have ended in the tonic key with a return of the first subject. F minor. EXPOSITION: Bars 1-10: First subject in F minor (Tonic).