No. 27, first 20 measures (introductory phrase).
No. 3, first 29 measures, to double-bar (introductory phrase).
No. 36, first 27 measures (the similarity between phrase one and phrase three proves the double-period form; the extra phrases are extension by "addition," as in the group form).
No. 6, measures 8-17.
Mozart, pianoforte sonata. No. 13 (Peters edition), first 16 measures.
Sonata No. 2, first 16 measures (last four measures are extension).
Sonata No. 3, last movement, first 16 measures.
Sonata No. 10, second movement, first 16 measures.
Beethoven, pianoforte sonatas; op. 49, No. 2, first 12 measures.
Op. 10, No. 3, first 16 measures.