AB denotes which form?

AB denotes which form?

• A. Simple binary form
• B. Rounded binary form
• C. Ternary form
• D. Rondo form

Answer: (A)

AB denotes a two-part form where section A moves into section B in sequence, with both parts typically serving as contrasting ideas. This layout is best described as simple binary form, since there is no requirement that the A material return in the B section. If the form were rounded binary, you’d expect some return of A’s material toward the end of B, giving an A feel at the close of the piece. Ternary would be an A–B–A pattern, returning to the initial material after B, while a rondo involves recurring A sections interspersed with episodes (like A–B–A–C–A). In short, AB is simply two distinct parts in succession, making it simple binary form.

AB denotes a two-part form where section A moves into section B in sequence, with both parts typically serving as contrasting ideas. This layout is best described as simple binary form, since there is no requirement that the A material return in the B section. If the form were rounded binary, you’d expect some return of A’s material toward the end of B, giving an A feel at the close of the piece. Ternary would be an A–B–A pattern, returning to the initial material after B, while a rondo involves recurring A sections interspersed with episodes (like A–B–A–C–A). In short, AB is simply two distinct parts in succession, making it simple binary form.