Musical form and structure refers to how music is organized into sections. All music has an overall plan or structure. Common musical forms include strophic form with repeating sections (AAA), binary form with two contrasting sections (AB), ternary form with three sections in a pattern of contrast and return (ABA), and rondo form with a recurring theme interrupted by different sections (ABACADA). Understanding musical form helps analyze how musical materials, ideas, and sections are constructed.