- it contains a basic idea followed by a contrasting idea; it does not end with a cadence
- antecedent + continuation
- compound basic idea + continuation
- compound basic idea + consequent
- it would present an ordering of functions (concluding followed by initiating) that is temporally illogical
- antecedent + cadential; compound basic idea + continuation becomes cadential
- compound basic idea + consequent
- if the melodic "background" of the idea in mm. 3–4 resembles that of the basic idea in mm. 1–2