Questions: Phrase Structure: Antecedent and Consequent

Question 1

You are analyzing an eight-bar melody. The first four bars end on a V chord (half cadence), and the second four bars begin similarly but end on a I chord (authentic cadence). What structure does this represent?

• A. Two independent phrases with no structural relationship
• B. A single phrase extended over eight bars
• C. An antecedent–consequent pair (period) — the half cadence creates a question, the authentic cadence provides the answer
• D. A consequent phrase followed by an antecedent phrase

Answer: (C)

This is the classic antecedent–consequent structure. The antecedent phrase ends with a half cadence (V), creating an open, inconclusive resting point — the musical 'question.' The consequent phrase begins similarly but resolves definitively to the tonic with an authentic cadence — the 'answer.' Together the two phrases form a period. Note that the antecedent comes first and the consequent second, not the reverse.

Question 2

What determines where a musical phrase ends?

• A. A fixed rule that phrases must be exactly four measures long
• B. The key signature and time signature of the piece
• C. The harmonic and melodic structure — specifically the arrival of a cadence
• D. The number of beats since the last phrase ended

Answer: (C)

Phrase length is determined by the music's harmonic and melodic logic, not by a fixed measure count. A phrase ends when a cadence arrives — the harmonic motion comes to a resting point. Four-bar phrases are common because four measures often provides the right space for a melodic idea to depart and arrive at a cadence, but Haydn, Mozart, and Beethoven regularly write phrases of 3, 5, 6, or more bars when the harmonic motion demands it. The meter itself does not determine phrase length.

Question 3

An antecedent phrase creates a sense of incompleteness because it ends with a cadence that does not fully resolve to the tonic.

• T. True
• F. False

Answer: True

This is the defining characteristic of the antecedent phrase. It most commonly ends with a half cadence (arriving on V), which is harmonically unstable — V wants to resolve to I but has not yet done so. This open ending creates an expectation of continuation, the musical equivalent of a question asked but not yet answered. The consequent phrase provides that resolution by ending with a full authentic cadence to the tonic.

Question 4

Most phrases in tonal music should be exactly four measures long — composers who write longer or shorter phrases are breaking the rules of phrase structure.

• T. True
• F. False

Answer: False

Phrase length is flexible and determined by harmonic and melodic structure, not by a rule requiring four measures. Common lengths include 2, 4, 8, and 16 bars, but composers frequently extend phrases by delaying the expected cadence — what is called a phrase extension. Haydn in particular is famous for these extensions. A 5-bar phrase that began as a 4-bar phrase stretched by one measure is not rule-breaking; it is a deliberate compositional choice that makes the arrival more interesting.

Question 5

What distinguishes an antecedent phrase from a consequent phrase, and how does this difference create the sense of musical question and answer?

Model answer: The antecedent phrase ends with an inconclusive cadence — typically a half cadence on V — that leaves the harmony unstable and creates an expectation of continuation. The consequent phrase begins similarly (often with the same or related opening material) but pushes to a full authentic cadence on I, providing harmonic resolution. The antecedent is the 'question' because it ends on an unstable harmony that needs resolution; the consequent is the 'answer' because it delivers that resolution. The sense of question and answer comes from the contrast between an open harmonic ending and a closed one.

The cadence type is the key functional marker. Half cadence = open, unstable, questioning. Authentic cadence = closed, stable, resolved. This is why cadence study is a prerequisite — without understanding cadence types and their functional differences, antecedent–consequent structure cannot be perceived or analyzed.