Use the numerals to understand patterns
| Scale-degree chord | C major example | G major example | Role in a beginner progression |
|---|---|---|---|
| I | C (C–E–G) | G (G–B–D) | Home chord |
| IV | F (F–A–C) | C (C–E–G) | Movement away from home |
| V | G (G–B–D) | D (D–F♯–A) | Often leads toward I |
| vi | Am (A–C–E) | Em (E–G–B) | Minor-color contrast |
These are teaching descriptions, not rules that every song must follow. A phrase can stop on any chord, and harmonies can function differently in other contexts.
Original four-bar study: three primary chords
Bar 1 C (I), bar 2 F (IV), bar 3 G (V), bar 4 C (I). Count four steady beats per bar and listen for the return from G to C on the final bar. This simple V→I ending helps locate the tonic by ear.
Original four-bar study: color change
Bar 1 C (I), bar 2 G (V), bar 3 Am (vi), bar 4 F (IV). Instead of resolving on C, repeat the four bars so F loops back to C. Compare the feeling of the end of this loop against the first study; neither is intrinsically sad or happy for every listener.
Transfer the idea into another key
Say the numerals first, then substitute G–D–Em–C in G major. You preserved the relationship between chords while changing note names. If D major sounds wrong, check its F-sharp: D–F♯–A. For complete transposition rather than an inversion, follow the key-change worksheet. The I/IV/V scale-degree guide explains where the chords originate.
Sources and scope
Published theory and the original exercises above are editorial work, not a first-hand product test. Merchant statements were checked 28 October 2026. Music examples are original text arrangements; independent musician review remains a required prepublication check.