I–IV–V: Classic Blues & Rock
I–IV–V is the original power trio of functional harmony. In G major, G–C–D gives you tonic, lift, and dominant tension with almost no theory overhead. Rock and blues lean on it because it leaves room for rhythm, riffs, and attitude—your guitar part can carry the personality while the harmony stays clear. Melodies work easily because most notes of the major scale sound stable over at least one of these chords, and the V chord (D) naturally wants to fall back to I (G) for a satisfying cadence. You’ll hear this shape in countless folk songs, early rock ’n’ roll, punk, and blues-based jams. To spice it up, turn D into D7 for extra pull, or use suspensions (Dsus4) to create that classic “lean then resolve” feel without changing the basic roadmap.
- Key
- G major
- Tempo
- 100 BPM
- Groove
- rock
Play it on guitar
Start slow, keep your right hand steady, and aim for clean changes on the downbeats. Once it’s comfortable, add a groove and increase tempo.
Capo suggestion: try capo 0 and play in G shapes for open chords.
Chords: G – C – D – G
Roman numerals & theory
Roman numerals describe the chord’s function relative to the key. This helps you transpose the “shape” to any key without memorizing new chord names.
In G major: I–IV–V–I
Variations (keep the progression, change the feel)
- • Add 7ths for color (try maj7 on I, m7 on vi, and V7 before resolving).
- • Use a sus4 resolve on the V chord (e.g. Gsus4 → G) to create tension and release.
- • Change the rhythm instead of the chords: try anticipations (hit the next chord on the “and” of 4).
- • Arpeggiate the top notes to create a hook while the harmony stays the same.
- • Borrow a darker chord for contrast (in a major key, try iv for one bar before returning).
Related
FAQ
Select a chord below to start building your progression