Progression
The I–IV–V in E major
I–IV–V in E major plays E, A and B — I, IV and V — across 4 chords. The three-chord song — folk, country and early rock's whole harmonic vocabulary in one loop.
The chords, in order
1EI
2AIV
3BV
4EI
I–IV–V in E major plays E, A and B — I, IV and V — across 4 chords. The three-chord song — folk, country and early rock's whole harmonic vocabulary in one loop.