I–ii–IV–V in A♭ Major

Pattern: I – ii – IV – V Chords: A♭ – Bbm – D♭ – E♭

Chord Breakdown

Numeral	Chord	Type	Function
I	A♭ (details)	major	Tonic
ii	Bbm (details)	minor	Supertonic
IV	D♭ (details)	major	Subdominant
V	E♭ (details)	major	Dominant

Harmonic Analysis

This progression moves through A♭ (Tonic) → Bbm (Supertonic) → D♭ (Subdominant) → E♭ (Dominant).

This progression creates a sense of escalating energy by stepping from the tonic through the supertonic and subdominant to the dominant. It provides a satisfying, gradual harmonic build popular in verse sections.

Song Examples

Take Me Home, Country Roads — John Denver
Crocodile Rock — Elton John

Chord Details

A♭ Bbm D♭ E♭

More Progressions in A♭ Major

I–IV–V–I I–V–vi–IV I–vi–IV–V ii–V–I I–IV–V I–♭VII–IV vi–IV–I–V I–V–vi–iii–IV–I–IV–V I–IV I–V IV–V IV–I