I–IV–I–V in B♭ Major

Pattern: I – IV – I – V Chords: B♭ – E♭ – B♭ – F

Chord Breakdown

Numeral	Chord	Type	Function
I	B♭ (details)	major	Tonic
IV	E♭ (details)	major	Subdominant
I	B♭ (details)	major	Tonic
V	F (details)	major	Dominant

Harmonic Analysis

This progression moves through B♭ (Tonic) → E♭ (Subdominant) → B♭ (Tonic) → F (Dominant).

This compact four-bar pattern shuttles between the three primary blues chords, returning to I in the middle. It works as a simplified blues form and appears as a turnaround in longer blues structures.

Song Examples

Mannish Boy — Muddy Waters
I'm Your Hoochie Coochie Man — Muddy Waters

Chord Details

B♭ E♭ F

More Progressions in B♭ 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