I7–IV7–I7–V7 in B♭ Major

Pattern: I7 – IV7 – I7 – V7 Chords: B♭7 – E♭7 – B♭7 – F7

Chord Breakdown

Numeral	Chord	Type	Function
I7	B♭7 (details)	dominant seventh	Tonic
IV7	E♭7 (details)	dominant seventh	Subdominant
I7	B♭7 (details)	dominant seventh	Tonic
V7	F7 (details)	dominant seventh	Dominant

Harmonic Analysis

This progression moves through B♭7 (Tonic) → E♭7 (Subdominant) → B♭7 (Tonic) → F7 (Dominant).

This four-chord dominant seventh cycle adds extra blues grit to the basic blues shuttle. Every chord is a dominant seventh, creating constant harmonic tension and a rich, bluesy texture.

Song Examples

Got My Mojo Working — Muddy Waters
Everyday I Have the Blues — B.B. King

Chord Details

B♭7 E♭7 F7

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