I+7–IV

The I+7–IV progression treats the tonic as a secondary dominant with augmented coloring, creating a chromatic approach to the subdominant. The augmented seventh chord combines the raised fifth's upward pull with the flat seventh's dominant function, creating a powerful forward motion toward IV. This is common in blues and jazz where the I chord is often treated as a dominant seventh moving to IV.

Pattern: I+7 – IV Example in C Major: Caug7 – F

Genre: jazz, blues, rock Difficulty: intermediate

Choose a Key

C Major Caug7 – F G Major Gaug7 – C D Major Daug7 – G A Major Aaug7 – D E Major Eaug7 – A B Major Baug7 – E F♯ Major F♯aug7 – B F Major Faug7 – B♭ B♭ Major Bbaug7 – E♭ E♭ Major Ebaug7 – A♭ A♭ Major Abaug7 – D♭ D♭ Major Dbaug7 – G♭

Song Examples

Stormy Monday — T-Bone Walker
Red House — Jimi Hendrix
Baby What You Want Me to Do — Jimmy Reed

Related Progressions

Iaug–IV Vaug7–I I7–IV7