BookatlasPiano Rabbit Hole: Improvisation Theory & Practice
4010 / 18210 · Workshop 22 — “There Is No Greater Love”: Major-Key Fluency, ii–V Compression, Secondary Dominants, and Making a Standard Feel Effortless← prev⊞ allnext →

22.47Level 22 — melody note determines borrowed chord usability

If melody is G over E♭m:

G conflicts with the chord's G♭.

That may make borrowed iv impossible at that exact moment.

So check the melody.

Never apply substitutions mechanically.