Chords in a major key may be borrowed from the parallel minor and chords in a minor key may be borrowed from the parallel major. Continuous use of borrowed chords may effect a modulation to the parallel key.
BORROWED FROM MINOR
FIGURE 14.1. The Borrowed Supersonic from Minor
FIGURE 14.2. The Borrowed
FIGURE 14.3. The Borrowed Subdominant in a Plagal Cadence
FIGURE 14.5. The Borrowed Submediant
FIGURE 14.6. Non-harmonic Tones Used with Borrowed Chords
BORROWED FROM MAJOR
Dominant (maj.) and Dominant Seventh
Non-harmonic tones occurring with borrowed chords must be borrowed from the parallel major.