The secondary triads are ii, iii, vi, and viio. They are named the supertonic, mediant, submediant and leading tone.
- I
- ii Supertonic
- iii Mediant
- IV
- V
- vi Submediant
- viio Leading Tone .
SUBSTITUTION
Each secondary triad is related to a primary triad through two common tones and thus can substitute for the primary triads.
Each secondary triad is related to a primary triad through two common tones and thus can substitute for the primary triads.
You can substitute secondary triads for the following primary triads:
- vi for I
- ii for IV
- iii or viio for V