major – major 7th
– major – major 7th in several positions
____ I7 in major
_______ after the same triad
_______ after another triad
_______ with other 7th chords
____ IV7 in major
_______ after the same triad
_______ after another triad
_______ with other 7th chords
____ VI7 in minor
_______ after the same triad
_______ after another triad
_______ with other 7th chords
____ IIIα7 in minor
_______ with other triads
_______ with other 7th chords