以c为根音，三音，五音，七音，构所有属性的七和弦。谢谢！

根音 C E G B Cmajor7
C Eb G B Cm7
C E G Bb C7
C Eb Gb Bb Cm7-5
C Eb Gb Bbb Cdim7

三音 Ab C Eb G Abmajor7
A C E G Am7
Ab C Eb Gb Ab7
A C Eb G Am7-5
A C Eb Gb Adim7

五音 F A C E Fmajor7
F Ab C Eb Fm7
F A C Eb F7
F# A C Eb Fm7-5
F# A C Ebb Fdim7
七音 Db F Ab C Dmajor7
D F A C Dm7
D F# A C D7
D F Ab C Dm7-5
增五就不列了~不常用
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