大小七：d-#f-a-c，f-a-c-be，e-#g-b-d，g-b-d-f小小七：d-f-a-c，f-ba-c-be，e-g-b-d，g-bb-d-f减小七：d-f-ba-c，f-ba-bc-be，e-g-bb-d，g-bb-bd-f减减七：d-f-ba-bc，f-ba-bc-bbe，e-g-bb-bd，g-bb-bd-bf
