Grade7 (scales&arpeggios)

dominant seventh = V7 包括 s t r f 四個音
in root position即係 s t r f 四個音按次序彈就可以
eg. chords of dominant seventh in root position C major 即係要彈 C major o既 s t r f 呢四個音，亦即係 G B D F
又eg. chords of dominant seventh in root position G major 即係要彈 G major o既 s t r f 呢四個音，亦即係 D F# A C