所增加的七音在主音和下属音三和弦的情况下成为大七和弦，在自然大音阶的其他音的情况下成为小七和弦。

The seventh so added will be a major seventh in the case of triads on the tonic and subdominant, and a minor seventh in the case of other degrees of the diatonic major scale.

youdao

So we can build triads on each of the members of the scale, and we said that some of these chords tend to be used a lot more than others, that the tonic is very important, the dominant is important, the sub-dominant right next to and below the dominant is important, and we're going to be talking about the VI chord today.

那么我们能够在音阶的各个音上建立三和弦，而且我们说过有些和弦将会比其它的运用更为普遍，基音，I和弦，属音，V和弦，都很重要，紧靠属音的下属音也很重要，我们今天就要讲讲VI和弦。

耶鲁公开课 - 聆听音乐课程节选