大调音阶和弦的功能：和弦有什么功能

Hi. This is Hub Guitar.

Let's talk about chord function.

A chord's function is basically the role it plays within the key.

The most important role in any key is the I chord. Its function is tonic, usually called THE tonic. It is a point of rest.

Other chords that have this function include the III- chord and the VI- chord. Both of these chords share a lot of the notes of the I chord. If we move from the I to the III or to the VI, we haven't done anything very dramatic. In terms of how far we are from home, we're still in the driveway. These chords tend to push away from the I just a little bit, towards the other chords.

After those chords, you have the subdominant chords, II- and IV major. These are a little bit far from home, may be on the sidewalk in front of the house. Once you've played these chords, you can sometimes turn right around and come back home to I. The exception is that sometimes in modern music the IV chord can just turn right around and go back to I. But usually you'll go further to the dominant chord.

The dominant chords are V and VII. Once you play one of these, you're almost certainly going to go back to the tonic I. Again the exception is that sometimes you can just turn right around and go back to the IV chord as a pivot, which can go to the I chord.

So chords have a function defined by the roman numeral and the chord quality. Once you grasp a chord in terms of its function, you will be able to find or create uses for chords of that function, and that will take you a long way in your study of music and how chords work.