5.12Example: C–Am–Dm–G7

In C major:

C = I

Am = vi

Dm = ii

G7 = V7

So:

I → vi → ii → V7

Functionally:

tonic → tonic-family → predominant → dominant

Then if we add C:

I → vi → ii → V7 → I

we get:

home → soft departure → preparation → tension → home

Very natural.