5.5The basic harmonic sentence

Play slowly:

C | F | G7 | C

Think:

home | departure | tension | home

Again:

I | IV | V7 | I

That pattern is more important than the actual notes.

Transpose it.

In G:

G | C | D7 | G

In D:

D | G | A7 | D

In F:

F | B♭ | C7 | F

Same functional story.