Chord Progressions using I IV V and VI.

Songs are based on chords. In a major key certain chords will be major and others will be minor.  Chord numbers are written as roman numerals.

In C major the following chords apply.

I = Major = C

IV=Major = F

V=Major = G

VI=Minor = Am

In a minor key the common chords are

I = Minor = Cm

IV = Minor = Fm

V = Minor = Gm

VI = Major = A