All progressions

I IV V in C: C, F, G

Their roots are the first, fourth and fifth notes of the C major scale. C, F and G are major chords.

1. C

   I

   C E G

   Open in Keyriff

2. F

   IV

   F A C

   Open in Keyriff

3. G

   V

   G B D

   Open in Keyriff

I IV V in other keys

• Db
• D
• Eb
• E
• F
• F#
• G
• Ab
• A
• Bb
• B