In Lesson 2 you were introduced to the 12 Bar Blues progression.
Underneath each chord roman numerals (as introduced in Lesson 6 ) have been written to indicate the basic chords used in 12 bar progressions. It is important for you to remember that 12 Bar Blues in any key uses the 3 chords, I, IV and V in the following sequence:
For example, in the key of C the I, IV and V chords are C, F and G respectively. In the key of G the I, IV and V chords are G, C and D.
See Appendix Three for a list of songs which use the 12 Bar Blues progression.