To preface my question: If you were to play a I-IV-V progression starting with an E-shaped barre chord with a root on the 6th string as the I chord, the IV and V chord are played using A shaped barre chords with a root on the 5th string. So for example if I start with a C chaped barre chord as my I chord, what shape is used to play the IV and V? Or if I start with a G shaped barre chord? What shaped barre chords go together like how E and A shapes go together? Or is this more a music theory question?