I am working on changing keys in a song I'm writing. To get some ideas on how to do this, I have been looking at some songs that do it, and I'm a little stumped. In Born to Run, Springsteen plays in E for a while, and then in the bridge before he changes to F, he is playing D, G, A, and C chords. None of those except A actually fit into the key of E. How does that work?