Hi everyone, I'm a new member. I've found really practical this site and lessons, Justin is an awesome teacher. In this particular lesson, Justin takes the I-V/IV-IV and then he resolves that to IV minor. I've seen that so many times and still wondering not only why, but if I could take that major to minor in every chord, or just when I go to the IVth one... And I've also seen that change using extended dominant chords.
Example: C-7 F7 F-7 Bb7 Bb-7 Eb7.
Can anyone explain that particular change and usage please?
Thanks a lot for making this web site free!