The best suggestion would be to have him visit one of the many web pages that show the guitar tabs. Most of us old country boys know how to play a G7, but a G/F just ain't in our heads!

Good Luck,

Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!

K+E=W (Knowledge Plus Experience = Wisdom.)