John plays this in G but with a capo on the fifth fret so he actually plays D shapes. Most of it is just D, G, A7 & Em in various combinations. If you watch the video on YouTube you can work most of it out. He also tends to use Gmaj7 in the verse as a quick G rather than playing the full chord. There is a Bm used once and an F# plus one other chord that I am still trying to fathom used in the chorus. Will post gain if and when I sort it out. Great version of a timeless song.