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We’ll be using 5 chords in the G chord family: Em, G, Cadd9, Bm7, and Am7.
The song is in 3/4 time (3 beats per measure) with that swing type feel to it. Each chord will last for 2 measures (or 6 beats). For the strum pattern, we’ll use only down strums with an up strum thrown in at the transition of chords:
D / D / D / D / D / D U
So as you strum up, your hand will be switching from one chord to the next, giving you the time between 2 beats to make the switch. Practice the song slowly, and speed it up as you get more comfortable with the transitions.
Easy enough, I hope.