This song has been recently done by Green Day, but here's the
John Lennon version. There are two guitars, where one actually
is the melody line. The up and down arrows indicate strumming
patterns. Pay close attention to the bass notes, which will be
on the Low E string and the A string.
Here is the acoustic guitar, in standard tuning:
Intro/Verse 1
This is just a variation of Am and G over and over, with a D
thrown in near the end. The only things to watch for are the hammer-ons
and the time changes. However, you probably won't even notice
the time changes.
Here is the melody that accompanies it, in standard tuning: