Bass notes and chord progressions (guitar I)

One of the beginning techniques is the ability to separate a bass note from a chord strum when playing a chord progression. Guitarists should strive to use the rest stroke on the bass strings. Let that pick come to rest on the next string after playing the bass note and before strumming the chord.
I am posting a chord progression annotated with the proper bass strings circled beneath the chord. This is the basic progression for the Beatle's song, I Get By With a Little Help From My Friends.