Inthe key of E we would use the chords: E and A

Play-along backing track with chord sheet here..

Example songs using  I  IV  progression

Feelin’ Alright - Joe Cocker

This one is in the Key of C.  Chords used: C7  F7.

Imagine - John Lennon

This track is in the key of B.  Each verse has the I  IV chords only (B and E).

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