It's really easy, the three chords after each line of the verse are just an A shaped bar chord being slid up the neck. Joy to the World (Three Dog Night) Jeremiah was a bullfrog A very good friend of mine. I never understood a single word he said But I helped him to drink his wine Yes he always had some mighty fine wine Chorus Singing Joy to the World To all the boys and girls Joy to the fishes in the deep blue sea Joy to you and me.