I usually stay away from discussions of Irish stuff--but I am compelled to add my bit here, since the chords offered don't really follow the tune--Firstly, though it D a fine key, A is better for this on guitar, and G is lifeless--Play it in six/eight time--three counts for each letter(there is one measure between the slash marks)--as to the lyrics--you know where they go--

||A F#m/A A/A F#m/E7 E7/
A A/F#m F#m/Bm E7/A A||