There are special effects the lefthand does to make more sounds when frailing.
Two of the basic ones are pull-offs and hammer-ons.
Boom Boom | Pluck-Pull Pluck-Pull | Pluck-Hammer Pluck-Hammer
This songs uses very few “frails” (shakas) but does use a couple hammer-ons to get the melody.
Play the tab above and replace the 3rd and 4th lines with these:
|The Basic Frail||Modifying the Boom-Shaka||LeftHand Special Effects||Playing with Special Effects|