So here's how to interpret each written beat of the exercises, based on how the notes sound; after p. 32 you'll be dealing with rhythms that are equivalent to the ones below, but are written differently.
Play written 8th notes as alternating swing 8ths:
Play written quarter notes (or the equivalent) as an 8th note triplet with a RLL sticking, accenting the right hand:
Play notes sounding on an & only as a triplet with a RRL sticking, accenting left:
On beats where there's no note sounding— like if there's a rest, or the end of a tied/dotted note, or some combination thereof— use whichever triplet sticking you like, but don't accent.
Examples after the break:
