Rock inverted paradiddle lesson 1 will help you in playing all combinations of the following 2/4 measures.

Rock paradiddle 1
Rock paradiddle 2
Rock paradiddle 3
Rock paradiddle 4

The patterns are based on the inverted (second) paradiddle: RLLR LRRL. Right hand plays ride (or alters between ride/snare), left hand alters between hi-hat/snare.
Go to the paradiddles overview page to view all 2/4 paradiddle combinations.