By combinations means:
In part 1 they must make combinations with kicks or punches.
In part 2 they must really be active to try to throw/ take down the opponent.
In part 3 they must really try to make a good hold or really try to come out of the hold.
In part 3: As long as there is a real will to fight and when there is a real progress in the engaged technique the action has to continue however that all the fight takes place on the ground.