What is your problem when you try to pass your training partner's guard?
Passing the guard, you may not even have time to think about next move. However, you may solve this problem by drilling guard pass (Do you even practice guard pass drilling?). To be honest, the writer myself seldom practice drilling in any position -- we are all human ;) .
Although an inner-evil entices you to just play guard, I believe that it is better for you to have strong top game (if you are an active competitor). Let's equip with strong guard pass game!
Hope following instructional videos will help your game!