Finding it IMPOSSIBLE to get a hit on my Sifu when we spar..........?

He wouldnt be a Sifu if u could with ur skills now would he? Take ur time and observe his actions and try to see what hes setting u up for like a game of chess. If u dont have the skills to hit him then focus on neutralizing his attacks. There are strategies for everything. Just switch it up once in a while and learn from ur mistakes.