Will Harry learn to fight?

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In the first book, there wasnt much actualy wizard duels. No feats of strength. Only some mindbending puzzles and dots for Harry and his buddies to connect. Not only that, Snape was still sort of on his side and Dumbledore was alive. And Voldemort was literaly a shadow of his former self. So he had all the help he could possibly want. That didn't change one bit until the fourth book when the Triwizard Tournament came along and the chance for some serios wizardly firepower came along. But we were let down. The most interesting and usefull curse Harry learned was the Summoning charm, and the Four points charm. Thats it? Now we know if Voldemort throws Harry down a well that Harry will know which direction he has to climb, and that he'll be able to get a rope. Whoopy. But what if Volde isnt so nice? Has Harry actualy learned any defensive or offensive spells to help him? He can take wizards wands way. But how can he take at least 10 away at once? And even if some stroke of luck hits him and he does, he still has 10 very angry, very evil people who want nothing more than introduce his liver to the daylight. And Harry has already proven he's no good with the unforgiveable curses. Unless that changed when Dumbledore died, but I doubt that. And my last bit of doubtfullness is Harry's duel with Bella. In the main courtyard of the ministry, Harry and one of Volde's supporters dueled. Was she even one of his strongest? I don't think so. His most cunning? Certainly not or she would have gotten off. Did Harry leave a scratch on her? Maybe a bruise if he's lucky. How will Harry Potter, the straightedge hero of our time defeat a wizard who could kill Harry six ways from sunday if it was just a test of knowlege?