In the graveyard, Voldemort strips Harry of his blades and forces him to use his wand in their show duel, so he must really lean heavily on his wand in combat for the first time. Once the fight devolves into a melee, Harry will probably summon the weapons to recover them, and fight with a sword and wand for the rest of the evening. In future fights, he’ll favor either sword and wand or knife and wand.