"Do you think I can?" Hermione asks uncertainly, looking up at him. "I've been trying to practice at it, but haven't had much luck, since I don't really know what's all that different between my magic-... that is, the magic that I'm used to versus the magic here. I'm not sure how I'd really learn, since it would probably require someone familiar with both sets of magic. Or, at least, comfortable enough with a student with a very different way of practicing it."