Ahhh, the formal and informal "you"! In English we just have "you", but in German (and some other languages) there is The formal and informal "you". In German it is Sie (formal you), and informal is "du" and "ihr" (which thw book didn't even touch on how and when that gets used). Maybe I'm making it out to be more confusing than it should be, but it did say that if you get confused to whether or not to use the formal or informal you when addressing someone, to just use "Sie" until they ask you to use "du". So confusing, well for me since I'm justnlearning it.