Originally Posted by
JungleJimmy
Partially correct. You are right."Are you going to the mall?" has no issues grammatically speaking. But really, there's nothing wrong with either. Like I said you're is you are. So switching you are with are you doesn't make "you're" wrong. Because if you were to say "You're going to the mall?", it's more like a reaction. So let's say a friend says out of the blue, "Hey, I'm going to the mall."
Then someone would probably say "Wait, you're going to the mall?" I added wait because that's common. But it still contains you're, and still makes sense. You said "Are you going to the mall?" That's different. You see if someone said "Hey, I'm going to the mall.", it wouldn't make sense to say "Are you going to the mall?" Because you wouldn't ask that since you already know that your friend is going to the mall. You see what I mean? Basically what I'm saying is that "Are you going to the mall?" Is correct, and there's no grammatical issues there. BUT it has a different meaning.
So here's one more example for "Are you".
You don't know where your brother is when you are supposed to pick him up. You text him and you say "Are you here? I'm waiting outside." Because saying "You're/you are here?" doesn't really sound right. Then the brother could say "I'm already at home." Your response would be the reaction. "You're already at home?" Get it? You said "Are you here?" Because you don't know if your brother is there. And your response to him saying he's home wouldn't be "Are you already home?". It would be "You're already home?" Because again, you would already know that he is home, so there's no point in asking if he is home. Then you will go back and beat him up for wasting your time. Jk. I hope this made sense.