Ahhh thanks. I don't actually remember going over that little phrase... I just remember saying things like, "Ich komme aus der USA." I assumed it was, "Wo kommst du aus?"
My vocabulary is limited, and my sentence structure not so complex. I don't know the cases, except for accusative... and that's pretty simple, just der to den.
I haven't actually spoken German in a long time. It's easy enough to understand what someone is saying, but at times I have trouble constructing my own sentences, which is in part because of my limited vocabulary.