I have one question about the CDs. On the first lesson, they say "Vous êtes américain." to mean "You are an American." Then they say "Je suis américain." to mean "I am American."
I understand that much. The thing I don't understand is when it is reversed, and turned into a question:
"Est-que vous êtes américain?"
However, the way I've been learning it up till now is that to ask a question like that, you could just say:
"Vous êtes américain?" (leaving off the "Est-que.")
Are both of these correct? And can you use "Est-que" to turn any statement into a question, like that?