Doesn't this need something to indicate it as a question?
My understanding is that any statement can be interpreted as a yes/no question with the right inflection, although it's less formal than if you use a question structure like "có... không"
I've heard this but isn't the inflection part of the pronunciation? How are you supposed to vary it without changing the word itself?
Vâng, tôi đến từ nước Pháp! :p