This is not enough because if you wanted to convey something like negation, you want to say, "I don't want soup," then you can't do that by asking a question.
کافی نیست چون اگر بخوای چیزی رو به صورت منفی انتقال بدی، مثلا: "من سوپ نمی خوام"، نمی شه در موردش سوال بپرسی.