I'm assuming you mean something like, "You want to go to the movies this weekend?"
In English, the important identification for questions is tone: one that rises at the end of the sentence. Sometimes we're just being lazy and dropping the word "Do" like I did in my first example:
"Do you want to go to the movies?"
"You want to go to the movies?"
However, we also use affirmative word order when we're surprised by information. For example, I don't like going to clubs, so when I agreed to go out a few weeks ago, my girlfriend said, "You want to go to a club?" because she was surprised.