We thought we would share with you about Facial Grammar. It is very important to know those Facial grammars, and how to use it. I excerpt this from aslpah.com. It was a good tip.

ASL Linguistics

Here is a little grammar tip for you students out there:

Consider the phrase: “YOUR BOSS NAME?”
In English this might be translated as, “What is your boss’s name?”

This sentence requires an answer other than “yes/no.” It requires the other person tell you a “name.” Since it is not a “yes no” question it is therefore a wh question because it implies the “WH” as in “What” is your bosses name? Even though we don’t sign the “What” explicitly, it is there in our facial expression. The facial expression for a “Wh” question is to furrow your eyebrows a bit. (In thinking of a way to describe the facial grammar for “Wh questions” I would compare it to what a person looks like when he or she is trying to get a better look at something. Their head actually moves forward on the neck about an inch and they squint their eyes a bit.)

The sentence: “YOU LIKE COOK?”
In English this might be translated as, “Do you like to cook?”
This sentence requires a “yes/no” answer. The concept of “do” is not “signed” but is expressed via facial expressions as raised eyebrows. The head tilts forward just a tad.