Either hand can be used to form a fist with only the index finger extended and the palm facing downward. Proceed to draw a curve in the air that represents the bell part of a question mark in the air. Curl in the index finger slightly while continuing the motion and then extend it again to draw the dot at the bottom.
Point to yourself to sign 'I', sign 'have' by bringing both bent hands to your chest, and then use your dominant index finger to draw the question mark shape in the air.
After signing 'I' and 'ask', draw the question mark in the air. Make sure to finish the sign by extending your index finger to clearly dot the bottom of the shape.
Sign 'that', followed by 'good' moving from your chin to your opposite hand, and finish by tracing the question mark shape in the air with your dominant index finger.
Point to yourself to sign 'I', sign 'have' by bringing both bent hands to your chest, and then use your dominant index finger to draw the question mark shape in the air.
After signing 'I' and 'ask', draw the question mark in the air. Make sure to finish the sign by extending your index finger to clearly dot the bottom of the shape.
Sign 'that', followed by 'good' moving from your chin to your opposite hand, and finish by tracing the question mark shape in the air with your dominant index finger.
You should draw the question mark exactly as you would write it on a piece of paper. Do not try to flip it backward for the other person to read; fluent signers are used to seeing it drawn from the signer's perspective.
While this sign specifically represents the noun 'question' or the punctuation mark, the verb 'to ask' is very similar. 'Ask' often uses the same index finger motion but moves directionally toward the person being asked.
Keep it comfortably within your signing space, right in front of your upper chest or shoulder. Drawing it too large can look exaggerated. A quick, concise curve and dot about the size of a small plate is ideal.
