American Sign Language: "when"
The sign for "when" is made by holding your left index finger up (if you are right handed). Your palm should face right. Bring the tip of your right index finger near to the tip of your left index finger.
How do you ask when in ASL?
When you want to ask a question in American Sign Language (ASL), you simply sign the question word at the end of the sentence — words such as who, what, when, where, which, why, and how.
What is this in/sign language?
This/it (a determiner in ASL). ... A common determiner in ASL signing is the handshape "Y" for either "this" or "that". And, the other common sign is "THAT-ONE" (a gloss that it's not really "ONE").