There is a rule used almost subconsciously by almost all English speakers (and I'm sure it applies to many other languages too) which is that yes/no questions are asked ending with a rising tone, and ...
The wh- questions in sign languages crosslinguistically can be seen in clause-initial or clause-final position or in both positions. They can be seen in one of the positions in question sentence, like ...
In sign languages, the position for content questions is clause-initial, clause-final or both. For instance; TİD (Turkish Sign Language) licenses both. When there is topicalization in the sentence, ...
"What" is defined grammatically as an interrogative pronoun ... used interrogatively in asking for the specification of an identity, quantity, quality, etc. (Wiktionary) In dictionaries, ...