We usually form wh-questions with wh- + an auxiliary verb (be, do or have) + subject + main verb or with wh- + a modal verb + subject + main verb ...
When what, who, which or whose is the subject or part of the subject, we do not use the auxiliary. We use the word order subject + verb: What fell off the wall? Which horse won?
The above rules are well known to English students. but what are the other rules that we use to form questions in English?
for example, the following question don't follow the above rules.
How about going to the cinema tonight?