Question Formation: Yes/No, WH- and Tag Questions
The rule
For standard yes/no questions, put be, an auxiliary or a modal before the subject. Use do/does/did with ordinary present/past simple verbs. WH- questions ask for details; subject questions have a different pattern. Usual confirmation tags reverse positive/negative polarity.
See an example: Question Formation: Yes/No, WH- and Tag Questions
Yes/no: Does the class start at six? WH-: When does the class start? Subject: Who called Arun? Tag: The class starts at six, doesn’t it? Indirect: Can you tell me where the class starts?
