Questions with who, what, where, when, why, which, how
Wh-word + auxiliary + subject + verb (What do you want?)
Wh-word + auxiliary + subject + not + verb (Why don't you come?)
Wh-word + auxiliary + subject + verb?
💡 When wh-word is subject, no auxiliary needed: Who called? What happened?
✓Where do you work?
✗Where you work?
Need auxiliary 'do' in questions.
✓Who called you?
✗Who did call you?
Who is subject; no auxiliary needed.
✓What did she say?
✗What she said?
Object question needs auxiliary.