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Grammar referencea2
Question Forms
Wh- Questions
Question words and word order.
Explanation
Wh- words replace the missing information and come first, followed by the auxiliary and subject. When the question word is the subject, there is no auxiliary: who called, not who did call.
Examples
- Where did you park the car?
- How long have you been waiting?
- Who wrote this letter?
Common mistakes
Where you parked the car?
Where did you park the car?
Needs the auxiliary.
Who did write this letter?
Who wrote this letter?
A subject question takes no auxiliary.
How long you have been waiting?
How long have you been waiting?
Auxiliary before subject.