1. - She doesn't study 3 hours every day. ? Does she study 3 hours every day?
2. - He isn't driving his new car. ? Is he driving his new car?
3. - The police haven't caught a robber. ? Have the police caught a robber?
4. - I hadn't finished cooking before the film began. ? Had I finished cooking before the film began?
5. - You couldn't give me your key. ? Could you give me your key?
6. - We weren't walking along the street. ? Were we walking along the street?
7. - It won't (will not) rain tomorrow. ? Will it rain tomorrow?
8. - My brother didn't arrive yesterday. ? Did my brother arrive yesterday?