1. They were not working on the project all day.
Were they working on the project all day?
2. Last night at 6 pm I was not eating dinner with my friends.
Was I eating dinner with my friends last night at 6 pm?
3. Tom was not climbing a tree when it rained.
Was Tom climbing a tree when it rained?
4. She was not doing his homework when the phone rang.
Was she doing his homework when the phone rang?