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1. ( - ) He didn't write a book
( ? ) Did he write a book?
2. ( - ) She wasn't my boss
( ? ) Was she my boss?
3. ( + ) They built a new house.
( ? ) Did they build a new house?
4. ( + ) I was at the concert last Sunday.
( ? ) Was I at the concert last Sunday?
5. ( + )You bought clothes in this clothes shop.
( - ) You didn't buy clothes in this clothes shop.
6. ( + ) They were born in Korea.
( - ) They weren't born in Korea.
7. ( - ) He didn't swim in the lake.
( ? ) Did he swim in the lake?
8. ( - ) We were not at the gym last week.
( ? ) Were we at the gym last week?
9. ( + ) She went to her office by car.
( ? ) Did she go to her office by car?
10. ( + ) He was a good boy.
( ? ) Was he a good boy?