1. (+) He wrote a book

    (-) He didn't write a book.

    (?) Did he write a book?

2. (+) She was my boss.

    (-) She wasn't my boss.

    (?) Was she my boss?

3. (+) They built a new house.

    (-) They didn’t build a new house.

    (?) Did they build a new house?

4. (+) I was at the concert last Sunday.

    (-) I wasn’t 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.

    (?) Did you buy clothes in this clothes shop?

6. (+) They were born in Korea.

    (-) They weren't born in Korea.

    (?) Were they born in Korea?

7. (+) He swam in the lake.

    (-) He didn't swim in the lake.

    (?) Did he swim in the lake?

8. (+) We were at the gym last week.

    (-) We were not at the gym last week.

    (?) Were we at the gym last week?

9. (+) She went to her office by car.

    (-) She didn’t go to her office by car.

    (?) Did she go to her office by car?

10. (+) He was a good boy.

      (-) He wasn’t a good buy.

      (?) Was he a good boy?