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Interrogative:

1. Are you an engineer?

2. Is his little brother a schoolboy?

3. Are her patents at home?

4. Is our teacher at the library?

5. Are the cars in the street?

6. Is the theatre in the centre of the town?

7. Is my cousin at school?

8. Are they good sportsmen?

9. Is his father a worker?

10. Is the street narrow?

Negative:

1. You aren't an engineer.

2. His little brother isn't a schoolboy.

3. Her parents aren't at home.

4. Our teacher isn't at the library.

5. The cars aren't in the street.

6. The theatre isn't in the centre of the town.

7. My cousin isn't at school.

8. They aren't good sportsmen.

9. His father isn't a worker.

10. The street isn't narrow.