Change these sentences to negative sentences without changing the meaning-
1. He is very active in his job.
2. It is really useful .
3. This is fair.
4. Our teacher always reach in time.
5. Her design is perfect.
6. The boy was really fast to reach.
7. My brother is able to solve any math.
8. We need efficient person.
9. The situation was avoidable.
10. He is present as an authorised representative.
