Question

1. He will not do his studies. (Change into simple past)
2. He didn't change his mind. (Change into simple present)
3. When did you reach home? (Change into future perfect.).
4. Mike is riding a horse. (Future continuous)
5. She helps her brother. (Simple past)​

Answer 1

1) he wont do his studies.

2) he hasn't changed his mind.

3) when will you reach home?

4) Mike will be riding a horse.

5) She helped her brother.