0. He is writing a book.
→ A book is being written by him.

1. He was fixing a computer when I came.
→ The computer was being fixed by him when I came.

2. She turns off the light before she goes to bed.
→ The light is turned off by her before she goes to bed.

3. I am going to clean the floor this afternoon.
→ The floor is going to be cleaned by me this afternoon.

4. I water the flowers every morning.
→ The flowers are watered by me every morning.

5. He is reading a novel.
→ A novel is being read by him.

6. Mum is making some clothes for the party.
→ Some clothes is being made by Mum for the party.

7. She was cooking a meal when the phone rang.
→ A meal was being cooked by her when the phone rang.