Passive voice:

1. I was hated so much by her in the past.
2. A cake won't be given to me by Jane tomorrow.
3. A book is taken to school by him every day.
4. Her work must be finished by David on Friday.
5. I am not given a book every day by him.
6. Her homework is being done right now by her.
7. Some cakes haven't been brought up to now by him.
8. A job had been taken by him before going out.

Relative clause:

1. She, who hated me so much in the past, is now my best friend.
2. Jane, who I asked for a cake, won't give me one tomorrow.
3. The book, which he takes to school every day, is very interesting.
4. David, who must finish her work on Friday, is working hard.
5. The book, which he doesn't give me every day, is my favorite.
6. She, who is doing her homework right now, can't go out with us.
7. The cakes, which he hasn't brought up to now, were supposed to be for the party.
8. The job, which he had taken before going out, was very well-paid.