Англичане, проверьте, правильно ли я решил. (преобразование предложений из действительного залога в страдательный)

Преобразуйте следующие предложения из действительного залога в страдательный.
1. Charles Dickens wrote very many novels.
2. School children are cleaning the beach.
3. John Perry has already made three records.
4. The policeman caught the burglar.
5. Workers were repairing the bridge.
6. Our teacher is planning a party for our class.
7. A courier will deliver the parcel.
8. They will install central heating in the building.
решение:
1. Very many novels were written by Charles Dickens.
2. The beach is being cleaned by school children.
3. Three records have already been made by John Perry.
4. The burglar was caught by the policeman.
5. The bridge was being repaired by workers.
6. A party for our class is being planned by our teacher.
7. The parcel will be delivered by a courier.
8. Central heating will be installed in the building by them.
Если что то не так сделайте замечание, я в английском вообще слаб.