1. He was said to have swallowed a safety pin.
2. The letter was read again and again last night.
3. How many lessons are going to be learnt by you next month?
4. Eletric lights has been invented before i was born.
5. Japan is known to produce a wide range of cars.
6. Before the exams were taken, their lessons had been revised.
7. When he came home, a newspaper was being read by his father.
8. When I was 18 years old, I was allowed to go out in the evening by my parents.