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16. How many lessons are going to be learned by you next month?
17. I wasn't introduced to her mother.
18. Electric lights had been invented before I was born.
19. Cows are usually milked by farmers twice a day.
20. A large hole was being dug in the ground by workers.
21. Before exams were taken,their lessons had been revised.
22. A woman was knocked down in the street by the car.
23. When he came home, a newspaper was being read by his father.
24. Grass on the meadow was being eaten by cows. 
25. You will be met at the station by my cousin.
26. Her own company is being run by her.
27. Umbrellas and raincoats must be left in the cloakroom by visitors.
28. John's homework hasn't been finished by him.
29. The door will be shut if you like.
30. A horrible accident has just been seen by us.
31. What language is spoken in this country?  

32. Cakes were being made by Mrs.Smith at 7 p.m.
33. That house isn't going to be bought by him.
34. When I was 18 years old, I was allowed to go out by my parents in the evening.
35. 3 hostages have been kept by this terrorist  for a week.
36. You haven't been seen by him for years.