35, Those flowers are being watered by her.  
36, Our reports had been finished by us in three months. 
37, That car ought to be sold by him.        
38, She has been seen at the station by us.        
39, Students will be given the books by the librarian. 
40, I was shown the way to Thames River by him.
41, He was learning in his room at 8.30 yesterday.   (Câu này không thể chuyển sang dạng bị động do không có đối tượng mà động từ chính hướng tới)     
42, An envelope can be bought for me by you.

43, A car has just been bought by us.

44, He has just been met by us.        
45, The church was visited by them two years ago. 
46, The food is being cooked in the kitchen by Mrs. Green.
47, The patients were examined by the doctor.
48, That noise was made by these boys.     
49, These exercises can't be done quickly by me. 
50, The report had been finished by her by noon.
51, We have been disappointed by the movie very much. 
52, The bill has to be paid by them before the first of the month.