1 The boy was seen by me to enter the room.
2 Will a new film be showed by them next week ?
3 Has the letter been posted by them yet ?
4 He is often seen by to help his classmate.
5 The light must be turned off by you before you go to bed .
6 Who is the book being repaired?
7 All the texts should be learned by heart by the student.
8 Your homework must be handed in by you before five .