đổi sang dạng câu : S + was/were + being + pp + ( by O )
1. They were carrying the injured player off the field
The injured player off the field was being carried
2. An old man was sweeping up the dead leaves
The dead leaves were being swept up by an old man
3. Martha was delivering the documents to the department
The documents were being delivered to the department by Martha
4. People were watching the match on Tv
The match on Tv was being watched