Passive voice(the past progressive tense)
1/Someone was recording our conversations
2/They were preparing the meal when I saw them
3/They were cleaning the room when I arrived
4/Mary was helping her mother in the kitchen at that time
5/The resident was signing those papers
6/Lan was repairing those reports when I came to see her
7/Waiters were serving customers politely
8/Peter was watching television in the living room
9/Tom was writing a letter to his friends
Passive voice(the past progressive tense)
1/Someone was recording our conversations
=> our conversations were being recorded
2/They were preparing the meal when I saw them
=> the meal was being prepared when i saw them
3/They were cleaning the room when I arrived
=> the room was being cleaned when i arrived
4/Mary was helping her mother in the kitchen at that time
=> her mother was being helped in the kitchen by Mary at that time
5/The resident was signing those papers
=> those papers were being signed by the resident
6/Lan was repairing those reports when I came to see her
=> those reports were being repaired by Lan when i came to see her
7/Waiters were serving customers politely
=> customers were being served politely by waiters
8/Peter was watching television in the living room
=> television was being watching in the living room by Peter
9/Tom was writing a letter to his friends
=> a letter was being written to his friends by Tom
