1. His mother said she had worked in this company for many years.
2. These girls knew that Ann had attended English lessons in London a few years ago.
3. My parents said they were watching TV.
4. Her teacher said she had already checked their works.
5. The children believed that their teacher had been working in this school for ten years.
6. My friends said they'd been doing their homework at 10 o'clock at this time.
7. The boys saw that Tom was working in the garden.
Объяснение: