Ответ:

2. Larry had been looking for his glasses for over an hour before he founf them.

3. They had been playing football over an hour before Tom scored.

4. Jane had been driving for over two hours before she reached the smiths' cottage.

5.Mr smith had been working in the company for ten years before he decided to leave

Объяснение:

Глянь на учебник там и правила есть и объяснения , я конечно могу написать правила , но это может казаться как другой источник