Выполним упражнение, используя Past Perfect Continuous и Past Simple.
- Larry had been looking for his glasses for over an hour before he found them.
- They had been playing football over an hour before Tom scored.
- Jane had been driving for over two hours before she reached the Smiths' cottage.
- Mr Smith had been working in the company for ten years before he decided to leave.
Ответ: смотри выше.