1. My manager wasn't in the office when I arrived. He had gone out.
2. She said that te launch of the product had been a great success.
3. I'm afraid I didn't see your presentation. By the time I arrived, you had finished.
4. Fred had already worked in six different companies by the time he was 35.
5. We told the clients that we had sent the invoices to them the previous month.
6. She mentioned that the situation had already existed for many years.