1. After the doctor ahd given me a treatment, I went to the chemist's.
2. Before Bob joined tennis club, he had been a member of our school football team.
3. Nick had recovered from his illness by the time his birthday came.
Объяснение:
Past Perfect ставится, если одно из действий происходит раньше, чем другое. То действие, которое раньше, ставится в Past Perfect, действие, которое позже - Past Simple.