1. When we (arrive)arrived, the show (begin) had already begun.
2. I (come)came to see her but she (not be)wasn't at home. Her mother (say)said she (go)had gone out with her friends.
3. I (not hear) hadn't heard from him for years before I (meet)met him again yesterday.
4. When I (do)did my homework, I (watch)had watched a game show on TV.
5. Daddy (get)got angry because Tim (lose)had lost his passport.
6. - When did you leave the office? – When I (type)had typed the report.
7. It was the best film I had ever (see)seen.
8. By the time he (leave)left, he (turn) had turned off all the lights.
==>giải thích:thì quá khứ hoàn thành diễn tả hành động xảy ra trước 1 hành động khác trong quá khứ
==>when+S1+Ved/c2...,S2+had+Ved/c3
=>before+S1+Ved/c2...,S2+had+Ved/c3
=>it/this+was+the best+noun+S+had+(ever)+Ved/c3