Here the past action didn't happen a long time ago.

　　Used with time expressions such as when, after, before, as soon as, until, by, for and already

　　Step 3 A Complete the story of Amelia Earhart

　　(1)had seen (2)moved (3)had taken (4)had become

　　(5) had met (6)had begun (7)had started (8)had gone

　　Step 4 B Complete the story of Amelia Earhart

　　(1)surprised (2)was built (3)spent (4)was finished

　　(5) had wanted (6)had received (7)had arrived (8)had hit

　　(9)survived (10)had searched （11）use （12） had caused

　　Step 5 Question

　　How do you know you will use the past tense or the past perfect tense?

　　How do you know you will use the past tense or the past perfect tense?

　　Step 6 Compare Present perfect or past perfect?

　　The present perfect tense is used when we are talking about a past event which relates to the present time.

　　Howard Carter is one of the most famous explorers the world has ever known.

　　The past perfect tense is used when we are discussing the past and want to talk about an even earlier event.

　　Not long after the tomb had been opened, people in Carter's team began to fall ill and die strangely.

　　Step 8The inventor of paper

　　Step 9 Summary

　　一、 主语＋过去完成时

　　＋①when引导的从句(注：从句谓语动词为过去式)

　　＋②by短语

　　＋③by the time引导的从句(注：从句谓语动词为过去式)

　　＋④before引导的从句(注：从句谓语动词为过去式) 例如

二、 1. 主语＋had＋hardly(scarcely)＋过去分词＋when(before)＋主语＋一