1、過去發(fā)生的兩個(gè)動(dòng)作，先發(fā)生的用過去完成時(shí)
　　With their help I realized that I had been wrong.
　　2、過去某時(shí)以前發(fā)生的動(dòng)作或情況
　　He hasn’t finished yet.
　　He didn’t finish yesterday evening.
　　He hadn’t finished by yesterday evening.
　　3、常用過去完成時(shí)的情況
　　①No sooner…than…. Hardly…when…
　　No sooner had he begun his speech than he was interrupted
　　②expect, hope, think, want, suppose等動(dòng)詞的過去完成時(shí)（或一般時(shí)）表示想做而未做的事
　　I had planned to send him a telegram, but I didn’t manage it.
　　4、使用過去完成時(shí)的必要性和非必要性
　　①句意十分清楚時(shí)，可用一般時(shí)
　　After I finished, I went home.
　　②常用一般過去時(shí)表示依次發(fā)生的動(dòng)作
　　I got out of the taxi, paid the fare（車費(fèi)) and managed it.
　　③有時(shí)必須明確，特別是含when時(shí)
　　When I arrived, Ann left.
　　(同時(shí)見到）（見到Ann)
　　When I arrived, Ann had left.
　　（先后發(fā)生）（沒見到）
　　5、常用過去完成時(shí)的時(shí)間主狀語
　　by the end of +　過去時(shí)間 ； by + 過去時(shí)間
　　by the time + 過去時(shí)間；　過去時(shí)間 + before
　　比較：
　　By the time he was 11, he had learned 3000 words .
　　By the time he is 11, he will have learned 3000 words.
　　By the time last week, I had learned 3000 words.
　　By the time next week, I will have learned 3000 words