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I had forgotten to have breakfast before I going to the office this morning.
今天早晨去办公室之前，我忘记吃早饭了。
表示过去某一时间或动作以前已经发生或完成了的动作。它表示动作发生的时间是“过去的过去”。
表示发生在过去的动作对过去的某一点造成的某种影响或结果，用来指定在另一个过去行动之前就已经完成了的一个事件。
e.g. By nine o’clock last night, we had
got 200 pictures from the spaceship.
I had been at the bus stop for 20
minutes when a bus finally came.
He said he had worked in that
factory since 1949.
Mr. Smith died yesterday. He had
been a good friend of mine.
Finish the task
1. 过去完成时的构成：_____+___________
2. 过去完成时表示：
__________________________________
__________________________________
3. 过去完成时常与______________________等引导的时间状语连用。
had
过去分词
when, before, by the time
过去某一时刻或动作之前已经发生或完成的动作。
1)当我到达学校的时候，我才意识到我把书包忘在家里了。
_______ I got to school, I realized that I
______ ______ my backpack at home.
2)到我返回学校的时候，铃声已经响过了。
_____ _____ _____ I got back to school, the bell ______ _______.
When
had
left