2022年初中英語：過去完成時的被動語態

過去完成時的被動語態常用于以下情況：

(1)表示過去某一時間以前已經完成的動作，常與by, before等引導的時間狀語連用。

By the time he got to the school, the first period had been finished.

The classroom hadn't been cleaned before the teacher came.

How many buildings had been destroyed when the hurricane ended?

Had the new plan been discussed before the meeting?

(2)在 told, said, knew, heard, thought等動詞之后的賓語從句中，若表示過去某一被動動作時，用過去完成時。

The said the production costs had been reduced.

The boy was reminded that his homework had not been handed in.

The media reported more than 1,000 people had been killed in the earthquake.

(3)根據語意可以判斷出動作先后的被動語態，用過去完成時。

As the assignment had been done, he went on to search the Internet.

He did what he had been told to

另：當從句由 after，before，when或 as soon as引導時，主句和從句都可以用一般過去時。

When he arrived, he called her.

They locked the door before they left.

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