Unit 2 突破·语法大冲关 同步讲解 【新教材】外研版（2019）选择性必修第二册

过去完成时的被动语态 [观察例句] 1．By nine o'clock last night，200 pictures had been sent from the spaceship. 2．My homework had been finished by 10：00 this morning. 3．She told me that the factory had been closed down. 4．I was told that the task had been finished before I got there. [归纳用法] 一、构成形式 (1)过去完成时的被动语态的肯定式为：had ＋ been ＋ done。 (2)过去完成时的被动语态的否定式为：had ＋ not ＋ been ＋ done。 (3)过去完成时的被动语态的一般疑问式需将had提到主语的前面。 (4)过去完成时的被动语态的特殊疑问式为：疑问词 ＋ had＋ been ＋ done。 二、基本用法 过去完成时的被动语态常用于以下情况： (1)表示过去某一时间以前已经完成的动作，常与by，before等引导的时间状语连用。 The work had been finished by five o'clock yesterday afternoon. 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)用在 told，said，knew，heard，thought等动词之后的宾语从句中。 He 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. [即学即练] 用所给词的适当形