Section Ⅷ Grammar单元语法项目(一)——过去完成时语法图解探究发现①A Roman writer called Pliny wrote about a terrible volcanic eruption that he had witnessed as a young man.②By 1748, they had found an awesome historical site.③He had worked in the factory for five years before we moved here.④The film had begun when they arrived at the cinema.⑤I had hoped to meet you at the airport, but I was caught in a traffic jam.⑥That dinner was the most expensive meal we had ever had. ⑦There was a knock at the door.It was the second time someone had interrupted me that evening.⑧I had meant to come, but it occurred to me that I had some work to do.[我的发现](1)过去完成时与特定的时间状语连用，如句②。(2)句①③④中过去完成时用于主从复合句，主从句动作都发生于过去，且有先后关系。(3)句⑥、句⑦中过去完成时用于拥有序数词或最高级的句型。(4)过去完成时表示一种未实现的愿望或想法，如句⑤、句⑧。一、概念过去完成时的基本用法与现在完成时相似，所不同的是：现在完成时的动作须在现在以前完成，过去完成时的动作须在过去某一时间以前完成，也就是说动作发生在“过去的过去”。二、构成主语＋had＋动词的过去分词You abandoned the map because you had learned how to get home.你丢掉地图，因为你已经知道如何回家。三、基本用法1．表示过去的过去表示在过去的某一时间或某一动作之前完成的动作或存在的状态，也就是“过去的过去”。可以用 by, before 等介词短语或一个时间状语从句、用一个表示过去的动作以及通过上下文来表示。By nine o'clock last night, we had got 200 pictures from the spaceship.到昨晚 9 点钟，我们已经收到 200 张从宇宙飞船发来的图片。How long had Mr. Wang taught in the middle school before he came here?王老师来这里之前，在中学教了多长时间的书？I was very sad at his death. We had been good friends since our childhood.他的去世使我很悲伤。我们自童年时代起就是好朋友。[即时演练 1] 用所给词的适当形式填空①By the end of last month he had_work...
