过去完成时的基本结构：由 had 加动词的过去分词构成。
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 张飞船发来的图片。
I had been at the bus stop for 20 minutes when a bus finally came.当车来的时候，我在车站已等了20分钟。
He said he had worked in that factory since 1949.他说自从1949年以来他就在那家工厂工作。
Mr. Smith died yesterday. He had been a good friend of mine.史密斯先生昨天去世了。他以前是我的好友。
I didn’t know a thing about the verbs, for I had not studied my
I returned the book that I had borrowed.我已归还了我借的书。
She found the key that she had lost.她丢失的钥匙找到了。
He said that he had known her well.他说他很熟悉她。
I thought I had sent the letter a week before. 我认为我一星期前就把信寄出去了。
When I woke up, it had already stopped raining.我醒来时雨已停了。
She didn’t go to bed until she had finished he work.她直到把工作做完之后才睡觉。
After he arrived in England, Marx worked hard to improve his English.
(7)动词think, want, hope, mean,plan,intend等用过去完成时来表示过去未曾实现的想法，希望，打算或意图等。例如：
They had wanted to help but could not get there in time.他们本来打算去帮忙，但没有及时赶到那里。
We had hoped to be able to come and see you .我们本来希望能来看看你。
(8)过去完成时还可用在hardly…when…, no sooner…than…, It was the first (second, etc) time (that)…等固定句型中。例如：
Hardly had he began to speak when the audience interrupted him.他刚开始演讲，听众就打断了他。
No sooner had he arrived than he went away again.他刚到就又走了。
It was the third time that he had been out of work that year.这是他那一年第三次失业了
1. All the tickets had been sold out when they arrived.
2. They said that they had sketched out their work plan.
3. The present and past perfect tenses both belong to the perfect tense.
4. They said that production costs had been reduced.
5. She said she would come as soon as she had done her work.
6. Eric died a few days ago and these years, he had lived as a recluse.
埃里克几天前死了,这些年来, 埃里克都是过着隐士生活. (过去完成时)
7. When I arrived, they already put the fire out.
我到达时, 他们已经把火扑灭了. (不可用过去完成进行时)
8. Past simple or present perfect?
9. Several outcome measures were applied, and the results were compared with findings in previously described cohorts.
多用现在时和过去时态,偶尔也会用到完成时和将来时.一般用过去时叙述研究的实验设计、作过程和方法 、 到的结果等等.
10. The teacher said the assignment would have been handed in before next week.