医生问他吃了什么。过去完成时的构成。
“直到……结束”，常用于过去完成时。
现在完成时和过去完成时都属于完成时态。
The present and past perfect tenses both belong to the perfect tense.
(过去完成时)他们说生产成本已经下降了。
它们是用作现在完成时和过去完成时的助动词。
They are used as auxiliaries to the present and past perfect tenses.
大部分的语法都只是一般过去时和过去完成时。
“已是”用过去完成时，深夜在发现山洞之前。
为什么我们用过去完成时，来表示过去的事情？
Why do we use "had been warned" to describe an event happened in the past?
Andrew一喝完咖啡就走了。(过去完成时)。
当我到达那里时，工作已经做完了。（过去完成时）
他们只等了一会儿车就来了。看着过去完成时练习。
They had only been waiting for the bus several moments when it came.
等，用过去完成时表示一种未实现的愿望和想法。如。
We had hoped that you would come to our English party, but you didn't.
我以为您的秘书把它们寄了。对不起。(过去完成时)。
I thought they had been posted by your secretary. I 'm sorry.
她在考试之前一直患重感冒。看看初中英语过去完成时。
She had been suffering from a bad cold when she took the exam.
这是她那一年第三次失业了。过去完成时的用法总结如下表。
It was the third time that she had been out of work that year.
(他吃完午饭后要了一杯水。)WHEN后面接过去完成时。
火车开出之前，我们就仍然到了车站。初中英语过去完成时。
过去完成时的被动语态。我们到电影院的时候，所有的电影票都卖完了。
All the film tickets have been sold out when I got to the cinema.
当时天已亮了，于是他撒下了第四网，也是最后一网。(过去完成时)。
Day had now broken, and he cast his net for the fourth and last time.
我找到第一份工作时还没有毕业呢。过去完成时的用法，脱口而出绝对高级！
过去完成时had +been + V (p. p)到上个月为止，他们已经把这本书翻译成了英语。
The book had been translated into English by the end of last month.
过去完成时had +been + V (p. p)到上个月为止，他们已经把这本书翻译成了英语。
The book had been translated into English by the end of last month.
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