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1)用于wish后的宾语从句中，表示对过去未做成的事情的某种感叹或愿望。如：
I wish I had been there at that time.
那时候我要在那儿就好了。（事实上我不在那儿。）
I wish I had told him about it.
我要是告诉他那事就好了。（事实上我没告诉他。）
2)用于对过去事实进行虚拟的条件句中。如：
If I had hurried, I wouldn't have missed the train.
如果我快点的话，我就不会误了火车。
If you had been at the party, you would have met him.
如果你去了晚会，你就会见到他的。
3)过去完成时常用在引述动词一般过去时后的间接引语中。
They said that they had planted the trees on the hillside.
他们说他们把树种在山坡上了。
Jack told me he had read the book before.
杰克告诉我他以前读过那本书。
Julie said she had gone to see him the day before.
朱莉说她前一天已经去看过他。
4) think，want，hope，plan，intend，mean和suppose等词的过去完成时可以用来表示本来要做而没做或无法做的事，或没有实现的希望或意图。
Eve had hoped to see more of China.
伊芙曾希望在中国多观光一番。
I had intended to be there on time.
我本打算准时去的。
Greta had meant to see her off at the airport.
格瑞塔本打算是要去机场送她的。
