时态考点归纳与分析

过去完成时是一种相对时态，即以某一过去时间作参照，过去完成时表示的动作发生在这一过去时间的更过去，所以我们可以简单地用“过去的过去”这五个字来理解过去完成时态。如：

1. He _________more than 5,000 English words when he entered the university at the age of 15. (北京卷)

A. has learned               B. would have learned   C. learned               D. had learned

【分析】答案选 D。因为上大学是过去，学了五千个英语单词是在上大学之前，即“过去的过去”，所以用过去完成时。

2. When the old man _________ to walk back to his house, the sun _________ itself behind the mountain. (湖北卷)

A. started; had already hidden                        B. had started; had already hidden

C. had started; was hiding                             D. was starting; hid

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