摘要：When we got to the station, the train had left.Before I went to university, I had studied in this school.By the time I got up, my
很多同学一直不清楚过去完成时态和一般过去时态的区别。实际上，只要把握两个方面，过去完成时态就很容易判断。
一，有从句的时候，如果主句和从句的谓语动词都是过去范围时态的，先后顺序较明显，那么，先发生的那个，就用过去完成时态。
When we got to the station, the train had left.Before I went to university, I had studied in this school.By the time I got up, my father had gone to work.Did you catch what he had said ?你刚才听懂了他所说的话了吗？What he had done made his parents very angry.他的所作所为使他父母非常生气。二，在某些词组，或者一些结构中，只能用过去完成时态。
By the end of last term, we had learned five units.By 2020, we had finished half of the work.Hardly had I arrived home when it began to rain. 我刚回到家，天就开始下雨了。No sooner had I finished homework than the telephone rang. 我刚刚写完作业，电话就响了。Forty years had passed before he realised that prevention is better than cure, especially when it comes to your teeth. 过了四十年，他才意识到，预防牙齿问题比治疗更重要。来源：飞扬教育
