问题描述：
this story that his friend had just told.这句话为什么要有had?可以删去吗?
this story that his friend had just told.（这个故事,他的朋友刚刚讲过.）这句话为什么要有had?可以删去吗?
this story that his friend had just told.（这个故事,他的朋友刚刚讲过.）这句话为什么要有had?可以删去吗?
问题解答：
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