I had finished work at about 4 o'clock and then gone to the post office.

问题描述：

I had finished work at about 4 o'clock and then gone to the post office.
为什么过去完成时跟了时间点

答

因为前边的句子是The time was a quarter past five in the afternoon.And I was driving along the
road to fetch my daughter from her school.Our plan had been to go swimming
together.所以后面的句子用过去完成时表示是在 a quarter past five以前发生过的事 I可以跟时间点 at about 4 o’clock连用 i had finished work at about 4 o’clock and then gone to the post
office.那现在完成时为什么不能加时间点？因为本句 at about 4 o’clock=before a quarter past five in the afternoon所以本句可以用过去完成时如果没有前句完成时是不能和时间点连用的。前文：The time was a quarter past five in the afternoon. And I was driving along the road to fetch my daughter from her school. Our plan had been to go swimming together.第二句指当时发生的动作第三句是第二句动作发生之前的打算故用过去完成时表示过去的过去

I had finished work at about 4 o'clock and then gone to the post office.

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