The artist was born poor,____ poor he remained all his life.答案是an_英语解答

The artist was born poor,____ poor he remained all his life.
答案是and,为什么不能填so?
请从语法角度分析

人气：145 ℃　时间：2020-01-26 08:48:14

解答

这里前后两个句子之间是递进关系,而不是因果关系.连词and正是起到这种语法作用.
生下来穷,与一生穷没有什么联系
这是常识.