现在分词作结果状语与现在分词作让步状语时用不用现在分词的完成时，举个例子

Question

如题所述

Answer 1

都可以，看情况而定。
如：He went away again,leaving his son alone.现在分词做结果状语
Havn't received his letter,I wrote to him again.因为收信的动作在再次写信这个动作之前，即非谓语相对谓语动作已发生，所以用现在分词的完成时。表原因状语。