has become a problem 与 has became a problem 的区别~
问题描述:
has become a problem 与 has became a problem 的区别~
答
前者正确.has/have+动词的过去分词是现在完成时结构,become的过去分词还是become.
has become a problem 与 has became a problem 的区别~
前者正确.has/have+动词的过去分词是现在完成时结构,become的过去分词还是become.