has become a problem 与 has became a problem 的区别~
has become a problem 与 has became a problem 的区别~
英语人气:111 ℃时间:2020-04-09 13:31:54
优质解答
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.
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