be concerned about 和 concern about 什么区别?
He is concerned about this problem.
He concerns about this problem.
人气：380 ℃ 时间：2020-03-27 06:44:01
解答
He is concerned about this problem.is concerned about 关心
He concerns about this problem 文法错了.
This proposal concerns us.这个建议与我们有关.
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