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beconcernedabout和concernabout什么区别?Heisconcernedaboutthisproblem.Heconcernsaboutthisproblem.
题目内容：
be concerned about 和 concern about 什么区别?
He is concerned about this problem.
He concerns about this problem.优质解答
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.
He is concerned about this problem.
He concerns about this problem.
优质解答
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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