be concerned about 和 concern about 什么区别?He is concerned about this problem.He concerns about this problem.

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beconcernedabout和concernabout什么区别?Heisconcernedaboutthisproblem.Heconcernsaboutthisproblem.beconcern

be concerned about 和 concern about 什么区别?He is concerned about this problem.He concerns about this problem.
be concerned about 和 concern about 什么区别?
He is concerned about this problem.
He concerns about this problem.

be concerned about 和 concern about 什么区别?He is concerned about this problem.He concerns about this problem.
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.