interested, concern, concern, concern意思有什么区别？

concerned，concerning这两个词的词义并不相同，用法亦有异，concerned，concerning这两个词的词义并不相同，用法亦有异。

扩展阅读：free his arm ... once upon a time ... make up one s mind ... have interest in ... interested in doing sth ... invalid suffix n on ... take an interest in ... be interested in ... show interest in ...