concerned，concerning這兩個詞的詞義並不相同，用法亦有異。 Concerned是分詞形容詞，其意為“有關的”（involved）； concerning是由分詞轉換而成的介詞，其意為“關於”（relating to）。請看下面的例句： 　　This agreement will be signed by the parties concerned．此協議將由各有關方面簽署。 　　They called on all departments concerned to take prompt steps to promote the development of light industry．　　他們要求各有關部門迅速採取措施，促進輕工業發展。 由例句可見，concerned用作形容詞解作“有關的”時，是後置定語，大都放在它所修飾的名詞之後。但在動詞“to be”之後而同樣解作“關於”時，則要用be concerned with的形式，如： 　　This book is concerned with English usage．　　此書是與英語慣用法有關。 　　值得注意的是，concerned（亦可表示動詞之意）也可解作“關心”、“擔心”、“掛…唸的，擔…心”的解，與之搭配的介詞為at、about或，用作此意時，concerned也是形容詞。例： 　　He was deeply concerned at the news．　　聽到這個訊息時，他深為擔憂。 　　We are all concerned about the pollution of the environment here．　　對這裡的環境愛到汙染，我們都感到不安。 Parents are naturally concerned for their children"s safety．　　父母自然關心他們兒女的安全。 I am very concerned about her.我非常掛念她。 to concern oneself with public work關心公眾事務 We"re rather concerned about father"s health.我們相當擔心父親的健康。 We are all concerned for [about] her safety.我們大家都擔心著她的安全。 下面是concerning的例句： 　　This is a proposal concerning the construction of the new airport．　　這是關於興建新機場的一項建議。 　　Yesterday we wrote him a letter concerning the business arrangement．　　昨天我們就業務安排問題寫了一封信給他。 　　在個別場合下，concerned with可以和concerning互換使用，原因是從句which are concerned with中的which are 省略了。例如： 　　We had several disputes concerning/（which are）concerned with this matter．關於此事，我們曾爭論過數次。 　　請注意，下列語句的區別： 　　They were concerned（worried）about the matter．他們為此事而擔憂。 　　They were concerned（implicated）in the matter．他們參與此事。 　　They were concerned （connected）with the matter．他們與此事有關。 此外，作為特定片語，as far as I am concerned解作in my opinion； as far as sth is concerned解作concerning sth/ talking about sth.例： 　　As far as I"m concerned，this plan is impractical．依我來看，這個計劃不切實際。 As far as funding is concerned，some banks have agreed to provide loans．關於資金方面，一些銀行同意提供貸款。 詞形詞義拓展： unconcerned adj.漠然的， 漠不關心的;無關的，不相干的 = indifferent It is quite indifferent to me whether you go or stay.對你的去留我毫不關心。 I am indifferent to their arguments.我對他們的爭論毫不關心。