大学英语：concern n. 关心;关系;关联 v.涉及，有关于;使关心，使挂念

　　1) This matter is no concern of yours. (这件事跟你毫无关系。)

　　2) I don't think it is my concern， go and ask the manager， please. (这事跟我没关系，请去问经理。)

　　3) We felt concern for (或over) your health. (我们为你的健康担心。)

　　4) He is said to have been concerned in the crime. (据说他与这起犯罪事件有关。)

　　5) The energy problem concerns us all. (能源问题关系到我们每个人。)

　　6) The baby's poor health concerned his parents. (孩子身体不好使父母担忧。)

　　concern oneself in sth…… 关心

　　concern oneself with (about， over， in) 忙于

　　concern oneself about (for) 担忧

　　have no concern with 与…无关

　　to whom it may concern (用作正式信件的开头)敬启者

　　concerned adj. 担忧的，不安的;有关联的;关心的

　　1) We are concerned about (at， over) world peace. (我们关心世界和平。)

　　2) He spoke to the people concerned. (他对有关的人讲了话。)

　　3) We are not concerned with who is right or wrong. (我们对谁是谁非不感兴趣。)

　　4) As far as ability is concerned， he is the best candidate. (就能力而言，他是最佳人选。)