concern用法如下：
作为名词，该词的固定搭配主要有：
（1）with concern 关切地
（2）show/express concern about/for 对??表示担心/关心
我们来看下面的两个例句来体会以上固定搭配的用法。
She is looking at me with concern.
她正关切地看着我。
I showed great concern about his safety.
我对他的安全非常关心
同学们，还可用作动词，它的意思为“（使）担忧；涉及；关系到”，而且是及物动词
让我们看以下例句来体会以下它的意义和用法。
His illness concerns his wife.
他的病使他的妻子很担心。
The story concerns one of my friends.
故事讲的是我其中一位朋友。
It concerns the interests of people.
它关系到人民的利益。
特别注意A
concerned 不仅仅是concern的过去式与过去分词，还可用作形容词，它的意思为：
concerned作形容词的固定搭配：
（1）be concerned with 与...有关；涉及
（2）be concerned about 关心；挂念
（3）as far as sb be concerned 就...而言
请同学们看下面例句来体会以上固定搭配的用法。
She is concerned about her son's future.
=She concerns herself about her son's future.
As far as I'm concerned，educators should be concerned about the problems that are concerned with the healthy growth of the children and concern themselves with/in the work of education.
在我看来，教育者应关心和儿童健康成长有关的问题，并使自己参与教育工作。
特别注意B
concerned作形容词，作定语时候的位置不同，意义也不相同。
例如：a concerned look 担忧的表情；the people concerned相关人员