be concerned for关心…；为…担忧
He should be concerned for the welfare of the workers.
他应当关心工人的福利.
be concerned with 与…有关系(或有牵连)；参与
be concerned in 与…有关系(或有牵连)；参与
be concerned about 关心,担忧,挂念
Don't be concerned about adult children any more.
不要再将成年子女当成未成年来监护
be concerned over 为某事忧虑,担心,担忧,关心,挂念.
与be concerned about意思相同.
这些短语后面都是接名词或代词啊!