1.挂虑的,担心的,不安的[(+about/for/over)]

She is concerned about your safety.

2.有关的;参与的[(+in)]

Everyone who was concerned in the affair regrets it very much.

3.关心的,感兴趣的[(+about/for)][+to-v][+that]

She's most concerned to solve this problem.

她很想解决这个问题。