be concerned about这个是形容词吗?

be concerned about这个是形容词吗? be concerned about的concerned是形容词吗?还是被动 be concerned about造句 关于be concerned about 英语翻译是这个,To be sure ,parents have always been concerned about be concerned about concern about be concerned about 中的concerned是什么词性? 请问be concerned about 是担心的意思,如 i am concerned about his healt concern about 和be concerned about意思相同吗 英语翻译用(be concerned about) 用户be concerned about 造句 类似be concerned about的