be concern about concern要不要加ed

be concern about be concern about concern要不要加ed be concern about be concern with be concern for 的用法有什么不同 be concerned about concern aboutbe concerned about 和 concern about 的区别! concern about 和be concerned about意思相同吗 be concerned about和concern about的区别 英语中concern 和 be concerned about 有什么区别? 英语中concern 和 be concerned about 有什么区别? 英语翻译concern about show concern about英译汉 concern的用法关心某事是不是sb be concerned with sth那么concern about 最好有例子, be concerned about 和 concern about 什么区别?He is concerned about this problem.He concerns about this problem. sb concern sth sb be concerned with sth sb be concerned about sb be of concern be of no concern concern 及物动词,使担忧,但为什么还有 be concerned about这里的concerned是形容词吗?但是concern并没有形容词词性,为什么后面还要加about? be concerned about ,concern about 不都有担心……的意思吗?为什么省略句中不能用concerned?be concerned about ,concern about 不都有担心……的意思吗?为什么省略句中不能用concerned?例 concerning（为什么不能 concern about与care about怎么区别?