concerned 与 concerning

问题描述:

concerned 与 concerning
concerned about his health he went to the doctor for advice 为什么不是concerning?

be concerned about是固定搭配,你这里写的concerned about…应该是省略了主语和系动词的形式.而concerning是动词的现在分词,并不能和about搭配使用,因此只能用concerned.