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?

问题描述:

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(为什么不能用concerned?) about his mother,he didnt go to school.在说worry 省略句一般都是worried about …… ,he…… 很少用worrying about…… ,he…… 为什么?

He is concerned about this problem.be concerned about 关心He concerns about this problem 语法错误,concern about 不可作为动词用,可以:He expressed concern about this problem.concern 作动词是及物动词:v...