It is time that authorities concerned took proper steps to solve the traffic problems.上面一句话中的concern 为什么加ed啊,我不太明白.那这句话的后面为什么用took啊
问题描述：
It is time that authorities concerned took proper steps to solve the traffic problems.
上面一句话中的concern 为什么加ed啊,我不太明白.
那这句话的后面为什么用took啊
答
这里是分词做定语,修饰authorities.意思是：有关当局.因为是做定语,修饰成分,所以应该用分词形式.concerned表示“有关的” concerned只是修饰“authorities”的,对句子其它部分没有影响.至于took,这是一个固定用法：...