They are reported to have discovered another oil field in this area.They are reported 不理解为什么用They are reported ,什么语法呢?被动语态解释不通啊.另外they指人吗?书上的解释是常见句型：主语+过去分词+不定式，有这个句型吗？
问题描述：
They are reported to have discovered another oil field in this area.They are reported
不理解为什么用They are reported ,什么语法呢?被动语态解释不通啊.另外they指人吗?
书上的解释是常见句型：主语+过去分词+不定式，有这个句型吗？
答