Simoneregard…as用法
的有关信息介绍如下：
选 A regarded 这是过去分词做状语表示被动和已经.所以不用B.having been regarded 因为这是现在分词完成时态的被动式.表示某一动作已完成或持续了多久.常有一个时间状语在分词后.下面给你两个例子你会明白. Given more time ,we could do it better.=If we were given more time ,we could it better. Having been taught several times ,he still couldn't answer the question.= Although he had been taught several times ,he still couldn't answer the question.
