having been shown 和being shown的区别having ben shown是分词做状语的完成时那 being shown 有事什么时态 哪些时候是要用到being shown的
问题描述:
having been shown 和being shown的区别
having ben shown是分词做状语的完成时那 being shown 有事什么时态 哪些时候是要用到being shown的
答
having been shown,持续展览了好一段时间了..(强调持续)
being shown 强调正在被展出.