-----Have all the students known that our class will visit the factory this afternoon?

问题描述:

-----Have all the students known that our class will visit the factory this afternoon?
-----yes,every student ______told about it.
老师说要填“has”,想知道这个空为什么要填“has”,为什么不能填“was”

has 表示现在完成时,就是每一个学生已经被告知了;而was没有"已经"的意思

谢谢,望采纳可是被告知了要用被动语态,BE动词+过去分词啊。为什么没有体现出来???应该填 has been 绝对没错的,非常基本的现在完成时用法 已经被告知了