解释这句话的后半句为什么是对的

来源：百度知道 编辑：UC知道 时间：2024/06/01 02:00:18
It is hard for some young people to believe that women were at one time not admitted to some colleges, but they have since become coeducational.
可是我觉得那个they 就挺奇怪的啊.
难道不可以说,它就是代表前面的women么?
读起来怪怪的.

since有两个词性，我们通常接触的是它的连词词性，例如：Where have you been since I last saw you?后面加从句。

该句中是它的第二个词性，是副词，通常与现在完成时态与过去完成时态连用，意思是“从过去某时间以来，以后或到现在”，例如：He left home two weeks ago and we haven't heard from him since.

也就是说原句中since可以放句尾...they have become coeducational since更好理解。

它是代替前面的colleges, 意思是“以前一些学校不招收女性学生，但后来却变成了男女混合的学校，这使得现在的一些青年人迷惑不解”

since是因此的意思