diamonds are very impressive as they are mined钻石刚开采时并不光彩照人.
问题描述：
diamonds are very impressive as they are mined钻石刚开采时并不光彩照人.
diamonds are very impressive as they are mined钻石刚开采时并不光彩照人.
英语有语法错误吗?as可以改成at吗?
答
没有语法错误,as不可以改成at,这里的as引导后面的时间状语从句,意思是“在什么时候”at不是也有“在什么时候”的意思吗但是at不能引导从句，只是个介词而已