since+具体时间,后所接句子用什么时态.翻译一下：明朝以来,人们开始注重一种整体的美感

since+具体时间，后所接句子通常用完成（现在完成或过去完成）时态。
Since Ming Dynasty, people have begun to focus on a holistic beauty

since后面应该接过去的某一时间点。如： since 8:00 yesterday morning. since 1990 since 5 years ago 这个时间点也可以用一个时间状语从句表示，从句的

只要出现（since 引导的时间状语从句,）主语用完成时态一定是对的.
Since Ming Dynasty,people have been paying attention to a total sense of beauty .

peple had been payind attention to overall aesthetic since Ming Dynasty