this was done是什么时态
this was done是一般过去时,done这个过去分词在这里用做形容词,表示一个事情完成了”这样一个状态；
done
adj.完毕;了结;结束;煮熟;熟了;合乎礼仪;
int.(接受提议)行，好；
v.做，干，办(某事);(以某种方式)做;行动;表现;(问询或谈论时用)进展，进行；
do的过去分词
This was done to provide necessary system resources for processing.
此方法用来提供完成处理所需的必要系统资源。
This was done one Wednesday on a lunch break from work.
那是一个周三，工作日的午后休息时间。
We know how this was done?
知道那家伙怎么动的手脚？
This was done by application of a combination Fuzzy Decision Making and Fuzzy Classification Analysis.
这是通过应用模糊决策和模糊聚类分析相结合来完成的。
When this was done, the next task was to get me on it.
马车造好后，接下来的工作就是把我弄上马车。