does是do的单三形式，do的过去式是did，故does的过去式是did。

do的含义有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，进行等。”

相关介绍

The charity does a lot of good.

这家慈善机构做很多善事。

She went up in my estimation when I discovered how much charity work she does.

我发现她做了这么多慈善工作，我就比以前尊敬她了。

She doesn't work here, does she?

她不在此地工作，对吧？