do的过去式是did。do可作名词、动词和助动词，含义为“做”、“进展”、“社交聚会”、“事件”、“诈骗”、“宴会”，可用于实义动词前构成否定句和疑问句；did作为do的过去式，含义为“行动”、“办”、“表现”。
一、do的中文含义及用法介绍
do可作动词、助动词以及名词，意为做;行动;表现;社交聚会;社交活动；事件;诈骗;宴会;必须做到的事情。用于实义动词前构成否定句和疑问句;构成附加疑问句;代替实义动词以避免重复。
例句：What are you doing this evening?
你今晚打算做什么？
They are free to do as they please.
他们想怎么做就怎么做。
She did well out of the deal.
她从这笔交易中赚了不少钱。
I'm doing some research on the subject.
我正就这一课题进行研究。
I like the way you've done your hair.
我喜欢你梳的发式。
I like listening to the radio when I'm doing the ironing.
我喜欢边熨衣服边听收音机。
What does she want to do when she leaves school?
她毕业后想干什么？
I'm doing physics, biology and chemistry.
我在学物理、生物和化学。
You live in New York, don't you?
你住在纽约，不是吗？
Are you having a big do for your birthday?
你打算举行大型生日宴会吗？
二、did的中文含义及用法介绍
did作为动词，意为(以某种方式)做;办(某事);行动;表现;(问询或谈论时用)进展;进行。
例句：I could do it now, if you like.
如果你愿意的话，我现在就可以做这事。
What in the world did they think they were doing?
他们到底认为自己在做什么？
Many people do not like the idea of experiments on animals.
许多人不赞成在动物身上做试验。
Right then, where do you want the table to go?
那好吧，你要把桌子放在哪里呢？
They think I can't do it, but I'll show them!
他们以为我做不了，我却要做给他们看看！
