do和did的区别如下：
助动词do does did，do 是原形，用于一般现在时态中的第一二人称和第三人称的复数;does 是 do 的第三人称单数形式，用于一般现在时态的第三人称单数 ;did 是 do 的过去式，用于一般过去时态的任何人称。
双语例句：
1、She did not believe in his professions of love.
她不相信他的爱情表白是真的。
2、He did that to gratify his girlfriend's vanity.
他做那事是要满足他女友的虚荣心。
3、The kitchen's always so messy after we've had guests. Give me a hand to do it over,will you.
家里来了客人之后，厨房总是那么乱，请你帮助我们清扫一下好吗？
4、Never link the audio out to the vcr and the monitor by connect them to each other as you will do at。
千万不可以像许多人在家里做的那样将音频连接到VCR和监视器上。
5、No crops were planted. Except in north-west Europe and the far northland it was all Man could do to.
没有种植任何庄稼。除欧洲西北部和再靠北方的地区外，人类要想在那里生存是不容易的。
6、The boss wants me to do Joe's work as well as my own. Doesn't he know I've only got one pair of.
老板既要我完成自己的本份工作又要做乔的工作。他难道不知道我手头很忙？