do的过去式是什么

do的过去式是did，是用于一般过去时的助动词，过去分词为done。它的意思是做；干；学习；研究。

例句：

1、He did not belong to his set of friends.他与他那伙朋友不一样。

2、The journalist did not want to reveal the identity of his informant.那个新闻工作者不想透露消息提供人的身分。

3、What he did went beyond the bounds of law.他的所作所为已超出了法律允许的范围。