我不知道我做了什么。

I didn't know what I was doing.

youdao

为了庆祝我不知道我做了什么。

For the celebration I didn't know what I was doing.

youdao

我不知道我做了什么应得这个第一的事。

I don't know what I've done to deserve it.

youdao

If you don't give me seven hours a week, I don't know what I can do for you.

如果你们一周不学习7个小时，我不知道我能为你们做什么了。

麻省理工公开课 - 固态化学导论课程节选

Also, I don't know. What have we done?

我不知道。我们都做了什么？

与朋友们的回忆 - SpeakingMax英语口语达人