我不知道我怎么了，呵呵！

I do not know how, and ha ha!

youdao

大卫：我不知道我怎么了。

David: I don't know what came over me.

youdao

我不知道我怎么了，这些天我总是做错事。

A: I don’t know what’s wrong with me. I can’t seem to do anything right these days.

youdao

The Elder Brother is issuing this theory without any consideration, - obviously, whatsoever of earthly reality and we're shocked by -- I don't know how else to put it.

大哥没有经过任何思考就提出了这个理论，显然，尘世间的任何事实都让我们震惊了-,我不知道怎么去说。

耶鲁公开课 - 弥尔顿课程节选

And you've asked several people on the street . "I just can't get there! I don't know where I'm going!" and

你在街边向几个行人问路。“我没法找到目的地了，我不知道该怎么走！”

How long课堂 - SpeakingMax英语口语达人

I don't know how you think of life insurance salespeople, but they have been pillars of the community.

我不知道你们怎么看待寿险推销员,但他们已然成为了社区的支柱

耶鲁公开课 - 金融市场课程节选