I know I was stupid; you don't have to rub it in.

我知道我当时很愚蠢；你不必老提这件事。

《牛津词典》

I was stupid enough to believe him.

我可真够糊涂的，竟然相信他的话。

《牛津词典》

They already thought I was stupid.

他们已经觉得我很蠢了。

youdao

"Yes, I was very stupid.

VOA: special.2009.02.07

Here's my favorite example of stupid facts I was forced to learn when I was younger--state capitals, right?

下面是我最喜欢的一个关于愚蠢的事实的例子,在我年轻时，我被迫去记忆州首府？

耶鲁公开课 - 死亡课程节选

I was either at the right time too stupid or too intelligent to have it.

我现在既不是太明智也不是太愚昧因而不能有这种幻想。

耶鲁公开课 - 文学理论导论课程节选

While I was alone before my release, pacing back and forth, it was almost impossible not to suspect that I was stupid, that my actions were futile.

CNN: My arrest at Occupy Wall Street

He looked at me as though I was stupid.

BBC: Australia: Where the good life comes at a price

But I thought I was stupid.

NPR: Escaping Hunger: One Man's Story