我以人格担保我根本不知道这件事。

I swear on my honour that I knew nothing about this.

《牛津词典》

我根本不知道我下周会在什么地方。

I can't say with any certainty where I'll be next week.

《牛津词典》

我根本不知道我到底有多少个书签。

I have no idea how many bookmarks I have at this point.

youdao

Actually, a minute ago I didn't even know what I was going to play but I remember that.

实际上,一分钟前,我根本不知道要弹什么,但是我能记住这段曲子

耶鲁公开课 - 聆听音乐课程节选

So why I didn't necessarily say to myself "These people are just wrong!", I discovered there were many things about other communities and cultures that I just didn't know.

我并没有对自己说,“这些人肯本就是错了！“,相反，我发现了许多,我原先根本不知道的,有关别的社区和文化背景的事情。

普林斯顿公开课 - 人性课程节选

My management doesn't ask me what I'm doing in here, all right? They don't know.

我的管理部门没有问我在课堂上做什么，他们根本不知道。

麻省理工公开课 - 固态化学导论课程节选