I am not altogether convinced by this argument.

我不完全信服这一论据。

《牛津词典》

I am not sure whether this was courage or pigheadedness.

我不确定这是勇气还是顽固。

《柯林斯英汉双解大词典》

I am not prepared to let this matter rest.

我不准备停止谈论这件事。

《柯林斯英汉双解大词典》

"Aylmer," said Georgiana, "I do not know what the cost would be to both of us to remove this birthmark.

VOA: special.2009.09.26

So, at any rate, this seemed to me to be, when I started teaching this course, reasons not to teach it.

因此无论如何对我来说，当我开始教这门课的时候决定不说它的原因。

耶鲁公开课 - 现代诗歌课程节选

You can say "I do not want this around me.", "I do not want this person around me."

你可以说，“把这东西拿开”，“我不想看见那个人”。

I hate 课堂 - SpeakingMax英语口语达人

"I would not take this job if I did not have full responsibility for this company, " Clark said.

FORBES: Gilmartin Gets Out Of The Way

If I had not done this, I would never know what I did not know.

FORBES: To Continue Growing, Quit The Big Job

"I was definitely not expecting this at all - I was not sure how the whole comeback would pan out, " said Davenport.

BBC: Venus outclasses Davenport