I do not agree.

愚以为不然。

《新英汉大辞典》

I do not agree., nor does he.

我不同意，他也不同意。

youdao

I do not agree with this approach.

我并不赞成这种方法。

youdao

I do not agree with either idea.

VOA: special.2009.10.11

I agree, meditation is not something that you just do for an hour a day or a month or however much time you do it, it's supposed to be a practice you implement into your daily life.

我也认为冥想不是坚持一天或一个月,就能达到的,不管花多少时间在上面，这都只是种练习,要融入到日常生活中去。

普林斯顿公开课 - 人性课程节选

.. I guess, unfortunately, it is for... there needs to be a number put somewhere, like, I'm not sure what that number would be, but I do agree that there could possibly be a number put on the human life.

我觉得，不幸的是。,有时确实需要标价，不过我不确定具体数字，但我确实认同,人的生命也许可以被标价。

耶鲁公开课 - 公正课程节选

But that doesn't mean the entire game is corrupt, I do not agree at all.

WSJ: Scandal Hits Indian Cricket

As a proponent of laissez-faire economics I do not agree with the regulations in Wickard.

FORBES: The Economics of the Mandate Don't Matter: It's Constitutional

Um, I do not agree with the way he handled it for the following reason.

FORBES: Herman Cain's New Excruciating Oops Moment