I'm afraid I disagree.

恐怕我不同意。

I don't agree with you / that.

我不同意你的看法。

I'd be inclined to disagree.

我可能会不同意。

That's not the way I see it.

我不是这么认为的。

I don't think so. / I don't feel the same.

我不这么认为。

5. Partly agreeing:

表示部分同意:

I see your point but …

我明白你的意思，但是…

I kind of agree with you / that.

我同意你的看法。

I agree with you to an extent, however, …

在某种程度上我同意你的看法，然而…

You make a good point, but …

你提出了一个很好的观点，但是…