I'm agreeing with you but [closed]

grammar

You could use it if you were interrupted by the other person while making a statement which broadly supported their expressed point of view but which, part way through, they thought was a disagreement.

For instance they might say

I don't believe that the Earth is flat

you might be about to reply

It looks flat but that's only because its diameter is so large

and they might interrupt after you've said "flat" by saying something like

That doesn't prove that it is, I say it's round

At that point you might say

I'm agreeing with you, but you didn't let me finish my sentence.

This is in contrast to

I think the Earth is flat

I agree with you.

In that case to say

I'm agreeing with you

would not be grammatically correct, although it does occur in some dialects, particularly South Asian ones.

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