retrospective verbs

Use only the first one.

Google hits at the BBC site:
0 from bbc.co.uk for "regret telling you"
57 from bbc.co.uk for "regret to tell you"

Yesterday, I told you John stole it. This morning I found out I was wrong. It was Steve who had stolen it.

Now I regret telling you that John stole it. It was a mistake to do so.

Sounds perfect, GG

For the OP:

I regret to tell you: the regret is for something which i

Ok, I do in this case.
However my primary point in this post was finding out the semantic difference between TO-infinitive and -ING form.
I´ll try to outline my point in these sentences:
I remembered to fill out the form. - my guess is : I remembered and DID so.
whereas in
I remembered filling out the form. - I rembered that there is a custom, routine or habit of doing somethi

Marius HancuSounds perfect, GG

For the OP:

I regret to tell you:

I remembered filling out the form = As much as I remembered, I did fill out the form.

I forgot to fill out the form =/= I forgot filling out the form (which is unidiomatic).

I regret to tell you....= It's my regret to tell you ....which does not have the same meaning

Marius HancuUse only the first one.

Google hits at the BBC site:
0 from bbc.co.uk for "regret telling you"
57 from bbc.co.uk for "regret to tell you"

Hi Marius

Why did you find no hits in 'regret telling you", whereas Barbara reply is

Now I regret telling you that John stole it. It was a