Is it possible to use present perfect with "long ago"?

Hello, everyone:

I know that we don't use present perfect with the phrase like "2 years ago", "one minute ago", but can we use present perfect with "long ago"?

Thank you for answering my question!

Philip

Generally, no.  But you could say, "I have seen that film, but it was long ago".

Very smart, Philip. Now, however, long ago is not in the same clause as the perfect have seen. We could of course also say: I have seen that film, but it was two years ago.

As to the original question, language is not an exact science. It's not math. It is impossible  -  or at least a little stupid to say that something is never or always done or said. There is often the unexpected exception to most rules.

CB

Cool Breeze

or at least a little stupid to say that something is never or always done or said.

CJ 

I don’t want to add fuel to the already fired up discussion but I was taught as a rule of thumb, that “since” and “ago” usage should be avoided in a present perfect sentence.

I know there is another camp which sees it differently.

I have been living in California since 3 years ago –to some this is acceptable. I was taught this is non-standard.
Somehow, the word "ago" just doesn't seem to stick to present perfect tense to me.