You can say, "I have a question."
You can say, "I have had a question for a long time." Right?
But what about, "I have had had a question ..."? Optional side question: how do you punctuate the previous sentence? Is "have had had" grammatically correct? If so, what does it mean? Also, is it then correct to use "have had had had had had had," and does each use with a different number of hads mean something different? Do these tenses have a name? Would you only use these tenses in unique time travel scenarios?
"I have had had a question," sounds weird but not necessarily wrong. "Having had had a question, I asked it," sounds okay. Or something like "Having had been a person..."
So it seems that "Having" in "having had had" does not necessarily have anything to do with the tense? It still seems grammatically correct and not completely unusual to say "having had had" or even "having have had" for that matter.
Bob: I had had a question, but I never got a chance to ask it. Bill: Having had had a question that was never asked, I understand how you feel.
I also found a few (very few) examples of "having have" by googling. I don't know if they're grammatically correct, but here's some:
If these uses of "having have" are okay, then doesn't that mean that "having" at the beginning of such a sentence is different than "have" when used in the present perfect.
But sometimes, doesn't "Having" in similar-looking sentences have something to do with tense?