I have been struggling with a sentence the smartest woman I know has used. When I asked her about it because I was confused, her answer was to "check it out". I have. I'm still confused. The sentence is "You, on the other hand, have had much value in my life".
I'm confused about the "have had" part. While she says she doesn't believe it means past and finished but it also has a meaning of continuance. She believes its called a "perfect indicative".
I am not a grammarian. I have spent hours trying to understand a "perfect indicative" both on the Web and the Library.
To me, "have had" only means past and finished.
Can anyone help me understand this "perfect indicative" if it is is one? And how can "have had" also have a meaning of continuance?

Thank you for any help you might be willing to give.
"You, on the other hand, have had much value in my life".

Actually, it is not a very good sentence as far as expressing anything clearly. The verb form, 'have had' is the present perfect tense (indicative mood, active voice-- but you don't need these terms at the moment).

PRESENT perfect indicates some process or condition which began at some (often unspecified) time in the past, and continues at the moment, and has the potential for continuing into the future:

'I have lived in Yokohama for 15 years.'-- I came 15 years ago, I live here now, I will likely continue to live here at least until tomorrow.

'I have never eaten frog's legs.'-- I didn't eat them in the unspecified past, I am not eating them now, and I may or may not eat them at the next restaurant I go to.

In the case of your sentence, 'You' began being of value at some unspecified time in the past, have continued to be of value from then until now, are of value at the moment, and may or may not be of value in ten minutes' time.

That is the nature of the present perfect tense. On the other hand, 'past and finished' calls for the past tense-- 'I had a sandwich (but now I don't)'-- or the past perfect tense-- 'I had already had my sandwich when my beer arrived.'

This is just the briefest of looks at verb tense-- I hope it is enough to serve your purpose. California Jim may have more to tell you when he comes aboard.
Mr. M.

I always think your answers are OK! I do have a tiny objection to point out, however:

You used "past perfect" when you meant "present perfect" at one point!

Emotion: smile (Oops, I mean "Cheers!")
Teachers: We supply a list of EFL job vacancies
Dear Mr. Micawber,
Thank you for answering my question. It helped a lot. I was waiting to see if California Jim might respond as you mentioned in your post. He didn't, so I am taking this time now to thank you for your help. It did help in clearing things up and now I can use my sentence as it was meant to be used. Again, thank you.
He must have thought my answer was OK, then. I hope you find answers to more of your questions here at English Forums in the future, Pdx.
Students: Are you brave enough to let our tutors analyse your pronunciation?
 CalifJim's reply was promoted to an answer.
Yes, I did-- and have just repaired it. Thanks, Jim.