Usage of "have had together"

[Ppare]

when to use have had
can it be had have
please give examples

[Kitosdad]

I could have had a new car, if only I'd had enough for the deposit. ( IF clause.)

I have had enough of this situation, I'm leaving!
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[Sandy1]

No you can not say had have
It is the rule of present perfect :
Subject + have or has + verb 3 (past participle) + complement
for example: I have had my lunch
If you do not know when to use present perfect you can ask me.
sandy1