Is it correct to use "had have" in a sentence?
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Comments  (Page 5) 
AnonymousNo you can't say "if I had have applied", you can only say "if I had applied", the extra "have" in this case is not needed, as the tense auxiliary for the verb is "had"
True, but many native speakers of BrE do say that.
Not entirely correct. The "had have" the questioner is concerned about is the construction in a sentence "if I had known" and "if I had eaten my lunch, I wouldn't be hungry - but you cannot say "if I had HAVE known". There is simply no use for the extra have because the conatruction for this tense is just "have (past participle)

"Have had" is a completely different construction to "had (past participle) because it is a different tense and talking about events that have happened in the very near past, whereas "have (past participle) is talking about an event that happened BEFORE an event you are talking about in the past, for example "I had eaten before I arrived", so you wouldn't say "I had have eaten, I would have..."
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Fair enough, a lot of people do say it.
But is it correct, that is the question! It's interesting how language changes
Yep, technically that works in a sentence so would be right, BUT! The "had have" in your example is only correct because the "had" at the end of the noun phrase "all the friends I had" and is effectively just extra information to the noun "friends", which would then be followed by "have deserted me", and could be replaced with "they have deserted me", or "all my friends have deserted me". The "had" and the "have" only come together here to make "had have" because you decided to include that extra information about your friends about the friends that you had.
However, I think the questioner is referring to the usage in the construction "if I had have (done something", which is grammatically incorrect
How should one write this:

Any English language skills that I once had have evaporated away.

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Any English language skills that I once [at one time in the past] had had evaporated away.

No "had have" here; there should be "had had" [the first "had" is the grammatical one (a operator/an auxiliary verb); the second "had" is the lexical one (or a "full verb"). Instead of "had had" you can simply use "had", a full verb, here.