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So don't worry so much about how to use  had had  as a unit of grammar, they will come together naturally when you want to express the verb ' to have ' in the past perfect. Let's consider a different verb for a moment like  to want .
Been Had. Lifelike idiom. We are often had by other. Not so long ago when swine flu outbroke in my country the garlic (known as the leading treat against flu) had been steeply increased in price (5 times) and the ordinary people had to pay such a high price.