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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 .
as a transitive verb used in descriptions and for talking about possession, relationships, or the state that someone or something is in: She has dark curly hair.He had two sisters. This use of have is never in progressive or passive forms.