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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 .
have/has/had are 'action verbs' when they are followed by a noun, eg. i have a pen-is the action of having or owning a pen. when they are used in a sentence such as 'i have â¦ played football' they then become an auxiallary verb, in this case to the verb played. 7 people found this useful.