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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 and take are both commonly used with nouns as their objects to indicate that someone performs an action or takes part in an activity. With some nouns, you can use either have or take with the same meaning. For example, you can say 'Have a look at this' or 'Take a look at this'.