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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 .
English(ProperNoun) (collective plural) The people of England; Englishmen and Englishwomen. The Scottish and English have a history of conflict. english(Noun) Spinning or rotary motion given to a ball around the vertical axis, as in billiards or bowling. You can't hit it directly, but maybe if you give it some english.