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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 .
Both single (in the U.S.) and double (in Britain) quotations are sometimes used as scare quotes, that is, as a way of emphasizing a word or phrase to indicate the writer is using it somewhat ironically. American English: She excelled in using âproperâ English. British English: She excelled in using âproperâ English.