The correct form is "Has she bought..." (she has bought).
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they bought it
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I have bought is the present perfect of the verb to buy.
I might have bought. I could have bought.
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Bought , party
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No, the word "bought" is not an adverb.
the word "bought" is a verb ("I bought some new shoes"). Sometimes it can also be an adjective, particularly in the United States ("this pie is store-bought").