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2 The pronoun ne  is invariable, and can thus replace any noun, whether masculine, feminine, singular or plural: 

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3 As we have seen, ne  is used when referring to partial quantities, however expressed. Some expressions which require the use of ne  are the adverb abbastanza  (enough/quite), the adjectives molto , poco , troppo , alcuni / alcune (some/any (plural) ), and the pronoun qualcuno / qualcuna  (some/any), which is always singular : 

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4 Ne  is also used in negative expressions such as non . . . a ff atto  (not . . . at all), non . . . nessuno / nessuna  (not . . . anyone), non . . . più  (not . . . any more): 

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