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The document discusses countable and uncountable nouns in English. Countable nouns refer to things that can be counted, like dogs, cats, bottles, and chairs. We can make countable nouns plural and use indefinite articles like "a" and "an" with them. Uncountable nouns refer to substances or abstract concepts that cannot be divided into separate elements, like milk, sugar, water, music, and news. We cannot make uncountable nouns plural or use indefinite articles with them.Read less