A count noun is a noun that can be counted with a number. For example, kitten is a count noun because u can count how many kittens there r in a group. In general, people, animals, discrete objects, and units of measurements are all count nouns.

Mass nouns r nouns that can't be counted numerically, but can only be measured as an amount. For example, water is a mass noun because u cannot count how much water u have; u can only measure it. You would say, I have two liters of water, not, I have two waters.

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A Noun can be countable or uncountable. Countable nouns can be "counted", they have a singular and plural form . For example: A book, two books, three books. An apple, two apples, three apples.

Mass noun, uncountable noun, or non-count noun is a noun with the syntactic property that any quantity of it is treated as an undifferentiated unit, rather than as something with discrete subsets.

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