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via https://www.kidsworldfun.com/learn-english/countable-and-uncountable-nouns.php
Countable Nouns
As their name suggests, countable nouns are those that refer to something that can be
counted. For example, we can count cars:
one car, two cars, three cars…
Even if the number might be extraordinarily high (like counting all the stars in the sky),
countable nouns can be individually counted.
Some more examples of countable nouns:
car, man, bottle, house, key, idea, accident
dog, cat, animal, man, person
cup, plate, fork
table, chair, suitcase, bag, etc.
New cars are very expensive.
I got some books from the library yesterday.
Collective nouns (words that denote a group of people or things) are countable.
She attended three classes last week.
