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Countable and uncountable nouns

What is the difference?

  • Countable nouns have singular and plural forms:

glass, glasses; part, parts; person, people

  • Uncountable nouns only have singular forms:

water, flour, petrol

  • To indicate their quantity/amount, capacity or weight, you must use them with a countable unit measure: two litres of water, six bags of flour, one barrel of petrol
  • A dictionary will tell you if a noun is countable or uncountable.

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