What are countable nouns?
Countable nouns are individual objects, people, places, etc. which can be counted.
books, Italians, pictures, stations, men, etc.
A countable noun can be both singular – a friend, a house, etc. – or plural – a few apples, lots of trees, etc.
Use the singular form of the verb with a singular countable noun:
There is a book on the table.
That student is excellent!
Use the plural form of the verb with a countable noun in the plural:
There are some students in the classroom.
Those houses are very big, aren’t they?
What are uncountable nouns?
Uncountable nouns are materials, concepts, information, etc. which are not individual objects and can not be counted.
information, water, understanding, wood, cheese, etc.
Uncountable nouns are always singular. Use the singular form of the verb with uncountable nouns:
There is some water in that pitcher.
That is the equipment we use for the project.
Adjectives with Countable and Uncountable Nouns.
Use a/an with countable nouns preceded by an adjective(s):
Tom is a very intelligent young man.
I have a beautiful grey cat.
Do not use a/an with uncountable nouns preceded by an adjective(s):
That is very useful information.
There is some cold beer in the fridge.
Some uncountable nouns in English are countable in other languages. This can be confusing! Here is a list of some of the most common, easy to confuse uncountable nouns.