Countable nouns
These refer to things which can be counted.You use them with a/an or put a number in front of them. You usually form the plural by adding -s,-es,-ies.
a car - 500 cars; a church - 3 churches; a country - 12 countries.
Note: A few common countable nouns have irregular plural forms:
a child - two children
a foot - two feet
a man - two men
a woman - two women
a mouse - two mice
a person - two people
a tooth - two teeth
Uncountable nouns
These refer to things which cannot be counted. You cannot use a/an or put a number in front of them.
advice, food, furniture, information, love, music, work, rain, traffic, travel, weather, work.