There are mainly two common rules of countable and uncountable nouns. The first one is countable nouns have a plural or a singular form, whereas uncountable nouns do not have a plural form. Countable nouns have singular form and take a/an before them whereas uncountable nouns do not take a/an.
For example...
Kate: Could you buy me two bananas and an apple? ('banana' and 'apple' are countable nouns. They have singular and plural forms)
Bob: Alright. Do you want some juice, as well? ('Juice' is an uncountable noun. It does not have a plural form.)
Kate: No, thanks. There is some orange juice in the fridge. There are also two bottles of cherry juice. (Countable nouns have a plural or a singular form so they can be followed by singular verb forms or plural verb forms, on the other hand, uncountable nouns are followed only by singular verb forms.)
Books are on your desk. ('Book' is a countable noun, so it can be plural.)
Information is on the sign. ('Information' is only followed by singular form verbs.)
A red pencil is on the floor. Two blue pencils are in my bag. ('Pencil' is a countable noun, so it can be singular and followed by a singular form verb.)
In my town, there is a building for homeless people. ('Building' is a countable noun, so it takes a before it.)
There is love is in my heart for her. ('Love' is an uncountable noun, so it can not take 'a' before.)
 Class or category names are uncountable nouns; however, the things in the category can be countable. 'Money' is uncountable but 'dollars', 'euros' or 'dimes' are plural forms. 'Fruit' is uncountable but 'apples', 'grapes' or 'strawberries' are plurals. |
