Countable and Uncountable Nouns

 A noun can be countable or uncountable. Countable

 nouns can be "counted", they have a singular and 

 plural form .

example :

 Countable Nouns 

a book , two books 

  

an apple , two apples

 

a cat , two cats

 

 Uncountable Nouns 

water

rice

sand