Double-click on any word and see its definition from Cambridge Dictionaries Online.

Practise with a grammar game

Briefly, the difference countable and uncountable nouns can be explained as follows:

Countable nouns are things we can count, and have both singular and plural forms:

A boy; two boys; a car; two cars

You can use a/an before countable nouns.

Uncountable nouns are things that we cannot count. They do not have a plural form:

Air, sand, ice, wisdom (NOT airs, sands, ices, wisdoms).

You cannot use a/an before an uncountable noun. Instead, you can use a measurement and the word of:

			A breath of air
			A grain of sand
			A block of ice
			A lot of wisdom

Uncountable nouns are followed by the singular form of the verb:

			The air is clean.
			The sand feels hot.
			This coffee tastes horrible.

For more information about countable and uncountable nouns, see:

http://www.bio-text.com/ESL2.html

http://www.edufind.com/english/grammar/NOUNS3.cfm

For quizzes and games about countable and uncountable nouns, see:

http://www.aitech.ac.jp/~iteslj/quizzes/ck/sw-noncount01.html

http://www.aitech.ac.jp/~iteslj/quizzes/ck/sw-noncount02.html

http://www.manythings.org/wf/2/non-count.html