Countable Nous & Uncountable Nouns

COUNTABLE NOUNS

Countable nouns are for things we can count using numbers. They have a singular and a plural form. The singular form can use the determiner "a" or "an". If you want to ask about the quantity of a countable noun, you ask "How many?" combined with the plural countable noun.

Examples:

• I have two dogs.
• Sandra has three cars.
• Jessie has ten dollars.

UNCOUNTABLE NOUNS

Uncountable nouns are for the things that we cannot count with numbers. They may be the names for abstract ideas or qualities or for physical objects that are too small or too amorphous to be counted (liquids, powders, gases, etc.). Uncountable nouns are used with a singular verb. They usually do not have a plural form.

Examples:

• Mack drinks a lot of water.
• Cindy gives great advice.
• Paul enjoys politics. Ends with "s" but uncountable

Sources:
http://www.edufind.com/english-grammar/countable-and-uncountable-nouns/
http://www.englishpage.com/minitutorials/countable-uncountable-nouns.htm