Count nouns have two forms: singular and plural.
They can be used with numbers and quantifying expressions such as many, several, and few.
When used as subjects in present tense sentences, count nouns require the -s form of the verb in the singular and the base form of the verb in the plural.
|The dog sleeps.
|The dogs sleep.
|The bear has large claws.
Non-count nouns have only one form. When used as subjects in present tense sentences, non-count nouns require the –s form of the verb.
|Juice contains many vitamins.
|Honesty is the best policy.
Some nouns can be either count or non-count.
|Job experience is essential
|Some experiences can be funny.
|Milk contains calcium.
|Two milks, please. (informal)
Both count and non-count nouns can be quantified. That is, they can be used with expressions which divide them into parts or groups which can be counted. For example,
|Two bags of apples
|A box of cookies
|Two cartons of milk
|A cup of sugar
Sometimes a non-count noun is used to indicate a “group” of items, whereas individual items within the group are countable. For example,
|dollars, bills, fives, cents, dimes, coins
|years, months, days, hours, minutes
|dresses, pants, shirts, socks, shoes
|Tables, chairs, sofas, lamps
|suitcases, briefcases, bags, carry-ons