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.
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,