Quantifiers + Single Countable Nouns
Examples of quantifiers used here with single countable nouns include a, an, each, either, every, neither, and one.
Quantifiers + Plural Countable Nouns
Quantifiers used with plural countable nouns are both, many, several, and two.
Few and a few
Few and a few come before plural countable nouns. Few (without a) conveys a negative meaning of only a small number or hardly any and not enough; a few has a positive meaning of having some but enough.
Quantity word + of: Countable Nouns
The quantity word + of are used when there are specific countable nouns or noun phrases. If they are general ones, the quantity word + of are not used. The quantity word + of terms used here are a couple of, a great number of, a large number of, a number of, either of, and most of.
The number of and a number of
The word number is singular. But when it is followed by of (number + of), it can be the number of or a number of. The difference between these two quantifier expressions is that the number of is followed by a singular verb while a number of is followed by a plural verb. The reason is the number of is not used to mean many; It is just a collective term of many, while a number of is used to mean many.
Cardinal number and Ordinal number
A cardinal number is used to show the quantity of people or things, and is used as a determiner.
An ordinal number is a number such as first, second, thirtieth, twenty-third, or 200th that shows the numerical position of someone or something in a list. An ordinal number is used as a determiner.