Countable nounsare words that can be counted; they can be singular or plural. Examples are:
Non-count (mass) nouns are things that can't be counted; they are words for substances, concepts, and some gerunds. Examples are:
Plural forms for substances are reserved for 'kinds of' or 'types of' such as 'a dish of two rices' means two types of rice used, basmatti and wild; a selection of teas, for example black tea, green tea, oolong, and jasmine.
Multiples of mass nouns are expressed as:
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If you are referring to countable nouns, those are nouns that have a plural. Book, girl, school, horse... these all can be counted. Five books. Twenty girls. Three schools. Two horses. But some nouns have no plural. They are called non-countable (or non-count) nouns. "Information" and "research" are two examples.
The word "all" is used with countable or uncountable nouns to refer to 100% of many things. For example: All of my furniture is from Ikea. (uncountable) I bought all of my plates from ABC department store. (countable) The words "whole" and "entire" mean 100% of one thing. It is used with countable nouns. For example: I ate the whole pie by myself. I'm so full right now. I spent the entire day watching TV and drinking beer. It was great!
Abstract nouns can be singular and plural, or uncountable.Examples of countable abstract nouns are:belief, beliefshope, hopesidea, ideasmemory, memoriessecret, secretsyear, yearsExamples of uncountable abstract nouns are:chemistryeducationharmknowledgesoccerweather
For a countable noun use fewer, for uncountable nouns use less.
few is countable