Countable nouns refer to people or things that can be counted by numbers and divided into individuals; So it has a plural form, and when its plural form is used as the subject in a sentence, the predicate of the sentence also uses the plural form.
Uncountable nouns refer to things that cannot be counted by numbers and can not be divided into individual concepts, states, qualities, feelings or substances. Generally, there is no plural form, only singular form, and the indefinite article a/an cannot be added before it.
To express its individual meaning, it is usually used with a noun phrase, which is equivalent to numeral+(quantifier)+noun in Chinese. The meaning of quantifier depends on the collocation with specific nouns. However, when uncountable nouns mean "one kind, one field, one time", "one time" and an emotion, and when uncountable nouns are used to refer to something or a product or work that causes this emotion, the indefinite article a/an can also be used directly in front. One-stop study abroad strategy in ing.com