A noun is a word that is used to denote a person, thing, place, abstract concept, etc., which is concrete or abstract. In English, nouns are usually used to denote sentence components such as subject, object, predicate, etc., and can also be used to form plural forms, possessives, special forms, etc. Learning the basics of nouns can help you better understand and use English grammar.
Here are some basic things to know about nouns:
1.Classification of nouns:
Specific nouns: Indicates people, animals, objects, etc., which can be perceived, such as cat, book, etc.
Abstract nouns: Concepts, states, qualities, etc., that cannot be concretely perceived, such as love, happiness, etc.
Countable nouns: Indicates nouns that can be divided into singular and plural forms, such as book - books (book).
Uncountable nouns: Expressions that cannot be divided into singular and plural forms, such as water and money.
2.Singular and plural forms of nouns:
Most nouns are formed in the plural form by adding -s or -es after the singular form, such as book - books (book), bus (bus) - buses (bus).
Some nouns have irregular plural forms, such as man (man) - men (man), child (child) - children (children).
3.Possessive of noun:
In general, the possessive case of a noun can be obtained by adding -apostrophe(() to the noun') and -s, e.g. john'S Book (John's book).
If the noun is in the plural form ending in -s, simply add -apostrophe(') for possessive, as in the students'books (students' books).
4.Special forms of nouns:
Some nouns have special variations in the plural, such as man (man) - men (man), woman (woman) - women (woman), etc.
Some nouns remain morphologically unchanged in both singular and plural forms, such as sheep, deer, etc.
5.Uses of nouns:
Nouns can be used as the subject, object, predicate of a sentence, etc.
Nouns can be used with articles (e.g., a, an, the), adjectives, and qualifiers (e.g., some, any, many), etc.
The above are the basic knowledge points about nouns, I hope it will be helpful for your learning.