1. a and an are indefinite articles. Usage:
1. Generally speaking, a is used before a word starting with a consonant, and an is used before a word starting with a vowel. before the opening word.
2. Use ?a (or ?an) in front of countable nouns, and do not use a (or ?an) in front of uncountable nouns. For example, you can say ?a?healthy boy, but you cannot say ?a ?health.
3. In certain circumstances, a (or?an) can be used in front of the plural form: in idioms, there are a?few (books), a?great many (books) and other expression methods.
4.a (or?an) sometimes means "one instead of the desired one". a? also means "any one".
5.a? When used with few, few means "very few" and means "almost none". a?few means "a few" and means "quite a few". Note that only?a?few is equal to few, which also means "few".
2. The is the definite article. Usage:
1. Specifically refers to a person or thing that both parties understand, for example: Take the medicine. Take the medicine.
2. The person or thing mentioned above, for example: He bought a house. I've been to the house. He bought a house. I've been to that house.
3. Refers to two unique things in the world, such as: the sun, the sky, the moon, the earth.
4. Singular nouns are used together to express a type of thing, such as :: the dollar, the fox; or used with adjectives or participles to express a type of person: the rich; the living.
5. Used in the superlative form of ordinal numbers and adjectives, and in front of adjectives only, very, same, etc., for example: Where do you live? I live on the second floor. Where do you live? I live on the second floor. Second floor. That's the very thing?I've?been looking for.
6. Used with plural nouns to refer to the entire group, for example: They are the teachers of this school. Refers to all teachers). They are teachers of this school. (referring to some teachers)
7. Indicates all, equivalent to possessive pronouns, used before nouns indicating body parts, for example: She caught me by the arm.. She grabbed my arm.
8. Used before some proper nouns such as country names, institutions, groups, classes, etc. that are composed of common nouns, for example: the People's Republic of China? The People's Republic of China. the United States
9. Used before nouns indicating musical instruments, for example: She plays the piano. She can play the piano.
10. Used before a plural noun of a surname to indicate a family, for example: the Greens extended information on the Greens (or Mr. and Mrs. Greens)
1. Articles are divided into indefinite articles There are three types of words: "a, an", definite article "the" and zero article "(/)". Zero article refers to the case where no article is used.
2. The definite article (such as the in English) is used to limit the noun behind the article to a specific thing.
3. The indefinite article (such as a/an in English) is used to indicate that the noun following the article refers to one of a certain type of specific things.
IV. Definition of article:
Article (Article) is a kind of function word. It is generally not stressed in sentences. It cannot be used independently and can only be placed together with nouns. Help describe the person or thing the noun refers to.
Contains indefinite article (Indefinite Article), definite article (Definite Article), negative article (Negative article), partial article (Partitive article) and zero article (Zero Article, that is, no article) word).
In English, it is the smallest category of parts of speech, referred to as "art.", with only three: indefinite article, definite article and zero article. There are no articles in Chinese. There are two types of articles: indefinite pronoun (a/an) and definite article (the). In addition, there are some specific occasions where no article is used, which is commonly known as "zero article".
5. The origin of articles:
Articles originated and developed independently in different languages. Generally, older languages ??tend to omit articles.
Languages ??that do not omit articles develop articles by borrowing adjectives and their derivatives.