The definite article the
(1) Usage of the indefinite article a / an:
(1) A / an
Example: She has a clever son.
⑵表示每个
例：We have 3 English classes a week.
⑶表示某
例：The book is ∕was written by a student.
⑷表示某類之一
例：I am a teacher ,he is a doctor.
(5) The first reference to a person or thing is indicated by the indefinite article, and the definite article is used when it is mentioned again.
Example: I have a bike,the bike is green. I have a bike,the bike is green.
(6) is used before the singular form of a countable noun to indicate the category.
Example: A teacher must love his student.
(7) is used in front of nouns that mean price, speed, rate, time, etc.
Example: 3 times a day. 3 times a day
10 yuan a meter. 10 yuan a meter
(8) is used in front of abstract nouns to indicate a kind of...
Example: a new culture a new culture. Culture A new culture
(9) is used in the sentence pattern: "a∕an +Mr.∕Mrs.∕Miss.∕Surname"
Example: a Mr. Wang A Mr. Wang (don't know)
Mr. Wang Mr. Wang (know)
(10) is used in some phrases to indicate a kind of...
(10) is used in some phrases to indicate a kind of culture. > ⑽用于某些短语中
例：a lot of 许多，大量
have a good time 玩的开心，过的愉快
（二 ）定冠词the的用法：
⑴表示特定的人或物物
例：The book on the desk is mine. The book on the desk is mine.
(2) It means that the listener and the speaker are familiar with each other
Example: Where is Tom?
He is in the room.
(3) The first mention of a person or thing is indicated by the indefinite article, and the definite article is used when it is mentioned again.
Example: I have a bike,the bike is green. I have a bike,the bike is green.
(4) To denote something unique in the world (except for proper nouns)
Example: The sun The sun
(5) To denote a country, a party, a group, an organization, etc., the definite article is used before the phrase
Example: The Communist Party
(6) To denote a musical instrument, the definite article is used before the phrase
(6) To denote a musical instrument, the definite article is used before the phrase
(6) Play the piano To play the piano, the piano is a musical instrument. Example：Play the piano Play the piano
(7) Used before the plural form of a surname to indicate a family
Example：The Wang's 王家
(8) Used before a singular countable noun and a nominalized adjective to indicate a category
Example：the old 老人
(9) Used (9) before ordinal numbers, adjective superlatives, and nouns indicating location (adverbs can be left out before superlatives)
Example: the fattest girl
in the east in the east
(10) before geographic nouns (rivers, lakes, and oceans...)
Example: The yellow river 黄河
(11) is used in front of a noun indicating a newspaper, a conference, a treaty, etc.
Example: The Times newspaper
(12) is used in front of certain buildings
Example: the National Gallery 国家美术馆
(13) is used in front of proper nouns consisting mainly of common nouns
. before proper nouns
Example: the People's Republic of China The People's Republic of China
(14) Used before the plural of a counting word that meets ten to indicate a specific era in the century or the approximate age of a person]
Example: in the 1960's ∕in the 1960s in the 1960s
a man in the thrities a man in his thirties
(15) used in the sentence pattern "verb + personal pronoun object + preposition + definite article the + part of the body"
Example: I caught him by the arm. I caught him by the arm.
I hit him on the head.
I hit him in the face.
(16) Used before choirs, orchestras, pop groups, etc.
Example: the Beatles
(17) Used in certain fixed phrases
Example: in the end
all the time
for the first time
for the first time
I hit him in the face. time for the first time
at the beginning of... at the beginning of...
(3) Cases in which no article is used
(1) No article is used in front of a proper noun (except for proper nouns formed from common nouns and in some special cases)
China China
(2) Material nouns, abstract nouns, and plural forms of countable nouns do not use articles when they express general concepts
Example: Children will children.
I like tea.
(3) No article is used when there is a determiner before a noun
Example: The book is my book.
(4) Don't use articles before seasons, months, days of the week, and meals
Example: in summer in summer
in may in May
in the summer of 2005 in the summer of 2005 (in particular)
(5) Don't use articles before ball games, board games, and recreational activities
Example: play football 踢足球
play Chinese chess 下中国象棋
(6) 在报纸、文章标题、新闻头头题、提纲、剧本提示、书名前不用冠词
(7)称呼词、头衔、职务前不用冠词，在句子中做主语、同位语、宾语补足语或主语补足语时不用冠词，当这些这些这些这些句中做主语、同位语、宾语补足语或主语补足语时不用冠词，当这些这些这些句中做主语、同位语、宾语补足语时不用冠词。
Example: Tom is monitor of our class. Tom is the class monitor of our class.
The king likes his daughter very much.
(8) Holidays and other nouns are not preceded by articles
For example: Children's Day is coming.
Special case: The Spring festival. Spring festival
(9) No article is used before a language, a subject, or a means of transportation
Example: speak English speak in English
speak in english speak in English
on feet walk
by bus by bus
(10) Some individual nouns that represent abstract concepts are not preceded by articles
Example: at school 在求学
特例：at the∕a shool 在学校里（非抽象）
(11) Two or more singular countable nouns in a conjunction do not need to be accompanied by articles, and in the case of certain parallel nouns, the articles in the nouns that follow them can sometimes be omitted to avoid repetition. can be omitted, is to avoid repetition, can also not be omitted
Example: Boy and girl like music very much.
The boy and (the) girl danced till midnight.
(12) No articles are used before the names of streets, squares, parks, stations, airports, bridges, universities, and magazines
Example: Time Time Magazine
Special: The central Park Central Park
The Red Square Red Square
(13) No articles are usually used before proper nouns, but sometimes the word "article" or indefinite article can be added. (13) A proper noun is usually not preceded by an article, but sometimes it can be preceded by a definite or indefinite article to indicate "a momentary..." or "a new..."
Example: The China ruled by the "gang of four" is gone, and the "gang of four" is now in a position of power, but the "gang of four" is not in a position of power.
Example: The China ruled by the "gang of four" is gone, a mew China will be born.
The China ruled by the "gang of four" is gone, a new China will be born.
(14) Used in fixed phrases without articles
Example: get up get up
lots of lots of, many