冠詞作為壹種虛詞，在英語中只能和名詞壹起使用。英語中的冠詞分為不定冠詞和定冠詞。
1.不定冠詞的用法
不定冠詞有兩個，a 和 an。a用在輔音開頭的單詞前面；an用於以元音開頭的單詞前。如：a book, an apple。
1） 不定冠詞用在但數可數名詞前表示“某壹個”。如：
There is a po1iceman at the door.
門口有個警龘察。
2) 不定冠詞用在單數可數名詞之前，表示“任何，每個”。如：
A car must be insured.
汽車壹定要上保險。
A soldier must obey orders.
軍人必須服從命令。
3) 不定冠詞用於頭壹次出現的單數名詞之前。如：
There is a box in the room. The box is heavy.
房間裏有個箱子。這個箱子很重。
4) 不定冠詞和名詞連用作表語或同位語，主要說明某個人或東西所屬類別。如：
She is a teacher. 她是個老師。
We all thought him a suitable person for the job.
我們都認為他是適合做這個項目的人。
5） 定冠詞用在價格、速度、比率等短語中。如：
six kilometers an hour 每小時60公裏
3 times a day 每天三次
6) 不定冠詞用在專有名詞前。如：
He wants to buy a Kodak.他想買架柯達相機。
7）不定冠詞用於某些固定短語中。如：
have a try試壹下 take a break 休息壹下 have a good time 玩得痛快
make a living 謀生 as a matter of fact 事實上 in a word 總而言之
2. 定冠詞的用法
1） 定冠詞和名詞連用，表示某個或某些特定的人或東西。如：
Mother carved the meat into slices.
媽媽把肉切成了片。
2） 定冠詞用於可數名詞前，表示壹類人或東西。如：
The horse is a useful animal. 馬是壹種有用的動物。
3） 定冠詞用於第二次出現的名詞之前。如：
I got a letter yesterday. The letter was sent by e-mail.
我昨天接到了壹封信。那信是電子郵件。
4） 定冠詞用於有詞組或者定語從句修飾的名詞前。如：
He is investigating the cause of the fire.他正在調查這場大火的原因。
5） 定冠詞用於某些名詞或者形容詞前，表示壹類人，壹個民族，階級或階層。如：
the chinese 中國人 the rich 富人
the dead 死者 the deaf 聾人
6） 定冠詞用於指說話雙方都知道的人或事。如：
Please close the door.請把門關上。
7） 定冠詞用於世界上獨壹無二的事物前。如：
the sun 太陽 the earth 地球 the world世界
8） 定冠詞用於序數詞前表示順序。如：
the third group 第三組
9） 定冠詞用於形容詞和副詞的最高級前面。如：
This is the most intersting book I have ever read. 這是我所讀過的書中最有趣的壹本。
10）定冠詞在play後和樂器連用
play the piano彈鋼琴 play the flute吹長笛
11）定冠詞與姓氏的復數形式連用，表示壹家人。如：
The Blacks came to China in 1994.
布萊克壹家是1994年來中國的。
12）定冠詞的其他用法
the Changjiаng River長江 the Red Sea 紅海 （用於表示江河海洋的名詞前）
the Taiwan Straits臺灣海峽 the Gulf of Mexico墨西哥灣 （用於表示海峽海灣的名詞前）
the Alps阿爾卑斯山 the Sahara Desert撒哈拉沙漠 （用於山脈沙漠的名詞前）
the People’s Republic of China 中華人民***和國（用於國家名稱）
the National Gallery國家美術館 the Military Museum 軍事博物館(用於公***建築名前)
the State Council國務院 the Senate參議院 the House of Representatives 眾議院 （用於機關、團體名詞前）
the Geneva Agreement日內瓦協議 the Washington Post 華龘盛頓郵報 (用於報刊、條約之前)
3.不用冠詞的情況
1） 表示獨壹無二的職務、身份前壹般不用冠詞。如：
Elizabeth II, Queen of England 英國女王伊麗莎白二世
He was elected chairmen of the committee.他當選為協會主席。
2） 表示球類、棋類的運動項目不加冠詞。如：
play football 踢足球 play chess下象棋
3） 在壹日三餐名詞前不用冠詞。如：
have breakfast/lunch/supper 吃早飯/午飯/晚飯
4） 交通工具名詞前不用冠詞
by car坐汽車 by ship 坐船
by plane坐飛機 on foot 步行
5） 在壹些地點的名詞，如：bed, church, school, hospital,home, work等。當人們去這些地方做在這些地方應該做的事時，不加冠詞。
go home回家 go to school去上學 go to church去教堂祈禱
in hospital住院 go to work上班
註：如果在上述詞組前面加上定冠詞the,可以表示去這些場所做其他的事情。如：
He came to the school to speak to the headmaster.他來學校和校長談話。
He went to the church to see the carvings.他去教堂看雕刻。
His mother is in hospital and he has been in the hospital to take care of her.
他媽媽生病住院了，他就壹直在醫院裏面照顧她。
4.泛指概念的四種表達方式
1） 不帶the 的不可數名詞可以表示泛指
I like music.我喜歡音樂。
2） 不帶the 的復數可數名詞表示泛指。
Bananas are yellow.香蕉是黃色的。
3） “the+單數可數名詞”可以表示泛指
The elephant is the largest land mammal.大象是陸地上最大的哺乳動物。
4） “不定冠詞a/an+單數可數名詞” 可以表示泛指。
A dog makes good pet.狗是很好的寵物。
5.冠詞的記憶口訣
1.巧記a和an：單詞：不見原因(元音)，別施“恩 (n)”。 字母表：Mr Li has one fox.（ a,e,f,h,i,l,m,n,o,r,s,x前用an）。
2.使用定冠詞口訣
沙漠、河流與群山，列島、海峽與海灣，階級、黨派、國家名，組織團體和機關，方位、朝代、獨壹詞，
會議、代件及報刊，木器、建築、海洋群，定冠詞來不能刪。
3.冠詞省略口訣
泛指復數日三餐；球類運動季節前；星期月份節假日；抽象物質或習慣。
註:農歷的節假日需用定冠詞。
4.巧記零冠詞：獨壹職位在某地，用作表、補、同位語；獨立主格作狀語；By短語表方式；Man字壹詞意“人類”；對比含義兩名詞；系詞turn接表語；新聞語體及標題；具體意義變抽象；含有as/though的倒裝句；人名、地名、國壹詞；抽象、物質不特指；月份、星期、節假日；學科、語言、稱呼語；顏色、病名、五感覺；棋類、球類、三餐詞；復數形式表類別；固定詞組、慣用語。壹律使用零冠詞。
6.冠詞的用法練習題
1.There is a desk by the window. On_______desk there is_____exercise book.
A.a; the B.the; the C.an; a D.the; an
2.There is_______"h"in the word "honest."
A.a B.the C.an D.不填
3.They went to_______Summer Palace yesterday and stayed there for_______day.
A.the; a B.the; the C.不填; a D.the; 不填
4.It's________pity you won't be back before I leave.
A.the B.a с.an D.不填
5.Lincoln was elected__________ President of _________United States in 1860.
A.the; the B.不填; the C.a; 不填 D.不填; 不填
6.She is going to play_______piano at the concert this evening.
A.a B.an C.the D.不填
7.Most boys like playing_______football.
A.a B.an C.the D.不填
8.Let's go and watch the children play______chess.
A.a B.an C.the D.不填
9._____elephant is bigger than________ horse
A.不填; 不填 B.an; a C.An; a D.The; a
10.Is Tom going to have_______X-ray check?
A.a B.an C.the D.不填
11.They have_________rice for________lunch every day.
A.不填; 不填 B.the; the C.the; a D.不填; the
12.We did_______experiment last week. It was _______useful one.
A.the; the B.an; a C.an; the D.the; an
13.Beijing is one of________most beautiful cities in ________world.
A.a; the B.the; 不填 C.the; the D.不填; the
14.February is__________second month of the year
A.a B.an C.不填 D.the
15.----How did you go there?
----We went there by_______bus.
A.a B.an C.the D.不填
16._______Wangs will come to see you tomorrow
A.A B.An C.The D.不填
17.The students of Class One often read English early in_______ morning.
A.不填 B.the C.an D.a
18.On the moon it's too hot in________day and too cold at________night.
A.the; 不填 B.the; the C.a; the D.a;
19.A spaceship flies at about eleven kilometres_________second.
A.a B.an C.the D.不填
20.The picture on_________left is more beautiful than the one on _______right.
A.不填; 不填 B.the; the C.a; a D.an; an
21.The woman took the little girl by________hand.
A.a B.an C.the D.不填
22.Mr. Read patted him on________shoulder.
A.a B.an C.the D.不填
23.All the work had to be done by_______hand when there were no modern machines.
A.不填 B.the C.an D.a
24.We should always think of________old and_______sick.
A.the; the B.an; a C.不填; 不填 D.the; a
25.May I have _______look at the book?
A.a B.an C.the D.不填
26.It took me_______hour and______half to finish the work.
A.a; a B.an; an C.a; an D.an; a
27.She was in______hurry to work.
A.不填 B.a с.an D.the
28.My brother has an interest in drawing_______horses.
A.the B.an C.a D.不填
29.Sam is_______man easy to get along with.
A.不填 B.the C.a D.an
30.Europe and America are separated by_______ Atlantic Ocean.
A.不填 B.the C.a D.an
31.The largest landmass is usually divided into two "continents" along______Ural Mountains.
A.不填 B.the C.a D.an
32.There are only______few mistakes in your composition. Don't make______same ones again, please.
A.a; the B.a; a C.the; the D.不填; 不填
33.Henry is fond of playing________piano while Alice is interested in listening to _______ music.
A.不填; .the B.the ; 不填 C.the; the D.不填; 不填
34.What________weather we are having today!
A.a B.the C.不填 D.an
35.Tom met his old school friend on his way________home from China.
A.a B.the C.不填 D.an
36.Spring is___best season of the year. Autumn is________busy season.
A.a; a B.the; the C.a; the D.the; a
37.Let's go and have_______walk around_________garden.
A.a; the B.the; the C.a; a D.the; a
38.Children usually go to________school at _______age of six
A.the; the B.a ; the C.不填; the D.a; a
39.At last we got to________place where Chairman Ma0 had once lived.
A.a B.an C.不填 D.the
40.Sam is________man to speak at the meeting tomorrow.
A.不填 B.the C.a D.an
41.Birds can fly high in________sky.
A.不填 B.the C.a D.an
42.Taiwan is_______island, it is_______largest island of China.
A.a; the B.the; the C.an ; the D.an; a
43.It is cold in________winter. And______days are shorter.
A.不填; the B.the; the C.the; 不填 D.a; the
44.Were there is_______will there is______way
A.the; the B.a; a C.a; the D.the; a
45.The workers in that factory are paid by________hour.
A.a B.an C.the D.不填
46.________Chinese are________hardworking people.
A.The; the B.不填; a C.不填; 不填 D.the; a
47.He bought_______dictionary______last week.
A.the; the B.a; 不填 C.a; the D.the; a
48.They always have_______breakfast in the factory
A.a B.an C.the D.不填
49.Tom is_______8-year-old boy.
A.a B.an C.the D.不填
50.______sun rises in _______rest.
A.The; the B.The; 不填 C.A; the D.不填; 不填
答龘案：1.D 2.C3.A 4.B 5.B 6.C 7.D 8.D 9.C 10.B 11.A 12.B 13.C 14.D 15.D 16.C 17.B 18.A 19.A 20.B 21.C 22.A 23.A 24.A 25.A 26.D 27.B 28.D 29.C 30.B 31.B 32.A 33.B 34.C 35.C 36.D37.A 38.C 39.D 40.B 41.B 42.C 43.C 44.B 45.C 46.D47.B 48.D 49.B 50.A