概念：冠詞時用於名詞前起限定作用的虛詞，一般用於單數可數名詞前。
冠詞分為不定冠詞(a, an )和定冠詞 (the)
1、不定冠詞a, an的用法
1）用於敘述第一次出現的人或物前。 this is a book.
2) 泛指人或物的某一類別，以區別於其他種類：
a dictionary is an important school thing.
3)、指某人或某物,但不具體說明何人或何物：
a boy is waiting for you
4). 表示 "一"這個數量,但數的概念沒有one 強烈.
we are going to h**e an english lesson tomorrow.
i h**e a mouth , a nose, two eyes and two ears.
5). 用於某些固定的片語中. a few, a little, a lot of
6) 用在重量，長度，時間或單位名詞前，表示「每一」
take the medicine three times a day.
7) 用於某些不可數名詞前表示數量「一次，一陣，乙份，一類」
there was a he**y rain in our city last night.
8) 用於可視為一體的兩個名詞前
mr green finished his supper with a knife and fork.
注: a用在子音音素開頭的詞前 eg. a book a useful book a 「u」 [ju:]
ju:sful
an用於母音開頭的詞前. eg. an apple an unhappy girl
an hour [au] an 「f」 [ef]
2、定冠詞the
1)特指某人/某物 the book on the desk is mine.
2) 指雙方都知道的人或物.
-where are the new books, jim? - they are on the small table.
3) 指上文提過的人或物.例如:
today he is ****** a machine.
he wants to ride the machine like a bike and fly it like a plane.
4)世上獨一無二的事物前 the sun , the moon, the earth, the sky
5)形、副最高端及序數詞前 the third boy is the tallest of all.
(但當這些詞前已有其他限定詞，如物主代詞、所有格、指示代詞時，則不能再用the) he is my first english teacher.
6) the + 姓的複數表示 「某家人」或「某夫婦」。 the greens 格林一家/ 格林夫婦
7）表樂曲演奏的名詞前應加the
8). 用在由普通名詞構成的專有名詞前. the great wall, the yellow river
9). 和某些形容詞連用表一類人，the rich, the sick
10) 用於表示方位 xinjiang lies in the west of china.
11) 用在一些習慣用語中
in the morning (afternoon, evening), on the left(right) at the end of
巧學妙記：
特指雙熟悉，上文已提及， 世上獨無二，序數最高端，某些專有名，習語和樂器。
3 、不用冠詞的情況（零冠詞）
1）在專有名詞前和不可數名詞前。china, grade two, bill smith, milk
2）名詞前已有作定語用的this, that, my, your, some, any 等代詞。
the letter is in her pocket. i think the shop is closed at this time of day.
3）不可數名詞和複數名詞表示一類人或事物時。
my father and mother are teachers. i like cakes.
man can』t live without water.
4）在星期、月份、季節、節日前。it is sunday (monday, tuesday, etc.)
today is mid-autumn day. it is cold in winter.
5）在稱呼語或表示頭銜的名詞前。
uncle wang likes ****** things. what colour are mrs green's shoes?
6）球類運動及早、中、晚三餐名詞前
（但：①當三餐名詞前有修飾詞時，則要加適當的冠詞. ）
he went to school after he had a quick breakfast.
he went to school after breakfast. can you play basketball?
7) 學科，報紙和文章的開頭的標題常省去冠詞
we all like reading english weekly《英語週報》
8） 在某些固定片語中，
at home, by bus, go to school 等的名詞前不用冠詞。
巧學妙記：
代詞限定名詞前， 專有名詞不可數，學科球類三餐飯，
四季星期月份前， 顏色語種和國名，稱呼習語和頭銜。
4. 使用冠詞的注意事項：
1） 單數名詞前加定冠詞，不定冠詞，複數名詞不加冠詞都可表示一類。
the orange is a delicious fruit.
an orange is a delicious fruit.
oranges are delicious fruit.
2) 如果兩個名詞所表示的是兩個不同的人或物，通常這兩個名詞前都用冠詞。
he has an english and a chinese dictionary.
3) 如果把兩個名詞所代表的人物作為乙個整體，通常只需要用乙個冠詞。
the wife and husband h**e gone to japan.
4) 如果兩個名詞所指的是同一人或者同一物，通常只在第乙個名詞前加冠詞。
she is a singer and dancer.
5) 序數詞前加定冠詞時，表示「第幾」 如加不定冠詞則表示「再，又」
he is the third to hand in the exercise book.
he has a third try to reach that branch(樹枝)
6) 形容詞最高端前一般加定冠詞表示「最」加不定冠詞，表「很，非常，特別」
she is the most beautiful girl in our class.
she is a most beautiful girl.
7) 在某些短語中，用定冠詞和不定冠詞含義是不同的。
in front of, in the front of ; a number of , the number of; at table, at the table
例題解析：舉一反三，學的更輕鬆！
1milk is foodmilk in this cup has gone bad.
2. ---do you like playing ____ football?
---yes. but i h**e only _____ basketball.
3. do you know ____girl on _______another side of _______ lake?
4. there'su" ands" in ________work "use".
5. she says ______animals cant's live without ________air, either.
6. his father, who is ____honest man, is teaching in _____ university.
7. which is he**ierelephant orhorse?
8cold wind was blowing from the north.
9. he is always ready to helpold andyoung.
10greens are tr**eling insouth china.
11. althoughmost of us like to drink beer, those who drink ________most are _______ least healthy.
saw __ interesting film last night. ___ film was about __ kind doctor.
13. you can h**esecond try if you fail _______ first time.
14. tom went toschool as usual, but he didn't know his father went to ________school for a parent meeting.
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