1. 特指某些人或某些事物, 例如：
The book on thedesk is mine．
Beijing is thecapital of China.
2.指談話雙方都知道的人或事物.例如：
Open the window, please.
Let' s meet on the road outside the school gate．
What do you think of the film?
3.指上文提到的人或事物。例如：
I saw a boy. The boy was crying.
I have a bird. The bird is white.
I bought a coat.This is the coat.
4.用于世界上獨(dú)一無二的事物前面揪利。例如：
We have friends all over the world.
Which is the biggest, the sun顷链，the moon or the earth?
the sky坝橡， the world
The moon goes around the earth.
5. 用于單數(shù)名詞前表示一類人或事物
The horse is a useful animal.
The apple is a kind of fruit.
這種情況還有另外兩種表達(dá)
An apple is a kind of fruit.
Apples are a kind of fruit.
請注意旱眯，不是說沒有the+復(fù)數(shù)名詞的情況容握，是說在泛指的情況下沒有芋膘，特指是可以的旦袋。
6. 用于含有普通名詞的專有名稱前
the United States of America
the People’s Republic of China
the United Nations
組合專有名詞 the USA; the UK
