8．在一些用语中，如：

　 in the morning(/afternoon/evening), in the day, by the way, on the whole, the next morning, all the year around, the other day, at the same time

7．在江河、海洋、山脉、湖泊、群岛的名称的前面，如：

　 the North China Plain

　 the Rocky Mountains

　 the Yangtse River

6．用在某些专用名词前， 如：

　 the Great Wall

　 the People’s Republic of China

　 the United Nations

　 the Netherlands

5．用在某些名词化的形容词，过去分词前，表示一类人或事物， 如：

　 the rich, the sick, the new , the false

4．用在序数词和形容词最高级前,在方位词前。如：

　 The Nile is the longest river in the world.

　 He won the first prize.

The sun rises in the east.

3．指前面提到过的人或事物，如：

　 Here is a picture of a modern car factory. My father works in the factory.

2．特指某(些)人或某(些)事物，如： 　　　 The girl in red is my sister.

　 The man over there is our English teacher.

　 The book on the desk is mine.

定冠词的用法如下：

1．指彼此都知道的人或事物，如： 　　　 Open the door, please. 　　　 Go and close the window.

5．用于某些固定词组中，如：

　 a few, a little, a lot of, a number of, just a minute, in a hurry, for a while, for a long time, a cup of, a bottle of, have a rest, have a talk, have a fever, have a good time, have(take) a walk,　 have a toothache, take a bath, give a lesson

4．表示数量，有“一”的意思，如：

　 Behind the house there is a garden.

　 once a week.