6．乐器前要用定冠词。

My sister is good at playing the piano.

5．定冠词和单数可数名词连用表示某一类人或事物。

(1)The compass was invented in ancient China.

(2)The lion is the King of beasts.

4．世界上独一无二的事物前加定冠词，但在space前不加。

(1)We have friends all over the world.

(2)From space, the earth looks like a huge water-covered globe.

3．在序数词、形容词最高级、代表一类人或物的某些形容词前和表示方位的名词前。

(1)January is the first month of the year.

(2)Our school is one of the largest schools in Beijing.

(3)Li Ming is always the first to come, the last to leave.

(4)In the capitalist countries, the poor are oppressed and exploited.

(5)We stood at the top of a hill and saw the sun rising in the east.

2．复述上文提到过的人或事物。

(1)Yesterday we saw a film. All of us were touched by the film.

(2)There will be a report this afternoon. Please be present at the report on time.

1．表示特指或指说话人双方都知道的人或事物。

(1)The car in front of the house is Mr Green’s.

(2)Our teacher is in the office.

4．和时间或表示度量衡名词连用表示“每一”。

(1)We have three meals a day.

(2)The train is running sixty miles an hour.

(二)定冠词主要用于以下几种情况：

3．指某人或某物，但不具体说明是何人或何物。

(1)Next week, we’ll visit a famous university.

(2)I met an old friend of mine on my way home.

2．用于单数可数名词前，可表示一类。

(1)A horse is a useful animal.

(2)A computer is a machine that can store and recall information.

英语的冠词有不定冠词(a，an)和定冠词(the)两种。

(一)　 不定冠词主要用于以下几种情况：

1．表示类别，或指某一类中的任何一个。

(1)My father is a professor.

(2)Please give me a pen to write with.