7.在某些习惯用语中的名词前不用the, 以具体名词表示抽象概念, 如: at home, at first, by bus, by train, go to bed, go to school, in bed, in time

　　　 　　a. The thief was thrown into prison.

　　　 　　b. Before I go to bed, I’d like to have a cup of tea.

　　　 　　c. Shall we go by plane or by train?

　　　 　　d. The teacher asked us not to talk to each other in class.

6.表示职务,头衔的名词在句中作同位语,补语,表语时, 其前不用the

　　　 　　a. He is elected monitor of our class.

　　　 　　b. People elected him president of that country last year.

5.在表示三餐的名词之前不用the

　　　 　　a. Let’s go out to dinner.

4.在表示公园,火车站的名词前不用the, 如: Beihai park, Zhongshan Park, Beijing Railway Station

3.在表示称呼的名词(与人名,专有名词连用)之前不用the, 如: Mr. Brown, Miss Green

2.国名,人名前不用the, 如: China, Japan, Mary, Henry

1.复数可数名词或不可数名词表示一般意义而不特指具体的人或事物时, 不用the

　　　 　　a. Horses are animals.

　　　 　　b. I like flowers.

　　　 　　c. Milk is white.

　　　 　　d. Mr. Smith likes to have rice for dinner.

　　　 　　e. Chairs are usually made of wood.

4.副词too, quite, rather等修饰形容词时, a位于该副词之后

a. That is quite a sudden change.

　　 　　b. We got rather a surprising result. (也可以说: a rather surprising result)

定冠词

3.在形容词比较句中

　　 　　a. He is as great a man as ever lived.

　　 　　b. This is more valuable an idea than the others.

2.在有些感叹句中, a / an位于形容词之后

　　 　　a. How nice a man you are !