at a mouthful一大口地 all of a sudden突然地

II. 定冠词the的用法

①　表示上文提到过的人或事物。

　　He bought an English-Chinese dictionary this morning. The dictionary

is very good.

②　用于单数可数名词前，表示整体或类别。

　　The panda is a rare animal.

　　此句等于：A panda is a rare animal. = Pandas are rare animals.

③　用来表示世界上独一无二的事物。

　　the sun, the moon, the sky, the earth, the world

④　用于表示阶级、党派的名词前。

　　the Chinese Communist Party, the working class the proletariat 无产阶级

⑤　常用于含有普通名词或形容词的专有名词前。

　　A. 用于许多江海，山脉，群岛等名词前：

　　　 The Yellow River The East Sea the Himalayas the Pacific Ocean

　　B. 用于由普通名词构成的国名：

　　　 The People's Republic of China the United States

　　C. 用于机关、团体、朝代、时代、报刊杂志等名词前：

　　　the United Nations the State Council the Tang dynasty the People's Daily

　　 the Summer Palace the Peace Hotel the British Museum

⑥　用于表示方位的名词前。

　　the east the southwest the middle the Far East on the left

⑦　用于乐器名词前，但汉语拼音的乐器前不用冠词。

　　play the piano play the violin　 play erhu

⑧　用于复数的姓氏前，表示两夫妇或全家，在此情况下，这类名词作复数对待。

　　The Smiths watch TV every day.

⑨　用于某些形容词或过去分词前，表示一类人或事物。

　　the poor the rich the living the young

　the wounded the oppressed the beautiful

⑩　用在形容词的最高级前或序数词前。

　　Shanghai is the biggest city in china.

　　After the game, the first thing they wanted to do was to take a hot bath.

III零冠词用法

①　表示某一类人或事物的复数名词前，不用冠词。

　　Now people are living a happy life. Trees are planted everywhere.

②　不含普通名词的专有名词，表示泛指的物质名词和抽象名词前，不用冠词。

　　We are studying English. He is leaving for America this year.

It is pleasant to walk in soft snow. Love is always stronger than hatred.

③　名词前有指示代词、物主代词、不定代词或名词所有格修饰，不用冠词。

　　I like this picture better. Is that your book?

Take their chairs away! I do not have any money on me.

As time went on, Einstein's theory proved to be correct.

④　季节、月份、星期等名词前，一般不用冠词。

　　She likes spring while I like summer. We have no classes on Saturday.