1、a |an 1 指一类人或事，相当于 a kind of .A plane is a machine that can fly.2 第一次提及某人某物，非特指。There is a tree in my garden.3 用于人名前，表示不认识此人或与某名人有类似性质的人或事. Hello, could I speak to Mr. Smith?Sorry, wrong number. There isnt_ Mr. Smith here.A. 不填 B. a C. the D. one4 用于抽象名词具体化的名词前success(抽象名词)a success(具体化) 成功的人或事a fai
2、lure 失败的人或事 a shame 带来耻辱的人或事a pity 可惜或遗憾的事 a must 必需必备的事5 用于 quite, rather, many, half, what, such 之后.This room is rather a big one.the 1 表示某一类人或物. In many places in China, the bicycle is still a popular means of transportation.2 表示说话双方都了解的或上文提到过的人或事.Bring me the book, please. 3 用于世上独一无二的事物名词前.The moon, the earth4 用于序数词和形容词副词比较级最高级前He is the taller of the two children.5 用于国家党派等以及江河湖海，山川群岛的名词前the United States, the Communist Party of China, the French.6 表示“一家人”或“ 夫妇”.Could you tell me the way to the Johnsons, please?Sorry, we dont have a Johnson here in the village.
