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1、不定冠词a, an a用在辅音音素开头的词前 eg. a book, a useful book an用于元音开头的词前. eg. an apple, an hour 2、定冠词the 1)特指某人/某物 The book on the desk is mine. 2)世上独一无二的事物前 the sun , the moon, the earth, the sky 3)形、副最高级及序数词前 The third boy is the tallest of all. 注意： He is my first English teacher. 4)the + 姓的复数表示 某家人或某夫妇。 the Greens 格林一家/ 格林夫妇 3、不用冠词的几种情况： 1)在星期、月份、季节前不用冠词 2)学科名词前 3)球类运动及早、中、晚三餐名词前(但：①当三餐名词前有修饰词时，则要加适当的冠词. ②表乐曲演奏的名词前应加the) 1) He went to school after he had a quick breakfast. 2) play the violin / piano 在有些词组中，用冠词和不用冠词意思有较大区别。 in hospital(在住院);in the hospital(在医院) in prison( );in the prison( ) at table(吃饭，用餐);at the table(在桌旁) | 
