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A a [误] I think it is an useful English dictionary. [正] I think it is a useful English dictionary. [析] 在不定冠词a与an的用法中要注意的一点是:an用在以元音开头的词之前;而a则用在以辅音开头的词之前。要特别注意的是以u字母打头的单词,如useful,university等,其第一个音标是[j],所以要特别予以注意。 [误] I need a hour to finish this letter. [正] I need an hour to finish this letter. [析] 要注意hour和honest的第一个字母不发音。 [误] My teacher is a unknown man, but he is a very good man. [正] My teacher is an unknown man, but he is a very good man. [析] 要注意以u打头的单词,它的发音为[?]时,单数名词前要用an,如uncle等。 [误] There is a f in the word football. [正] There is an f in the word football. [析] 英文字母单独使用时,如其第一个发音是元音时,其前面的不定冠词应该用an而不是a. [误] I have a little brother. He is a 8?year?old boy. [正] I have a little brother. He is an 8?year?old boy. [析] 要注意这些字母的第一个发音为元音,如eight, eleven等。 | 
