英语不定冠词的用法知识点要点解读
不定冠词用于表示泛指，一般修饰单数可数名词，有a和an两种形式。当紧跟冠词的名词的第一个音素是辅音音素时，用不定冠词a；当紧跟冠词的名词的第一个音素是元音音素时，用不定冠词an。
1．不定冠词的基本用法
(1)用在可数名词单数前，泛指某一类人或物中的任何一个。
It is generally accepted that a boy must learn to stand up and fight like a man.
人们普遍认为男孩子必须学会像男人那样站起来战斗。
(2)用在专有名词前表示“某一个”，相当于a certain。
—Excuse me，would you please give the iPad to John?
——打扰一下，请你把这个iPad给约翰好吗？
—Sorry，but I don't think there's a John in our class.
——对不起，但是我认为在我们班里没有叫约翰的。
(3)用在“be＋of＋a/an＋名词”结构中，表示“同一，相同”时，相当于of the same＋名词。
The two plants look different，but they are of a kind (＝of the same kind)．
这两种植物看上去不同，但属于同一类。
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2．不定冠词的活用(1)用于序数词前，表示“又一，再一”。First impressions are the most lasting.After all，you never get a second chance to make a first impression.最初的印象最持久。毕竟， 你不可能再有机会给别人留下一个第一印象。(2)不定冠词可以用于某些具体化的抽象名词前。具体化的抽象名词通常有success，failure，surprise，pleasure，beauty，pity，danger，comfort，honour等。Being able to afford a drink would be a comfort in those tough times.在艰苦的时期，能够买得起一杯饮料是一件令人感到欣慰的事。(3)有些不可数名词如knowledge，collection，understanding等后面加of...时， 前面需用不定冠词a/an。have a (good) knowledge of...“精通……”；have a (clear/good) understanding of...“了解……”。If you don't have a good knowledge of English，it's out of the question for you to use it flexibly and fluently.如果你不精通英语，就不可能灵活流利地运用它！3．固定搭配中的不定冠词all of a sudden突然地 as a matter of fact事实上at a loss不知所措；困惑 pay a visit to参观；拜访be/go on a diet节食 give sb. a lift让某人搭便车make a fool of 愚弄 in a hurry匆忙地make a living谋生 a waste of...浪费once in a while偶尔 keep an eye on 留意；留神have a gift for在……方面有天赋have a word with与……谈话in a way从某种意义上说as a result/consequence 因此with half an ear心不在焉地听[题组试做]Ⅰ.单句语法填空1．(2020·玉溪第二次联考)Instead, she is earning ￡6，500 a day as a model in New York.2．(2020·济南针对性训练)Although there has been an increasing amount of literature about tea in recent years，such literature is certainly not new.3．(2020·成都模拟)Musical knowledge was a matter of higher learning.4．(2020·济宁三模)I sat next to the man and had an amazing conversation.5．(2020·日照联考)Many people may think the Forbidden City, or the Palace Museum, is an outstanding and oldfashioned museum.Ⅱ.单句改错6．(2020·肇庆一模)They live far from the school, and it takes them about a hour and a half to go to work every day. 第一个a→an/one7．(2020·河南师大附中二模)That accident took place on winter morning of the year 2020. winter前加a8．(2020·沈阳第三次质量监测)I came to the full stop，and we started at each other. the→a9．(2020·南昌重点中学段考)Besides，taking a bike is environmentally friendly means of transport. is后加an10．(2020·湛江市调研)As the secondyear senior student I had to get myself prepared for the College Entrance Examination which was only a year away.第一个the→a
