摘要: 不定冠词 a/an (1)概述:a/an 常用于可数名词单数前.起泛指作用. (2)用法: A.表示数量“一个 .如:I have a brother and two sisters. B. 表示“每一个 .如:we go home twice a week. C. 表示“某一个 .如:a girl often comes to see them. D. 表示一类人.物.如:This is a chair and that’s a desk. E.用在习惯用语中.如: a lot of , have a talk, Have a rest, have a good time. (3)说明:a用在辅音之前.如:a book, a useful book; An用在元音之前.如:an “s , an hour. 典型例题 例: Do you swim? Twice a week. A. How long B. How much C. How often D. How many 解析:疑问副词how 可以和不同的形容词或副词搭配.构成固定的疑问词组:how long“多长,多久 .通常对一段时间提问,how much“多少 .通常对修饰不可数名词前的定语提问.也可以询问“价格 “时间 等,how many“多少 .是对可数名词前的数词进行提问,how often“多久 .通常是对周期性的时间状语提问. 浏览题干及选项.应答部分显然是个周期性的时间状语. 答案C. 例2. (1)One morning he found a bag . There was “s on the corner of bag. (2)There is egg on the table. egg is for you . A. a; a(A) B. a; the C. an; an(An) D. an; the (The) 解析:在上下文中如果同一个人或物反复出现几次.第一次提到时用不定冠词,以后重复出现则表示特指.用定冠词.不定冠词an用在元音音素开头的名词或词组之前. 答案:D,D 考题前沿 题1(2004.湖南长沙市卷) Can I help you, sir? Yes, i.d like five and some peas. i. potato B. tomatoes C. meat D. banana 解析:此题考查名词的复数形式.名词的复数形式一般在词尾加s或es.如:banana→bananas, tomato→tomatoes, potato→potatoes.不可数名词没有复数形式.如:meat. 答案:B. 题2 Can I hep you, madam? i.m looking for pair of shoes for my daughter. A. the B. an C. a D. some 解析:此题考查定冠词和不定冠词的用法.定冠词表特指.不定冠词表泛指.an 用于以原音发音的单词前.因此本题选C. 答案:C. 题3(2004年中考模拟试题) I was listening to wonderful piece of music when there was knock on the door. A. a; an B. /; a C. a; a D. the ;the 解析:此题考查不定冠词的用法.表示数量“一个 .用不定冠词.且knock以辅音开头.所以其前面加a; music是不可数名词.但其前面有修饰词piece,表示“一只曲子 .所以也用不定冠词.开头的形容词wonderful首个音素为辅音.故用a. 答案:C.

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