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2．具体用法 1 指一类人或事，相当于a kind of A plane is a machine that can fly. 2 第一次提及某人或某物，非特指 I met a child in the street. 3 表示频率，表示“每一”的意义时，用在表时间、长度、重量等名词前。 People have three meals a day. 4 用在“be＋of＋a(n)＋n.”结构中，表示“相同的”，相当于the same。 We are of an age. 5 用来表示不确定的某一个，相当于a certain，some。 He is a living Lei Feng in our class. A Mr Smith wants to see you. 6 表示数量“一”的概念，与one相近，但不如one语气强。 I have a bike. It’s made in Shanghai. 7 用在物质名词前，表示“一阵，一份，一场，一种”等。 They were caught in a heavy rain. I’d like to have an ice cream. 8 否定词与比较级连用，表达最高级，常和不定冠词连用。 —What do you think of the film？ —I’ve never seen a worse one. 9 具有动作意义的名词在与have，take，make，give等动词构成短语表示一种短暂性的动作时，此名词前须用不定冠词。 have a look/walk/break/try make a choice/decision/plan give a laugh/whistle/shout 10 knowledge，collection，understanding等名词后加of...时其前常用不定冠词a/an。 Her new book is a collection of short stories. He has a good knowledge of French. 11 不定冠词用于序数词前表示“又一，再一”，相当于another。 Can you give me a second chance，please？ 12 “a most＋形容词＋名词”或“most＋形容词”，most在此不表示最高级含义，为“很，非常”的意思，相当于very；而“the＋most＋多音节形容词(＋名词)”为多音节形容词的最高级形式，表示“最……”。 This is a most interesting film. This is the most interesting film that I have ever seen. 13 不定冠词的使用与数的概念有关，如果两个名词共有一个不定冠词，那么这两个名词指同一个人或物。 His father is a teacher and poet. 14 固定词组中 a couple of，a bit，once upon a time，in a hurry 二、定冠词的用法 1 表示某一类人或物 The horse is a useful animal. 2 用于世上独一无二的事物名词前 the universe，the moon，the Pacific Ocean 3 用在被短语或从句修饰的名词前，表示特指 The young man is the student who I taught 10 years ago. 4 表示说话双方都了解的或上文提到过的人或事 Would you mind opening the door？ 5 用于乐器前面 play the violin，play the guitar 6 用于形容词和分词前面，表示一类人 the rich，the living，the wounded 7 用在姓氏复数名词前表示“一家人”或“夫妇俩” the Greens，the Wangs 8 用于序数词和形容词/副词比较级、最高级以及形容词very，only，same前 the third one That’s the very thing I’ve been looking for. 9 用于国家、党派、江河湖海、山川群岛等专有名词前 the United States，the Communist Party of China，the French 10 用于表示发明物的单数名词前 The compass was invented in China. 11 世纪、年代前加the in the 1990’s 12 用于表示具体的地点、方位、时间或某天的一部分等的名词前。 in the east/south/west/north在东/南/西/北方 on the right/left在右/左边 in the morning/afternoon在早上/在下午 13 在“动词(take/catch/pat/hit/...)＋sb.＋介词(by/in/on)＋the＋名词(身体某一部位)”结构中，名词前要用定冠词the，而不用物主代词。 He took her by the hand. | 
