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专题突破三冠词 考点1:不定冠词a(an)的用法 用法 例句 This is a useful book He is an honest boy a用在辅音音素前,【注意】第一个例句中“u” an用在元音音素前发[j:];第二个例句中 “h”不发音,“o”发元音 用于第一次提到的人或 物、可数的单数名词前, Here is a map of Japan I have a good mother 表示 相当于 one 用在可数的、单数形式 An apple a day keeps the 的普通名词前,表示价 doctor away 格、速度、时间、频率等 We take p.E. lessons 度量上的“每 twice a week 抽象名词在某些情况下 It, s fun to have a chat 可以与不定冠词连用 ou 表示“一种、一场”等 用在单数名词前,表示 The sun is a star 类人或物中的任何 a knife is used for cutting 用在序数词前表示“又 He copied the new words a 再一”的意思 third time have a look a lot of have a 用于固定短语中 good time. a little. a few 【归纳】初中常见元音音素开头的单词 A a apple/artist/Asian/American Ee egg/eight-year-old/11-year-old boy/exciting I i idea/interesting 0o orange/old/ outgoing Uu umbrella/ugly/unusual/unhappy 特(例用(法 如果三餐名词之前有定语修饰时,可加不定冠 词。如 We had a wonderful lunch.我们吃了一顿很好的 午餐。 He gave me a good supper.他请我吃了一顿丰盛的 晚餐。 4. A spaceship flies at about nineteen kilometers second e B. a D 5. This is interesting book and it's also most interesting one Ive ever read an.