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单词 a
释义 ☞ uncountable nounsa/ə;strong form eɪ ; ə; e/(also an /ən ;strong form æn ; ən; æn/) indefinite article ☞the form an is used before a vowel sound. 元音前用an。 1. one 一(个): ◇a cup of coffee, please. 请给我一杯咖啡。◇we've got an apple, a banana and two oranges. 我们有一个苹果、一根香蕉和两个橘子。 2. used when you talk about one example of sth for the first time (用于首次提及的事物): ◇i saw a dog chasing a cat this morning. the cat climbed up a tree. 今天早上我看见狗在追猫。那只猫爬了上树。◇have you got a dictionary (= any dictionary)? 你有词典吗? 3. used for saying what kind of person or thing sb/sth is (用以表达何种人或物): ◇he's a doctor. 他是医生。◇she's a muslim. 她是穆斯林。◇you are a clever boy. 你是个聪明的孩子。◇‘is that an eagle?’‘no, it's a falcon.’ “那是鹰吗?”“不,是隼。” 4. (used with prices, rates, measurements) each (与价格、比率、度量衡单位连用)每,每个: ◇i usually drink two litres of water a day. 我一天通常喝两升水。◇twice a week 一星期两次◇he was travelling at about 80 miles an hour. 他当时正以每小时约80英里的速度行进。 5. used with some expressions of quantity (与某些表示数量的词连用): ◇a lot of money 很多钱◇a few cars 几辆汽车 6. used when you are talking about a typical example of sth (用以指某物的典型例子): ◇an elephant can live for up to eighty years. 大象可以活到八十岁。 you can also use the plural in this sense elephants can live for up to eighty years. 这个意义也可用复数:elephants can live for up to eighty years. for more information about the indefinite article, look at the quick grammar reference section at the back of this dictionary. 有关不定冠词的详细用法,参看本词典末“语法便览”部份。 a-/eɪ ||; e/prefix (in nouns, adjectives and adverbs 用于构成名词、形容词及副词) not; without 非;没有: ◇atheist 无神论者◇amoral 不遵循道德规范的 a /ə; ə; strong 强读 e; eɪ/ also 又作 an (before a vowel sound 用于母音前)determiner 1. used before a noun to show that you are talking about a general type of thing, not a specific thing [用于名词前泛指一类事物,而非特指]:◇do you have a car? 你有汽车吗?◇her boyfriend is an artist. 她的男朋友是位艺术家。→ compare 比较 the 2. one 一(个):◇a thousand pounds 一千英镑◇a dozen eggs 一打鸡蛋 3. used in some phrases that say how much of something there is [用于某些表示数量的片语中]:◇a few weeks from now 从现在算起的几个星期◇a lot of people 许多人 4. every or each 每一:◇a square has 4 sides. 正方形有四条边。◇once a week/$100 a day etc (=one time each week, $100 each day etc) 每周一次/每天 100 元等: he gets paid $100,000 a year. 他一年可赚十万元。 5. used before two nouns that are frequently mentioned together [用于常被一起提及的两个名词前]:◇a knife and fork 一副刀叉 6. used before some singular nouns that are actions [用于某些表示动作的单数名词前]:◇have a look at this. 看看这个。usage note 用法说明: a or 或 anyou use an before a word that starts with a vowel sound. 在以母音开头的单词前用 an:◇an apple 一个苹果◇an hour 一小时◇an mba 一名工商管理学硕士。use a for words that do not begin with a vowel sound. 在不以母音开头的单词前用 a:◇a house 一幢房子◇a useful tool 一件有用的工具◇a cd player 一台雷射唱片机。note that you make this choice according to what the words sound like, not whether the first letter actually is a vowel or not. for example although the letter 'h' in 'hour' is not a vowel, an is used because it is pronounced like a vowel in this word. 注意选择应根据单词发音,而非首字母是否母音。例如虽然 hour 中的字母 h 不是母音,但因为它在单词中发音是母音所以用 an。 a- /e, æ, ə; eɪ, æ, ə/prefixused at the beginning of some words to mean 'not' 非[用于某些单词的开头]:◇atypical 不[非]典型的◇amoral 非道德的; 没有是非观念的 ☞ a☞ a, a☞ a, a
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