a

美 [ə]英 [eɪ]
  • na.
  • n.英文字母表的第一字母;【乐】A音
  • art.冠以不定冠词主要表示类别
  • 网络从;按;一个

复数:a’s 复数:A's 复数:As

aa

a

1.(用于可数名词或单数名词前,表示未曾提到的)一(人、事、物)used before countable or singular nouns referring to people or things that have not already been mentioned

2.(用于前有形容词或后有短语的不可数名词前)used before uncountable nouns when these have an adjective in front of them, or phrase following them

3.任何一;每一any; every

4.(表示为某一群体或职业中的一员)used to show that sb/sth is a member of a group or profession

5.(用于视为一体的两个名词之前)used in front of two nouns that are seen as a single unit

6.(用于某些数字前,代替 one)used instead ofone before some numbers

7.(用于价格、数量、比率等)一,每一used when talking about prices, quantities and rates

8.像(某人)的人;…式的人物a person like sb

9.(用于某人姓名前,表示说话者不认识此人)有个used before sb's name to show that the speaker does not know the person

10.(用于一星期中某天的名称前,表示具体某一天)used before the names of days of the week to talk about one particular day

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