1. 每一
2. （非特指的）一（个）
3. 一种
4. an在辅音前的形式
5. 一副
6. 任一
7. 某一
8. 用于可数名词或单数名词前
9. （表示未曾提到的）一（人、事、物）
10. 用于前有形容词或后有短语的不可数名词前
11. 表示为某一群体或职业中的一员
12. 用于视为一体的两个名词之前
13. 用于某些数字前，代替 one
14. 像（某人）的人，…式的人物
15. 有个
16. 用于一星期中某天的名称前，表示具体某一天

1. 表示"第一"的符号
2. 一
3. 任何一个
4. 英文字母表的第一字母
5. 【数】第一已知数
6. 优等
7. 腺苷
8. A字母的音
9. A字母的活字

1. A的
2. 第一的

1.（指初次提及或非特指的人或物）一（个）
You usea oran when you are referring to someone or something for the first time or when people may not know which particular person or thing you are talking about.

e.g. A waiter entered witha tray...
侍者端着托盘进来了。
e.g. He started eating an apple...
他开始吃苹果。

2.（一类人或事物中非特指的）任何一（个）
You usea oran when you are referring to any person or thing of a particular type and do not want to be specific.

e.g. ...expensive make-up that we saw being advertised bya beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品
e.g. I suggest you leave it to an expert...
我建议你把它留给专家来解决。

3.（用于前加形容词或后加修饰语的不可数名词之前）一（种）
You usea oran in front of an uncount noun when that noun follows an adjective, or when the noun is followed by words that describe it more fully.

A

e.g. There wasa terrible sadness in her eyes...
她眼神中流露出深深的悲伤。
e.g. He did havea real knowledge of the country...
他对该国的确知之甚多。

4.（用于物质名词前）一（类），一（种）
You usea oran in front of a mass noun when you want to refer to a single type or make of something.

e.g. Bollinger 'RD' isa rare, highly prized wine.
博林格RD香槟是一种名贵的备受推崇的葡萄酒。

5.（用于表示数量的词组中）许多/少许/一点
You usea in quantifiers such asa lot ,a little, anda bit.

e.g. I spenda lot on expensive jewelry and clothing...
我花很多钱购买昂贵的首饰和衣服。
e.g. I've come looking fora bit of advice.
我特来讨教。

6.（一类人或事物中典型的）一（个）
You usea oran to refer to someone or something as a typical member of a group, class, or type.

e.g. Some parents believea boy must learn to stand up and fight likea man.
有些父母认为男孩子必须学会像男子汉一样顶天立地，勇于抗争。
e.g. ...the operationa patient has had.
病人做过的手术

7.（用于日子、月份或节日的名称之前以表示特例）一个
You usea oran in front of the names of days, months, or festivals when you are referring to one particular instance of that day, month, or festival.

e.g. The interview took place ona Friday afternoon...
采访是在一个星期五的下午进行的。
e.g. It wasa Christmas when shoppers passed by expensive silks in favor of more practical gifts.
这是一个购物者不理会昂贵的丝绸衣服而热衷于更实用礼物的圣诞节。

8.（从事某一职业的）一（位），一（名）
You usea oran when you are saying what someone is or what job they have.

e.g. I explained that I was an artist...
我解释说自己是个艺术家。
e.g. He was nowa teacher anda respectable member of the community.
他现在是一位教师，并且是社区内受人尊敬的一员。

9.（用于不为说话人所知的首次提到的人名前）某一（个）
You usea oran in front of the names of people as a way of indicating that you do not know them or anything about them and you are saying their name for the first time.

A的意思

e.g. The full address ona stick-on label was that ofa Mrs P. R. Slater of Peterborough...
不干胶标签上的完整地址写的是彼得伯勒的一位P. R. 斯莱特太太。
e.g. A Dr Matthew Owens was reported missing while on an expedition to north-eastern Turkey.
据报道，一位叫马修·欧文斯的博士在前往土耳其东北部考察的途中失踪了。

10.（用于人名前，表示与该人有相同特性或品质）类似…的一个（或一位）
You usea oran in front of the names of people when you want to refer to someone else who has the same qualities or character as the person named.

A什么意思

e.g. When I listen to her play I can heara new Nigel Kennedy.
从她的演奏中我听出了新一代的奈杰尔·肯尼迪。

11.（用于姓氏前，表示某人属于某姓氏家族）一位姓…的人
You usea oran in front of a surname when you want to refer to someone who belongs to the family with that surname.

A的近义词

e.g. As far as I can recall, Patti wasa Smith.
我记得帕蒂是姓史密斯的。

12.（用于艺术家名字前）一幅…的画，一件…的雕塑作品
You usea oran in front of the names of artists to refer to one individual painting or sculpture created by them.

e.g. Most people have very little difficulty in seeing whya Van Gogh isa work of genius.
多数人不难理解为什么凡·高的作品是天才之作。

13.（代替数字one使用，尤用于hundred，hour和metre等表示度量的单词之前以及half, quarter和third等分数之前）
You usea oran instead of the number 'one', especially with words of measurement such as 'hundred', 'hour', and 'metre', and with fractions such as 'half', 'quarter', and 'third'.

e.g. ...more thana thousand acres of land.
1,000多英亩地
e.g. ...a quarter of an hour...
一刻钟

14.（用于表示比率的短语中）每一
You usea oran in expressions such aseight hours a day to express a rate or ratio.

e.g. Prices startat £13.95a metre for printed cotton...
印花棉布以每米13.95英镑的价格起售。
e.g. The helicopter can zip along at about 150 kilometres an hour.
该直升机能以每小时150公里左右的速度疾进。

1. minimum n：scheme n计划,方案;阴谋 | minimum n最小最少;a,最小的,最低 | invade v侵入

2. A的近义词

2. classic n：clasp vt.扣住,扣紧;vt.握紧,抱紧; | classic n.名著,杰作;a,第一流的,经典的; | classify vt.把..分类,把..分级;列为机密;

• with a pinch of salt有保留地
• stand a chance有希望
• a dose of one's own medicine自己惹来的恶果,自己...
• flog a dead horse徒劳无益
• keep a stiff upper lip坚定不移(顽强不屈...
• a bag of bones骨瘦如柴的人...
• once in a blue moon罕见的，极少的，难得...
• show a clean pair of heels逃走(溜之大吉)...
• birds of a feather同类型的人
• with a grain of salt有保留地
• bring to a stand终止
• turn over a new leaf重新开始
• as a matter of fact事实上
• bring to a standstill结束(使终止...
• turn up again like a bad penny不要它偏又回来,挥去...
• at a loose end无事做
• throw a fit大发脾气
• blow a fuse使保险丝熔断(勃然大...
• cut a poor figure出丑
• take something with a grain of salt将信将疑

圣诞节

A：Havea Merry Christmas.
祝您圣诞快乐!

B：Thank you.
谢谢。

假期

A的翻译

B：It’s such (a beautiful/ an exquisite/a lifelike) statue.*
这尊雕像真是（漂亮/精致/栩栩如生）。

A

A：I agree.
是这样。

租房

A：You’ve donea (great/ wonderful/ magnificent) job.
你工作很出色。

B：Thanks.
谢谢。

1. 通常来说，a 是用在以辅音开首的词前面，an 是用在以元音开首的词前面；
2. 可数名词前面用 a（或 an），不可数名词前面不可用a（或 an)，如可以说 a healthy boy，却不可以说 a health；
3. 在特定情况下，a（或 an）可以用在复数形式前面:习语中有a few (books)，a great many (books)等表示方法。在表示时间或款项的短语前面，如 a further five minutes。在若干在形式上是复数而在意思上是单数的单词前面，如 a barracks，a links。在美国口语中，如 a good ways，a long ways；
4. a（或 an）有时有“一个而不是那所要的一个”的意思。a 也有“任何一个”的意思。

   I got a letter indeed，but it was from a friend.
   事实上，我收到了一封信，但只是一个朋友的来信。

   I wanted to read a book，I did not care whether it was a history，a novel，or a biography.

5. a 与 few 搭配使用时，few 是“很少”，有“几乎没有”的意思。a few 是“若干”，有“颇有几个”的意思。注意，only a few 却等于 few，也是“很少”的意思。