1).单词前:
a history
book
一本历史书
an honest boy 一个老实男孩
an umbrella
一把雨伞
a university 一所大学
2).字母前:
I got an A in
English again. 我的英语又得了个A。
There is an
“i” in this word. 这个单词中有个i。
There is a
'y' in the word 'year'. 这个词中有个y。
You’ve missed
out a “d” in that word. 你在那个单词中漏掉了个d。
The word
"add" consists of an a and two d’s. add
是由一个 a 两个 d
组成。
3).数词前:
a 3000-word
composition 一篇3000字的作文
an
800-metre-long bridge 一座800米长的桥
2.放在可数名词单数前表泛指,可译成 “一,一个(头,匹,辆,位,家…”) 相当于one。
Rome was not
built in a day. 罗马非朝夕建成。
There is a tiger in the zoo.
动物园里有一只老虎。
A gentleman wants to see you.
有一位先生要见你。
3.放在可数名词单数前表示“每,每一”,相当于 “per, each, every”。
His wages were
forty pounds a month. 他的工资是每月四十英镑。
We have four English lessons a week.
我们每周上四堂英语课。
We are allowed to drive miles an hour.
行车速度每小时只允许50英里。
They go to Beijing once a year.
他们一年去一次北京。
We go swimming four times a week.
我们每周去游泳四次。
4.表示一类人和事物中的 “任何一个”
A tiger can be dangerous.
老虎可能有危害性。
A horse is a useful animal.
马是有用的动物。
A cow is a domestic animal母牛是家畜。
A square has
four sides. 正方形有四条边。
A knife is made of metal and wood.
刀是由金属和木头制成的。
5.放在某些物质名词前译成 “一种, 一份”
a green tea
一种绿茶
an ice cream
一客冰淇淋
please bring me a black coffee.
请给我一杯纯咖啡。
Please give me an ice-cream and two
rices. 请给我一份冰激凌和两份饭。
6.放在某些抽象名词前译成 “一种, 某种”
What a pity! 多可怜!
What a good sleep! 睡得多香呵!
It is a pleasure to work with you.
和你一起工作真是一种快乐。
It is a bother to me. 这对我来说是件麻烦事。
She is an honour to her school.
她是个为母校增光的人。
7.放在表示风雨雪等名词前译成 “一阵”
What a heavy rain好大的一阵雨呀!
There’s a cold wind this morning.
8.放在专有名词人名前译成 “一个叫…; 一个…式/样的; 一个…的作品”
A Mr. Smith called this morning.
有位叫史密斯的先生今天早上来过电话。
A Miss Li is looking for you.
一位姓李的小姐在找你。
We need a Washington today.
今天我们需要像华盛顿那样的人物。
He is a Lei Feng. 他是一个雷锋式的人物。
He had a Qi Baishi in his room.
他的房间里有一张齐白石的画。
I have got a complete Shakespeare at
hand.我手头有莎士比亚全集。
9.用在基数词前表示一个数量单位。
a ten years 一个l0年
a dozen times l2次
spend an additional two weeks
再花两个星期
10.放在序数词前译成 “又, 又一, 再一”
Why not try a
second time? 为什么不再试一试呢?
He cast his
net for a third time. 他又撒了一次网。
Most English
people have three names: a first name, a middle name
and the
family name.
大多数的英国人都有三个名字:第一个名字,中间的名字和姓。
One is deaf,
another is blind and a third is lame.
一个是聋子,另一个是瞎子,而第三个是瘸子。
11.放在most + adj. 前译成 “很, 非常”
This is a
most interesting story. 这是一部非常有趣的小说。
He is a most
capable young man. 他是个很有才干的年轻人。
That is a
most useful book. 那是一本非常有用的书。
12.用在 “be of a/an” 结构中, 表示 “和…相同(一样)” = the same
They’re all
of a size. 它们大小一样/相同。
We are just
of an age. 我们恰好是同岁。
They are nearly of an age.
他们几乎同岁。
The two shirts are much of a size.
这两件衬衫大小差不多。
13.用于两件通常配在一起的东西或两个词同指一物或一人前。
(但指两件物品或两个人时,两个词分别用a)
a knife and
fork 一副刀叉
a cart and
horse 一辆马拉车
a red and
black skirt 一条红黑相间的裙子(一条)
a red and a
black skirt 一条红裙和一条黑裙(二条)
14.a/an 的位置:
1).a/an +
adv. +adj. + n.
a very good book 一本很好的书
a fairly interesting story 一篇相当有趣的故事
2).a/an +
adv. +adj. + n. / adv. + a/an + adj. + n.
He was bitten by a rather big (rather a big) dog.
她被一条相当大的狗咬了。
It is a quite fine (quite a fine) day today. 今天天气相当好了。
3).adv. +adj.
+ a/an + n.
It is too difficult a book for beginners. 对初学的人来说这本书太难了。
How clever a boy he is! = What a clever boy he is! 他是个多么聪明的孩子!
15.构成某些固定词组:
a lot of 许多,
a couple of 一对,
a great many 很多,
a great deal of 大量,
in a hurry
匆忙地,
all of a
sudden 突然,
once upon a
time 从前,
for a time
暂时,
in a sense
从某种意义上说,
have a look
看一看,
a place of
interest 名胜古迹
have a cold
感冒
a
little, 一点
a few, 一些
a bit of,
一点点
many a,
很多
a great deal
of, 很多
a number of,
很多
a variety of
各种各样的