0  317034  317042  317048  317052  317058  317060  317064  317070  317072  317078  317084  317088  317090  317094  317100  317102  317108  317112  317114  317118  317120  317124  317126  317128  317129  317130  317132  317133  317134  317136  317138  317142  317144  317148  317150  317154  317160  317162  317168  317172  317174  317178  317184  317190  317192  317198  317202  317204  317210  317214  317220  317228  447090 

2. They had ___wonderful train ride to Chengdu before they went on to ___Mount Emei by bus. A. a…the          B. /… the        C. a…/                 D. the…a

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例1、I earn 10 dollars_________ hour as _________ supermarket cashier on Saturdays.

A. a...an    B. the...a     C. an...a    D. an...the

答案为C。

[解析] hour以元音开头,前面加不定冠词an,an hour“每小时”;a表示“一个”,放在supermarket cashier前面表示类指,说明属哪类人。译文:星期六我作为超市出纳员每小时挣10美元。a/an的用法规则:以元音音素开头的单词前用an,以辅音音素开头的单词前用a。

例2、One way to understand thousands of new words is to gain________ good  knowledge of basic word formation.

A. /     B. the     C. a     D. one

答案为C。

[解析] knowledge是不可数名词,当被某些修饰语修饰时,前面要加不定冠词,如:He has a very good knowledge of English.他在英语方面有丰富的知识。

例3、Alexander Graham Bell invented ________telephone in 1876.

A. /   B. a   C. the   D. one

答案为C 。

[解析] the+可数名词单数表示一类泛指。

例4、The cakes are delicious. He'd like to have ________ third one because _______ second one is rather too small.

A. a…a    B. the…the     C. a…the    D. the…a

答案为C。

[解析] 注意序数词前面的冠词的用法:当序数词表示顺序时用定冠词the;表示再来一次使用不定冠词a (an)。从句子的意思可知,third one表示再吃一个,所以填a;second one表示所吃的第二个,所以填the。这句话的意思是:蛋糕很好吃。他想再吃一个,因为他吃的第二个太小了。

例5、A bullet hit the soldier and he was wounded in  ________leg.

A. a     B. one     C. the     D. his

答案为C。

[解析] 伤及某人某部位或拍、打、拉某人某部位要用句式wound/bit/beat/pat/take+sb+介词+the+部分。译文:子弹击中了战士,他的腿受了伤。

例6、________people in the world are sending information by email every day.

A. Several million   B. Many million    C. Several millions  D. Many million

答案为A。

[解析] 在million,hundred等前如果有具体数字或several等词时,要用单数形式。many一般不与million等词连用。在表示不确切数目时用复数,例如:表示“数百万”,英语为millions of。译文:每天,世界上有百十万人通过email传递信息。 

例7、________ of the land in that district  ________covered with trees and grass.

A. Two fifth...is   B. Two fifth...are  C. Two fifths...is  D. Two fifths...are

答案为C。

[解析] 分数的分子用基数词,分母用序数词表示。如果分子大于1,序数词后加-s。分数和百分比作主语时,谓语动词的形式取决于分数和百分数后的名词。句子中的主语land是单数,所以谓语动词要用is covered。 

例8、Paper produced every year is ________ the world's production of vehicles.

A. the three times weight of     B. three times the weight of

C. as three times heavy as     D. three times as heavier as

答案为B。

[解析] 表示倍数的词数放在the weight of前,意思是“……重量的几倍”。 

例9、 An accident happened at_________ crossroads a few metres away from_______ bank.

A. a…a    B. /…a    C. /…the    D. the…/

答案为A。

[解析] at a crossroads表示“在十字路口”,crossroads“十字路口”是复数形式单数用法;bank是可数名词,不能单独使用(要加冠词或复数),又非特指,不能用the。此处是泛指,前面要用不定冠词a。

例10、Smith _____ me to buy several _____ eggs for the dinner

A、asked…dozen    B、suggested…dozens of

C、had…dozen     D、persuaded…dozens of

答案为A。

[解析] “dozen +复数名词”前除了用具体数词修饰外,还可以用several, many 修饰,如several dozen people, many dozen students等,dozen 不加s。

第三节 巩固练习

Direction: Beneath each of the following sentences there are four choices marked A, B, C and D. Choose the best answer that completes the sentence.

1. It takes us ________ hour or more to go to my hometown by ________ train.  A. an…a      B. a…an     C. an… /        D. a…/

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4、dozens of, scores of, hundreds of, millions of, tens of thousands of, hundreds of thousands of, tens of millions of等结构可用来表示不确定的数量.

例如:Hundreds of thousands of people are going to watch the fireworks in the Central Park.

She bought dozens of eggs last week.

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3、several 或基数词修饰 hundred, thousand, million 表示计数时,一般不用复数形式.

例如:several hundred students watched the match.

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1、如两个形容词都有冠词,表示两个不同东西。 例如:My grandpa raises a black and a white dog.  我爷爷养了一只黑狗和一只白狗。     The black and the white dogs are his.  这只黑狗和白狗都是他的。 2、如后一个形容词无冠词,则指一物。 例如:My grandpa raises a black and white dog.  他养了一只黑白花狗。

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第二节 实战演练

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(四)分数、小数、百分比、倍数、四则运算的表示方法

类别
说明
例词或例句
分数
分子用基数词,分母用序数词,分子大于1,分母的序数词用复数。
1/2 读作 a (one) half
1/3 读作 a (one) third
1/4  读作a (one) quarter或a (one) fourth
4/5  读作four fifths
4 2/3 读作four and two thirds
Two thirds of the earth surface is covered by water.(地球表面的三分之二覆盖着水)
小数
小数点读作point。小数点后面各数都按个位基数词读;小数点前面仍按基数词读。零读作o或zero.
0.7 读作zero point seven
25.25 读作twenty-five point two five
百分比
百分比由基数词+percent组成 ( % )
2% 读作two percent
44%  读作forty-four percent
100%  读作one hundred percent
More than 25 percent of the surface of the ground is covered with grass. 百分之二十五以上的地面被草覆盖着。
倍数
(1)   倍数+as+形(副)原级+as
(2)   倍数+形(副)比较级+than
(3)   倍数+ the size(length , height , width , etc .)+ of (表示大小或数量的名词)
This room is three times as large as that one .
This room is two times larger than that one.
This room is three times the size of that one .
注意:上述三个结构的意义是相同的。
汉译表达:
这间房是那间房的三倍大 。
加、减、乘、除四则运算
用基数词表示
加号用plus / and
减号用minus
乘号用times
除号用divided by
9+8=17, 读作 Nine plus (and) eight is seventeen.
11-5=6 , 读作 Eleven minus five is six.
6×5=30, 读作 Six times five is thirty.
35÷7=5, 读作 Thirty-five divided by seven is five.

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(三)使用序数词的情况

   (1)第几

(2)月份后的号 (August 5th)

(3)事物表示顺序 (名词在后,如:the fiftieth page; the Second World War)

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(二)使用基数词的情况

   (1)念数 (o 念作 /o /或 zero)

(2)电话号码(62083338)

(3)事物表示编号顺序 (名词在前,如:Room 303; World War Two)

(4)货币 (100 dollars)

(5)度量 (50 kilos)

(6)小数 (2.5 meters)

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(一)  数词的词形

   (1)在1-12中,1-12为基数词中的数词;序数词1-3为特殊变化,序数词4-12在基数词词尾加-th。[注意 fifth (第五);ninth (第九)和 twelfth (第十二)的特殊拼写]。

(2)在13-19中,13-19基数词在数词3-9后加-teen构成。其中13 和15 发生拼写变化 :thirteen 和 fifteen ,相应序数词在基数词后加-th构成。13-19岁的少年用teens (in one’s teens在某人十多岁时)。

(3)在20-90整十位数,在基数词2-9之后加-ty构成。其中20、30、40、50拼法特殊。在构成相应的序数词时,将词尾y变i,再加-eth。表示二十多岁等用twenty 等的复数twenties (in one’s twenties 在某人二十多岁时)。

(4)两位数之间的数,由十位数加个位数构成,中间用连字符。构成序数词时,连字符前为基数词,后为序数词。如:二十五 twenty-five; 第九十九 ninety-ninth.

(5)100以上数词,整百位数由1-9加 hundred构成,序数词在词尾加-th;整千位数由1-9加thousand构成,序数词在词尾加-th。在百位和个位之间须加and,如:141 one hundred and forty-one;1201 one thousand two hundred and one ,构成序数词只将最后一个数变成序数词。

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