最新最全英语数词讲解及练习

最新最全英语数词讲解及练习
最新最全英语数词讲解及练习

不可忽略的数词全接触

英语中的数词包括基数词和序数词两大类,它们的用法非常复杂,为了便于同学们系统地复习数词,现就初中阶段数词的主要内容作以下归纳。

一、基本构成 (一)基数词——从1数到n

1.1—12的基数词是独立的单词,即: one,two,three,four,five,six,seven,eight, nine,ten,eleven,twelve。

2.13—19的基数词以-teen结尾。如: fourteen,seventeen等,但13,15,18较特殊, 13—thirteen 15—fifteen 18—eighteen。

3.20—90的整十位均以-ty结尾。如: sixty,ninety,但20,30,40,50,80较特殊, 20—twenty, 30—thirty, 40—forty ,50—fifty ,80—eighty。

4.十位数与个位数之间要加连字符号“-”,如:28—twenty-eight,96—ninety-six。

5.百位和十位(若无十位则和个位)之间加and,如:148—one hundred and forty-eight ,406—four hundred and six。 1148

6.hundred(百),thousand(千),million(百万),billion(十亿)等前面即使有具体的数词,也不能在它们的后面加s。如:600—six hundred,8百万—eight million。

7.1000以上的数字,从后往前数每三位加一个逗号“,”第一个逗号前为千(thousand),第二个逗号前为百万(million),第三个逗号前为

billion(十亿)。英语中无“万”这个词,我们可以用“几十个千(thousand)”表示几万,“几百个千(thousand)”表示“几十万”。如:2,510=two thousand five hundred and ten;84,296=eighty-four thousand two hundred and ninety-six;274,350=two hundred and seventy-four thousand three hundred and fifty。

8.hundred,thousand,million用复数形式修饰名词时要用“of+复数名词”,如:数以百计的年轻人hundreds of young people;数以千计的书thousands of books。注意:hundreds of /thousands of/millions of +复数名词,其前面不能加具体的数词,但可加many/some。

hundreds of new buildings have sprung up here this year.

thousands upon thousands of people in south Africa are rising against their oppressors.

thousands and thousands of people come to visit the city every day.

millions of dollars have gone into the building of this factory.

(二)序数词——由基数词转变而来,表示“这是第n个”

1.口诀巧记基数词变序数词:“一、二、三,特殊记,八去“t”,九去“e”,“ve”要用“f”替,见“y”变成“i”和“e”,词尾加上“th”,若是遇到几十几,只变个位就可以。”第一、第二、第三分别:first,second,third,eight—eighth nine—ninth,five—fifth,twelve—twelfth,twenty—twentieth,forty—fortieth,twenty-five—twenty-fifth。

2其余情况均在基数词后加th。如: six—sixth, nineteen—nineteenth , hundred— hundredth, thousand—thousandth等。

3.序数词有时用缩写形式:

first----1st, twenty—second-------22th.

You may be in your twenties.

Past

二、基本用法

(一)基数词的基本用法

1.定语

fifty thousand london dockers are out on strike.

2.主语

数词作主语,谓语动词用单数。

如: two months is quite a long time.

five is an odd number.

3.宾语或介词宾语

how many do you want?

-----eight, please.

the city has a population of four million.

4.表语

we are altogether fourteen.

five plus seven is twelve.

5.同位语

what work are you to assign us three?

is there room for us two?

6.基数词+单数名词+形容词构成合成形容词。如:一个五岁的男孩a five-year-old boy is reading;

The boy is five years old.

一座800米长的桥an 800-metre-long bridge;

The length of the brige is 800 meters long.

The rive is 800 meters long/deep/wide/high

女子400米接力girls'400-metre relay race。

7.句型:主语+is +about(大约)/ over =more than(超过)/nearly(接近)+具体数词+metre(s)/kilometre(s)/kilo(s)long

/ high /tall /deep /away等。如:长江长6300公里。

the Yellow River is 6,300 kilometres long.

8.表示“。。。。。。十”的数词的复数形式可以用来表示人的岁数或年代:

twenty—twnties, fourty—forties

in one’s +。。

he is in his early thirties.

he died still in his forties.

this took place in the 1930s.

(二)序数词的基本用法

1.序数词主要用作定语,前面一般要加定冠词(或物主代词):

tom is their second son.

they celebrated the 10th anniversary of the founding of the republic.

i will never give up, not even on the 1,000th or 10,000th try.

2.有时前面可以加一个不定冠词来表示“再一”,“又一”这样的意思:

we’ll have to do it a second time.

shall i ask him a third time?

when i sat down, a fourth man rose to speak.

3.first,second 等有时可用来表示“第一个人(批)”“第二个人”等:

she was among the first to come and settle in dujiashan.

you will be the second to speak.

4.如果数字较长,序数词总避免使用,而且读的方法也常常简化:

第201房间:room 201 第319面、页:page 319 第一课:lesson one

第一页:page one 第一拖拉机厂:the number 1 tractor works

第六号车厢:carriage no.6

南京路1490号:1490 nanjing road

电话号码55――2347:telephone number : 55—2347

5. 在谈编了号的东西时,我们可以用基数词表示顺序:

the first part------part one

the third squad------squad three

the twenty-third section----section twenty-three

三、特殊数字的表示法

(一)年月日表示法

1. 年代年代前用 in.

( in ) 897 读作 ( in ) eight hundred and ninety-seven ( in ) 1961 读作 ( in ) nineteen sixty-one (或 in nineteen hundred and sixty-one)

( in ) 1905 读作(in ) nineteen and five

( in ) 1800 读作( in ) eighteen hundred

2. 月份月份开头第一个字母须大写,表示“在某月”时,月份前面用 in。下面月份后附有缩写式。

( in ) January Jan. ( in ) March Mar. ( in ) December Dec.

3. 日期用序数词(前需要加the)表示;“ 在某日”,前面用介词on.

( on ) the first ( on ) the eighteenth ( on ) the

thirty-second

4. 某年某月某日

in sep. 1954

on may 17, 1960 on Oct. 1, 1949(读作on October the first, nineteen forty-nine)

注:当年月日完全用数字表示时,美国人把月放在日前。 8,6,79在英国表示june the eighth (79年6月8日),但是在美国却表示august the sixth (79年8月6日)。

May 1

July 10th the tenth

(二)时刻表示法

1.英语通常用at所引导的表示时刻。如:

( at ) six or six o’clock

( at ) eight or eight o’clock

2.如说几点几分,用下面的方法

a)表示几点过几分,用介词past,但分数须在半小时以内包括半小时。

分+past+点如:

eleven past seven

a quarter past eight half past nine

b)表示几点差几分,用介词to,但分数需要在半小时以上不包括半小时。如:

eighteen to nine two to seven

a quarter to eight

注:上午可以用am表示,下午用pm表示,例如:

9.50am 11.05pm

(三)分数词表示法

1.分数词是以基数词和序数词合成的,基数词代表分子,序数词代表分母,除了分子是“1”的情况外,序数词都是用复数,(分子用基数词,分母用序数词,分子大于“1”,分母则加“s”)如:

分子= 1 若》1

分母序数词序数词+s

1/4 one-fourth 2/3 two-thirds 7/9 seven-ninths 5/12

five-twelfths

2.另外还有下面一些表示法:

1/2 (one) a half 1/4 a (one ) quarter 3/4 three-quarters

(四)小数的表示法

7.8 ------seven point eight

0.4---------zero point four

0.125----- zero point one two five

603.09---six hundred and three point oh nine

小数作定语时较多:

its total industrial output value was up 5.6 times in these years.

our grain output is now 2.4 times that of 1970.

(五)百分数的表示法

百分数由percent 表示,常常和by连用,作状语也可单独作状语:

its total output value increased by 11.5 percent over the previous year.

the output of cars in the u. s. last year was 24 percent less than in 1973.

有时用作定语宾语等:

the loss of metal has been reduced to less than 20%.

the march figure for output value registered a 37% increase over February.

(六)倍数的表示法:

一倍用once,两倍用 twice,两倍以上用基数词+times。如:5倍five times。

(七)一些数学公式的读法:

3+8=11 three plus eight is eleven. 9-7=2 nine minus seven is two.

a>b a is more than b.

(八)约数的表示法

⑴“多于”用more than 或over

this room can hold more than (=over) 500 people.这间屋子能容纳500多人。

⑵“少于”用less than

there are less than thirty balls in the basket.篮子里不到三十个球。

⑶“或……以上”用or more

the music hall can hold 7000 people or more.音乐厅能容纳7000人或7000人以上。 aged 65 or more。

⑷“或……以下”用or less

the house can hold 50 people or less. 这座房子可容纳50人或50人以下。

⑸“大约”用about, around, nearly等

the box weights about 50 pounds.这个箱子重约50磅。

⑹“左右”用or so

in the past ten years or so , they have changed a lot.在过去的十年左右的时间里,他们改变了许多。

动宾结构 hit me/ him/her/them

介宾结构 for me,buy a present for me/ him/her be good at doing sth

with, in on at for

物主代词:

形容词性物主代词,your his her their our+名词

名词性物主代词: mine, yours, hers, his ,theirs,ours my pen==mine.

is this your book? Yes, it’s mine.

is this yours?

指示代词

this 这个

that 那个

these这些

those那些

others 其他人的复数

some peopel 。。。。others。。。反身代词 myself

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