2024新版英语13.序数词

二、序数词序数词表示排列的顺序，简单说就是第一、第二、第三。它的缩写形式为数词加数词的最后两个字母，如：first—1st;second—2nd;third—3rd;thirty-first一31st。1.基数词变为序数词的规则1)第1至第19—般是在基数词后加th，如six-sixth；但变化特殊的有：one—first,two—second,three—third,eight—eighth,nine—ninth,five-fifth,twelve—twelfth。2）逢十的twenty,thirty...ninety,分别改y为iethtwenty—twentieth,ninety—ninetieth

3）表示第几十几或第几百几十几，只需将个位数改为序数词数字基数词序数词56fifty-sixfifty-sixth631sixhundredandthirty-onesixhundredandthirty-first2.序数词与冠词1）序数词前一般要加定冠词the。It'sthethirdtimeI'vebeenhere.这是我第三次来这里。MybirthdayisonthethirdofMay.我的生日在5月3日2）表示在原有的基础上增加，即“又一，再一”时，用不定冠词。ShallIaskherathirdtime?我还要问她一次吗？3）下列4种情况不用冠词①序数词前已有物主代词或名词所有格时，不能再用冠词ThisisTom'ssecondvisittoChina.这是汤姆第二次访问中国。②表示比赛或考试的名词时，通常省略定冠词Hewas（the）secondintheEnglishexam.在这次英语考试中他得了第二名。③序数词被用作副词时不用冠词lhavetofinishmyhomeworkfirst.我得先把作业完成好。④在某些习语中不用冠词atfirst起初firstofall首先atfirstsight乍一看学习小贴士：★其实基数词变序数词并不难，只要我们记住一些规律或口诀，如：123全要变，first,second,third；剩下要加th,不过8加h,9去e;ve结尾变f(th);ty结尾变tie(th);若你要数到20以上，只需变化个位数。★有些数字在变化时易混淆，—定要牢记这些特别容易混淆的词。four4

fourteen14

nine9

nineteen19forty40

fourth第四ninety90

ninth第九三、其他会用到数字的地方1.数学领域中的数字1）分数1/3one-third2/3two-thirds3/5three-fifths分数的表示方法其实也很简单，分子是基数词，而分母是序数词。而且，当分子是1时，分母就是序数词；而当分子大于1时，分母就要变成了序数词的复数，如：3/10—three-tenths。2）小数当我们遇到有小数点的数字时，只要把数字用基数词的方式读出，遇到小数点时加入单词“point"即可，如：3.14(threepointonefour)0.15(zeropointonefive)8.02(eightpointzerotwo)3）百分数这里要注意的是，百分数中最重要的是要读出百分号“percent”。5%fivepercent50%fifty

percentThirtypercentofthestudentsaregirls.学生中30%是女生。学习小贴士：百分比中无论多少，percent都不用复数哦！2.生活中常见数字1）温度我们一般讲摄氏度：...°C=...degree（s）centigrade10°C(tendegreescentigrade)-1°C(onedegreecentigradebelowzero)Thehightemperatureis20degreescentigrade,andthelowtemperatureis12degreescentigrade.最高气温20摄氏度，最低气温12摄氏度。2）价格人民帀

yuan币RMBthree

yuan

三元ten

yuan

十元美元dollar/英镑poundoneRMB/

yuan

—元/

onedollar—美元/

onepound—英镑twoRMB/yuan两元/

twodollars两美元/

twopounds两英镑学习小贴士：★yuan没有复数，而美元dollar和英镑pound都有。★问价格时一般用Howmuch...?—Howmuchisthehat?—这顶帽子多少钱？—20yuan.—20元。★形容一样东西价值多少，有时也用cost。Thescarfcosts50yuan.这条围巾50元。3）门牌号302室Room30212号No.122单元Unit23号楼BuildingNo.3南京路NanjingRoad徐汇区XuhuiDistrict用英语表达地址时和中文的表达习惯是不一样的，小的地址在前，大的地址在后：Room201,No.33,GuilinRoad,XuhuiDistrict徐汇区桂林路33号201室4）公共汽车号IwilltakeaNo.17bustothepark.我将坐17路汽车去公园。5）电话号码Mytelephonenumberis54923402.我的电话号码是54923402。6）年、月、日的表达①年a.—般情况下，将表示年份的四个数字按前后分为两组，读的时候先读前两位，再读后两位，每一组的数字都按基数词来读。1978——nineteenseventy-eight1998——nineteenninety-eightb.如果前两个数字为非“零"数字，后两位数分别为“零"，则先读出前两位数，然后将后面的两个“零"读为hundred。1800——eighteenhundredc.第三个数字为“零"（其他数字不是“零"）的年份的读法应当将该“零”读为O。例如：1806一eighteenosixd.关于千年的一些读法。2000年读作twothousand2008——twothousanandeight/twentyoeight1008——onethousandandeight/tenoeight2012——twentytwelve/twothousandandtwelve②月月份缩写月份缩写—月JanuaryJan.二月FebruaryFeb.三月MarchMar.四月AprilApr.五月MayMay六月JuneJun.七月JulyJul.八月AugustAug.九月SeptemberSept./Sep.十月OctoberOct.十一月NovemberNov.十二月DecemberDec.学习小贴士：★月份首字母必须大写：January,February...★如果月份要表示上旬、中旬和下旬则可用：earlyMay五月上旬mid-May五月中旬lateMay

五月下旬③日有两种比较常用的表达方法，一种较为详细和正式，一种比较简略。9月10日第一种：thetenthofSeptember第二种：September10th（读作：Septemberthetenth）TeachersDaycomesonSeptember10theveryyear.教师节是每年的9月10日。MybirthdayisonthetwelfthofJune.我的生日是6月12o7）时间①o'clock来表示整点，且可以省略eighto’clock8点钟ten（o’clock）10点钟Igetupatsixeverymorning.我每天早晨6点起床。②按分钟的顺序直接写出时间。Sixforty6点40

fiveten5点10分③如果分钟数少于30分钟，也就不到半点，可用分钟+past+钟点表示，其中past是介词，意思是“过了”twentypastfour4点20分（4点过了20分钟）eightpastone1点8分（1点过了8分钟）④正好半点halfpast...halfpastseven7点半halfpasteleven11点半⑤如果分钟数多于30分钟，也就是过了半点，可用（下一个整点差几分钟）+to+（下一个整点）表示，其中to是介词，意思是“差了”8:35twenty-fivetonine（下一个整点是9点，所以8:35其实就是9点差了25分钟）3:58twotofour（下一个整点是4点，所以3:58其实就是4点差了2分钟）⑥当分钟数是15分钟时，可用名词quarter(一刻钟)表示7:15aquarterpastseven12:15aquarterpasttwelve⑦若想表明是上午，可在时间后加上am或a.m.；若想表明是下午，可在时间后加上pm或p.m.6：00a.m.上午6点4：00p.m.下午4点学习小贴士：年、月、日和时间在使用时所跟的介词不同：Ittookplacein1978.事件发生在1978年。IliketogotravellinginSeptember.我喜欢在9月份去旅游。HewillcomebackonthefifthofMay.他将在5月5日回来。Iarrivedathalfpastseven.我七点半到那里。当然，如果是问当下的时间或者日期，不用加介词。——What'sthedatetoday?今天是什么日期？——It'sDecemberthefifth.12月5日。——Whatdayisittoday？今天是星期几？——It'sMonday.星期一——Whattimeisitnow？现在几点？——It's12o'clock.12点

练习答案一、按要求完成下表数字基数词序数词1524407812661285029991000012244202001

二、翻译短语和句子1.电话号码84361630______________________2.

11路公交车_______________3.

成百上千的鸟________________4.

成千上万的人_______________5.

两周半___________6.

第八层___________7.第三次___________8.三分之二___________9.第二十六中学___________10.十个月半___________11.12月25日___________12.8:36______________________13.在二十一世纪二十年代______________________14.步行十分钟的路程______________________15.第501房间______________________

三、选用词的适当形式填空1.

My

grandmother

is

______(70)years

old.2.

Amy

is

an

________(18)-year-old

girl.3.

——What

time

is

it?

——___________(4:55).4.

——What’s

the

date

today?

——It’s

April

______(twelve)5.

Sunday

is

the

______(one)

day

of

a

week.6.

Five

and

eight

is

_______(13).7.

Her

room

is

on

the

________(forty-six)

floor.8.

_______(hundred)

of

people

visit

this

museum

every

day.9.

Father’s

Day

is

on

the

______(three)

Sunday

of

June.10.

——Your

scarf

looks

very

beautiful.

——Thank

you.

I

want

to

buy

a______one.(two)

四、单项选择1.

There

are

some

______

in

our

classroom.A.

hundred

of

books

B.the

hundreds

of

booksC.

hundreds

of

books

D.hundreds

of

book2.

May

is

_______

of

a

year.A.

the

fifth

month

B.the

fifth

monthsC.hundreds

of

books

D.hundred

of

book3.

Is

Sunday

the

______

day

of

the

week?A.a

B.one

C.once

D.first4.

December

the

______

is

Christmas.A.twenty-five

B.twenty-fifth

C.twentieth-five

D.twenty-five

5.

The

new

student

is

in

______.A.Class

2

B.Class

Second

C.2

Class

D.class

26.

Ten

and

five

is

______.A.five

B.fifteen

C.fifty

D.fifth7.

My

brother

is

only

______

years

old.This

Sunday

is

his

_____

birthday.A.three;three

B.three;third

C.third;third

D.third;three8.

Please

open

your

book

and

turn

to

_________.A.Page

12

B.the

12nd

Page

C.page

12

D.page

the

12th9.

At

night

we

can

see

_____

stars

in

the

sky.A.

thousands

and

thousands

of

B.thousand

and

thousands

of

C.thousand

and

thousands

D.thousand

and

thousand10.

There

are

_____

students

in

our

school.A.

four-hundred

and

forty-five

B.four

hundred

and

forty-five

C.fourhundreds

and

forty-five

D.four

hundred

and

forty

five

11.

I

have

been

to

the

village

______.A.

a

hundred

time

B.hundred

times

C.hundreds

of

times

D.hundred

of

times12.

The

teacher

told

me

to

go

over

______

lessons.A.thirst

three

B.the

three

first

C.three

the

first

D.the

first

three13.

Mr

Smith

stayed

in

____

last

night.A.Room

403

B.the

Room

403

C.the

403

room

D.403

the

room14.

There

is

_____

English

book

on

the

table.A.a

B.an

C.one

D.the15.

He

said

he

was

going

to

be

free

in

______.A.

one

and

a

half

hour

B.one

hour

and

half

C.one

and

half

hours

D.an

hour

and

a

half16.

We

live

in

________.A.

the

twenty-first

century

B.the

century

twenty-oneC.century

twenty-one

D.the

century

twenty-first17.

The

road

is

______________.A.

two

thousand

and

five

hundred

metres

longB.

two

thousands

metres

longC.

longone

thousand

five

hundred

metreD.

a

thousand

and

five

hundreds

metres

long18.

March

the

______

is

Women’s

Day.A.eighth

B.ninth

C.tenth

D.eight19.Hejoinedthearmy

on

______

of

May

1980.A.1st

B.the

1

C.first

D.the

first20.

September

is

the

_______

month

of

the

year.A.nineth

B.ninth

C.nine

D.the

twelveth

参考答案一、按要求完成下表数字

基数词

序数词15

fifteen

fifteenth

24

twenty-four

twenty-fourth40

forty

fortieth78

seventy-eight

seventy-eighth12

twelve

twelfth66

sixty-six

sixty-sixth128

onehundredandtwenty-eight

onehundredandtwenty-eighth502

fivehundredandtwo

fivehundred

and

second999

ninehundreda