初一英语基数词和序数词全.docx
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初一英语基数词和序数词全
初一英语之 基数词与序数词
热身运动:
12个月份
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一、分类:
英语中数词主要分为基数词和序数词两类。
二、基数词:
表示数目的词称为基数词。
(1)基数词的构成法:
●1~12的基数是特殊的,必须牢记。
请写下来:
_________________________________
________________________________________________________________________
●13~19的基数是在3~9的基础上加上后缀-teen[‘ti:
n](音同“听”)构成的。
其中13,15,18是特殊的。
13——thirteen ;15——fifteen ;18——eighteen
●20~90的基数整数是在2~9的基础上加后缀-ty[ti](*音同“踢”)构成的。
其中20,30,40,50,80是特殊的。
20——twenty30——thirty 40——forty 50——fifty 80——eighty
●21~99的基数非整数是:
整数-个数 (当中要用连字符号“-”隔开 )
21——twenty-one 27——twenty-seven43——forty-three 59——fifty-nine
66——sixty-six88——eighty-eight 93——ninety-three 99——ninety-nine
●100~900的整百数是:
个数(1~9)+hundred(hundred“百”用单数)
100——one(或a)hundred300——threehundred 800——eighthundred
●101~999的非整数是:
个数(1~9)+hundred+and+整数-个数 (没有十位数,就直接用个位数)
101——one(或a)hundredand one 309——threehundredand nine
210——twohundredandten 413——four hundredandthirteen
540——fivehundredandforty 598——fivehundredandninety-eight
970——ninehundred andseventy 999——nine hundredandninety-nine
●1000以上的基数词在上面的基础上,再在前面加上个数(1~9)+thousand(thousand“千”用单数)
4,000——four thousand 9,000——ninethousand
1,001——onethousandand one2,008——two thousandandeight
3,015——three thousandand fifteen 4,040——four thousand andforty
5,069——fivethousandandsixty-nine 6,200——six thousand(and)two hundred 7,486——seventhousand fourhundredandeighty-six
★在英语里,数字(阿拉伯数字)通常从个位数起往左,每三个数用一个逗号隔开,而汉语习惯每四个数用逗号隔开(注意区别)
从左向右:
第一个逗号——用thousand千
第二个逗号——用million千万
第三个逗号——用billion亿
第四个逗号——用trillion万亿
50,000,000——fifty million
500,000,000——five hundredmillion
5,000,000,000——fivebillion
50,000,000,000——fiftybillion
练习:
25,025,874,953——twenty-fivebilliontwenty-five millioneighthundred andseventy-fourthousand ninehundred andfifty-three
(2)复数形式的基数词
They went tothetheatrein twosandthrees.他们三三两两地来到了剧院。
★表示人的不确切岁数或年代,用几十的复数形式表示。
He becameaprofessorinhisthirties.他三十多岁时成为了教授。
Shediedof lung cancerinher forties.她四十来岁时死于肺癌。
Itwasinthe1960s.那是在二十世纪六十年代。
三.序数词:
序数词是指表示顺序的数词
英语中基数词变序数词方法——口诀
口诀
解说
举例子
基变序,有规律,后面th加上去。
在数词后面加th。
four→ fourth
一二三,特殊记,后面字母t,d,d。
one,two,three特殊变。
first,second,third
八去t,九去e。
整数中的y要变成ie
eight去掉t,nine去掉e。
twenty去掉y变成twentieth
eight→eighth nine →ninth
f来把ve替。
five和twelve的ve要变成f 。
five→fifth twelve→ twelfth
若是遇到几十几,只变个位就可以。
两位数或两位以上数字只变个位。
thirty-three→thirty-third
序数词前要加the 我们一定要牢记。
序数词前必须加the(上述原则中的除外)
thefirstday
归类表格
(一)
基数词(数目/数量的多少)
序数词(顺序和等级)
1
one
1-12单独记忆
first
1-12单独记忆
2
two
second
3
three
third
4
four
fourth
5
five
fifth
6
six
sixth
7
seven
seventh
8
eight
eighth
9
nine
ninth
10
ten
temth
11
eleven
eleventh
12
twelve
twelfeth
13
thirteen
13-19尾加+teen
thirteenth
13-19尾+th
14
fourteen
fourteenth
15
fifteen
fifteenth
16
sixteen
sixteenth
17
seventeen
seventeenth
18
eighteen
eighteenth
19
nineteen
nineteenth
20
twenty
20-90(整数)尾+ty
twentieth
以ty结尾的数词,改y为i,+eth
30
thirty
thritieth
40
forty
forieth
50
fifty
fiftieth
60
sixty
sixtieth
70
seventy
seventieth
80
eighty
eightieth
90
ninety
ninetieth
100
hundred
hundredth
21
twenty-one
依此类推
twenty-first
基数-序数
36
thirty-six
thirty-sixth
四、写出下列基数词的序数词和它们的简写形式:
例如:
one first/1st eleveneleventh/11th
1. (基变序,有规律,第1,2,3,特殊记,词尾字母st nd rd)one___/__two____/__ three ___/__
twenty-one________/__ twenty-two ________/__
twenty-three________/__ thirty-one________/__
2. (8减t, 9减e,词尾再加th)
eight ___/__ nine___/_
twenty-eight________/__ twenty-nine________/__3.(第5和第12要注意,f来把ve替,词尾再加th)
five ___/__twelve_____/_twenty-five________/__
4.(整十基数要变序,要把ty变ie,词尾再加th
twenty_____/__thirty ______/_forty_____/_
fifty_____/__sixty______/__seventy______/_
eighty______/__ninety______/__
五,根据句子意思填空。
1.Children’sDay(儿童节)is onthe ____ ofJune(六月).
2.Thereare ____ months(月)inayear(年).
3.Teacher’s Day(教师节) isonthe ____ ofSeptember(九月).
4. Three plus(加)six is ______ .
六,选择填空。
( )1.Mycousin’s birthdayin on the ofOctober.
A.three B. first C.thesecond
( )2.Whatdateisittoday?
It’s ofApril.
A. twelfth B. the12th C.12th
( )3.There are daysin a week.
A. thesevenB.seventhC.theseventhD. seven
( )4.Sundayis the dayofaweek.
A. one B. first C. second
( )5. Twenty-eightminus(减)sixis .
A.thetwenty-second B.twenty-two C. twenty-second
( )6.Fourplus(加) is twelve.
A.seven B.eight C.nine
根据题意,填入合适的数词。
1、Sundayisthe( )dayof aweek.
2、Septemberisthe( )moth ofayear.
3、Octoberthe ( ) isNationalofayear.
4.Thereare_______________days inFebruary.
二、单项选择
1.-Howoldis yourson?
- _____. Wehadaspecial partyfor his_____birthday
lastSunday.ﻫ A. Nine;nine B.Nine;ninth
C.Ninth;ninthD.Ninth;nineﻫ2. Mrs. Turnerhave_____childtoday.ﻫ A.second B.thetwoﻫ C.a second D.thesecondﻫ3.Juneisthe_____monthoftheyear.
A.five B. sixﻫ C.seventhD.sixthﻫ4. The_____monthof ayearisDecember.ﻫA.two B. second C.twelveD. twelfth
5.-What'sthe datetoday?
ﻫ -It's_____ .ﻫ A. Maythe fourth B. May fourﻫC.theMayfourthD.fourthMay
6.Septemberisthe ________month(月份)ofthe year.
A.eighthB.ninthC.tenthD.eleventh
7、Thereare ________daysinFebruary.
A. thirty B.thirty-oneC.twenty-eightD. twenty-six
8. How manymonthsarethereinayear?
Thereare_______
A.elevenB. twelveC.twentyD.twelfth
9.TheChangjiangRiveris ________longestriverinChina.
A.thefirstB.the secondC.the thirdD.thefourth
10.Therearemonthsinayear,______ month isFebruary.
A.twelve;two B.twelve;second
C. twelve;the secondD.twelfth;thesecond
11.---Whenisyourbirthday,Jeff?
---Mybirthday.is______ .
A.Januarythe thirtieth B.Januarythirty
C. ThirtyofJanuary D.ThirtiethofJanuary
12.---Whattime isitnow?
---Itis
A.elevenand thirtyB.eleventhirty
C. thirtyeleven D.eleven—thirty
13.There areeightclassesinourgrade.I'min______.
A.GradeThree,ClassTwo B. Class Two,GradeThree
C.gradethree,classtwo D.class two,gradethree
14.In ourclass ofthestudents______ girls.
A.three-fifth;are B.three—fifth;is
C.three-fifths;areD.three-fifths;is
( )15.Mayis____ ofayear.
A. thefifthmonths B.thefifth month
C.the fivemonths D.thefivemonth
()16. ---Howmany English books are thereonthe table?
---There isonly _____Englishbookonit.
A.a B.an C.oneD.the
( )17.IsSundaythe ____ dayoftheweek?
A.a B.one C.once D.first
( )18.Marchthe_____is Women’s Day.
A.eighth B. ninth C.tenth D.eight
( )19.Septemberis the_____monthof theyear.
A. nineth B.ninth C. nine D.thetwelveth
( )20.Decemberthe____isChristmas.
A.twenty-five B. twenty-fifth
C. twentieth-five D.twenty-five
()16.-What timeisitnow?
–It’s __________.
A.No.6 B.sixten o’clockC.halfpastsix