(完整word版)小学英语数词讲解与练习
(完整版)小升初英语数词专项讲解及练习
数词一、数词的种类数词分基数词和序数词基数词是表示自然数列的词, 例如; one、two、three、four….. 序数词是表示先后顺序的词, 例如: first、second、third、fourth…二基数词和序数词的表示法1．基数词单词的拼写：1~12为单词 one two three four five six seven eight nine ten eleven twelve13~19都以后缀-teen结尾，20至90这样的整十数都以后缀-ty结尾，其他基数词中间加连字符号“-”再按照上述的变化进行。
例：21→twenty-one56→fifty-six 85→eighty-five三位数的构成为：几+百+and+末两位（或末一位）数例：132→one hundred and thirty-two205→two hundred and five千以上的数字的读法：从后面往前，每三位数作为一个单位，分别为thousand、million.32、548、652、读作：1.thirty two million2.five hundred and fortyeight thousand3.six hundred and fifty two2.序数词=基数词+th (1、2、3为 first、second、third)。
数词分基数词和序数词但以下几种情况要注意：1) fifth (第五)、 eighth (第八)、ninth (第九)、twelfth(第十二）2) 以ty结尾的基数词变词尾为tieth例：twenty→twentiethninety→ninetieth序数词表示十位与个位数时，十位与个位之间用“—”3)复合序数词只需要将相应基数词中最后一位变成序数词，其余不变。
例：第二十一→twenty-first第二百四十五→two hundred andforty-fifth三基数词序数词的用法1. hundred、thousand、million 与数字连用，表示一定量的具体数字，不用复数，但表示不定概念可用复数例：three hundred peoplemillions of people2. 基数词表示时刻。
(完整word版)小学英语数词讲解与练习
数词数词是表示数量多少或序次先后的词。
分为基数词和序数词。
（一）基数词1.表示数量多少的词是基数词，如： one, two, three等。
2.数词的构成1）从 1－12 分别由从 one 到 twelve， 12 个各不一样样的词表示。
one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve2）从 13－ 19 均今后缀 -teen 结尾。
thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen3）从 20－ 90 的整十数词均今后缀 -ty 结尾。
表示“几十几”时，个位和十位之间需加连字符。
twenty, thirty, forty, fifty, sixty, seventy, eighty, ninety21 twenty-one32thirty-two43 forty-three4）整百数由 1— 9 加 hundred 构成。
100 one (a) hundred500 five hundred5)整百数和整十数之间由 and 连接，十位与个位之间要加连字符“-”。
若是十位数为零，那就在百位和个位之间用 and 连接。
101 one hundred and two245 two hundred and forty- five6）千 thousand 百万 million十亿 billionExercise:写出以下数字12142040901940060035783056782、序数词序数词表示排列序次，如first, second, third 等。
构成规则：1)序数词第一、第二和第三为 first, second 和 third, 其他序数词的构成是在基数词后加 th。
比方：six→ sixth seven→ seventh ten→ tenth four→ fourth2) fifth( 第五 )、 eigth (第八 )、 ninth ( 第九 )和 twelfth ( 第十二 )在拼法上有变化。
完整版)小升初英语数词专项讲解及练习
完整版)小升初英语数词专项讲解及练习数词一、数词的种类数词分为基数词和序数词。
基数词表示自然数列，例如：one、two、three、four… 序数词表示先后顺序，例如：first、second、third、fourth…二、基数词和序数词的表示法1.基数词单词的拼写：1~12为单词：one。
two。
three。
four。
five。
six。
seven。
eight。
nine。
ten。
eleven。
twelve.13~19都以后缀-XXX结尾。
20至90这样的整十数都以后缀-ty结尾。
其他基数词中间加连字符号“-”，再按照上述的变化进行。
例如：21 → twenty-one。
56 → fifty-six。
85 → eighty-five。
2.三位数的构成为：几 + 百 + and + 末两位（或末一位）数。
例如：132 → one hundred and o。
205 → two hundred and five。
千以上的数字的读法：从后面往前，每三位数作为一个单位，分别为thousand、n。
32,548,652，读作：1.o n。
2.five hundred and forty-eight thousand。
3.six hundred and o.序数词=基数词+th（1、2、3为first、second、third）。
但以下几种情况要注意：1.fifth（第五）、XXX（第八）、ninth（第九）、XXX（第十二）。
2.以ty结尾的基数词变词尾为XXX。
例如：XXX → XXX。
XXX → XXX。
3.序数词表示十位与个位数时，十位与个位之间用“-”。
4.复合序数词只需要将相应基数词中最后一位变成序数词，其余不变。
例如：第二十一→ XXX-first。
第二百四十五→ two hundred and forty-fifth。
三、基数词序数词的用法1.hundred、thousand、n与数字连用，表示一定量的具体数字，不用复数，但表示不定概念可用复数。
(完整word版)英语数字表达法大全
0 nought;zero;101 one hundred and one 156 one hundred and fifty-six 192 one hundred and ninty-two1,000 one thousand1,001 one thousand and one1,300 thirteen hundred（美式读音）; one thousand three hundred（英式读音；千和百之间不用and）2,000 two thousand 2,034 two thousand and thirty-four6,502 six thousand five hundred and two 38,000 thirty-eight thousand45,672 forty-five thousand six hundred and seventy-two500,000 five hundred thousand1,000,000 one million3,123,400 three million, one hundred and twenty-three thousand and four hundred8,000,000 eight million47,000,000 forty-seven million900,000,000 nine hundred million1,000,000,000 a milliard, one milliard(美作:a billion, one billion)1,050,000,000 one billion and fifty million10,000,000,000 ten billion200,000,000,000 two hundred billion1,000,000,000,000 a trillion, one trillion6,000,000,000,000 six million million序数词first第一second第二third第三fourth第四fifth第五sixth第六seventh第七eighth第八ninth第九tenth第十eleventh第十一twelfth 第十二thirteenth第十三fourteenth第十四fifteenth第十五sixteenth第十六seventeenth第十七eighteenth第十八nineteenth第十九twentieth第二十twenty-first第二十一twenty-second第二十二twenty-third第二十三thirtieth第三十thirty-first第三十一fortieth第四十fiftieth第五十sixtieth第六十seventieth第七十eightieth第八十ninetieth第九十(one)hundredth第一百(one)hundred and first第一百零一hundred and thirty-fourth第一百三十四two-hundredth第二百three-hundredth第三百four-hundredth第四百five-hundredth第五百six-hundredth第六百seven-hundredth第七百eight-hundredth第八百nine-hundredth第九百(one)thousandth第一千thousand and first第一千零一two thousand and thirty-fourth第二千零三十四ten thousandth第一万(one)millionth第一百万(美作:billionth)billionth第十亿(美作:trillionth)分数1/2 : one-half; a half1/3 : one-third3/4 : three-fourths1/5 : one-fifth2/5 : two-fifths7/8 : seven-eighths1/10 : one-tenth; a tenth1/100 : one-hundredth; one per cent1/1000 : one-thousandth1/10000 : one ten-thousandth2‘ 1/2:two and one half; two and a half4’ 2/3:four and two-thirds100% : one hundred per cent0.5% : point five per cent0.46% : point four six per cent2.05 : two point nought five;two point O five6.003 : six point nought nought three;six point O O three78.12 : seventy-eight point one two119 : one one nine120 : one two oh688 : six double-eight5337 : five double-three seven6512 : six five one two97868 : nine seven eight six eight893493 : eight nine three four nine three737964 : seven three seven nine six four62374881 : six two three seven four double-eight one1840 eighteen forty1900 nineteen hundred1992 nineteen ninety-two数字表达类基本要求一、数字表达类（Numbers）研究生入学考试听力试题中第一部分为填充表格，其中很大一部分是根据所听内容填写诸如数字、时间和地点等具体信息。
(完整版)英语数词语法练习
1.—What’s the time， please?—It’s _______.A。
nine thirty-five B。
forty—eight past sixC.fifty-five to fourD.thirty-one two2。
January is _______ month of the year.A.oneB.the oneC。
first D.the first3。
There are _______ days in a year。
A.three hundreds sixty-five B。
three hundred and sixty—fiveC。
the third hundred sixty-five D. third hundred and sixty—five4.The computer was cheap. I spent only two _______ yuan on it.A。
thousands B.thousandC。
thousands of D。
thousand of5.Please look at the following four pictures and write a _______ story about them.A。
one—hundred-word B.one—hundred—wordsC.one-hundreds-word D。
one-hundreds-words6.—On which floor do you live?—The _______ floor, and my room number is _______。
A.fifth； five zero two B。
fifth; five zero secondC.five； five zero second D。
five； five zero two7.In our city _______ people have moved into their new houses。
【英语】全面完整的英语数词知识
基数词：表示数量的数词叫基数词序数词：表示顺序的数词叫序数词We have one, two and three bedroom apartments. 我们有一室、两室和三室的公寓。
（基数词）The first, second and third prizes went to James, Lytton and Tom respectively. 詹姆斯、利顿和汤姆分别获一、二、三等奖。
（序数词）基数词【1-10】one two three four five six seven eight nine ten【11-20】eleven twelve thirteen fourteen fifteen sixteen seventeen eighteen nineteen twenty【21-30】twenty-one twenty-two twenty-three twenty-four twenty-five twenty-six twenty-seven twenty-eight twenty-nine thirty【31-40】thirty-one thirty-two thirty-three thirty-four thirty-five thirty-six thirty-seven thirty-eight thirty-nine forty【41-50】forty-one forty-two forty-three forty-four forty-five forty-six forty-seven forty-eight forty-nine fifty【51-60】fifty-one fifty-two fifty-three fifty-four fifty-five fifty-six fifty-seven fifty-eight fifty-nine sixty【61-70】sixty-one sixty-two sixty-three sixty-four sixty-five sixty-six sixty-seven sixty-eight sixty-nine seventy【71-80】seventy-one seventy-two seventy-three seventy-four seventy-five seventy-six seventy-seven seventy-eight seventy-nine eighty【81-90】eighty-one eighty-two eighty-three eighty-four eighty-five eighty-six eighty-seven eighty-eight eighty-nine ninety【91-100】ninety-one ninety-two ninety-three ninety-four ninety-five ninety-six ninety-seven ninety-eight ninety-nine one hundred【千】thousand【万】ten thousand【十万】one hundred thousand【百万】million【千万】ten million【亿】one hundred million【十亿】one thousand million（英）/billion（美）【百亿】ten thousand million/ten billion英语中是按照三个零来计算量级的，如1,000是one thousand1,000,000是one million1,000,000,000是one billion10,000就是“十个1000”即ten thousand, 同理1,000,000是one million10,000,000是ten million100,000,000是one hundred million第一个逗号前的数为thousand（千），第二个逗号前的数为million（百万），第三个逗号前的数为billion（十亿），如8,456-eight thousand, four hundred and fifty-six36,789-thirty-six thousand, seven hundred and eighty-nine30,345,130-thirty million, three hundred and forty-five thousand, one hundred and thirty23,456,342,456-twenty-three billion, four hundred and fifty-six million, three hundred and forty-two thousand, four hundred and fifty-six表示确切的数字时，billion, million, thousand, hundred不能用复数形式，但表示约数时，如成百上千、成千上万等，要用复数形式，且与of连用，如hundreds ofthousands of表示人的不确切年龄或年代，用几十的复数形式表示，如in one's twenties/thirties 在某人二十/三十几岁时the 1840's/the 1840s 19世纪40年代可用“名词＋基数词”表示顺序，名词和基数词的第一个字母要大写，名词前不用冠词，如Open your books and let's study Lesson Two. 打开你们的书本，我们来学习第二课。
【数词】小初英语衔接 知识精讲+即学即练(通用版 含答案)
专题13数词小初衔接精讲精练（通用版）知识精讲一、定义表示数目多少或顺序多少的词叫数词。
数词分为基数词和序数词。
表示数目多少的数词叫基数词；表示顺序的数词叫序数词。
二、基数词•1-10one two three four five six seven eight nine ten•11-19eleven twelve thirteen fourteen fifteen sixteen seventeen eighteen nineteen •整十•大数三、序数词1. 助记口诀一、二、三，特殊记，加th从4起，八少“t”，九去“e”，“ve”要用“f”替，(five, twelve)见“y”变成“i”和“e”，词尾加上“th”，(twenty, thirty,---ninety)若是遇到几十几，只变个位就可以。
2. 序数词举例即学即练考试时间：40分钟满分：70分一、单选题（共41题；共41分）1.I eat vegetables twice a day. __________________ times a week.A.2B.7C.142.There _______ four bedrooms and a study on the _____ floor.A.are; secondB.is; secondC.are; two3.Tom is ______ years old. He is the ______ English pupil in our class.A.seven; sevenB.seven; seventhC.seventh; seven4.— Which room are you living in?— In _________________ on _________________ floor.A.Room 303, the twoB.303 Room, twoC.Room 303, the secondD.303 Room, second5.Four years ago, you became my____________maths teacher.A.firstB.oneC.16.Our school is very big. There are about _______________ students.A.one thousandB.one hundredC.a lot of7.Daming is playing the suona for the ________ time.A.threeB.twoC.third8.In the ________ photo, I am ________ the room.A.three; cleaningB.third; cleaningC.third; clean9.The meat is three ________ and fifty ________.A.dollars; centsB.dollar; centC.yuan; cents10.This city has got seven ________ people.lionlionslions of11.I think ten hundred is a ______ .A.thousandlionC.kilometre12.There are _______ students in this row(排). I'm the _______ one.A.six; fiveB.fifth; fourthC.six; fifth13.There're ______________ months in a year. September is the ______________ month of the year.A.twelve; ninthB.twelfth; nineC.twelve; nine14.August is the _______ month of the year.A.sixthB.eighthC.ninth15.My birthday is April _______.A.22thB.22stC.22nd16.Ann was fourth; Cathy came after Ann; Cathy was _______.A.fifthB.thirdst17.Four children had a race. Kate was last. She was _______.A.firstB.thirdC.fourth18.Today is my birthday.A.ninethB.nineC.ninth19.The lesson is very difficult in this book.A.fiveB.fifthC.fivethbs are on the________ floor.A.firstB.ninthC.sixth21.Jenny came _____ in the game.A.oneB.secondC.firstly22.Look at that book. There are ________ words in it.A.three hundredB.three hundredsC.three thousandstall. He is than this desk.A.meter; tallB.meters; tallC.meters; taller24.There are ________ girls in our school.A.nine hundredsB.nine hundred forty oneC.nine hundred and forty-one25.The Olympic Games take place every _________years.A.threeB.fourC.five26.I am 50 kilograms. My brother is 55 kilograms. He is _________ than me.A.5kg heavierB.5kg thinnerC.5cm taller27.Take the medicine ____________ a day.A.twoB.three timesC.third28.The gym is on the floor.A.twoB.secondC.three29.Thanksgiving is held on the ________ Monday in October.A.twoB.twiceC.second30.You should brush your teeth____a day.A.twoB.twiceC.second31.Four plus(加)_________is twelve.A.sevenB.eightC.nine32.My cousin's birthday in on the _________of October.A.threeB.firstC.two33.Monday is the __________day of the week.A.firstB.secondC.third34.—How much is it ?—It is ______.A.thirteen dollar and one centsB.thirteen dollars and one centsC.thirteen dollars and one cent35.—Which floor do you ?—The floor.A.live; ninethB.live on; ninthC.live on; ninethD.live; ninth36.More than ________ VIPs will come to Beijing for the Olympic Games.A.eight hundredsB.eight hundredC.eight hundred ofD.eight hundreds of37.There are________ stars in the sky, but some of them are too far to be seen.A.thousandsB.thousands ofC.thousand ofD.several thousand38.Mother's Day is on the Sunday in May．A.twoB.secondC.third39.My mother goes shopping________ a week.A.firstB.oneC.once40.There are______minutes in an hour.A.sixtyB.twelveC.twenty-four41.—When is National Day?—It is on _____.A.June 1stB.October 1stC.September 1st二、用所给词适当形式填空（共8题；共9分）42.Our classroom is on the ________ (three) floor.43.The ________ (two) and the ________ (one) peas want to fly to the sun.44.I live on the________ (nine) floor of the building.45.Our classroom is on the ________ (five) floor.46.Look at the two ________ (picture) on the blackboard.47.I'm always excited on the ________ (one) day of school.48.I have three________ (pen friend) from the US.49.It is more than two________ （thousand）years old.三、单词拼写（共1题；共20分）50.写出下列基数词的序数词及其缩写形式。
(完整版)数词练习题
(完整版)数词练习题1．I have to write ________ letter this evening.A．another B．much C．two more D．another two2．In our class ________ of the students ________ girls.A．third fifths; is B．three fifths; are C．three fifth; is D．third fifth; are3．—What’s four and three?—It’s ________.A．seven B．eight C．nine D．zero4．—There are so many people on the playground watching the flag rise.—Two ________ them are from the villages and towns.A．thousands B．thousands of C．thousand of5．—How old is your daughter?—_________. We had a party for her _________ birthday last Saturday. A．Twelve; twelfth B．Twelfth; twelve C．Twelve; twelve6．The boy is only ________ . Today is his ________ birthday.A．five; fifth B．fifth; five C．five; five7．I have ________ rulers. Two are white and three are yellow.A．three B．five C．seven D．eight8．More than seven ________ tourists travelled to foreign countries during the National Day Holiday and ________ more will go abroad next year.A．million; million B．millions; millions C．million; millions D．millions; million9．There are ________ days a week and Tuesday is the ________ day of a week. A．seven; third B．seven; three C．seventh; third D．seventh; three10．—Is Mike’s birthday ________ January?— Yes. That’ll be his ________ birthday.A．to; twelfth B．in; twelfth C．at; twelve D．on; twelve11．—The robots on show yesterday were in ________ shapes.—Wow, it was fantastic.A．hundred B．hundreds C．hundred of D．hundreds of12．Each of us has to write a _________ report every two weeks.A．two-hundred-word B．two-hundreds-word C．two-hundreds-words D．two-hundred-words13．Football is so exciting that ________ people in the world play it.A．million of B．two million C．two million of D．two millions of14．Twenty eight and twelve ________.A．are fourty B．is forty C．is fourty D．are forty15．How do you read the number 6, 425, 200 correctly?A．Six million four hundred and twenty-five thousand two hundred.B．Six millions four hundreds and twenty-five thousands two hundreds.C．Six million and four hundred and twenty-five thousand and two hundred. D．Six millions four hundred and twenty-five hundred and two hundred.16．It is reported that nearly ________ foreign kids joined a British boarding school last year, and a third of them came from China.A．nine thousand B．nine thousands C．nine thousand of D．nine thousands of17．During the seven-day May Day holiday, ________ visitors came to this city. A．millions B．million of C．millions of18．You can see ________ photos. My mother is in the ________ photo. A．two; one B．two; two C．two; first19．Your mum looks young and beautiful. It’s hard to imagine she is already in her ________.A．fifties B．fifty C．fiftieths D．fiftieth20．—When is your sister’s birthday?—It’s August ________.A．twelve B．twelveth C．the twelfth D．the twelveth21．—Which month is ________ month of a year?— _________.A．fifth, May B．the fifth, May C．fiveth, March D．the fivety, March22．There are ________ months in a year.A．twenty B．twelve C．twelfth D．twentieth23．Teacher’s Day is on ________ day of September.A．ten B．the tenth C．tenth D．tened24．The winner of this singing competition is an _________ boy from Nanjing. A．eighteen year old B．eighteen years old C．eighteen-year-old D．eighteen-years-old25．We walked for ________ two hours before we ________ the top.A．other; reached B．others; arrived at C．another; got to D．the other; arrived in26．—What do you think of the passages in your exam?—Oh, I think ________ of the materials I read in the exam ________ easy.A．two thirds, is B．two thirds, are C．two third, are27．She will be 180 centimeters _________ when he is 24 years old.A．tall B．taller C．heavy D．heavier28．If A=3 and B=7, what’s the answer to the problem: A＋B－2 = ? The answer is _________.A．twelve B．ten C．nine D．eight29．The movie is so interesting that people have seen it in the past fewdays.A．thousands of B．two thousandsC．two thousand of D．two thousands of30．________ July 23, People all over our country will warmly celebrate ________ anniversary (周年) of the founding of the Communist Party of China (中国共产党). A．In; 100th B．On;100th C．On; the 100th D．In; the 100th31．The man writes ________ beautiful stories for children.A．hundred of B．six hundreds C．six hundreds of D．hundreds of32．Mr. Miller is forty years old and he has a ________ daughter.A．five year’s old B．five years old C．five-year-old D．five-years-old33．— Ms. Li, nearly ________ of the students in our class went to see the movie last night.— Great. ________ anyone want to share your opinion on the movie?A．three quarters; Is B．three quarters; DoesC．third quarters; Is D．third quarters; Does34．The number of the students in our school ________ about 800. ________ of them are boys.A．are; Two third B．are; Two thirdsC．is; Two third D．is; Two thirds35．Mr Li ________ his students to write ________ 2 articles before the monthly test.A．made, the other B．required, other C．made, another D．required, another36．The reading room is on ________ floor. You need to go upstairs.A．fourth B．the four C．four D．the fourth37．It’s a very new city. In fact, it only became important ________.A．in the 1980 B．in the 1980s C．in 1980s D．in a 1980s38．My ________ birthday is on Friday. I want to invite（邀请）________ friends to my birthday party.A．thirteenth; twenty B．thirteen; twenty C．thirteen; twentieth39．There will be a big sale in the Moon Store. All the things below will be 30% off. According to the table, Tom will pay＄________ if he buys each kind of the fruit one kilo.A．＄8. 4 B．＄9. 8 C．＄7. 3540．— ________ is the population of China now, Jack?— Let me think for a moment. It is about ________.A．How many; 1,400 million B．What; 1,400 millionC．What; 40 million D．How many; 140 million41．Mike is twenty years old. Today is his ________ birthday.A．twenty B．twentieth C．twenties42．There are ________ minutes in an hour.A．fifty B．sixty C．seventy D．eighty43．There are ________ minutes in an hour.A．sixty B．seventy C．sixteen D．eighty44．Forty and ________ is ninety.A．fifty B．forty C．sixty D．eighty45．There are __________ in the sky at night when the weather is fine. A．million stars B．million of stars C．millions of stars D．millions of star46．—How do you say 153,009?—________A．One hundred fifty-three thousand and nine B．One hundred and fifty-threethousand and nineC．One hundred and fifty-three thousand nine D．One hundred and fifty-three thousands and nine47．The shoe store is on the ________ floor and I buy ________ pairs of shoes in it. A．two; two B．two; second C．second; second D．second; two48．My brother spends ________ of his money buying books every year.A．two fifths B．two fifth C．second fifths D．one fifths49．—What time do you usually get up?—I usually get up at ________ in the morning.A．forty past six B．half to six C．half past six50．In Xinhua Middle School, students in Grade 7 ________ 4 classes in the morning and ________ class finishes at 11:20.A．have, four B．has, fourth C．have, the fourth D．has, a fourth。
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数词数词是表示数量多少或顺序先后的词。
分为基数词和序数词。
（一）基数词1. 表示数量多少的词是基数词，如：one, two, three等。
2. 数词的构成1）从1－12分别由从one到twelve，12个各不相同的词表示。
one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve2）从13－19均以后缀-teen结尾。
thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen3）从20－90的整十数词均以后缀-ty结尾。
表示“几十几”时，个位和十位之间需加连字符。
twenty, thirty, forty, fifty, sixty, seventy, eighty, ninety21 twenty-one 32 thirty-two 43 forty-three4）整百数由1—9加hundred构成。
100 one (a) hundred 500 five hundred5) 整百数和整十数之间由and连接，十位与个位之间要加连字符“-”。
如果十位数为零，那就在百位和个位之间用and连接。
101 one hundred and two 245 two hundred and forty- five6）千thousand 百万million 十亿billionExercise:写出下列数字12 14 2040 90 19400 60035 78305 6782、序数词序数词表示排列顺序，如first, second, third等。
构成规则：1) 序数词第一、第二和第三为first, second和third,其他序数词的构成是在基数词后加th。
例如：six → sixth seven → seventh ten → tenth four → fourth2) fifth(第五)、eigth (第八)、ninth (第九)和twelfth (第十二)在拼法上有变化。
first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth, twelfth, thirteenth, fourteenth, fifteenth, sixteenth, seventeenth, eighteenth, nineteenth3) 二十、三十等基数词变为序数词时,要把y变成ie再加-th。
例如：twenty→twentieth forty→fortiethtwentieth, thirtieth, fortieth, fiftieth, sixtieth, seventieth, eightieth, ninetieth4) 基数词几十几变成序数词时,表示几十的数词不变,只把表示几的基数词变成序数词。
例如：twenty-one → twenty-first forty-five → forty-fifth5) 第一百、第一千、第一百万、第十亿都是在基数词后直接加th构成。
例如：第一百→hundredth第一千→thousandth第一百万→millionth第十亿→billionth6）.序数词的缩略形式是由阿拉伯数字加序数词的最后两个字母构成。
例如：1st, 2nd, 3rd, 4th, 21st, 32nd, 40th7) 序数词前必须加定冠词theThe first time I came to China, I liked it very much.我第一次来中国，我就非常喜欢这个国家。
The first is always better than the second.第一总是比第二好。
She will choose the third. 她将选择第三。
Exercise:把下列基数词改成序数词。
one two threefive nine eightfourteen twenty thirty-five3. 数词的应用1）时刻的表示法A、表示几点钟用基数词加可以省略的o'clock5:00 读作five o'clock 或fiveB、半点的表示法表示半点钟时，用“钟点数+ thirty”或“half+ past +钟点数”表示2: 30 two thirty / half past two8:30 eighty thirty / half past eightyC、“几点几分”的表示法（1）用“钟点数+分钟数”表示7：10 seven ten 9：40 nine forty（2）分钟数在30分钟以内的，用“分钟数+ past +钟点数”表示，意为“几点过几分“7：10 ten past seven 10:15 fifteen past ten / a quarter past ten（3）分钟数超过30分钟的，用“（60-分钟数）+ to +下一个钟点数”表示，意为“差几分到几点”10:40 twenty to eleven 2 : 45 fifteen to three / a quarter to threeExercise: 用英语表示下列时间10: 05 8: 3012:10 1:155:47 9:233:51 11:496:00 7:222) 编号的表示法编号既可以用序数词,也可用基数词。
the tenth lesson Lesson Ten 第十课the fiftieth page page 50第五十页有的编号习惯上常用基数词。
例如：Room 321(读作three two one) 321号房间Tel.No.4013586(读作Telephone number four 0 one three five eight six)电话号码40135863）年、月、日的表示法英语中表示日期的顺序通常为月日年或日月年。
1、月、日的表示法“月”用英语中表示月份的名词，“日”用基数词或序数词表示都可以。
7月8日July 8(July eight) / July 8th ( July the eighth)10月1日October 1 ( October one) / October 1st ( October the first)2、年的表示法1983→nineteen eighty-three1700→seventeen hundred1870→eighteen seventy2008→two thousand and eight1601→sixteen and one或sixteen hundred and one965→nine sixty-five3、年、月、日的表示法1986年9月1日September 1st, 1986 / 1st September, 19862011年8月8日August 8, 2011 / 8th August, 2011Exercise:用英语表示下列日期11月1号2月10号5月22号9月17号10月3号12月19号四、课堂练习1）根据括号中的数字填写合适的序数词或基数词（写单词）。
1、Bill is （14）years old , he is in Class （2）Grade （6）.2、My birthday is on the （3）of March .3、September is the （9）month in a year .4、Which boy is thinner , the （1）one or the （2）one ?5、There are （55）students in our class .2）单项选择( )1．There are ___________ days in a year．A．three hundred and sixty five B．three hundred and sixty-fiveC．three hundreds and sixty five D．three hundreds and sixty—five( )2．Danny lives in __________．A．room 404 B．Room 404 C．404 room D．404 Room( )3．Jim is in __________．A．class one，grade six B．grade one，class sixC．Class One，Grade Six D．Grade One, Class Six( )4．The bike cost me _________ yuan．A．five hundred forty B．five hundreds fourtyC．five hundred and forty D．five hundred fourty( )5．My telephone number is ____________．A．eighty eight two forty four zero nineB．eight eight two double four O nineC．eighty eight two forty-four zero nineD．eight eight two four four zero nine( )6．Is there any food for us _________?A．ten B．tenth C．the tenth D．the ten( )7．Mary is _________ girl．A. an 8 year old B．8一years—oldC．the 8 years old D．an 8一year—old( )8．—What day is today? — ___________A．June B．TuesdayC．It is hot D．It’s fine( )9．—What’s the date today?— ___________A．It’s Saturday B．It’s July C．It’s fine D．It’s JuIy 15( )10．—What time do you get up every day?A．It’s seven o’clock B．Seven o’clock timeC．At seven D．On seven五课后作业1．There are ___________ days in a year．A．three hundred and sixty five B．three hundred and sixty-five C．three hundreds and sixty five D．three hundreds and sixty—five ( )2．Danny lives in __________．A．room 404 B．Room 404 C．404 room D．404 Room( )3．Jim is in __________．A．class one，grade six B．grade one，class sixC．Class One，Grade Six D．Grade One Class Six( )4．The bike cost me _________ yuan．A．five hundred forty B．five hundreds fourtyC．five hundred and forty D．five hundred fourty( )5．My telephone number is ____________．A．eighty eight two forty four zero nineB．eight eight two double four O nineC．eighty eight two forty-four zero nineD．eight eight two four four zero nine( )6．Is there any food for us _________?A．ten B．tenth C．the tenth D．the ten( )7．Mary is _________ girl．A. an 8 year old B．8一years—oldC．the 8 years old D．an 8一year—old( )8．—What day is today? — ___________A．June B．Tuesday C．It is hot D．It’s fine( )9．—What’s the date today? — ___________A．It’s Saturday B．It’s July C．It’s fine D．It’s JuIy 15( )10．—What time do you get up every day?A．It’s seven o’clock B．Seven o’clock timeC．At seven D．On seven。