1、【名師點睛】一、基數詞用于表示事物數量的詞，叫基數詞。如：two bridges 兩座橋，twenty soldiers 20個戰士。1.基數詞的詞形(1)從 1 到 12 是獨立的數詞：one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve。(2)從 13 到 19：在個位數后-teen。thirteen, fifteen, eighteen, nineteen(3)從20到90的各整十位數都以-ty結尾。twenty, thirty, fifty, eighty, ninety(4)20到100之間

2、的其余的兩位數，要在十位和個位之間加連字符號“-” 。twenty-five, thirty-two, ninety-eight(5)百位以上的數詞，要在百位和十位(沒有十位則和個位)之間加and。101：one hundred and one 258：two hundred and fifty-eight(6)英語中的數詞每3位數一個單位 hundred，thousand 千，million百萬 ,billon十億從個位向前，每三位加一個“，”；第一個“，”號前是thousand(千) ，第二個“，”前是million(百萬)。4，002：four thousand and two7，059

3、：seven thousand and fifty nine95，680：ninety five thousand, six hundred and eighty(7) hundred, thousand, million的用法hundred, thousand, million在任何具體數字之前，都要用單數形式。但如果其后有of，則要用復數形式(其前面不能再加具體數目)。例如：two million 200萬millions of 數百萬thousands of 成千上萬Thousands and thousands of visitors have come to Beijing in t

4、he last two months.在過去的兩個月里有成千上萬的來訪者到過北京。注：有數詞就沒有s,有s 就有of.2. 基數詞的讀法用逗號把長數字從右向左三位三位地分開，如12，000.讀數時，從左向右三位三位地按照三位數讀法讀，遇上逗號就分別加上該逗號所表示的數詞。例如：43，982，567forty-there million, nine hundred and eighty-two thousand, five hundred and sixty-seven3. 基數詞的用法 基數詞在句子中可以作主語、賓語、定語、表語和同位語。Two of them are workers from

5、 China. 他們之中有兩名是來自中國的勞工。(作主語)-How many pieces of bread do you want? -I want two. -你要幾片面包?我要兩片。(作賓語)-Three times five is fifteen. 3乘5等于15。(作表語)His daughter is only five. 他的女兒只有5歲。(作表語)The four students didn't pass the exam. 這4個學生考試不及格。(作定語)There are twenty two boy students in our class. 我們班有22個男生

6、。(作定語)They two will go to attend the meeting with you.他們倆個人將與你一起去參加那個會議。(同位語) 基數詞與名詞連用表示編號。Lesson Eight 第八課Class One, Grade Three 三年級一班Room 102 102號房間No.4 Middle School 四中38 Changan Street 長安街38號Bus No.10 10路公共汽車P.O.Box 325 325號信箱Tel. No. 6850,3258 電話號碼：6850，3258 數詞復數表示年齡和年代、月份和日期。l 表求確切年齡注意：年代是四位數時

7、，各分成二位來讀：19 98年：讀作：nineteen ninety eight。日期按序數詞讀：7月10日讀作July tenth。l 表示年代或人的不確切歲數，用幾十的復數形式in the 1960s二十世紀六十年代 in ones +數詞復數在某人幾十多歲in the forties 在40年代 The old man is now in his eighties.這位老人現在已經80多歲了。l 表示年、月、日in 1992 在1992年；in June, 1966 在1966年6月；on July 28, 1978 在1978年7月28號 基數詞用于表示時間。 表示時間有兩種方法：l

8、表示“幾點過幾分”，30分鐘之內用介詞past。八點十分ten past eight 九點一刻 a quarter past nine 1230 half past twelvel 表示“幾點差幾分”，30分鐘之內(不包括30分整)，用介詞to。(750) ten to eight (845) a quarter to nine (1250) ten to onel 也可以按照時刻表直接讀數字。二點四十two forty 五點半five thirty 七點一刻seven fifteen 九點零五nine 0 five基數詞可以表示算式。8+4=12 Eight plus(and) four i

9、s twelve.15-9=6 Fifteen minus nine is (leaves) six.7×9=63 Seven times nine is sixty three.30÷6=5 Thirty divided by six is five.二、序數詞 表示數目的順序或事物的位置的詞，叫作序數詞。1.序數詞的形式 l 從第一到第三為獨立的特殊形式 first, second, third.l 從第4到第19 以基數詞加“th”構成：fourth, fifth, sixth, seventh, eighth, ninth tenth, eleventh, twel

10、fth, thirteenth, fourteenth fifteenth, sixteenth, seventeenth, eighteenth, nineteenthl 第20以上的的序數詞 從20到90等以ty 結尾的十位整數，把 y 改成i再加 “eth”構成序數詞twentieth, thirtieth, fortieth, fiftieth, sixt ieth, seventieth, eightieth, ninetiethl 100的序數詞為：hundredth。l 其余的兩位或多位數，只將個位改成序數詞 ，其余仍用基數詞表示：twenty-first, thirty-sec

11、ond, fortythird two hundred and ninth-eighth(第298)three thousand, seven hundred and twenty-first(第3721)注意：fifth, ninth, twelfth與原基數詞拼寫不同。序數詞的縮寫形式為阿拉伯數字加序數詞最后兩個字母組成。122nd(第122)，38th(第38)，281st(第281) 2983rd(第2983)，1320th(第1320)基變序口訣基變序，有規律，詞尾要加th 。一二三，特殊記，詞尾分別tdd。八去t ，九去e。五和十二ve要用f替。整十數y尾變ie，再加th莫忘記。若

12、遇幾十幾，只變個位就可以。2.序數詞的用法(1)序數詞可以作主語、賓語、表語、狀語和定語The second is better than the first. 第二個比第一個好。(作主語)He has built five bridges since 1950, now he is starting on the sixth .自1950年以來，他已建造過五座橋了，現在他正開始建第六座橋。(作賓語)Mary is the first to complete the test paper in her class. (作表語) 瑪麗是她們班上第一個完成試卷的人。She always comes

13、 first. 她總是第一個到。(作狀語)This was the first time he came to China. 這是他第一次來中國。(作定語)序數詞在使用時，通常前面要加定冠詞the ；但是如果序數詞前出現不定冠詞a 或an時,則表示“再", “又"。You can do it a second time. 你可以做第二次。(作定語)(2)序數詞可以表示日期。It's September the first today. 今天是9月1日。It happened on September 18th, 1931. 這發生在1931年9月18日。(3)序數詞

14、可以表示編號。the twelfth lesson (=Lesson12) 第十二課 the second paragraph (=Paragraph Two) 第二段the fourth Middle School (=No.4 Middle School) 第四中學 the thirty eighth room(=Room 38) 第38號房間 the tenth page (Page 10)第10頁三、數詞的特定表示法和讀法(1) 分數表示法 分數的構成分數的構成為分子用基數詞，分母用序數詞，分子如果大于1，則分母序數詞一般都用復數形式。1/2：a (one) half, 1/3：a (

15、one) third, 1/4：a quarter 2/5：two fifths, 3/4：three quarters1/25：a twenty fifth, 1/100：a hundredth， 3/100：three hundredths, 5/1000：five thousand ths帶分數的整數和分數之間須用and連接： three and a half 讀作 five and a quarter注意：表示“某一整體的幾分之幾”，使用：分數+of+the+名詞。She spent one third of her salaries yesterday. 她昨天花去了薪水的三分之一。

16、One half of the students are foreigners. 一半的學生是外國人。They have covered three fifths of the distance. 他們已經走完了五分之三的距離。(2)小數表示法小數只能用基數詞表示。其中小數點讀作point，零讀作zero；小數點之后按數字依次讀出；整數部分為零時，可以省略不讀。0.9：zero point nine 或 point nine 3.58：three point five eight 0.016：0 point 0 one six8.025：eight point 0 two five 99.87

17、：ninety nine point eight seven(3)百分數表示法%讀作per cent 18%：eighteen per cent 0.6%：zero point six per cent 99.9：ninety nine point nine per cent 0.05%：0 point 0 five per cent注意：數詞與表示單位的名詞一起使用作定語時，單位名詞必須用單數。二十英鎊的紙幣：a twenty pound note(4) 算式的表示方法加法 “加”用plus, and或 add表示；“等于”用is, make, equal等詞表示.1+2=？可表示為：How

18、 much is one plus two? 一加二等于多少？1+2=3 One plus two is three. One and two is equal to three. One and two make three.One added to two equals three. If we add one to/and two,we get three.減法 “減“用minus或take from表示。9-3=？How much is nine minus three? 九減三等于多少？9-3=6 Nine minus three is six. Take three from ni

19、ne and the remainder is six. Three(taken) from nine is six.乘法 “乘”用time（動詞）或multiply表示。2×3=? How much is two times three? 二乘以三等于多少？2×3=6 二乘以三等于六。Two times three is/are six. Multiply two by three,we get six.Two multiplied three makes six. 除法 “除”用divide的過去分詞形式表示 15÷3=?How much is fifteen

20、 divided by three? 十五除以三等于多少？15÷3=5 Fifteen divided by three is five. Fifteen divided by three equals/gives/makes five. 其他算式的寫法和讀法 比例、乘方、開方等算式的讀法1：2 讀作 the ratio of one to two15：3讀作 The ratio of fifteen to three equals five.32 讀作 three squared(5) 數詞前加every ,表示每/每隔 .every ten days  =every n

21、inth day  每十天(每隔九天)注:every +基數詞 +復數名詞 = every + (序數詞-1) +單數名詞(6) “多少又一半”的表達法:基數詞 + and + a half +名詞復數 = 基數詞 +名詞(單數/復數) +and +a half half an hour半小時two and a half hours  = two hours and a half (7) 倍數倍數+as+形(副)原級+as I have three times as many as you.我有你三倍那么多倍數+形(副)比較級+than This fish is 3 tim

22、es heavier than that one.(8) 序數詞與冠詞a/an連用。序數詞前加不定冠詞a/an, 表示“又一”、“再一”的意思。如：Please try it a second time. 請再試一試。 但基數詞與more連用，并放在more前，表示“另外有”、“還有”的意思。如：Ill take one more (=another) pencil. 我還要一支鉛筆。We ve just started! There were twenty more trees to be planted! 我們才剛開始呢!還有20棵樹要栽呢!【考點詮釋】【考例1】In our city,

23、_ middle school students want to work as a teacher in the future. 2009年重慶A. thousand        B. thousand ofC. thousands of     D. two thousand of 【解析】  答案為C。考查數詞的用法。thousands of是一個詞組，意為“成千上萬的”，表示一個大概的數量，注意這時thousand用復數，且前面不能加明確的數字。【考例2】

24、The road is over _ metres long2008年濟南Asix hundred and fifty-two B six hundreds and fifty-two Csix hundred，fifty-two Dsix hundred，fifty and two 【解析】答案A。本題考查數詞的書寫形式。在英語中，百位與十位之間通常用and連接，由此可知，答案在A與B之中，在表示確切的數字時，hundred不能用復數形式。【考例3】We are sure the_0lympic Games in Beijing next Year will be one of _games

25、 in history2007 連云港A twenty-nine more successful B twenty-ninth；more successful C twenty-ninth；the most successful D. twenty-nine; the most successful 【解析】答案C。解析本題綜合考查序數詞表次序，基數詞表數量的用法。句意為：來年的北京奧運會為第二十九屆奧運會，這是不爭的事實，此處應使用序數詞表順序，由此可確定答案在B與C之中；再由句意可知，后面應是一個最高級的句子，所以C項正確。【考例4】Qinghai-Tibet Railway(青藏鐵路)w

26、as completed last yearIt is the _railway that connects Tibet with the 0ther parts of China2008鹽城Afirst B secondC third Dfourth【解析】答案A。本題考查序數的用法。句意為：青藏鐵路是第一條將西藏與其他地區連接起來的鐵路干線。【考例5】Harry Potter and the Deathly Hallows, _book of the series(系列)，will be for sale on July 212008湖南懷化Aseventh Bthe seventh Cs

27、even【解析】答案：B由句意“系列叢書的第七本書將在年7月21日被出售”可知此空要用序數詞，且序數詞前要加定冠詞the，故選B。【考例6】About _of the students in our school are hoys常德Athird fifths B three fifths Cthree fifth【解析】答案B。在英語中表示分數的方式為“序數詞+基數詞”，如果分子大于1，則分母用復數形式。【考例7】 (2004年上海市徐匯區中考試題) About _ students in our class can describe that place in English. A. th

28、ree-fifths B. three-fifth C. third-five D. third-fifths【解析】答案：A。該題考查的是分數的表示法。分子用基數詞表示，分母用序數詞表示。分子大于1時，分母應加-s，因此應選A。【考例8】 (2004年河北省中考試題) Nine _ pounds a week? Thats very good. A. hundred of B. hundreds of C. hundreds D. hundred【解析】答案：D。該題考查的是數詞的用法。Nine hundred是一個具體的數量，這是數詞不能用復數形式，后面也不能加of。所以應選D。四表示約數

29、1. 用tens/dozens/scores/hundreds/thousands/millions of表示“幾十、幾百、上千、成千上萬”等。如：The boy bought dozens of pencils.那個男孩買了幾十支鉛筆。Thousands of people died in the earthquake.數以千計的人死于地震。2. 用less than, under, below, almost, nearly, up to等來表示小于或接近某數目。如nearly two hours將近兩個小時。3. 用more than, beyond, or more, over, ab

30、ove等來表示超過或多于某個數目。如more than 100 years一百多年。4. 用or, or so, about, around, some, more or less等表示在某一數目左右。如about 50 pens大約五十支鋼筆，a month or so大約一個月。5. 用to, fromto, betweenand表示介于兩數詞。如：His salary rose from 100 dollars a month to 120 dollars a month.他的工資從每月100美元升到了每月120美元。_【中考演練】( )1. It is said that SARS h

31、as killed more than _ people worldwide. A. three hundreds B. three hundreds C. three hundreds D. three hundred( )2. -How many workers are there in your factory? -There are two _. A. hundreds B. hundred C. hundred of D. hundreds of( )3. -Which is the smallest number of the four? -_. A. Two-thirds B.

32、A half C. A quarter D. Three-fourths( )4. -What do you think of a war, Li Ming? -Ive no idea. But its a fact that _ people had to leave their hometown during the War A. three thousands B. thousand of C. thousands of D. several thousands( )5. We all think that the _ century will bring us more hopes.

33、A. twenty-first B. twentieth-first C. twenty-one D. twentieth-one( )6. -Can you write the number eighty-five thousand, six hundred and twenty-six? -Yes, it is _. A. 856620 B. 85626 C. 58662 D. 58626( )7. When was the PRC founded? It was founded on _. A. July 1, 1921 B. October 1, 1949 C. August 1, 1

34、927 D. May 1, 1922( )8. I was 8 years old when my father was 31. This year my father is twice my age. How old am I? A. 21 B. 22 C. 23 D. 24( ) 9. _ Chinese are looking for ways to learn English well before Beijing 2008 Olympics. A. Thousand B. Thousands C. Thousand of D. Thousands of( )10. Both of t

35、he two rulers are broken. I want to buy a _one.A. three B. third C. forth D. /( )11During World War II, a Jewish (猶太) lady was protected by a local family in Shanghai in her  _. A. fifties B. fifty C. fiftieth D. the fiftieth( )12-How often are the Olympic Games held？  -_ fo

36、ur years. A. Every      B. Each        C. In         D. For( )13Ive read _ sports news about the F1 race today. A. two B. pieces C. two pieces D. two pieces of( )14_the students in thes

37、e primary school is about three thousand, _of them are girls.     A.A number of; two third  B. The number of; two thirds    C.A number of; two thirds  D .The number of; two third( )15. The river through our city, which is about _, is clean again. A. 6000 metre

38、s long B. 6000-metres-long C. 6000-metre-long D. 6000 metre long( )16It is reported that the train accident in India killed _ people. No Chinese was_ them. A. two hundred; among B. two hundreds; amongC. two hundred; between D. two hundreds; between( )17During the seven-day May Day holiday, families

39、went sightseeing. A. thousand B. thousandsC. thousands and thousands D. thousands of( )18What's one fourth and a half, do you know? Yes, it's _. A. two sixths B. three fourths C. one three D. three sixths( )19_ of the students are girls in our class A. Two three BTwo threes CTwo thirds DSeco

40、nd three( )20The doctor worked for _ after twelve o'clock. A. two more hours B. two another hour C. more two hours D. another two hour( )21. The _ World Table Tennis Championship began _the morning of May 25, 2010 _Moscow, Russia. (2010年咸寧)A. Fifty; in; in B. Fiftieth; on; in C. Fiftieth; in; on

41、 D. Fifty; on; in( )22.What a pity! Liu Xiang didnt win the_hurdles（跨欄）. (2010巴中市) A.110-meter B.110-meters C.110 meter( ) 23.Can I help you?Id like _ for my twin daughters. (濱州市二一)A. two pair of shoesB. two pairs of shoeC. two pair of shoeD. two pairs of shoes( )24. _girls took part in the Happy Gi

42、rl Competition but only few of them succeeded. (定西市2010年)A. Million of B. Many million of C. One million of D. Millions of( )25There are _ people in the supermarket. It's so crowded. (2010年山東省萊蕪市) Ahundred Bhundreds Chundred of Dhundreds of( )26 - Do you know the boy_ is sitting next to Peter? -

43、 Yes. He is Peters friend. They are celebrating his _ birthday. (2010年四川眉山市) A. who; ninthB. that; ninethC. /; ninethD. which; ninth( )27. I got a good present on my _ birthday. (2010年四川省宜賓市) A. nine B. ninth C. the nine D. the ninth( ) 28.-I hear your pen friend is visiting Lianyungang again.Is it

44、the _time for him?-Yes, and he will come for a third time next spring.( 2009年連云港)A. first B. second C. third D. fourth( ) 29._girls took part in the Super Girl competition but only few of them succeed. A. One million of B. Millions of C. Thousands and millions D. Two millions( ) 30. -Can I help you

45、? -Id like _ for my twin daughters. A. two pair of shoes B. two pairs of shoes C. two pair of shoe D. two pairs of shoe( ) 31. Each of us has to write a _ report every three weeks. A. two-thousand-words B. two-thousand-word C. two-thousands-words D. two-thousands-word( ) 32. Now children , please tu

46、rn to Page_ and look at the _ picture. A. Twenty-three ; fifth B. Twenty-three ; five C. Twenty-third ; fifth D. Twenty-third ; five ( ) 33.-Excuse me , could you tell me where the nearest post office is ? -The nearest post office? You will have to walk _. A. 500-metres away B. 500 meter far C. 500

47、metres farther D. 500 metre-far away( ) 34. This is a big class, and _ of the students are girls. A. two third B. second three C. two thirds D. two three( )35. During the entrance (升學) exams, there are _ parents waiting for their children outside their test center. A. thousands of B. thousand of C.

48、thousand D. thousands( )36. _ people will watch Beijing Olympic Games on TV in 2008. A. Million of B. Millions of C. Five millions D. Million( ) 37.-How old is your son ? -_. We had a special party for his _ birthday last Sunday. A. Nine ; nine B. Nine ; ninth C. Ninth ; nine D. Ninth ; nine( ) 38.

49、This is the _ time in _ days that he has made the same mistakes. A. second; third B. two ; three C. two ; third D. second ; three( ) 39. -How many people will come to Beijing for the Olympic Games in 2008 ? -Its hard to say_ people, I think. A. Million of B. Millions of C. Two millions of D. two mil

50、lions( ) 40. Mothers Day falls on _ Sunday of May. A. two B. second C. the second( )41. It was the second time for China to send a manned (載人的) spaceship into the sky, but it was the _ time for Fei Junlong and Nie Haisheng to go to the space. A. first B. second C. third D. last( ) 42. Kate lives in

51、_.Mine is next to hers. A. the room five B. Room Five C. five room D. room five ( ) 43. -What do you think of the environment here? -Wonderful ! _ of the land _ covered with trees and grass. A. Two fifths ; is B. Two fifth ; is C. Two fifths ; are D. Two fifth ; are( )44. The Peoples Republic of Chi

52、na was founded on _. A . October 1.1949 B. July 1.1921 C. August 1.1927 D. December 25.1950( )45. Does an elephant weigh _?A. two and a half ton B. two tons and a half C. a tons D. half ton( )46. My sister will have her _ birthday next year.A. twelve B. twelfth C. twelfieth D. eight( )47. How much i

53、s 2/3 plus 4/5? _.A.One and seven fifteenths 1 7/15. B. One seven fifteenth 1 7/15. C. One and seven fifteenth 1 7/15. D. One seven fifteenths 1 7/15. ( )48. The pocket calculator is only _ the size of the old type. A. one forth B. one four C. one fourth D. one fourteen( )49. This is a _ road. It is

54、 _ the newly built road.A. twenty-metres-wide , half as wide asB. twenty-meters-width , a half as wide asC. twenty meters wide , half the width of D. twenty-meter-wide , half as wide as( )50. The number of the students in our school is _ that in their school.A. two times as many as B.twice as more asC. two times as much as D.twice times as many as( )51. Is the young engineer _ or _?A. over thirtyunder thirty B.on thirtyunder thirtyC. over thirtiethunder thirtieth D.over thirtiesunder thirties( )52. _ ago there liv