一份信心，一份努力，一份成功;十分信心，十分努力，十分成功。今天小編為大家帶來了八年級英語數詞講解例題解析，更多精彩內容請關注應屆畢業生考試網。
國中英語語法梳理和提高——數詞講解例題解析
數 詞
英語數詞表示數目或者順序， 可分為基數詞和序數詞。基數詞表示數量，序數詞表示順序。
知識梳理：提綱挈領，抓住重點和難點!
一、基數詞的構成
1.1-12的基數詞是獨立的單詞，即： one，two，three，four，five，six，seven，eight， nine，ten，eleven，twelve。
2.13-19的基數詞以-teen結尾。如： fourteen，seventeen等，但13，15，18較特殊， 13-thirteen 15-fifteen 18-eighteen。
3.20-90的整十位均以-ty結尾。如： sixty，ninety，但20，30，40，50，80較特殊， 20-twenty 30-thirty 40-forty 50-fifty 80-eighty。
4.十位數與個位數之間要加連字元號"-"，如：28-twenty-eight，96-ninety-six。
5.百位和十位(若無十位則和個位)之間加and，如：148-one hundred and forty-eight 406-four hundred and six。
red(百)，thousand(千)，million(百萬)，billion(十億)等前面即使有具體的數詞，也不能在它們的後面加s。如：600-six hundred，8百萬-eight million。
7.1000以上的數字，從後往前數每三位加一個逗號"，"第一個逗號前為千(thousand)，第二個逗號前為百萬(million)，第三個逗號前為billion(十億)。英語中無"萬"這個詞，我們可以用"幾十個千(thousand)"表示幾萬，"幾百個千(thousand)"表示"幾十萬"。如：2，510=two thousand five hundred and ten;84，296=eight-four thousand two hundred and ninety-six;274，350=two hundred and seventy-four thousand three hundred and fifty。
二、序數詞的構成
序數詞一般是以與之相應的'基數詞尾加-th構成，例如 fourth, tenth,但以下的這些基數詞變為序數詞時， 有特別之處。
--- first, two --- second, three --- third, five --- fifth, nice --- ninth, twelve --- twelfth
2. 以ty 結尾的單詞， 要先變y為I, 在加-eth. 例如：thirty ---thirtieth, fifty ---fiftieth
3. 以one, two, three 等結尾的多位數詞， 要將各位數變成序數詞。 例如： twenty-one --- twenty-first, one hundred and one --- one hundred and first
注意： 序數詞前常用定冠詞， 有時還可以用不定冠詞 a/an 則表示 "又一 "的意思。
例如：Mr Brown has a second car. 布朗先生另外還有一輛車。
He has tried a second time. 他又嘗試了一次。
三、數詞的應用
1.時刻的表示：小時、點鐘、分鐘、秒鐘要用基數詞。
①"幾點鐘"用基數詞加o'clock。o'clock可省略。如： 5點鐘-five(o'clock).
②"幾點過幾分 "，≤30分鐘"用介詞past。如： 7：05-five past seven;7：15-fifteen (a quarter)past seven;7：30-half past seven。
③"差幾分幾點"用介詞"to"。如：7：40-twenty to eight;7：45-fifteen(a quarter to eight。
④日常生活中的時間讀法常常簡化，直接按基數詞的順序讀。如：7：05-seven o five;7：15- seven fifteen。
2.年月日的表示：
① 年份用基數詞，如：1999年-nineteen ninety-nine; 1900年-nineteen hundred; 2000-two thousand;1905-nineteen o five;
② 年用基數詞，日用序數詞。如：1998年6月8日 寫作：June 8，1998;讀作：June the eighth， nineteen ninety-eight或the eighth of June， nineteen ninety-eight。
3. 世紀、年代表示法：
(在)90年代 (in) the nineties
(在)19世紀 (in) the nineteenth century
(在)18世紀30年代 (in) 1730s或1730's
4.編號的表示：
① Lesson One =the first lesson第一課;
② Bus No.3=the No.3bus 3路公共汽車;
③ 表示住所時不用"No."如：302房間-Room 302(讀作：room three o two);
④ 如果編號的數詞比較長，一般用基數詞。如：Page 457第457頁;
⑤ 電話號碼，用基數詞,如：3855633-three eight five five(double five) six three three(double three)。
5.分數的表達：
分子用基數詞，分母用序數詞，分子大於"1"，分母則加"s"。如：1/3 one third，2/3two thirds;
另外：1/2 a(one)half; 1/4one fourth或a(one)quarter;3/4threefourths或three quarters。
half a second; a quarter of a second四分之一秒
6. 表示有小數的詞用基數詞。
5.5 five point five
12.135 twelve point one three five
7.表示百分數
5℅：five percent (per cent)， 0.8℅ zero point eight percent (per cent).
8.表示有小數的詞用基數詞。
5.5 five point five
12.135 twelve point one three five
9.其他用法：
1)基數詞+單數名詞+形容詞構成合成形容詞。如：一個五歲的男孩a five-year-old boy;
一座800米長的橋an 800-metre-long bridge;女子400米接力girls'400-metre relay race。
2)具體數詞+metre(s)/kilometre(s)/kilo(s)long / high /tall /deep /away等。如：長江長6300公里。The Changjiang River is 6，300 kilometres long.
3)表示"幾十歲"用序數詞，eg. 在他三十幾歲時 in his thirties
4)倍數的表達：(一倍用once，兩倍用 twice，兩倍以上用基數詞+times。如：5倍five times)。
例如：He is as tall a boy as I.
He is a head taller than I .
He is two years older than I
China is four times as large as Europe.
I am twice as old as you. (=I am twice older than you. /I am twice the age of you.)
My books are twice as many as yours.
China is four times larger than Europe.(=China is four times the size of Europe.)
I pay twice as much as it was worth.
I pay twice as much for the house.
例題解析：舉一反三，學的更輕鬆!
1. _______ Chinese are looking for ways to learn English well before Beijing 2008 Olympic.
A. Thousand B. Thousands C. Thousand of D. Thousands of
2. Both of the rules are broken. I want to buy a ______ one.
A. three B. third C. forth D. /
3). --- Which is the smallest number of the four? --- _________.
A. Two- thirds B. A half C. A quarter D. Three-fourths
4). Please write down the new words in the text of _______.
A. Lesson Eleven B. the Lesson Eleven C. Lesson Eleventh
解析：1.基數詞hundred, thousand, million, billion 等前有具體數字時，它們後面不能加s,若這些詞後面有介詞of (幾百，成百上千) ，thousands of (幾千，數千個)，millions of, billions of 前不可用數詞修飾。但可用many, some, several 等修飾。故選答案D.
2.答案： B。此題主要考查序數詞的運用。
3.答案：C。此題主要考查英語中的分數表示法。英語中表示分數時，分母用序數詞，分子用基數詞，當分子大於1時，表示分母的序數詞後要加s.
4.答案： A。 此題主要考查基數詞的編號。在通常情況下，名詞編號有這幾種表示法： 1。事物名詞+基數詞，且每個單詞的首字母都要大寫。如：Lesson Eleven;2。定冠詞+基數詞+事物名詞。如： No. 6 Middle School
練習與鞏固：熟能生巧，取得好成績!
選擇填空：
1. _______ of people in the world are sending information by E-mail ever day.
A. Many million B. Several million C. Several millions D. Many millions
2. About _______ of the surface of the earth _______ covered with water.
A. three quarter, is B. three quarters, has C. three quarters, is D. three quarter, are
3. It will take _______ time to finish the work.
A. one and a half years' B. a year and half C. one and a half year's D. a year and half's
4.--- How long will your stay here ?、
---For ________ .
A. one and two day's B. one and two day C. a day or two D. one or two day
he moved to Germany in ______ , he was already in _______ .
A. the fifties; his sixties B. fifties; his sixties
C. the fifties; his sixty D. fifty; sixty
brother lives in ______ on ______ floor.
A. six Room ;second B. Room six ;the second
C. Room six; two floor D. the room six ; the second
mber is _______ month of the year.
A. twelve B. twelfth C. the twelfth D. the twelve
took place in the ______ .
A. 1940 B. 1940s C. 1940es D. 1940th
is only _____ from my home to the train station.
A. ten minutes walk B. ten-minutes walk C. ten minutes 's walk D. ten minutes' walk
e are ______ in this building , I live on ______.
A. nine floors ,the ninth floor B. nine floor, the ninth floor
C. nine floor , nine floors h floor,the ninth floor
water behind the Three Gorges Dams (三峽大壩) should be ______ higher than downstream( 下游)。
A. sixty-five meter B. sixty-fifth meter
C. sixty-five meters D. sixty-fifth meters
12. There are _______ days in a year.
A. three hundred sixty-five B. three hundred and sixty-five
C. three hundred and sixty -five D. two hundreds and sixty-five
13. ---How many teachers are there in your school?
--- __________. , but I'm not sure.
A. Hundreds B. Hundred C. Hundreds of D. One hundred
14. There are _________ doctors and nurses working hard in that hospital.
A. thousand B. two thousand C. two thousands D. two thousands of
15. --- What's one fourth and a half, do you know?
--- Yes, it's _________.
A. two sixths B. three fourths C. one three D. three sixth
16. Now children, turn to page ________ and look at the _______ picture in Lesson Two.
A. twentieth, one B. twenty, one C. twentieth, first D. twenty, first
17. Both of the two rulers are broken. I want to buy a _______ one.
A. three B. third C. forth D. /
18. December is the __________ month in year.
A. twenty B. twelve C. twentieth D. twelfth
19. --- What is the date today?
--- It's _________.
A. Thursday B. June the sixteenth C. the best day D. June fifteen
20. She knows a lot about China as she has been to China ________.
A. for the forth time B. four times C. a fourth time D. for four times
1-5 CCACA 6-10 BCBD 11-15 CCCDA 16 -20 DBDBB
