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2012中考英语语法重点 数词 1

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2012-05-26 12:38

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  数词

  数词分为基数词和序数词。用于表示事物数目的词称为基数词,表示事物顺序的词称为序数词。

  1.基数词(1000以内的基数词的读法)

  (1)1-20:one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve,thirteen,fourteen,fifteen, sixteen,seventeen,eighteen,nineteen,twenty

  2.基数词变序数词的方法:

  (1)一般在基数词后加th

  eg.four→fourth,thirteen→thirteenth

  (2)不规则变化

  one→first,two→second,three→third,five→fifth,eight→eighth,nine→ninth,twelve--~twelfth

  (3)以y结尾的十位整数,变y为ie再加th

  twenty→twentieth, forty→fortieth,ninety→ninetieth

  (4)从二十一后的“几十几”直至“几百几十几”或“几千几百几十几”只将个位的基数词变为序数词。

  twenty-first,two hundred and forty-fifth

  口诀:

  基变序,有规律;词尾要加th。

  一二三,特殊记;词尾分别tdd。

  八去t ,九去e ;ve则以f替。

  ty 则变作 ti ; 后面还有一个e。

  要是遇到几十几;只将个位变成序。

  3.数词的应用:

  A、时间:

  a. 整点:基数词 + o’clock

  eg. It’s eight o’clock now.

  b. 几点几分:

  1.直接表达法:先小时后分

  eg. 3:25 three twenty-five

  2.间接表达法:先分后小时

  1)(<30分钟)用past :分钟past 小时

  eg. 3:25 twenty-five (minutes) past three

  2) (>30分钟)用to:(60-分钟数) to (小时数+1)

  eg. 3:35 twenty-five (minutes) to four

  3) 30分钟 = half 15分钟 = a quarter

  eg. 3:30 three thirty = half past three

  3:15 three fifteen = a quarter past three.

  3:45 three forty-five = a quarter to four

  B、日期表达法:月日,年(或日月年)

  1949年10月1日 :

  October1st , nineteen forty-nine

  =the first of October, nineteen forty-nine

  2000年: the year two thousand

  =twenty hundred

  2001年: twenty o one

  3月1日: March the first = the first of March

  C、表编号:

  第207房间:Room 207

  第五课: Lesson 5 = the fifth lesson

  D、序数词与不定冠词(a; an)连用表“又一;再一”

  eg. You’ve done it three times. Why not try a fourth time?

  E、分数的表达:分子(基数)、分母(序数)

  eg. one third 三分之一 two thirds 三分之二

  注意:1.分子超过1时,分母加s

  2.含分数的短语作主语由分数后的词决定谓语

  eg.1)One third of the students are girls.

  2)One third of the milk is mine.

  3.分数的特殊形式

  1)one third = a third

  2)one fourth = a quarter

  three fourths = three quarters

  3)one second = a half

  F、表约数:

  表不确定的数字时,数词用复数。

  若带名词,再加of

  如:hundreds of(数百,成百上千的),thousands of(数干,成千上万的),millions of(数百万的)

  G、数学运算的表达

  eg.3+5=8 Three plus/and five is eight.

  9-2=7 Nine minus two is seven.

  6x5=30 Five times six is thirty

  8÷2=4 Eight divided by two is four.

  练习

  ( )1.If you go out at night, you’ll be able to see ____ starts.

  A. thousands of B. thousand of

  C. nine thousands of D. thousands

  ( )2.Monday is ___ day of the week.

  A. first B. the first

  C. the second D. second

  ( )3.You’ve done it twice. Why not try ____ time?

  A. third B. the third C. a third D. once

  ( )4.Which is the____ month? It’s September.

  A. nine B. nineth C. ninth D. ninety

  ( )5.December is ___ of the year.

  A. the twelfth months B. the twelfth month

  C. the twelveth months D. twelve months

  ( )6.There are ___ floors in the building and he lives on the ____ floor.

  A. eighteen, fifteen B. eighteenth, fifteenth

  C. eighteen, fiveteen D. eighteen, fifteenth

  ( )7.I was born ___, 1982.

  A. on June 2rd B. in June 2nd

  C. on June two D. on June 2

  ( )8.It’s ____ from our home to the zoo.

  A. two and a half hours’ walk

  B. a half and two hours walk

  C. two hours and a half hour’s walk

  D. two and a half hour’s walk

  ( )9.What time is it now? It’s ___ to six.

  A. quarter B. a quarter C. quarto C. a quarto

  ( )10.Will you be back in ____ ?

  A. one or two minutes B. one minute or two

  C. two minutes or one D. two or one minute

  ( )11.Mary’s uncle went to France ____.

  A. in his thirties B. on his thirties

  C. at his thirties D. about his thirties

  ( )12.The headmaster wrote a ___ report.

  A. two thousand words B.two-thousand-words

  C. two-thousand words D. two-thousand-word

  ( )13.____of the apples in the fruit bowl are soft and sweet.

  A. Two-third B. Second-third

  C. Two-thirds D. Second-thirds

  ( )14.We have learned about ____ these days.

  A. several hundreds English words

  B. hundreds of English words

  C. hundred of English words

  D. several hundred English word

  ( )15.A UN report says that the word population will pass six billion by the end of ____ century.

  A. twentieth B. twenty

  C. the twentieth D. the twentyth

 


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