英語學(xué)習(xí)-數(shù)詞

1、數(shù)詞知識要點基數(shù)詞 (構(gòu)成及用法)序數(shù)詞 (構(gòu)成及用法)分?jǐn)?shù)、小數(shù)和百分比日期和年份鐘點數(shù)學(xué)運算表達(dá)數(shù)字的表達(dá)和其他數(shù) 詞數(shù)詞基 數(shù) 詞 序 數(shù) 詞數(shù) 量順 序基數(shù)詞的構(gòu)成1）112, 獨立成詞ONE TWO THREE FOURFIVE SIX SEVEN EIGHT NINE TEN ELEVEN TWELVE2）13-19, 由39 + TEEN構(gòu)成14FOURTEEN 16-SIXTEEN 17-SEVENTEEN 19NINETEEN特殊拼寫: 13 THIRTEEN 15-FIFTEEN 18EIGHTEEN 3）2090, 以-TY結(jié)尾。 20TWENTY 30-THIRTY 4

2、0FORTY 50FIFTY 80-EIGHTY 60-SIXTY 70-SEVENTY 90NINETY 4）2199， 兩位數(shù)，十位與個位之間有 “”21 TWENTYONE 55 FIFTYFIVE 99 NINETYNINE5）101999，三位數(shù)，百位與十位/個位之間加AND101 ONE HUNDRED AND ONE840 EIGHT HUNDRED AND FORTY693 SIX HUNDRED AND NINETY-THREE基數(shù)詞的用法1、表示具體數(shù)目,HUNDRED, THOUSAND, MILLION不用復(fù)數(shù) 表示不確定數(shù)目,用復(fù)數(shù)。即HUNDREDS OF(數(shù)百),

3、THOUSANDS OF(數(shù)千), MILLIONS OF(數(shù)百萬)+ 名詞復(fù)數(shù),可以用MANY/SEVERAL修飾，但不能與具體數(shù)目連用例 句1) OUR COUNTRY HAS A POPULATION OF 1,300 MILLION PEOPLE.2) THERE ARE THREE THOUSAND STUDENTS IN OUR SCHOOL.3) AFTER THE WAR, THOUSANDS OF PEOPLE BECAME HOMELESS.4) SEVERAL / MANY THOUSANDS OF TREES MUST BE PLANTED EVERY YEAR.基數(shù)詞

4、的用法2、 “幾十”的復(fù)數(shù)形式可以表示：幾十多歲 - IN + ONES + 數(shù)詞復(fù)數(shù)年 代 - IN + THE +數(shù)詞復(fù)數(shù)1) HE DIED IN HIS FORTIES四十多歲2) IN THE NINETIES, MOST PEOPLE GO TO WORK BY BIKE. 90年代基數(shù)詞的用法3、“基數(shù)詞+名詞” 的合成形容詞作定語，中間有連字符“”,當(dāng)中的名詞用單數(shù)A THREE YEAR OLD GIRL A SEVEN-DAY HOLIDAY4、表計量- “基數(shù)詞+度量單位+形容詞”THE CLASSROOM IS 7 METERS LONG, 6 METERS WIDE

5、AND 3 METERS HIGH.序數(shù)詞的構(gòu)成1) 13, FIRST, SECOND, THIRD 2) 419, 相應(yīng)基數(shù)詞+TH,特殊拼寫:FIFTH, EIGHTH, NINTH, TWELFTH3) 2090, Y變成IE +TH, 如TWENTIETHTWENTY-FIRST, THIRTY-SECOND 序數(shù)詞的構(gòu)成4) 2199, 只把個位的基數(shù)詞變成序數(shù)詞如TWENTY-FIRST, NINETY-NINTH5) 100 (ONE) HUNDREDTH6) 序數(shù)詞縮寫-數(shù)字最后兩字母 如1ST, 2ND, 3RD ,4TH序數(shù)詞的用法(1)序數(shù)詞作定語，前面要加THE TH

6、E FIRST TRUCK IS CARRYING POTATOES TO THE FARMJOHN LIVES ON THE FIFTEENTH FLOORSHE IS MY FIRST ENGLISH TEACHER.(2)有時加A/AN，“再一”，“又一” 的意思WELL HAVE TO DO IT A SECOND TIME SHALL I ASK HER A THIRD TIME？THEY HAD A SECOND CHILD IN 1988分?jǐn)?shù)、小數(shù)和百分比分子用基數(shù)詞，分母用序數(shù)詞分子大于1時，分母加-S1/4 ONE-FOURTH A (ONE) QUARTER3/4 THRE

7、E-FOURTHS THREE QUARTERS 2/3 TWO-THIRDS1/2 A (ONE) HALF 半年 HALF A YEAR 半小時 HALF AN HOUR一年半 ONE YEAR AND A HALF1/21/31/424/25 3/43three fourths / three quartersone third /a thirdtwenty-four twenty-fifthsthree and six sevenths one quarter /a quarter/ one fourtha half分?jǐn)?shù)、小數(shù)和百分比表示小數(shù)時，小數(shù)點前面的基數(shù)詞和前面的基數(shù)詞的讀法相

8、同；小數(shù)點后的數(shù)字則必須一一讀出：0.82 讀作: ZERO POINT EIGHT TWO1.36 讀作: ONE POINT THREE SIX 百分?jǐn)?shù)由PERCENT表示，百分號讀作 PERCENT 0.68ZERO POINT SIX EIGHT PERCENT 6SIX PERCENT 369THREE HUNDRED AND SIXTY NINE PERCENT 日期和年份年用基數(shù)詞表示,兩位一讀,介詞用 IN日用序數(shù)詞表示,介詞用 ON1949年10月1日 讀作: OCTOBER (THE) FIRST, NINETEEN FORTY-NINE (月-日，年) THE FIRST

9、 OF OCTOBER, NINETEEN FORTY-NINE (日-月，年)寫作: OCTOBER 1ST,1999(日用縮寫，月-日-年)OCTOBER 1, 1999 (日用數(shù)字)1ST OCTOBER,1999日-月，年日期和年份表示“在世紀(jì)”, 用序數(shù)詞在20世紀(jì) 寫作：IN 20TH CENTURY 讀作：IN THE TWENTIETH CENTURY鐘 點1) 順讀法-先時后分, “幾點幾分” 9:30 NINE THIRTY 6:21 SIX TWENTY-ONE2) 逆讀法-先分后時 表示“幾點過幾分”，半小時以內(nèi)，介詞用PAST 分鐘數(shù)+PAST +鐘點數(shù) 10:10

10、TEN PAST TEN 8:20 TWENTY PAST EIGHT 表示“幾點差幾分”，半小時以上，介詞用TO 60減原分鐘+ TO + (下一個)鐘點數(shù) 9:50 TEN TO TEN 7:40 TWENTY TO EIGHT鐘 點3) 15分鐘：A QUARTER 30分鐘：A HALF 9點15分：A QUARTER PAST NINE 12點30分：HALF PAST TWELVEWhat is the time? six/six oclock four o five/ five past four seven fifteen/a quarter past seven nine t

11、wenty/ twenty past nine nine thirty/half past nine six forty/twenty to sevenWhat is the time? six/six oclock four o five/ five past four seven fifteen/a quarter past seven nine twenty/ twenty past nine nine thirty/half past nine six forty/twenty to seven數(shù)字的其他用法LESSON ONE / THE FIRST LESSONCLASS ONE,

12、 GRADE NINENO. 929 BUSCHANNEL EIGHTROOM 1214 基數(shù)詞1 one2 two3 three4 four5 five6 six7 seven8 eight9 nine10 ten 序數(shù)詞1st first2nd second3rd third4th fourth5th fifth6th sixth7th seventh8th eighth9th ninth10th tenth11 eleven *12 twelve 13 thirteen *14 fourteen 15 fifteen 16 sixteen 17 seventeen 18 eighteen *19 nineteen11th eleventh12th twelfth13th thirteenth14th fourteenth15th fifteenth16th sixteenth17th seventeenth18th eighteenth19th nineteenth 基數(shù)詞 序數(shù)