數(shù)詞用法知多少

1、數(shù)詞用法知多少近幾年的中考中，經(jīng)常有涉及數(shù)詞方面的知識,也是學(xué)生經(jīng)常出錯的地方。本文就數(shù)詞的用法作一歸納 ,供大家在復(fù)習(xí)中參考。一、除了從 1-12個基本數(shù)詞（基數(shù)詞）用不同的詞表達外，從 13-19 后都有-teen后綴。女口：one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve, thirteen， fourteen， fifteen ，sixteen， seventeen， eighteen， nineteen二、從20至90之間表整十的數(shù)詞都跟后綴-ty。如：twenty， thirty ，

2、forty ， fifty ， sixty ， eighty， ninety表示“幾使幾”用整十加個位數(shù)構(gòu)成，中間用連字符“ -”。如：twenty-one， thirty-two ， forty-three， fifty-four ， ninety-six三、表示幾百，幾千，幾百萬，十億用數(shù)詞 1-9 加 hundred， thousand， million，billion 構(gòu)成。 如：four hundred， five thousand， seven million， nine billion注意：幾百幾十之間一般用 and連接。如：three hundred and forty- ni

3、ne， six hundred and seven四、表示不確定的“數(shù)百”，“數(shù)百萬”，“數(shù)千”，“數(shù)十億”時，用“hundreds，“thousands， “millions”，“billions” 加“ of” 構(gòu)成。如：There are hundreds of teachers in our school.Thousands of students are studying in our school.The mountain is covered with billions of trees.五、表示順序的詞（序數(shù)詞）除 1-3 外，其余的后面都有后綴 -th。 如：first ，

4、second， third，fourth， fifth ， ninth ， eleventh， twelfth六、整十的序數(shù)詞后面是由基數(shù)詞變y為i,再加eth構(gòu)成。如：twenty twentieth, eight尸eightieth,ninety ninetieth其余的整數(shù)加個位數(shù)構(gòu)成的詞,只變個位數(shù)為序數(shù)詞即可。 如：twenty-nine twenty-ninth , forty-five forty-fifth , fifty-six fifty-sixth , sixty-seve n sixty-seve nth , nin ety-seve n ninety-seventh七

5、、序數(shù)詞前一般加定冠詞the,但有時加不定冠詞表示“又一”， “再一”等。 如：I have tried twice. I want to try a third time.He has failed three times. He will try a fourth time.八、數(shù)詞與名詞連用時，如幾號，幾班，幾年級，房間號及郵編號 碼時，首字母都大寫。 如：Number One， Class Three， Grade Two， Room 218， Zip Code257091九、表示倍數(shù)的大小時，兩倍用 twice 表達，三倍以上用數(shù)詞加times表達。女口：My school is t

6、wice as large as theirs.Five times seven is 35.十、 分數(shù)的表達：分子基數(shù)詞，分母序數(shù)詞，分子大于1，分母加 s。如：1/4宀 one fourth, 3/4宀 three fourths (three quarter) 1/5宀 one fifth ,4/5 t four fifths十一、小數(shù)的表達，小數(shù)點讀作point，其余的按基數(shù)詞讀出。女口：0.2 tzero point two， 5.79 tfive point seven nine十二、百分數(shù)的表達，百分號讀作 percent女口：10%t ten percent， 16%t six

7、teen percent， 0.7% tpoint seven percent, 89%teighty-nine percent十三、數(shù)詞算式表達：+ tplus,T minus,x multiplied-divided。 如：5+7tfive plus seven,9 3tnine minus three,8x 9teightmultiplied by nine , 64 8tsixty divided by eight, 6:5 tthe ratio of six to five ， 42 tfour squared， 33tthree-cubed， 54tthe fourth power

8、 of five十四、 與數(shù)有關(guān)的幾個常用單詞及詞組。 如：half 一半， a dozen 一打， dozens of 幾十， a score 二十， scoresof許多， several (a few),幾個，數(shù)個鞏固訓(xùn)練1. About of the workers are young man.A. third fifthsB. three fifthsC. three fivesDthree fifth2. The computer of this kind can work than that kind.A. hundreds of times fasterB. hundred o

9、f times fasterC. hundred times fasterD. a hundred time faster2. Two A. hundred old peopleC. hundreds of people3. He graduated in _A. the sixtieth; twentydied of flu last year.B. hundreds of old peopleD. hundreds old peopleof centrury.B. sixty; the twentiethC. the sixties; the twentiethD. sixty; twenty4. The two great men wrote those