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(shí),也是學(xué)生經(jīng)常出錯(cuò)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(gè)基本數(shù)詞（基數(shù)詞）用不同的詞表達(dá)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(gè)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- n

3、ine， 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(shí)，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(gè)位數(shù)構(gòu)成的詞,只變個(gè)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-sevent

5、h七、序數(shù)詞前一般加定冠詞the,但有時(shí)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(shí)，如幾號(hào)，幾班，幾年級(jí)，房間號(hào)及郵編號(hào) 碼時(shí)，首字母都大寫。 如：Number One， Class Three， Grade Two， Room 218， Zip Code 257091九、表示倍數(shù)的大小時(shí)，兩倍用 twice 表達(dá)，三倍以上用數(shù)詞加times表達(dá)。女口：My school i

6、s twice as large as theirs.Five times seven is 35.十、 分?jǐn)?shù)的表達(dá)：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(dá)，小數(shù)點(diǎn)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?jǐn)?shù)的表達(dá)，百分號(hào)讀作 percent女口：10%t ten percent，16%t

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

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

9、hundred of times fasterC. hundred times fasterD. a hundred time faster2. Two died of flu last year.A. hundred old peopleB. hundreds of old peopleC. hundreds of peopleD. hundreds old people3. He graduated in of centrury.A. the sixtieth; twentyB. sixty; the twentiethC. the sixties; the twentiethD. sixty; twenty4. The two great men wrote thos