初中數(shù)詞知識點總結(jié)

1、一、數(shù)詞的概念表示人或事物的數(shù)目和順序的詞是數(shù)詞。如：eight 8 nineteen 19 sixty-six 66 first 第一 tenth 第十 twenty-seventh 第二十七二、數(shù)詞的分類數(shù)詞分為基數(shù)詞和序數(shù)詞。1.基數(shù)詞（1）1-19的基數(shù)詞one two three four five six seven eight nine teneleven twelve thirteen fourteen fifteen sixteenseventeen eighteen nineteen(2)20-90的整十?dāng)?shù)基數(shù)詞twenty thirty forty fifty sixty

2、 seventy eighty ninety(3)非整十?dāng)?shù)基數(shù)詞(十位和個位數(shù)之間用連字符號“-”)twenty-three forty-four ninety-nine（4）101-999的基數(shù)詞 整百基數(shù)詞 five hundred 500 eight hundred 800 非整百基數(shù)詞 one hundred and one 101 three hundred and sixty-five 365（5）1000以上的基數(shù)詞 five thousand 5,000 nine thousand nine hundred and ninety-nine 9,999 thirty thousa

3、nd 30,000（6）年代的讀法：每兩位數(shù)讀一讀 1997nineteen ninety-seven 2010 two thousand and ten請讀一讀下面的句子there were 450 sheep and 83 cows in the farm in 2005. 讀作：there were four hundred and fifty sheep and eighty-three cows in the farm in two thousand and five.2)英語用千、百萬等單位計數(shù),大數(shù)字從右向左看, 每隔三位劃一逗號,倒數(shù)第一個逗號之前要用thousand,倒數(shù)第二

4、個逗號之前要用million,倒數(shù)第三的逗號之前要用billion表示。(3) hundred、 thousand、 million作數(shù)詞時,不用復(fù)數(shù),前面可以加上one, two, 等其它數(shù)詞。用作名詞時復(fù)數(shù)表示“成上”,后面必須要有of,前面可以加上some,many,several等詞。如：five hundred(五百), hundreds of(成百上千的), ten thousand(一萬), thousands of(成千上萬的), millions of(成百萬的)2.序數(shù)詞（1）1-19的序數(shù)詞first第一 1stsecond第二2ndthird第三3rdfourth第四4

5、thfifth第五5thsixth第六6thseventh第七7theighth第八8thninth第九9thtenth第十10theleventh第十一twelfth第十二thirteenth第十三fourteenth第十四fifteenth第十五 sixteenth第十六 seventeenth第十七 eighteenth第十八 nineteenth第十九（2）20-90的整十?dāng)?shù)序數(shù)詞：基數(shù)詞詞尾y變成i,再加ethtwentieth第二十thirtieth第三十fortieth 第四十fiftieth 第五十sixtieth 第六十seventieth第七十eightieth 第八十ni

6、netieth第九十（3）非整十?dāng)?shù)序數(shù)詞twenty-eighth第二十八 28ththirty-third第三十三33rdeighty-first 第八十一81sttwo hundred and fifty-fourth 第二百五十254th1、 英語的序數(shù)詞基本變法： (1) 一般在基數(shù)詞后加th,(2)-ve結(jié)尾的改為-fth,(3)-ty結(jié)尾的改為-tieth,(4)熟記特殊詞。2、序數(shù)詞如下：1000thone thousandth, 1000000th one millionth., 第703the seven hundred and third, 第5480the five th

7、ousand four hundred and eightieth.3、注：(1)兩位以上的序數(shù)詞僅個位數(shù)部分用序數(shù)詞,其余部分仍用基數(shù)詞。如：thirty-sixth,(2) 使用序數(shù)詞時一般加定冠詞the. 如：im in the third grade.(3) 序數(shù)詞作“幾分之幾”講時,有復(fù)數(shù)形式。如：1/5one fifth ; 2/3 two thirds ; 4/7 four sevenths ; 1/2 a half ; 1/4a quarter ; 3/4 three quarters ; 50% fifty hundredths ( fifty per cent).4、數(shù)詞的

8、用法：1、表示年份：2002: twenty thousand and two ; 1976 : nineteen seventy-six.2、表示日期： 12月1日: dec.1st或the first of december；2002年11月8日: nov. 8th, 2002.3、表示時刻： 5：15 five fifteen或a quarter past five ; 8：30 eight thirty或half past eight ; 10：45 ten forty-five或a quarter to eleven.4、表示編號：room 105room one 0 five; b

9、us no.13bus number thirteen; p.5page five; tel.no.7658659telephone number seven-six-five-eight-six-five-nine5、小數(shù)的讀法：5.7 five point seven, 0.16 zero point one six.6、“半”的表達： 1/2half, 半小時half an hour, 1.5小時one and a half hours或one hour and a half. 7、序數(shù)詞前面加the時,表示順序,加a/an時表示“再一、又一”。如：the third lesson is

10、 rather difficult.(第三課相當(dāng)難)/ shall we read the text a third time?(我們把課文讀第三遍,好嗎？)8.算式5+2=7five plus two equals seven.five and two is/are seven5-2=3five minus two equals three.two from/out of five is/are three.5×2=10five multiplied by two equals ten.five times two is/are ten10÷2=5ten divided

11、by two equals five.two into ten goes five times. 32=9three squared is nine.the square of three is nine.23 =8two cubed is eight.the cube of two is eight.=2the square root of four is two.含數(shù)詞的慣用表現(xiàn)1. the children went away by twos and threes. adv.三三兩兩2. he was born in the nineteen-thirties/1930s. 20世紀(jì)三十年代3. we are planning to employ a woman in her twenties. 二十來歲4. i am at one with you on that point. 和你一致5. he is principal, teacher,