初中英語數(shù)詞講解

1、中考英語知識點,數(shù)詞,1,數(shù) 詞,基數(shù)詞,序數(shù)詞,數(shù)量,順序,2,基數(shù)詞的構(gòu)成,1）112, 獨立成詞。 one two three four five six seven eight nine ten eleven twelve 2）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 40forty 50fifty 80-eighty 60-sixty 70-se

2、venty 90ninety 4）2199， 兩位數(shù)，十位與個位之間有 “”。 21 twentyone 55 fiftyfive 99 ninetynine 5）101999，三位數(shù)，百位與十位/個位之間加and。 101 one hundred and one 840 eight hundred and forty 693 six hundred and ninety-three,3,29,431,500,7,6,thousand,hundred,million,billion,and,6) 1，000以上數(shù)目,從右向左每三位用“，” 分開,分別讀為thousand , million,

3、billion,基數(shù)詞的構(gòu)成,4,序數(shù)詞的構(gòu)成,基數(shù)詞變序數(shù)詞的方法： 基變序，有規(guī)律；詞尾要加th。 一二三，特殊記；詞尾分別tdd。 八去t ，九去e ；ve則以f替。 ty 則變作 ti ; 后面還有一個e。 要是遇到幾十幾；只將個位變成序。 eg. onefirst twosecond threethird eighteighth nineninth twelvetwelfth twentytwentieth twenty-one -twenty-first,5,數(shù)詞的應(yīng)用,一.時刻表達法：(介詞用at） 1.整點：基數(shù)詞 + oclock eg. its eight oclock n

4、ow. 2.幾點幾分： .直接表達法：先小時后分 eg. 3:25 three twenty-five .間接表達法：先分后小時 1)(30分鐘)用to：(60-分鐘數(shù)) to (小時數(shù)+1) eg. 3:35 twenty-five (minutes) to four 3) 30分鐘 = half 15分鐘 = 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,6,數(shù)詞的應(yīng)用

5、,二.日期表達法： 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on 1999 nineteen ninety-nine 2008 two thousand and eight 1949年10月1日 讀作: october (the) first, nineteen forty-nine (月-日，年) the first 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 2.表示“在世紀(jì)”, 用

6、序數(shù)詞 在20世紀(jì) 寫作：in 20th century 讀作：in the twentieth century,7,數(shù)詞的應(yīng)用,三.表編號 編號在前，名詞在后，用序數(shù)詞，前面有the 編號在后，名詞在前，用基數(shù)詞，注意首字母大寫 房間號碼和電話號碼要一個一個分別讀 第一課 第32頁 第305房間 第12路公共汽車,bus no.12,the first lesson（在句子中不大寫） lesson one,the thirty-second page page 32 / page thirty-two,room 305,8,數(shù)詞的應(yīng)用,四.分?jǐn)?shù)的表達：分子（基數(shù)）、分母（序數(shù)） eg. on

7、e third 三分之一 two thirds 三分之二 注意：1.分子超過1時，分母加s 2.含分?jǐn)?shù)的短語作主語由分?jǐn)?shù)后的詞決定謂語 eg.1)one third of the students are girls. 2)one third of the milk is mine. 3.分?jǐn)?shù)的特殊形式 1)one third = a third 2)one fourth = a quarter three fourths = three quarters 3)one second = a half 半年 half a year 半小時 half an hour 一年半 one and a h

8、alf years one year and a half,9,五.序數(shù)詞作定語，前面要加the； the first truck is carrying a food basket john lives on the fifteenth floor she 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 him a third time？ when i sat down，a fourth man rose to speak they had a

9、 second child in 1988,數(shù)詞的應(yīng)用,10,六.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), 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。 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,數(shù)詞的應(yīng)用,11,七.其他 “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 3、“基數(shù)詞+名詞” 的合成形容詞作