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1、初一英语 之 基数词与序数词热身运动：12个月份J_ nu_ry F_br_ _ry M_ _ch _pr_l M_ _ _une _ _ly _ _gust S_pt_mb_ _ _ct_b_ _ N_v_mb_ _ D_c_mb_ _ 一、分类：英语中数词主要分为基数词和序数词两类。二、基数词 ： 表示数目的词称为基数词。 （1）基数词的构成法：112的基数是特殊的，必须牢记。请写下来：_1319的基数是在39的基础上加上后缀-teen ti: n（音同“听” ）构成的。其中13，15，18是特殊的。 13thirteen ; 15fifteen ; 18eighteen2090的基数整数
2、是在29的基础上加后缀-ty ti（*音同“踢” ）构成的。其中20，30，40，50，80是特殊的。 20twenty 30thirty 40forty 50fifty 80eighty2199的基数非整数是：整数-个数 （当中要用连字符号“-”隔开 ） 21twenty-one 27twenty-seven 43forty-three 59fifty-nine 66sixty-six 88eighty-eight 93ninety-three 99ninety-nine100900的整百数是：个数（19）+hundred (hundred“百”用单数) 100one(或a) hundred
3、 300 three hundred 800eight hundred101999的非整数是：个数（19）+hundred +and+整数-个数 (没有十位数，就直接用个位数) 101one(或a) hundred and one 309three hundred and nine 210two hundred and ten 413four hundred and thirteen 540five hundred and forty 598five hundred and ninety-eight 970nine hundred and seventy 999nine hundred and
4、 ninety-nine1000以上的基数词在上面的基础上，再在前面加上 个数（19）+thousand (thousand“千”用单数)4，000four thousand 9，000nine thousand1，001one thousand and one 2，008two thousand and eight3，015three thousand and fifteen 4，040four thousand and forty5，069five thousand and sixty-nine 6，200six thousand (and) two hundred 7，486seven
5、thousand four hundred and eighty-six在英语里，数字（阿拉伯数字）通常从个位数起往左，每三个数用一个逗号隔开，而汉语习惯每四个数用逗号隔开（注意区别）从左向右： 第一个逗号用 thousand千第二个逗号用 million千万 第三个逗号用billion亿 第四个逗号用trillion万亿50，000，000 fifty million500，000，000 five hundred million5，000，000，000 five billion50，000，000，000fifty billion练习：25,025,874,953 twenty-five
6、 billion twenty-five million eight hundred and seventy-four thousand nine hundred and fifty-three（2）复数形式的基数词They went to the theatre in twos and threes 他们三三两两地来到了剧院。表示人的不确切岁数或年代，用几十的复数形式表示。 He became a professor in his thirties 他三十多岁时成为了教授。 She died of lung cancer in her forties 她四十来岁时死于肺癌。 It was i
7、n the 1960s 那是在二十世纪六十年代。三. 序数词：序数词是指表示顺序的数词英语中基数词变序数词方法口诀口诀解说举例子基变序，有规律，后面th加上去。在数词后面加th。four fourth一二三，特殊记，后面字母t,d,d。one, two, three特殊变。 first，second，third八去t，九去e。整数中的y要变成ieeight去掉t，nine去掉e。twenty去掉y变成twentietheight eighth nine ninthf来把ve替。five和twelve的ve要变成f 。five fifth twelve twelfth若是遇到几十几，只变个位就可
8、以。两位数或两位以上数字只变个位。thirty-threethirty-third序数词前要加the 我们一定要牢记。序数词前必须加the（上述原则中的除外）the first day归类表格(一)基数词(数目/数量的多少)序数词(顺序和等级)1one1-12单独记忆first1-12单独记忆2twosecond3threethird4fourfourth5fivefifth6sixsixth7sevenseventh8eighteighth9nineninth10tentemth11eleveneleventh12twelvetwelfeth13thirteen13-19尾加+teenthi
9、rteenth13-19尾+th14fourteenfourteenth15fifteenfifteenth16sixteensixteenth17seventeenseventeenth18eighteeneighteenth19nineteennineteenth20twenty20-90(整数)尾+tytwentieth以ty结尾的数词,改y为i,+eth30thirtythritieth40fortyforieth50fiftyfiftieth60sixtysixtieth70seventyseventieth80eightyeightieth90ninetyninetieth100h
10、undredhundredth21twenty-one依此类推twenty-first基数-序数36thirty-sixthirty-sixth四、写出下列基数词的序数词 和它们的简写形式：例如： one first / 1st eleven eleventh / 11th1. (基变序，有规律，第1，2，3，特殊记，词尾字母 st nd rd ) one _/_ two _/_ three _/_twenty-one _/_ twenty-two _/_ twenty-three _/_ thirty- one _/_2. (8减t, 9减 e， 词尾再加th )eight _/_ nine
11、_/_ twenty-eight _/_ twenty-nine _/_ 3.（第5和第12要注意，f来把ve替，词尾再加th） five _/_ twelve_/_ twenty-five _/_4. (整十基数要变序，要把ty变ie,词尾再加thtwenty _/_ thirty _/_ forty_/_ fifty_/_ sixty _/_ seventy_/_ eighty_/_ ninety_/_ 五，根据句子意思填空。1. Childrens Day（儿童节） is on the _of June（六月）.2. There are _months（月）in a year(年).3.
12、 Teachers Day(教师节) is on the _of September（九月）.4. Three plus(加) six is _.六，选择填空。( )1. My cousins birthday in on the of October. A. three B. first C. the second( )2. What date is it today? Its of April. A. twelfth B. the 12th C. 12th( )3. There are days in a week. A. the seven B. seventh C. the seventh D. seven( )4.Sunday is the day of a week. A. one B. first C. second( )5. Twenty-eight minus(减)six is . A. the twenty- second B. twenty-two C. twenty- second( )6. Four plus(加) is twelve. A. seven B. eight C. nine
