初一英语基数词和序数词-全.doc

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 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 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 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 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 in 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2twosecond3threethird4fourfourth5fivefifth6sixsixth7sevenseventh8eighteighth910、由于煤、石油等化石燃料消耗的急剧增加，产生了大量的二氧化碳，使空气中的二氧化碳含量不断增加，导致全球气候变暖、土壤沙漠化、大陆和两极冰川融化，给全球环境造成了巨大的压力。nineninth106、二氧化碳气体有什么特点？ten11、显微镜的发明，是人类认识世界的一大飞跃，把有类带入了一个崭新的微观世界。为了看到更小的物体，人们又研制出了电子显微镜和扫描隧道显微镜。电子显微镜可把物体放大到200万倍。temth答：尽可能地不使用一次性用品；延长物品的使用寿命；包装盒纸在垃圾中比例很大，购物时减少对它们的使用。11eleveneleventh6、二氧化碳气体有什么特点？121、我们每天都要消耗食物和各种各样的生活用品，与此同时，也产生了许多垃圾。twelvetwelfeth13thirteen13-19尾加+teenthirteenth13-19尾+th14fourteenfourteenth15fifteenfifteenth16sixteensixteenth17seventeenseventeenth18eighteeneighteenth19nineteennineteenth20twenty20-90(整数)尾+tytwentieth以ty结尾的数词,改y为i,+eth30thirtythritieth40fortyforieth50fiftyfiftieth60sixtysixtieth70seventyseventieth80eightyeightieth90ninetyninetieth100hundredhundredth21twenty-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_/_ 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. 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根据题意，填入合适的数词。1、Sunday is the ( ) day of a week.2、September is the ( ) moth of a year.3、October the ( ) is National of a year.4. There are _ days in February.二、单项选择 1. - How old is your son?- _. We had a special party for his _ birthday last Sunday.A. Nine; nine B. Nine; ninthC. Ninth; ninth D. Ninth; nine2. Mrs. Turner have _ child today.A. second B. the twoC. a second D. the second3. June is the _ month of the year.A. five B. sixC. seventh D. sixth4. The _ month of a year is December.A. two B. second C. twelve D. twelfth5. - Whats the date today?- Its _ .A. May the fourth B. May fourC. the May fourth D. fourth May6. September is the _ month（月份） of the year.A. eighth B. ninth C. tenth D. eleventh7、 There are _ days in February.A. thirty B. thirty-one C. twenty-eight D. twenty-six8. How many months are there in a year? There are _A. eleven B. twelve C. twenty D. twelfth9. The Changjiang River is _ longest river in China.A. the first B. the second C. the third D. the fourth10. There are months in a year， _ month is February Atwelve；two Btwelve；second C. twelve；the second D. twelfth；the second11. -When is your birthday，Jeff? -My birthdayis_ A. January the thirtieth B. January thirty C. Thirty of January DThirtieth of January12.-What time is it now? -It is A. eleven and thirty Beleven thirty C. thirty eleven Deleventhirty13.There are eight classes in our gradeIm in _ . A. Grade Three，Class Two B. Class Two，Grade Three C. grade three，class two Dclass two，grade three14.In our class of the students _ girls A. three-fifth；are B. threefifth；is C. three-fifths；are Dthree-fifths；is ( )15. May is _ of a year. A. the fifth months B. the fifth month C. the five months D. the five month( )16. -How many English books are there on the table? -There is only _English book on it. A. a B. an C. one D. the( )17. Is Sunday the _ day of the week? A. a B. one C. once D. first( )18. March the _ is Womens Day. A. eighth B. ninth C. tenth D. eight( )19. September is the _month of the year. A. nineth B. ninth C. nine D. the twelveth( )20. December the _ is Christmas. A. twenty-five B. twenty-fifth C. twentieth-five D. twenty-five( )16.-What time is it now? Its _. A.No.6 B.six ten oclock C.half past six