序数词ppt课件

,基数词和序数词,1,表示个数的词叫基数词,1one2two3three4four5five,9nine12twelve20twenty21twenty-one30thirty,2,几十几几十,oneeleventwotwelvetwentythreethirteenthirtyfourfourteenfortyfivefifteenfiftysixsixteensixtysevenseventeenseventyeighteighteeneightyninenineteenninetytenonehundred,3,基数词口诀,基数词不难记，找出规律就容易；0至12样各异，一个一个单独记；后加teen变十几，thirteenfifteen看仔细；18需要看准确，eighteen只有一个；20到90加ty，twentyeighty重点记；forty去掉字母u，thirtyfifty更出奇；十位数后接个位，表示数字几十几；排列顺序不费力，连字符号别丢弃；写到几百几十几，and把百与十系；巧学巧记加努力，hundred是你的好成绩。,4,基数词不难记，找出规律就容易；0至12样各异，一个一个单独记；onetwothreefourfivesixseveneightnineteneleventwelve,5,后加teen变十几，thirteenfifteen看仔细；18需要看准确，eighteen只有一个t；thirteenfourteenfifteensixteenseventeeneighteennineteen,6,20到90加ty，twentyeighty重点记；forty去掉字母u，thirtyfifty更出奇；twentythirtyfortyfiftysixtyseventyeightyninety,7,十位数后接个位，表示数字几十几；排列顺序不费力，连字符号别丢弃；21twenty-one32thirty-two99ninety-nine,8,写到几百几十几，and把百与十系；巧学巧记加努力，hundred是你的好成绩。121onehundredandtwenty-one599fivehundredandninety-nine732sevenhundredandthirty-two,9,序数词,10,基数词(表示个数的词),1one2two3three4four5five6six7seven8eight9nine10ten11eleven12twelve,first(1st)第一,ninth(9th)第九,second(2nd)第二,fourth(4th)第四,third(3rd)第三,fifth(5th)第五,twelfth(12th)第十二,序数词(表示顺序的词),sixth(6th)第六,seventh(7th)第七,eighth(8th)第八,tenth(10th)第十,eleventh(11th)第十一,11,thirteen（十三）-thirteenth(13th)第十三fourteen（十四）-fourteenth(14th)第十四fifteen（十五）-fifteenth(15th)第十五sixteen（十六）-sixteenth(16th)第十六seventeen（十七）-seventeenth(17th)第十七eighteen（十八）-eighteenth(18th)第十八nineteen（十九）-nineteenth(19th)第十九twenty（二十）-twentieth(20th)第二十twenty-one（二十一）-twenty-first(21st)第二十一twenty-two（二十二）-twenty-second(22nd)第二十二twenty-three（二十三）-twenty-third(23rd)第二十三,12,特殊的序数词,one(一)-first(第一)two(二)-second(第二)three(三)-third(第三),13,特殊的序数词,five(五)-fifth(第五)twelve(十二)-twelfth(第十二)eight(八)-eighth(第八)nine(九)-ninth(第九),14,整十的序数词去y加ieth,twenty(二十)-twentieth(第二十)thirty(三十)-thirtieth(第三十)forty(四十)-fortieth(第四十)fifty(五十)-fiftieth(第五十)你能写出sixtyseventyeightyninety的序数词吗？,15,你对了吗？,sixty-sixtiethseventy-seventietheighty-eightiethninety-ninetieth,16,几十几的序数词，十位数不变，个位数变成序数词。,twenty-one(二十一)-twenty-first21st(第二十一)thirty-two(三十二)-thirty-second32nd(第三十二)ninety-nine(九十九)-ninety-ninth99th(第九十九)请写出66834855的序数词,17,你做对了吗？,sixty-six-sisty-sixtheighty-three-eight-thirdforty-eight-forty-eighthfifty-five-fifty-fifth,18,基数词变序数词的口诀,基变序，有规律,词尾加上th,一、二、三很特殊,结尾字母t,d,d(first,second,third),八去t，九去e(eighth,ninth),ve要用f替(fifth,twelfth),ty将y改成ieth(twenty-twentieth),若要碰到几十几,前用基来后用序(twenty-four-twenty-fourth),19,基变序，有规律；词尾加上th,four-fourth(4th)第四six-sixth(6th)第六seven-seventh(7th)第七ten-tenth(10th)第十eleven-eleventh(11th)第十一,20,一、二、三，很特殊，结尾字母t,d,d,one-first(第一)two-second(第二)three-third(第三),21,八去t，九去e，ve要用f替,eight-eighth(第八)nine-ninth(第九),22,ty将y改成ieth,twenty-twentieth(第二十)thirty-thirtieth(第三十)forty-fortieth(第四十)fift