1、Lesson 1First,Second,ThirdUnit 1Days and Monthsone1stfirsttwo2ndsecond3 rdthirdthreefour4thfourthfive5 thfifthsix6thsixth7 thseventhseveneight8 theighthnine9 thninthten10thtenth11 theleventheleventwelve12thtwelfth序数词的含义表示次序的数词叫序数词，是由基数词变化而来的。1.one2.two3.three4.four5.five6.six7.seven8.eight9.nine10.t
2、en11.eleven12.twelve1.first2.second3.third4.fourth5.fifth6.sixth7.seventh8.eighth9.ninth10.tenth11.eleventh12.twelfth基数词序数词（表示顺序的数词）序数词的变化1 one-first2 two-second3 three-third4 其余的序数词都是由基数词后加-th 变化而来的吗？几个特殊变化的序数词 five(五)-fifth(第五)twelve(十二)-twelfth(第十二)eight(八)-eighth(第八)nine(九)-ninth(第九)基变序，有规律；词尾加上th four（四）-fourth(4th)第四six （六）-sixth(6th)第六seven（七）-seventh(7th)第七ten （十）-tenth(10th)第十eleven（十一）-eleventh (11th)第十一基数词变序数词歌基变序，有规律；词尾加上th（fourth，sixth）；一、二、三，特殊记；结尾字母t，d，d（first，second，third）；八减t，九去e（eighth，ninth）；ve要用f替（fifth，twelfth）。This is a race.
