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1、基数词:one, two , three, four, five 序数词:第一,第二,第三,第四, 第五. 口诀: 一二三单独记。 基数词 序数词 one first 1 st two second 2 nd three third 3 rd 八去 t,九去 e,ve 要用 f 替。 基数词 序数词 five fifth 5 th eight eighth 8 thnine ninth 9 thtwelve twelfth 12 th整十基数变序数,先把 ty 变成 tie 基数词 序数词 twenty twentieth 20 ththirty thirtieth 30 thforty fo
2、rtieth 40 th要是遇到两位数,十位基数个位序,th 最后加上去。 基数词 序数词 twenty-one twenty-first 21 st twenty-two twenty-second 22 ndtwenty-three twenty-third 23 rdtwenty-four twenty-fourth 24 thtwenty-five twenty-fifth 25 thtwenty-six twenty-sixth 26 thPractice 请把下面的基数词换成序数词并写出缩写 one- two- three- four- five- eight- nine- twelve thirteen- twenty- twenty-one twenty-two thirty-three- thirty-five- thirty-seven- forty-