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1、一、 序数词的定义表示顺序的数词叫做序数词，是由基数词变化而来的。二、序数词变化规律1、2、3，单独记，(onefirst, twosecond, threethird)th要从4加起，8少t，9去e，(eighteighth, nineninth)ve用f来代替，(fivefifth, twelvetwelfth)y用ie来代替，(twentytwentieth, thirtythirtieth)几十几和几百几，只变个位记心里。(twenty-onetwenty-first )思考：hundred（百）的序数词是什么？一、写出下列数字的序数词One eleven twenty-one Two
2、 twelve twenty-two twentyThree thirteen twenty-three thirtyFour fourteen twenty-four fortyFive fifteen twenty-five fiftySix sixteen twenty-six sixtySeven seventeen twenty-seven seventyEight eighteen twenty-eight eightyNine nineteen twenty-nine ninetyTen hundred二、 扩展January, February, March, April, May, June, July, September, October, November, December1. Christmas Day (圣诞节)is _. 2. Labors Day (劳动节)is _. 3. New Years Day (元旦)is _. 4. April Fools Day (愚人节)is _. 5. Tree Planting Day (植树节)is _.6. Childrens Day (儿童节) is _7.Teachers Day (教师节) is _.
