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【题目】按要求写出对应的单词。

基数词 序数词 简写

112 ____________ _______________ ____________

220 ____________ _______________ ____________

330 ____________ _______________ ____________

421 ____________ ______________ ____________

523 _____________ ______________ ____________

【答案】

1 twelve twelfth l2th

2 twenty twentieth 20th

3 thirty thirtieth 30th

4 twenty-one twenty-first 21st

5 twenty-three twenty-third 23rd

【解析】

基数词变序数词的规律:

onefirsttwosecond threethird这三个词变化特殊,要单独记;

eighteighthnineninth,八去t 九去e后再加-th

fivefifthtwelvetwelfth,五、十二把ve换成f再加-th

twentytwentieththirtythirtieth...整十先把词尾y改为ie再加-th

两位数时则十位数用基数词,个位数用序数词,如: twenty-first

序数词可以用缩写形式来表示,主要缩写形式有:1st2nd3rd为特殊形式,其它的都是阿拉伯数字后加th

112的英文是twelvetwelve变为序数词要把ve换成f后再加-th,即twelfth,简写是直接写数字+th,即12th,故答案为twelvetwelfth12th

220的英文是twentytwenty变为序数词先把词尾y改为ie再加-th,即twentieth,简写是直接写数字+th,即20th,故答案为twentytwentieth20th

330的英文是thirtythirty变为序数词先把词尾y改为ie再加-th,即thirtieth,简写是直接写数字+th,即30th,故答案为thirtythirtieth30th

421的英文是twenty-onetwenty-one是两位数,两位数变为序数词时则十位数用基数词,个位数用序数词,one的序数词是first,即twenty-first

简写是直接写数字+st,即21st,故答案为twenty-onetwenty-first21st

523的英文是twenty-threetwenty-three是两位数,两位数变为序数词时则十位数用基数词,个位数用序数词,three的序数词是third,即twenty-third

简写是直接写数字+rd,即23rd,故答案为twenty-onetwenty-third23rd

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