基数词和序数词表1 one ; first 2 two ; second 3 three ; third 4 four ; fourth 5 five ; fifth 6 six ; sixth 7 seven ; seventh 8 eight ; eighth 9 nine ; ninth 10 ten ; tenth 11 eleven ; eleventh 12 twelve ; twelfth 13 thirteen ; thirteenth 14 fourteen ; fourteenth 15 fifteen ; fifteenth 16 sixteen ; sixteenth 17 seventeen ; seventeenth 18 eighteen ; eighteenth 19 nineteen ; nineteenth 20 twenty ; twentieth 国家国籍对比表国家(国家或地区)语言国民(复数)国籍America 美国/American( -s)AmericanAustralia 澳大利亚/Australian (-s)AustralianBrazil 巴西/Brazilian (-s)BrazilianBritain 英国EnglishBriton (-s)BritishCanada 加拿大/Canadian (-s)CanadianChina 中国ChineseChinese (-)ChineseEgypt 埃及/Egyptian (-s)EgyptianEngland 英国EnglishEnglishman (-men)English21 twenty-one ; twenty-first 23 twenty-three ; twenty-third 25 twenty-five ; twenty-fifth 27 twenty