整数变y 为 i 加eth， 如： twenty→twentieth 带个位的数以个位为序数词， 如： twenty-one twenty-first 序数的数字记法 个位为1→1st,2→2nd,3→3rd，其余的加th，例如31th,43rd,65th 。
5. 1到50用英语怎么写 0到20的英语： zero、one、Two、three、four、five、six、seven、eight、nine、ten、eleven、twelve、 thirteen、fourteen、ffteen、sixteen、seventeen、eighteen、nineteen、twenty 。
21到30的英语： twenty-one、twenty-two、twenty-three、twenty-four、twenty-five、twenty-six、 twenty-seven、twenty-eight、twenty-nine、thirty 。31到40的英语： thirty-one、thirty-two、thirty-treethirty-four、thirty-five、thirty-six、thirty-seven、 thirty-eight 、thirty-nine、forty 。
41到50的英语： forty-one、forty-two、forty-three、forty-four、forty-five、forty-six、forty-seven、 forty-eight、forty-nine、fifty-one 。扩展资料： 英语数词的读法规律： 1、百位与十位之间要加 and；十万位和万位之间， 亿位和千万位之间通常也要加and 。
2、英语用千、百万等单位计数， 大数字从右向左看， 每隔三位划一逗号， 第一个逗号用 thousand， 第二个逗号用 million， 第三个逗号用 billion 。3、hundred、thousand、million 作数词，记录准确数字时， 不用复数， 前面可以加上 one, two， …等其它数词 。
用作名词时复数表示“成…上…”，后面必须要有 of， 前面可以有 some, many, several 等词 。
6. 英语1到50怎么读（写汉字） 英文原文：基数词： 1 one 2 two 3 three 4 four 5 five 6 six 7 seven 8 eight 9 nine 10 ten 11 eleven 12 twelve 13 thirteen 14 fourteen 15 fifteen 16 sixteen 17 seventeen 18 eighteen 19 nineteen 20 twenty 21 twenty-one 22 twenty-two 23 twenty-three 24 twenty-four 25 twenty-five 26 twenty-six 27 twenty-seven 28 twenty-eight 29 twenty-nine 30 thirty 31 thirty-one 32 thirty-two 33 thirty-three 34 thirty-four 35 thirty-five 36 thirty-six 37 thirty-seven 38 thirty-eight 39 thirty-nine 40 forty 41 forty-one 42 forty-two 43 forty-three 44 forty-four 45 forty-five 46 forty-six 47 forty-seven 48 forty-eight 49 forty-nine 50 fifty 序数词： 第1 first 第2 second 第3 third 第4 fourth 第5 fifth 第6 sixth 第7 seventh 第8 eighth 第9 ninth 第10 tenth 第11 eleventh 第12 twelfth 第13 thirteenth 第14 fourteenth 第15 fifteenth 第16 sixteenth 第17 seventeenth 第18 eighteenth 第19 nineteenth 第20 twentieth 第21 twenty-first 第22 twenty-second 第23 twenty-third 第24 twenty-fourth 第25 twenty-fifth 第26 twenty-sixth 第27 twenty-seventh 第28 twenty-eighth 第29 twenty-ninth 第30 thirtieth 第31 thirty-first 第32 thirty-second 第33 thirty-third 第34 thirty-fourth 第35 thirty-fifth 第36 thirty-sixth 第37 thirty-seventh 第38 thirty-eighth 第39 thirty-ninth 第40 fortieth 第41 forty-first 第42 forty-second 第43 forty-third 第44 forty-fourth 第45 forty-fifth 第46 forty-sixth 第47 forty-seventh 第48 forty-eighth 第49 forty-ninth 第50 fiftieth 英式音标：[w?n] [tu?] [θri?] [f??] [fa?v] [s?ks] [?sev（?）n] [e?t] [na?n] [ten] [??lev（?）n] [twelv] [θ???ti?n； ?θ??ti?n] [f???ti?n； ?f??ti?n] [f?f?ti?n； ?f?fti?n] [s?ks?ti?n； ?s?ksti?n] [sev（?）n?ti?n； ?sev（?）nti?n] [e??ti?n； ?e?ti?n] [na?n?ti?n； ?na?nti?n] [?twent?] [?twent??w?n] [?twent??tu?] [t?wenti?θr?i?] [t?wenti?f???r] [?twent?fa?v] [t?wenti?s??ks] [t?wenti?s?evn] [t?wenti??e?t] [t?wenti?n?a?n] [?θ??t?] [?θ??ti?w??n] [?θ??ti?t?u?] [?θ??t?θr?] [?θ??ti?f???r] [?θ??ti?f?a?v] [?θ??ti?s??ks] [?θ??ti?s?evn] [?θ??ti?eit] [?θ??ti?n?a?n] [?f??t?] [?f??t??w?n] [?f??ti?t?u?] [?f??ti?θr?i?] [?f??ti?f???r] [?f??t?fa?v] [?f??ti?s??ks] [?f??ti?s?evn] [?f??ti?eit] [?f??ti?n?a?n] [?f?ft?] [f??st] [?sek（?）nd] [θ??d] [f??θ] [f?fθ] [s?ksθ] [?sev（?）nθ] [e?tθ] [?na?nθ] [tenθ] [??lev（?）nθ] [twelfθ] [?θ??ti?nθ] [?f???ti?nθ] [f?f?ti?nθ] [?s?ks?ti?nθ] [?sev?n?ti?nθ] [?e??ti?nθ] [?na?n?ti?nθ] [?twenti?θ] twenty-first [?twent??sek?nd] [?twent??θ??d] [t?wenti?f???θ] [t?wenti?f??fθ] [t?wenti?s??ksθ] [t?wenti?s?evnθ] [t?wenti??e?tθ] [t?wenti?n?a?nθ] [?θ??t??θ] [?θ??ti?f???st] thirty-second thirty-third [?θ??ti?f???θ] thirty-fifth thirty-sixth thirty-seventh thirty-eighth thirty-ninth [?f??ti?θ] forty-first forty-second forty-third forty-fourth forty-fifth forty-sixth forty-seventh forty-eighth forty-ninth [?f?ft??θ] 美式音标：[w?n] [tu] [θri] [f?r] [fa?v] [s?ks] [?s?vn] [et] [na?n] [t?n] [??l?vn] [tw?lv] [?θ??tin] [?f?r?tin] [?f?f?tin] [?s?ks?tin] [?s?vn?tin] [?e?tin] [?na?n?tin] [?tw?nti] [?twent??w?n] [?twent??tu?] [t?wenti?θr?i?] [t?wenti?f???r] [?twent?fa?v] [t?wenti?s??ks] [t?wenti?s?evn] [t?wenti??e?t] [t?wenti?n?a?n] [?θ?ti] [?θ??ti?w??n] [?θ??ti?t?u?] [?θ??t?θr?] [?θ??ti?f???r] [?θ??ti?f?a?v] [?θ??ti?s??ks] [?θ??ti?s?evn] [?θ??ti?eit] [?θ??ti?n?a?n] [?f?rti] [?f??t??w?n] [?f??ti?t?u?] [?f??ti?θr?i?] [?f??ti?f???r] [?f??t?fa?v] [?f??ti?s??ks] [?f??ti?s?evn] [?f??ti?eit] [?f??ti?n?a?n] [?f?fti] [f?st] [?s?k?nd] [θ?d] [f?rθ] [f?fθ] [s?ksθ] [?s?v?nθ] [etθ] [na?nθ] [t?nθ] [??l?vnθ] [tw?lfθ] [?θ?tinθ] [?f???ti?nθ] [?f?f?tinθ] [?s?ks?tinθ] [?s?vn?tinθ] [?e?tinθ] [?na?n?tinθ] [?twenti?θ] twenty-first [?twent??sek?nd] [?twent??θ??d] [t?wenti?f???θ] [t?wenti?f??fθ] [t?wenti?s??ksθ] [t?wenti?s?evnθ] [t?wenti??e?tθ] [t?wenti?n?a?nθ] [?θ?t??θ] [?θ??ti?f???st] thirty-second thirty-third [?θ??ti?f???θ] thirty-fifth thirty-sixth thirty-seventh thirty-eighth thirty-ninth [?f??ti?θ] forty-first forty-second forty-third forty-fourth forty-fifth forty-sixth forty-seventh forty-eighth forty-ninth [?f?ft??θ] 。