基数词变序数词的规律

基数词变序数词的规律首先,基数词变序数词的规则是按照字母表顺序，一般而言，以t开头的基数词three,twenty,twelve等变成序数词时，要在单词前加上th,例如three变成third,twenty变成twentieth,twelve变成twelfth0其次，以f开头的基数词four,five,forty,fifty等变成序数词时，要在单词前加上rst,例如four变成fourth,five变成fifth,forty变成fortieth,fifty变成fiftieth方法在英语中，基数词变为序数词的方法是•基词加上一个表示“第”的词缀“-th”,比如“first”-first-th-first-th%・如果基词是1-12的数字，则加-st,比如“twelfth”比如“first”・”first・th”・first-th o•如果基词是1-12的数字,则加-st,比如”twelfth”-twelfth-st”-”twelfth-st”•如果基词是13-19的数字，则加-teen,比如“thirteenth-thirteenth-teen-thirteenth-teeno•如果基词是20-90的数字,则加-ty,比如fortieth-fortieth-ty-fortiethelfth-st-twelfth-stuo•如果基词是13-19的数字,则加-teen,比如“thirteenth”-thirteenth-teen”-thirteenth-teeno•如果基词是20-90的数字，则加-ty,比如fortieth-fortieth-ty-fortieth-ty•如果基词是1-19的数字，贝!J加-th,比如second-second-th-second-th”•如果基词是“0，则加“zero”，比如“hundredth”-hundredth-zero-hundredth-zero%•如果基词是“1“，则加“first，比如ten-ty”•如果基词是1-19的数字，则加-th,Ittursecond-second-th-second-tho•如果基词是“0,则加zero,ktjnhundredth-hundredth-zero-hundredth-zero0•如果基词是“1，则加“first”,比如“tenth“tenth-first”-tenth-first”•如果基词是2,贝i］加second,比如twelfth-twelfth-second-twelfth-second•如果基词是“3”,则加“third，比如，hird”-“third-third”-“thirdth”-“tenth-first”-tenth-first%•如果基词是“2”,贝ij加“second”，bt illtwelfth-twelfth-second-twelfth-second0•如果基词是“3,则加“third，比如“third”-“third-third”-“third-third”•如果基词是4，则加“fourth”,比如fourth-fourth-fourth-fourth-fourth•如果基词是“5“，则加“fifth，比如fifth“fifth-fifth”-“fifth-fi代h”•如果基词是-third”•如果基词是“4“，则加“fourth,比如fourth”・“fourth-fourth”-“fourth-fourth”•如果基词是5”,则加“fifth，比如“fifth”-“fifth-fifth”-“fifth-fifth”•如果基词是“6“，则加“sixth，比如“sixth”-sixth-sixth”-“sixth-sixth”•如果基词是“7,则加“seventh，比如“seventh”-seventh-seventh-seventh-seventh,,•如果基词是“8,则加“eighth，比如““6，贝!|加“sixth”,比如“sixth”-“sixth-sixth”-sixth-sixtho•如果基词是7,则加seventh,比如seventh-seventh-seventh-seventh-seventho•如果基词是8,则加eighth,比如eighth-eighth-eighth-eighth-eighth•如果基词是“9，则加“ninth”,比如“ninth”-“ninth-ninth”-“ninth-ninth”•如果基词是“1-10”，则加“the first，比如“first”-“the first，eighth-eighth-eighth-eighth-eightho•如果基词是9,则加ninth，比如ninth-ninth-ninth”-ninth-ninth•如果基词是“1-10”，则加“the first，比如“first”-“the first，second-the second,third-the third,fourth-the fourth,fifth-the fifth,sixth-the sixth,seventh-theseventh,eighth-the eighth,ninthsecond-the second,third-the third,fourth-the fourth,fifth-the fifth,sixth-the sixth,seventh-the seventh,eighth-theeighth,ninth-the ninth,tenth-the tenth,eleventh-the eleventh,twelfth-thetwelfth,thirteenth-the thirteenth,fourteenth-the fourteenth,fifteenth-the fifteenth-the ninth,tenth-the tenth,eleventh-the eleventh,twelfth-the twelfth,thirteenth-the thirteenth,fourteenth-the fourteenth,fifteenth-the fifteenth,sixteenth-the sixteenth,seventeenth-the seventeenth,eighteenth-the eighteenth,nineteenth-the nineteenth,twentieth-the twentieth,thirtieth-the thirtieth,,sixteenth-the sixteenth,seventeenth-the seventeenth,eighteenth-the eighteenth,nineteenth-the nineteenth,twentieth-the twentieth,thirtieth-the thirtieth,fourtieth-the fourtieth,fiftieth-the fiftieth,sixtieth-the sixtieth,seventieth-theseventieth,eightieth-the eightieth,ninetieth-the ninetieth,a hundredfourtieth-thefourtieth,fiftieth-the fiftieth,sixtieth-the sixtieth,seventieth-the seventieth,eightieth-theeightieth,ninetieth-the ninetieth,a hundredth-the firsthundredth0基数词在变为序数词时，规则如下

1.1-10的基数词与序数词在拼写上保持一致；

2.11-19的基数词在词尾加th；

3.20-90的基数词，词尾加ieth“-”the第20th，但是twentieth-the twentieth-the firsthundredth©基数词在变为序数词时，规则如下

1.1-10的基数词与序数词在拼写上保持一致；

1.11-19的基数词在词尾加th；

3.20-90的基数词,词尾加eth-the第20th,但是twentieth-the twentieth；

4.百位以上的基数词在词尾加ousth-the firstthousandth,但是tenthousand-thetenthousandth；

5.字母w,y,x,ch,sh作为词首的基数词，变为序数词时需要加th0注意1000-9999是两位数，变序数词时，十位th；

6.百位以上的基数词在词尾加ousth-the firstthousandth，但是tenthousand-thetenthousandth；

7.字母w,y,x,ch,sh作为词首的基数词，变为序数词时需要加“th”注意1000-9999是两位数，变序数词时，十位数和个位数需要分开处理

1.两位数的十位数为基数词的hundredth-the hundredth；

2.两位数的个位数为基数词的tenth”-the tenth；

3.百位数的基数词保持不变

4.小数的基数词表示方法1/2-one-half,1/4・one-数和个位数需要分开处理

1.两位数的十位数为基数词的hundredth-the hundredth；

2.两位数的个位数为基数词的tenth”-the tenth”；

3.百位数的基数词保持不变

4.小数的基数词表示方法1/2-one-half,1/4-one-quarter,1/8-one-eighth,3/4-three-quarters基数词变序数词的规律

1.除了th,在基数词后添加“th”

2.十位数是th,在其后面添加th%例one-hundred-one hundredthone-thousand-one thousandthquarter,1/8-one-eighth,3/4-three-quarters基数词变序数词的规律

1.除了th,在基数词后添加th%

2.十位数是th,在其后面添加“th”例one-hundred-one hundredthone-thousand-one thousandthtwelve-year-twelfthtwenty-two-year-twenty-secondtwenty-five-hours-twenty-fifththirty-six-day-thirty-sixthhundred-and-thirty-two-hundredth andthirty-second thousand-and-fifty-four-thtwelve-year-twelfthtwenty-two-year-twenty-secondtwenty-five-hours-twenty-fifththirty-six-day-thirty-sixthhundred-and-thirty-two-hundredth andthirty-second thousand-and-fifty-four-thousandth andfifty-fourth ten-thousand-and-fifty-tenthousandth and fifty-fifth ten-million-and-one-ten-milliondoneten-thousand-million-and-one-ten-milliondonefive-hundred-and-one-five-hundredth andone fiveousandthandfifty-fourthten-thousand-and-fifty-tenthousandth andfifty-fifth ten-million-and-one-ten-milliondoneten-thousand-million-and-one-ten-milliondonefive-hundred-and-one-five-hundredth andonefive-thousand-and-five-fivethousandth andfifthfive-million-and-five-five-milliondonefive-thousand-million-and-five-five-milliondonetwo-hundred-and-forty-four-twenty-twenty-forthtwo-thousand-and-seven-two-thousand-and-five-fivethousandth andfifthfive-million-and-five-five-milliondonefive-thousand-million-and-five-five-milliondonetwo-hundred-and-forty-four-twenty-twenty-forthtwo-thousand-and-seven-two-thousandseventhtwo-thirds-fifty-six-thirds-two-third-six-thirdtwenty-nine-point-nine-twenty-nine-ninefive-thirty-one-fifty-one-onetwo-sevenths-four-two-seventh-fourone-two--thousandseventhtwo-thirds-fifty-six-thirds-two-third-six-thirdtwenty-nine-point-nine-twenty-nine-ninefive-thirty-one-fifty-one-onetwo-sevenths-four-two-seventh-fourone-two-one-twofive-eleven-five-elevensix-seven-six-seventen-fifths-ten-fifthfive-twelfths-five-twelfthfour-ninths-four-ninthone-ninth-one-ninthtwo-ninths-one-twofive-eleven-five-elevensix-seven-six-seventen-fifths-ten-fifthfive-twelfths-five-twelfthfour-ninths-four-ninthone-ninth-one-ninthtwo-ninths-two-ninththree-ninths-three-ninthfive-ninths-five-ninthsix-ninths-six-ninthseven-ninths-seven-ninthten-ninths-ten-nintheleven-twelfths-eleven-twelfthtwo-ninththree-ninths-three-ninthfive-ninths-five-ninthsix-ninths-six-ninthseven-ninths-seven-ninthten-ninths-ten-nintheleven-twelfths-eleven-twelfthtwelve-twelfths-twelve-twelfththirteen-thirteenths-thirteen-thirteenth fourteen-fourteenths-fourteen-fourteenthfifteen-fifteenths-fifteen-fifteenthsixteen-sixteenths-sixteen-sixte twelve-twelfths-twelve-twelfth thirteen-thirteenths-thirteen-thirteenth fourteen-fourteenths-fourteen-fourteenth fifteen-fifteenths-fifteen-fifteenthsixteen-sixteenths-sixteen-sixteenthseventeen-seventeenths-seventeen-seventeenth eighteen-eighteenths-eighteen-eighteenthnineteen-nineteenths-nineteen-nineteenth twenty-twentieths-twenty-twentieththirty-thirtieths-thirty-thirtienthseventeen-seventeenths-seventeen-seventeentheighteen-eighteenths-eighteen-eighteenthnineteen-nineteenths-nineteen-nineteenth twenty-twentieths-twenty-twentieththirty-thirtieths-thirty-thirtieth forty-fortieths-forty-fortieth fifty-fiftieths-fifty-fiftiethsixty-sixtieths-sixty-sixtieth seventy-seventieths-seventy-seventieth eighty-eightieths-eighty-eightieth ninety-ninetethforty-fortieths-forty-fortieth fifty-fiftieths-fifty-fiftieth sixty-sixtieths-sixty-sixtiethseventy-seventieths-seventy-seventieth eighty-eightieths-eighty-eightieth ninety-ninetieths-ninety-ninetieth thousand-thousandths-thousand-thousandth ten-thousandths-ten-thousandth fifteen-fifteenths-fifteen-fifteenth twenty-twentieths-twenty-twentieththirty-thirtieths-thirieths-ninety-ninetieth thousand-thousandths-thousand-thousandthten-thousandths-ten-thousandth fifteen-fifteenths-fifteen-fifteenth twenty-twentieths-twenty-twentieth thirty-thirtieths-thirty-thirtieth forty-fortieths-forty-fortieth fifty-fiftieths-fifty-fiftieth sixty-sixtieths-sixty-sixtieth seventy-seventieths-seventy-seventietheighty-eightieths-eighty-eightiethnity-thirtiethforty-fortieths-forty-fortiethfifty-fiftieths-fifty-fiftiethsixty-sixtieths-sixty-sixtiethseventy-seventieths-seventy-seventietheighty-eightieths-eighty-eightiethninety-ninetieths-ninety-ninetieth200thousand-two hundredthousand规律基数词变序数词的规则

1.一般地，单个基数词后面直接加-th.例如one-first;two—second;three-*third;four-*fourth;five-*fifth;six—sixth;seven-*seventh;eight-*eighth;nine-first;twof second;three-*third;fourf fourth;five—fifth;six-sixth;seven-seventh;eightf eighth;nine-*ninth;ten—tenth;eleven-*eleventh;twelve-twelfth;thirteen-*thirteenth;fourteen-*fourteenth;fifteen-*fifteenth;sixteenf sixteenth;seventeen-*seventeenth;eighteen-*eighteenth;nineteen-*nineteenth;twenty-*twentieth;twenty-oneninth;ten—tenth;eleven-*eleventh;twelve-*twelfth;thirteen-*thirteenth;fourteen ffourteenth;fifteen-*fifteenth;sixteerf sixteenth;seventeen-*seventeenth;eighteen-eighteenth;nineteen-nineteenth;twenty-*twentieth;twenty-one-*twenty-first;twenty-two-twenty-second;twenty-three-*twenty-third;twenty-four-*twenty-fourth;twenty-five-twenty-fifth;twenty-six-*twenty-sixth;twenty-seven-twenty-seventh;twenty-eight-twenty-eighth;twent-*twenty-first;twenty-two-*twenty-second;twenty-three-*twenty-third;twenty-four-*twenty-fourth;twenty-five-*twenty-fifth;twenty-six-*twenty-sixth;twenty-seventwenty-seventh;twenty-eight-*twenty-eighth;twenty-nine-*twenty-ninth。