基数词变序数词的规律.docx

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twelfth。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"o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,ktft11"thirteenth"->"thirteenth-teen"->"thirteenth-teen"o 如果基词是20-90的数字，则加-ty,比如"fortieth"->"fortieth-ty"->"fortiethelfth-st"->"twelfth-st"0 如果基词是13-19的数字，则加-teen,tt11"thirteenth"->"thirteenth-teen"->"thirteenth-teen"o 如果基词是20-90的数字，贝U加-ty,比如“fortieth”->“fortieth-ty”->“fortieth-ty”。 如果基词是I-19的数字，贝!j加-th,tk11"second"->"second-th"->"second-th"o 如果基词是,O,则加“zero"，比如“hundredth”->"hundredth-zero"->"hundredth-zero"0 如果基词是T',则加“first"，比如"ten-ty”。 如果基词是I-19的数字，则加-th,tkl"second"->"second-th"->"second-th"o 如果基词是“0”,则加“zero”，比如“hundredth”->"hundredth-zero*'->"hundredth-zero"« 如果基词是T',则加“first”,比如“tenth”->“tenth-first”->“tenth-first”。 如果基词是"2",则加“SeConC,tt"twelfth"->"twelfth-second"->"twelfth-second"0 如果基词是“3",则加“third“，比如“third”->“third-third”->“thirdth”“tenth-first”->"tenth-first"o 如果基词是"2",则加“second",tt"twelfth"->"twelfth-second"->"twelfth-second"o 如果基词是“3",则加“third”，比如“third”>“third-third”->“third-third”。 如果基词是“4”,贝WlTfourth”,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-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”SiXthTiXth”->“sixth-sixth”。 如果基词是"7",则力口"seventh”,比如"seventh">"seventh-seventh"->"seventh-seventh"o 如果基词是“8“，则加“eighth“，比如“6“，则加“SiXth”，tk"sixth"->"sixth-sixth"->"sixth-sixth 如果基词是"7",则加“seventh"，比如"seventh"->"seventh-seventh"->"seventh-seventh"o 如果基词是"8",则加"eighth”,½11"eighth"->"eighth-eighth"->"eighth-eighth,o 如果基词是“9”,则加“ninth”,½"ninth->"ninth-ninth"->"ninth-ninth"o 如果基词是“1-10”，则加“thefirst”，比如“first”->“thefirst"，eighth"->"eighth-eighth"->"eighth-eighth"o 如果基词是“9",则加“ninth",½11,ninth"->"ninth-ninth"->"ninth-ninth% 如果基词是“1-10“，则加“thefirst"，比如“first”->“thefirst"，"second"->"thesecond","third"->"thethird","fourth"->"thefourth","fifth"->"thefifth","sixth"->"thesixth","seventh"->"theseventh","eighth"->"theeighth","ninth""second"->"thesecond","third"->"thethird","fourth"->"thefourth","fifth'*->"thefi代h“，"sixth"->"thesixth","seventh"->"theseventh","eighth"->"theeighth","ninth"->"theninth'*,"tenth"->"thetenth","eleventh"->"theeleventh","twelfth"->"thetwelfth","thirteenth"->"thethirteenth","fourteenth"->"thefourteenth'1,"fifteenth"->"thefifteenth->"theninth","tenth"->"thetenth","eleventh"->"theeleventh","twelfth"->"thetwelfth","thirteenth"->"thethirteenth","fourteenth"->"thefourteenth","fifteenth"->"thefifteenth","sixteenth"->"thesixteenth","seventeenth"->"theseventeenth","eighteenth"->"theeighteenth","nineteenth"->"thenineteenth","twentieth"->"thetwentieth","thirtieth"->"thethirtieth",","sixteenth"->"thesixteenth","seventeenth"->"theseventeenth","eighteenth"->"theeighteenth","nineteenth"->"thenineteenth","twentieth"->"thetwentieth","thirtieth"->"thethirtieth","fourtieth"->"thefourtieth","fiftieth"->"thefiftieth","sixtieth"->"thesixtieth","seventieth"->',theseventieth","eightieth"->"theeightieth","ninetieth"->"theninetieth","ahundred"fourtieth"->"thefourtieth","fiftieth"->"thefiftieth","sixtieth"->"thesixtieth","seventieth"->"theseventieth","eightieth"->"theeightieth","ninetieth"->"theninetieth","ahundredth"->"thefirsthundredth"o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"->"thetwentieth"->"thefirsthundredth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"ieth"->"the第20th",但是"twentieth"->"thetwentieth"；4 .百位以上的基数词在词尾加"ousth"->"thefirstthousandth”,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“th”。注意：IOoo-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”->"thefirstthousandth",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：Iooo-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"->"thehundredth"；2 .两位数的个位数为基数词的"tenth"->"thetenth"；3 .百位数的基数词保持不变。4 .小数的基数词表示方法：1/2one-half,1/4one-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"->"thehundredth"；2 .两位数的个位数为基数词的"tenth"->"thetenth"；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W。例：one-hundred->onehundredthone-thousand->onethousandthquarter,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->onehundredthone-thousand->onethousandthtwelve-year->twelfthtwenty-two-year-