前為基數詞，後為序數詞 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 eigteenth 19:nineteen nineteenth 20:twenty twentieth 21:twenty-one twenty-first 22:twenty-two twenty-second 23:twenty-three twenty-third 24:twenty-four twenty-fourth 25:twenty-five twenty-fifth 26:twenty-six twenty-sixth 27:twenty-seven twenty-seventh 28:twenty-eight twenty-eighth 29:twenty-nine twenty-ninth 30:thirty thirtieth

第1 first 1st 第2 second 2nd 第3 third 3rd 第4 fourth 4th 第5 fifth 5th 第6 sixth 6th 第7 seventh 7th 第8 eighth 8th 第9 ninth 9th 第10 tenth 10th 第11 eleventh 11th 第12 twelfth 12th 第13 thirteenth 13th 第14 fourteenth 14th 第15 fifteenth 15th 第16 sixteenth 16th 第17 seventeenth 17th 第18 eighteenth 18th 第19 nineteenth 19th 第20 twentieth 20th 第21 twenty-first 21st 第22 twenty-second 22nd 第23 twenty-third 23rd 第24 twenty-fourth 24th 第25 twenty-fifth 25th 第26 twenty-sixth 26th 第27 twenty-seventh 27th 第28 twenty-eighth 28th 第29 twenty-ninth 29th 第30 thirtieth 30th