1到31的基数词分别是:
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-first)。
以下是基数词和序数词对照表:1
1 one first 1st 2 two second 2nd 3 three third 3rd 4 four fourth 4th 5 five fifth 5th 6 six sixth 6th 7 seven seventh 7th 8 eight eighth 8th 9 nine ninth 9th 10 ten tenth 10th 11 eleven eleventh 11th 12 twelve twelfth 12th 13 thirteen thirteenth 13th 14 fourteen fourteenth 14th 15 fifteen fifteenth 15th 16 sixteen sixteenth 16th 17 seventeen seventeenth 17th 18 eighteen eighteenth 18th 19 nineteen nineteenth 19th 20 twenty twentieth 20th 21 twenty-one twenty-first 21st 22 twenty-two twenty-second 22nd 23 twenty-three twenty-third 23rd 24 twenty-four twenty-fourth 24th 25 twenty-five twenty-fifth 25th 30 thirty thirtieth 30th 40 forty fortieth 40th 50 fifty