1 one 2 two 3 three 4 four 5 five 6 six 7 seven 8 eight 11 eleven 12 twelve 13 thirteen 14 fourteen 15 fifteen 16 sixteen 17 seventeen 18 eighteen 20 twenty 30 thirty 40 forty 50 fifty 60 sixty 70 seventy 80 eighty 100 a/one hundred 1,000 a/one thousand 1,000,000 a/one million 1,000,000,000 a/ one billion （美） a/one thousand
9 nine 10 ten 19 nineteen 90 ninety
million（英）
其他基數(shù)詞的構(gòu)成：
(1)21 99的兩位數(shù),在十位數(shù)和個(gè)位數(shù)之間加連字符構(gòu)成.如：
53 fifty-three
(2)101—999的三位數(shù),由hundred加and再加兩位數(shù)或末位數(shù).如：325 three hundred and twenty-five