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）
其他基数词的构成：
(1)21 99的两位数,在十位数和个位数之间加连字符构成.如：
53 fifty-three
(2)101—999的三位数,由hundred加and再加两位数或末位数.如：325 three hundred and twenty-five