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,30 thirty,40 forty,50 fifty,60 sixty,70 seventy,80 eighty,90 ninety,
100 a hundred,1,000 a thousand,1,000,000 a million,1,000,000,000 a billion.
基数词 1-12 是独立单词,需逐个记忆.基数词13 - 19是个位数词的词干后加-teen 构成.其中 thirteen,fifteen,eighteen,变化不规则.基数词 20 ━90 是在十位数词后面加 -ty 构成.基数词 21 ━ 99 是在十位数词后面加上个位数词合成,中间加上连字符 " - " .例如:
21 twenty -one 95 ninety - five
基数词三位以上的数词,在百位和十位之间,一般要用连词"and ".例如:
132 one hundred and thirty-two.
1340 one thousand three hundred and forty
表示"万"的词英语中没有.如1万可用10千来表示.ten thousand.30万可用 three hundred thousand 来表示.