爱华网一、基数词的写法
0 zero;
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
30 thirty
32 thirty-two
40 forty
50 fifty
60 sixty
70 seventy
80 eighty
90 ninety
100 one hundred
101 one hundred and one
156 one hundred and fifty-six
192 one hundred and ninety-two
200 two hundred
300 three hundred
400 four hundred
500 five hundred
600 six hundred
700 seven hundred
800 eight hundred
900 nine hundred
1,000 one thousand
1,001 one thousand and one
1,300 thirteen hundred;one thousand and three hundred
2,000 two thousand
2,034 two thousand and thirty-four
6,502 six thousand five hundred and two
38,000 thirty-eight thousand
45,672 forty-five thousand six hundred and seventy-two
500,000 five hundred thousand
1,000,000 one million
3,123,400 three million,one hundred and twenty-three thousand four hundred
8,000,000 eight million
47,000,000 forty-seven million
900,000,000 nine hundred million
1,000,000,000:a billion,one billion
二.、表示分数时分子用基数词，分母用序数词：
1/3 one-third（三分之一） , 1/5 就是one-fifth, 2/3 two-thirds
3/4 three-fourths（四分之三） , 3/37 three and three-sevenths（三十七分之三） (注意：分子为2及以上的，则分母要加S)
三、1至20的序数词
one— first
two— second/next
three— third
four-fourth
five— fifth
six— sixth
seven— seventh
eight—eighth
nine—ninth
ten— tenth
eleven— eleventh
twelve— twelfth
thirteen —thirteenth
fourteen—fourteenth
fifteen—fifteenth
sixteen—sixteenth
seventeen—seventeenth
eighteen—eighteenth
nineteen—nineteenth
twenty—twentieth
四、英语中基数词变序数词方法——口诀
口诀
解说
举例子
基变序，有规律 后面th加上去
在数词后面加th
four → fourth
一二三，特殊记 后面字母t,d,d
one, two, three特殊变
first，second，third
八去t，九去e
eight去掉t，nine去掉e
eight → eighth
nine → ninth
f来把ve替
five和twelve的ve要变成f
five→ fifth
twelve→ twelfth
若是遇到几十几 只变个位就可以
两位数或两位以上数字只变个位
thirty-five → thirty-fifth
forty-six→ forty-sixth
序数词前要加the 我们一定要牢记
叙述词前必须加the
the first day
the twelfth words
the nineth page
