基数词
1 one | 11 eleven | 21 twenty -one | 40 forty |
2 two | 12 twelve | 22 twenty-two | 50 fifty |
3 three | 13 thirteen | 23 twenty-three | 60 sixty |
4 four | 14 fourteen | 24 twenty-four | 70 seventy |
5 five | 15 fifteen | 25 twenty-five | 80 eighty |
6 six | 16 sixteen | 26 twenty-six | 90 ninety |
7 seven | 17 seventeen | 27 twenty-seven | 百hundred |
8 eight | 18 eighteen | 28 twenty-eight | 千thousand |
9 nine | 19 nineteen | 29 twenty-nine | 百万million |
10 ten | 20 twenty | 30 thirty | 十亿billion |
注意
1.13-19的基数词由3~9后加- teen 构成，特别注意13,15,18的拼写。
2.20-90的整十位数由2~9后加- ty 构成，特别注意20,30,40,50,80的拼写。
3.21-29由十位数20加个位数1~9构成，中间用连字符，其他十位数以此类推。
4．百位数由1~9+ hundred 构成，百位数与十位数之间一般用 and 连接。例如：320 three hundred and twenty 。
5．千位数由1~9+ thousand 构成，其后的百、十、个位数构成和前面相同。例如：2,408 two thousand four hundred and eight
6. hundred , thousand , million 用在具体数字后面时不能加-s,five hundred: 表示不定数量时，要用复数形式+of，如 hundreds of, thousands of, millons of
序数词
1first | 11 eleventh | 21 twenty -first | 40 fortieth |
2second | 12 twelfth | 22 twenty-second | 50 fiftieth |
3 third | 13 thirteenth | 23 twenty-third | 60 sixtieth |
4 fourth | 14 fourteenth | 24 twenty-fourth | 70.seventieth |
5 fifth | 15 fifteenth | 25 twenty-fifth | 80 eightieth |
6 sixth | 16 sixteenth | 26 twenty-sixth | 90 ninetieth |
7 seventh | 17 seventeenth | 27 twenty-seventh | 百hundredth |
8 eighth | 18 eighteenth | 28 twenty-eighth | 千thousandth |
9 ninth | 19 nineteenth | 29 twenty-ninth | 百万millionth |
10 tenth | 20 twentieth | 30 thirtieth | 十亿billionth |
注意
序数词使用时，通常前面要加the，但是有代词限定时就不用the。如 the first day第一天， his second car 他的第二辆车
★数词常见用法
1．日期的表达。如：2025年6月6日 the sixth of June, two thousand and twenty - five
2．用整十基数词的复数表示年代或人的岁数。
如： in the 1860s在19世纪60年代 in her sixties 在她60多岁时
3．编号的读法：名词（首字母大写）＋基数词（首字母大写）= the ＋序数词＋名词。如： Unit Two = the second unit 第2单元
4．百分数的表达。如：63% sixty - three per cent
5．分数的表达：分子用基数词，分母用序数词，即"子基母序"。当分子大于1时，分母后要加﹣ s 。如： one third 1/3 three fifths 3/5
6. 含数词的复合形容词的构成：（1）数词--名词（单数），如 a seven-day holiday
(2) 数词--名词（单数）--形容词，如 a 40-year-old woman.
练习
一.写出下列数字的基数词和序数词
1 | 11 | 21 | 40 |
2 | 12 | 22 | 50 |
3 | 13 | 23 | 60 |
4 | 14 | 24 | 70 |
5 | 15 | 25 | 80 |
6 | 16 | 26 | 90 |
7 | 17 | 27 | 百 |
8 | 18 | 28 | 千 |
9 | 19 | 29 | 百万 |
10 | 20 | 30 | 十亿 |
1 | 11 | 21 | 40 |
2 | 12 | 22 | 50 |
3 | 13 | 23 | 60 |
4 | 14 | 24 | 70 |
5 | 15 | 25 | 80 |
6 | 16 | 26 | 90 |
7 | 17 | 27 | 百 |
8 | 18 | 28 | 千 |
9 | 19 | 29 | 百万 |
10 | 20 | 30 | 十亿 |
二、单项选择
（） 1.There are ________ days in a week.
A. seven B. seventh C. the seven D. the seventh
（） 2. In English, Monday is the ________ day of a week.
A. first B. second C. one D. two
（） 3. ________ people visited the museum during the holiday.
A. Hundred B. Hundreds C. Hundred of D. Hundreds of
（） 4. There are about two ________ students in our grade.
A. thousand B. thousands C. thousand of D. thousands of
（） 5. The ________ lesson in this book is about environmental protection.
A. five B. fifth C. fiveth D. fivth
（） 6. September is the ________ month of the year.
A. nine B. nineth C. ninth D. nineteen
（） 7. My grandparents live on the ________ floor.
A. twelve B. twelveth C. twelfth D. twelves
（） 8. ________ of the students in our class are girls.
A. Two third B. Two thirds C. Second thirds D. Two three
（） 9. I have tried three times, and I want to try a ________ time.
A. Four B. fourth C. the fourth D. fourty
（） 10. This is very different from the situation ______ years ago when people could only use their eyes.
A.thousand B. thousands C. thousands of D. thousand of
三、用括号内所给词的适当形式填空
1. There are ________ (twelve) months in a year.
2. December is the ________ (twelve) month of the year.
3. ________ (thousand) of people come to visit the Great Wall every year.
4. The ________ (nine) month of a year is September.
5. There are about two ________ (hundred) teachers in our school.
6. Today is my little brother's ________ (five) birthday.
7. He got the ________ (one) prize in the math competition.
8. ________ (hundred) of books are sold in this bookstore every day.
9. The ________ (three) question is much easier than the others.
10. We will have a big dinner on my grandma's ________ (sixty) birthday.
答案
一 略
二、单项选择 1-5 ABD A B 6-10 C C BB C
三、用词语的适当形式填空
1. twelve 2. twelfth 3. Thousands 4. ninth 5. hundred 6. fifth 7. first 8. Hundreds 9. third 10. sixtieth
