基数词（1-20）
基数词表示数量，是英语中最基础的数字表达。
| 数字 | 英文 | 数字 | 英文 |
|---|---|---|---|
| 1 | one | 11 | eleven |
| 2 | two | 12 | twelve |
| 3 | three | 13 | thirteen |
| 4 | four | 14 | fourteen |
| 5 | five | 15 | fifteen |
| 6 | six | 16 | sixteen |
| 7 | seven | 17 | seventeen |
| 8 | eight | 18 | eighteen |
| 9 | nine | 19 | nineteen |
| 10 | ten | 20 | twenty |
整十数字
| 数字 | 英文 | 数字 | 英文 |
|---|---|---|---|
| 20 | twenty | 60 | sixty |
| 30 | thirty | 70 | seventy |
| 40 | forty | 80 | eighty |
| 50 | fifty | 90 | ninety |
| 100 | one hundred |
非整十数字
非整十数字由整十数加个位数构成，中间用连字符连接：
- 21 = twenty-one
- 35 = thirty-five
- 48 = forty-eight
- 99 = ninety-nine
📝 例子
I have five books. 我有五本书。
There are twenty-three students in my class. 我们班有23名学生。
My grandmother is seventy years old. 我奶奶70岁了。
序数词
序数词表示顺序，通常由基数词变化而来：
- 1st = first 第一
- 2nd = second 第二
- 3rd = third 第三
- 4th = fourth 第四
- 5th = fifth 第五
序数词前通常加定冠词 the：
📝 例子
Today is the first day of school. 今天是开学第一天。
I live on the third floor. 我住在三楼。
December is the twelfth month. 十二月是第十二个月。
数学运算表达
| 运算 | 表达 | 例句 |
|---|---|---|
| 加 | plus / and | Two plus three is five. |
| 减 | minus | Ten minus four is six. |
| 乘 | times | Three times two is six. |
| 除 | divided by | Eight divided by two is four. |
| 等于 | equals / is | Two plus two equals four. |
✏️ 练习题
- 写出下列数字的英文：15, 32, 50, 88, 100
- 用英语表达：3 + 5 = 8
- 翻译：我排在第十位。
✅ 参考答案
- fifteen, thirty-two, fifty, eighty-eight, one hundred
- Three plus five is eight. / Three and five equals eight.
- I am in the tenth place.
学习建议
- 每天数数1-20，强化记忆
- 用英语说出电话号码、门牌号等
- 购物时用英语计算价格和数量
- 玩数字游戏，如英语版"数七"游戏
数字是英语交流的重要工具，多加练习就能熟练运用。