数词

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第三讲数词

一、知识讲解

知识点1 数词：表示数目多少或顺序多少的词叫数词。分类基数词：表示数量的多少序数词：表示顺序

知识点 2 基数词：书写

基数词写法和读法规律总结：

1.十三数到十九数去，后加-teen莫忘记。 2.二十三十至九十，整十之后有-ty。

3.要说“几十几”，中间“-”号别丢弃， 4.百位十位间，and来连接。

5.hundred、thousand、million、billion百、千、百万、十亿前有数字时，这些词不加s ；

无数字时，这些词加s，且带of hundreds of thousands of

例如: 345 three hundred and forty-five； 2340 two thousand three hundred and forty .

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, 21 twenty-one, 22 twenty-two, 23 twenty-three, 24 twenty-four, 25 twenty-five, 26 twenty-six, 20 twenty, 30 thirty, 40 forty, 50 fifty, 60 sixty, 70 seventy, 80 eighty, 90 ninety, 100 a hundred, 1,000 a thousand, 17 seventeen, 27 twenty-seven, 18 eighteen, 19 nineteen, 20 twenty, 28 twenty-eight, 29 twenty-nine, 30 thirty, 知识点3 基数词：用法 1、>1基数词+名词复数：

Eg：1). In January there are thirty-one (31)days. 2). There are fifteen (15) floors in our classroom building. 3). What time is it? It’s ________________(5:25). 2、疑问代词：how many

In January there are thirty-one (31)days. (划线提问) How many days are there in January?

知识点4：基数词：钟表时间表达

1）十二小时计时制：有时要在时刻后面加A.M. P.M. 以示区别午前/午后

1. 先小时后分钟 8:00 eight o’clock, 8:25 eight twenty-five A. 分钟≤30时， 8:25 twenty-five past eight 用past (过了) 9:30 half past nine 时间的表示2. 先分钟，past/to 后小时法--基数词【先分钟past后小时】【60-原分钟to后小时(+1)】 B. 分钟>30时， 8:40 twenty to nine (8+1) 30--half, 15--a quarter 用to (差...到...) 9:45 a quarter to ten (9+1) 8:30 (1) eight twenty-five (2) half past eight 9:15 (1) eight twenty-five (2) a quarter past nine 8:45 (1) eight twenty-five (2) a quarter to nine

知识点5 序数词：书写规范例如: 8去t, 9去e eight---eighth (8th) nine- ninth (9th), ve要用f替 five-fifth, twelve-twelfth, 整十，y=ie, twenty-twentieth, thirty-thirtieth

若是几十几，只变个位就可以 twenty-one-------twenty-first thirty-two thirty-second 序数词变化规律：口诀 1. 1 2 3特殊记， (+th) 2. 8去t, 9去e 3. ve要用f替 4.整十，y=ie, 5.若是几十几，只变个位就可以

1.first (1st) 11 eleventh (11th) 21. twenty-first (21st) 20. twentieth (20th) 2. second (2nd) 12 twelfth, (12th) 22. twenty-second (22nd) 30.thirtieth(30th) 3. third (3rd) 13 thirteenth, 23. twenty-third (23rd) 24. twenty-fourth (24th) 25. twenty-fifth (25th) 26. twenty-sixth (26th) 40. fortieth (40th) 50 fiftieth (50th) 60 sixtieth (60th) 70 seventieth (70th) 4. fourth (4th) 14 fourteenth, 5. fifth (5th) 15 fifteenth, 6. sixth (6th) 16 sixteenth, 7. seventh (7th) 17 seventeenth, 8. eighth (8th) 18 eighteenth, 9. ninth (9th) 19 nineteenth, 27. twenty-seventh (27th) 80 eightieth (80th) 28. twenty-eighth (28th) 29. twenty-ninth (29th) 90 ninetieth --tieth 10. tenth (10th) 20 twentieth (20th) 30. thirtieth (30th)

知识点6 序数词：用法

1、序数词与冠词the：序数词前一般要加定冠词the。如： in the third week 在第三周 on the second floor 在二楼 2、编号的表达法：在英语中，编号可用基数词或序数词：

A: 基数词位于名词后，(相当于专有名词，要大写首字母)：Unit One B：序数词位于名词前并在序数词前加the： the first unit

知识点7 日期的表示法：序数词

1. 月日的表示法: “月日”-“日月” 2.年月日的表达方法：“月日/2014年7月1日日期的表示法 9月1日写 September 1st --序数词读 (September the first)；或 1st September，读作the first of September

二、例题精析

【例题1】翻译下列词组

写作 July 1st, 2014, 或 1s年的读法：用基数词，多分成1. Lesson Eight______________ 2.乘坐5路公交_____________ 3.五年级四班_______________

4.7:30 ___________________ 5. 7:45 ________________ 【答案】 1.第八课 2. by the No.5 bus 3. Class Four, Grade Five 4. half past seven 5. a quarter to eight 【解析】考查数词的用法。

【例题2】写出下列数字的基数词、序数词

1________ ________ 2________ _______ 3________ ________ 5_______ ________

9________ ________ 20________ ________ 51________ ________ 22________ ________

【答案】 1 one, first 2.two, second 3. three, third 5. five, fifth 9 nine, ninth 20 twenty, twentieth 51 fifty-one, fifty-first 22

twenty, twentieth

【解析】考查数词的书写。

【例题3】用数词的适当形式填空 1. We are in Class________（3）.

2. We have________（12）months in a year. December is the _____________（12）one.

3. My birthday is Dec.________（21）.

【答案】 1. Three 2. twelve, twelfth 3. twenty-first 【解析】考查基数词、序数词的用法。

【例题4】 There are two ________people in the meeting room. A. hundred B. hundreds C. hundreds of 【答案】 A

【解析】考查数词的用法：hundred、thousand百千前有数字时，百千无s 。