知识库
先学知识点，再做题检验。当前：数词
01. 名词 (8个)
02. 冠词 (5个)
03. 代词 (4个)
04. 形容词与副词 (6个)
05. 介词 (6个)
06. 连词 (4个)
07. 动词时态 (19个)
08. 被动语态 (7个)
09. 情态动词 (4个)
10. 非谓语动词 (8个)
11. 定语从句 (7个)
12. 名词性从句 (8个)
13. 状语从句 (7个)
14. 虚拟语气 (5个)
15. 特殊句式 (8个)
16. 数词 (6个)
17. 直接引语与间接引语 (4个)
18. 句子成分与结构 (7个)
19. 构词法 (4个)
98. 张俊杰英语全语法体系（综合参考） (31个)
99. 英语全语法之简单原则 (12个)
基数词与序数词
基数词写法与读法
重点 难度 1/3
基数词 1-100
1-12 单独记忆：one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve
13-19 以-teen结尾：thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen
注意：thir-teen, fif-teen, eigh-teen
20-90 以-ty结尾：twenty, thirty, forty, fifty, sixty, seventy, eighty, ninety
注意：twen-ty, thir-ty, for-ty, fif-ty
21-99 十位+连字符+个位：twenty-one, thirty-two, ninety-nine
基数词 100+
100 = a/one hundred
101 = a/one hundred and one
1,000 = a/one thousand
1,001 = a/one thousand and one
1,234 = one thousand two hundred and thirty-four
1,000,000 = a/one million
1,000,000,000 = a/one billion
hundred/thousand/million 的用法
* 具体数字后不加s：three hundred, five thousand, two million
* 表概数加s+of：hundreds of, thousands of, millions of
* 比较：two hundred students（200个学生）/ hundreds of students（几百个学生）
序数词
* first, second, third 特殊记忆
* 4-19加-th：fourth, fifth（fiv→fif）, sixth, seventh, eighth（只加h）, ninth（去掉e）, tenth, eleventh, twelfth（f）, thirteenth...
* 第几十：把y变ie加th：twentieth, thirtieth, fortieth, fiftieth
* 第几十几：十位用基数词个位用序数词：twenty-first, thirty-second
* 缩写：1st, 2nd, 3rd, 4th, 5th, 20th, 21st, 22nd, 23rd
数词的语法功能
难度 1/3
数词作主语
Three of us are from Beijing.
The first is the most important.
数词作宾语
I need two.（两个）
Give me the second.（第二个）
数词作定语
There are thirty students in the class.
This is my first visit.
数词作表语
She is twelve years old.
I am the third in line.
数词作同位语
We two will go together.
You three need to stay.
注意：基数词与序数词的位置
* the first two chapters（前两章）——序数词在前
* Chapter Two / the second chapter（第二章）——两种表达
分数、小数与百分数
分数与百分数的表达
重点 难度 2/3
分数表达法
分子用基数词，分母用序数词：
* 分子为1时：a/one + 单数序数词
1/3 = a/one third
1/4 = a/one quarter / fourth
1/2 = a/one half（不是a second）
* 分子大于1时：基数词 + 复数序数词
2/3 = two thirds
3/4 = three quarters / three fourths
5/8 = five eighths
带分数的表达
整数 + and + 分数：
* 2 1/2 = two and a half
* 3 2/3 = three and two thirds
百分数的表达
* 35% = thirty-five percent
* 100% = one hundred percent
* 0.5% = zero point five percent
分数/百分数作主语的主谓一致
谓语与of后的名词一致：
* Two-thirds of the work is done.（work不可数→单数）
* Two-thirds of the students are girls.（students可数→复数）
* 70% of the earth is covered with water.（earth→单数）
* 70% of the teachers are women.（teachers→复数）
小数与倍数的表达
难度 2/3
小数表达法
* 小数点读成 point
* 0.5 = zero point five / (nought) point five
* 1.25 = one point two five（不用twenty-five）
* 3.1415 = three point one four one five
倍数表达法（重要）
* 倍数 + as + 原级 + as：
This room is three times as large as that one.
* 倍数 + 比较级 + than：
This room is three times larger than that one.
* 倍数 + the + 名词 + of：
This room is three times the size of that one.
* 常用倍数词：twice（两倍）, three times（三倍）
* once（一倍）/ twice（两倍）/ three times（三倍）
常见数学表达
* 加：plus / and —— 3 + 2 = 5: Three plus two is five.
* 减：minus —— 7 - 3 = 4: Seven minus three is four.
* 乘：times / multiplied by —— 2 x 3 = 6: Two times three is six.
* 除：divided by —— 10 / 2 = 5: Ten divided by two is five.
日期、时间与编号表达
日期与时间的表达
重点 难度 1/3
年份读法
* 2000前按两位一组读：
1984 = nineteen eighty-four
1900 = nineteen hundred
1908 = nineteen o eight
* 2000及以后：
2000 = two thousand
2008 = two thousand and eight / twenty o eight
2024 = twenty twenty-four
日期表达
* 美式：July 4th, 1776 = July fourth, seventeen seventy-six
* 英式：4th July, 1776 = the fourth of July
* 写作中常见形式：July 4, 1776 / 4 July 1776
时间表达
* 整点：7:00 = seven (o'clock)
* 半点：7:30 = seven thirty / half past seven
* 刻钟：7:15 = seven fifteen / a quarter past seven
7:45 = seven forty-five / a quarter to eight
* 半小时内past/超出半小时to：7:10 = ten past seven / 7:50 = ten to eight
介词搭配
* at + 时间点：at 5 o'clock
* on + 具体天：on July 4th
* in + 月份/年/世纪：in 2024
编号表达
* 名词 + 基数词：Room 301, Bus 5, Page 10, Chapter 3
* the + 序数词 + 名词：the third chapter
* 电话号码按个位数字读：8532-6179 = eight five three two six one seven nine
* 连续相同数字用double/triple：556 = double five six, 777 = triple seven
年龄与年代的表达
难度 1/3
年龄表达
* She is twelve (years old).（最常用）
* She is a twelve-year-old girl.（合成形容词，year不用复数）
* at the age of twelve = at twelve
* in her twenties（她二十几岁时）
* in the 2020s / 2020's（二十一世纪二十年代）
in one's + 整十复数（在某人几十岁时）
* in one's twenties（二十几岁）
* in one's thirties（三十几岁）
* in one's forties（四十几岁）
* in one's early twenties（二十二三岁）
* in one's late thirties（三十八九岁）
in the + 年份s（在...年代）
* in the 1990s（二十世纪九十年代）
* in the 1980s（八十年代）
* 注意：in 1990（在1990年）vs in the 1990s（在二十世纪九十年代）
every + 数词
* every three days = every third day（每三天）
* every other day（每隔一天）
* every few days（每隔几天）