英语语法 English Grammar Unit 2 Numbers. Study objectives Warm-up activity Unit 3 Numbers.

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英语语法 English Grammar Unit 2 Numbers

Study objectives Warm-up activity Unit 3 Numbers

Study objectives describe the definition of numbers classify the classes of numbers grasp the usages of numbers grasp the usages of Cardinal Numbers; grasp the usages of Ordinal Numbers; grasp the usages of Fractional Numbers;

Let’s do some warm-up exercises! Warm-up Activity

Translation a drop in the ocean 沧海一粟 within a stone’s throw 一箭之遥 kill two birds with one stone 一箭双雕 A fall into the pit, a gain in your wit. 吃一堑,长一智。

Translation at sixes and sevens 乱七八糟 on second thoughts 再三考虑 by ones and twos 三三两两地,零零落落地

He had one over the eight after be drank only half bottle of the wine. 他才喝了半瓶酒就醉得七歪八倒了。 Two heads are better than one. 三个臭皮匠胜过诸葛亮。 Translation

One man’s meat is another man’s poison. 人各有所好。 I’ll love you three score and ten. 我会爱你一辈子。 His mark in math is second to none in the class. 他的数学分数在班上名列前茅。

Translation I always believe my sixth sense. 我总相信我的直觉。 He talks about you nine times out of ten when we have a chat. 每次我们闲聊他几乎都谈及你。

Task 1.1 The classification of numbers

Contents 1. The classification of numbers 2. Cardinal numbers 3. Ordinal numbers 4. Percentages 5. Fractions 6. Decimals 7. Multiples 8. Additional information 9. Exercises of numbers

Task 1.2 Cardinal Numbers

基数词的构成 ( 一) I II III IV 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 30.thirty 40.forty 50.fifty 60.sixty 70.seventy 80.eighty 90.ninety 一百 one hundred 一千 one thousand 一万 ten thousand 十万 one hundred thousand 一百万 one million 一千万 ten million 一亿 one hundred million 十亿 billion

基数词的构成(二) 之间各数词要在十位和个位之间加连字符号 “ - ” 。 22 twenty-two 99 ninety-nine 2. 三位数数词要在百位和十位(若无十位则和个位)之 间加 and 。 157 one hundred and fifty-seven 208 two hundred and four 3.1,000 以上的数字,从后面向前数,每三位数加 “ , ” ; 第 1 个 “ , ” 为 thousand ,第 2 个 “ , ” 为 million 。 2,002 two thousand (and) two 38,654 thirty-eight thousand six hundred (and) fifty-four

基数词的用法 1. 作定语 The nine girls are from Beijing. 这九个女孩是北京人。 2. 作主语 Eight is a good number. 8 是个好数字。

3. 作宾语 How many do you want? Five, please. 你要多少? 五个。 4. 作表语 They are altogether fourteen. 他们一共十四个人。 5. 作同位语 There is a room for you two. 有你们两人的房间。

Task 1.3 Ordinal Numbers

序数词的构成 1. 以与之相应的基数词加词尾 -th 构成 six — sixth four—fourth ten — tenth 2. 特殊形式 one—first two—second three—third 3. 缩写形式 阿拉伯数字 + 序数词的最后两个字母。 first—1st second—2nd third—3rd

序数词的用法 1. 作主语 The first is his. 第一个是他的。 2. 作宾语 Please pass me the third. 请递给我第三个。 3. 作定语 The tenth boy is from Singapore. 第十个男孩是新加坡人。 注意:序数词作定语时,前面一般要加定冠词 (或物主代词)

Task 1.4 Percentages

百分数 用法 : 例句作状语 The price of the computer was reduced by 24 per cent. 计算机价格降低了 24% 。 The output of cars in China this year is 48 per cent more than in 今年中国小汽车产量比 2001 年上升了 48% 。

Task 1.5 Fractions

分数词的形式 类别 : 1. 一般表示法 one fourth two third 2. 其他表示法 two and three fifths a (one) half a (one) quarter three quarters

分数词的作用 1. 作主语 A quarter of the students are from England. 1/4 的学生是英国人。 2. 作宾语 We will use one fifth of the money for construction. 我们将用 1/5 的钱来进行建设。 3. 作表语 My salary is only one third of that of his boss. 我的工资只是他老板的 1/3 。

4. 作定语 It’s one-twentieth the thickness of a human hair. 它相当于人头发丝的 1/20 (那样粗细)。 5. 作状语 This room is one tenth larger than that one. 这个房间比那个房间大 1/10 。 分数词的作用

Task 1.6 Decimals

小数的读法 例子: 6.3 six point three 0.4 zero( 或 nought) point four twelve point three eight six eight hundred and six point o seven

小数的用法 作定语: The number of college students is now 2.8 times that of 1998 in our college. 我们大学现在的学生人数是 1998 年的 2.8 倍。 Its capacity was 4.3 times as great as that in 它的生产能力为 1981 年生产能力的 4.3 倍。

Task 1.7 Multiples

倍 数 通常用 time 表示倍数 The earth is 49 times the size of the moon. 地球的大小是月球的 49 倍。 The output of computers was more than 3 times greater. 计算机产量增长了 3 倍多。 It is 8 times as big as Japan. 它有日本 8 倍大。

Task 1.8 Additional Information

年份、月份、日期、时刻 1. 年份(年份是四位数字时,一般分为 两位来读),表示年份用介词 in 1985 年 nineteen eighty-five 1990 年 nineteen ninety 2000 年 two thousand 2006 年 two thousand and / o six

2. 月份(月份的第一个字母要求大写),表示 月份用介词 in 月 份缩写月 份缩写 1月1月 JanuaryJan. 7月7月 JulyJul. 2月2月 FebruaryFeb. 8月8月 AugustAug. 3月3月 MarchMar. 9月9月 SeptemberSep. 4月4月 AprilApr. 10 月 OctoberOct. 5月5月 May 11 月 NovemberNov. 6月6月 JuneJun. 12 月 DecemberDec.

4. 时刻(通常使用基数词来读),表示时刻用 介词 at 8 点 eight o’clock / eight 9 点 15 分 nine fifteen/ a quarter past nine 14 点 15 分 fourteen fifteen 上午 9 点 nine a.m. 下午 5 点 25 分 five twenty-five p.m.

数学算式和编号表示法 类 别例 子读 法 数学算式数学算式 均用基数词 加 plus 或 and 减 minus 乘 times 除 divided by 2+3=5 8-2=6 8×5=40 15÷3=5 15×10= ? Two plus (and) three are (is) five. Eight minus two is six. Eight times five is forty. Fifteen divided by three is five. How much is fifteen times ten?

数学算式和编号表示法 类 别例 子例 子读 法 编号表示编号表示 1. 编号一般用 基数词 2. 如数字较小, 可用以下两 种形式: 1 )名词 + 基数词 2 ) the+ 序数词 + 名词 203 房间 7 号公共汽 车 中山路 118 号 第八课 第二次世 界大战 Room Two o three Bus Number Seven 118 Zhongshan Road Lesson eight 或 the Eighth Lesson World War Two 或 The Second World War

基数词的复数形式 作 用例 句 1 Hundred, thousand, million 后有 of 时,要用复 数形式,同时,前 面不能加具体数目 Hundreds of cars came to the town. They arrived in twos and threes. 2 表示 “ 十 ” 的数词的 复数形式可用来表 示人们岁数或年代 He is in his early forties. This story happened in the 1980s.

其他表示数字的词 类 别例 子 1 dozen 意为 “ 一打, 12 个 ” , 其结构: 1 )基数词 +dozen (of) + 复 数名词 2 ) dozens of + 复数名词 two dozen eggs dozens of students 2 score 意为 “20” ,其结构: 1 )基数词 +score (of) + 复 数名词 2) score s of + 复数名词 two scores of chairs scores of years

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