八上U2 数词的用法
考点一 基数词
数字 基数词形式 例词
0-12 各自独立 zero 0; one 1; nine 9; twelve 12
13-19 3-9+重读teen结尾 特殊:thirteen 13; fifteen 15; eighteen 18
一般 加teen fourteen 14; sixteen 16
20-90 整十位数以ty结尾 twenty 20; thirty 30; forty 40; fifty 50; sixty 60;seventy 70; eighty 80; ninety 90
两位数几十几 整十位数-个位数 twenty-one 21; thirty-five 35; ninety-eight 98
三位数几百几 hundred and+两位数 seven hundred and eighty-five 785; two hundred and ten 210
多位数 从右向左数起每隔三位数加一个逗号依次为thousand(千)million(百万)billion(十亿), 逗号中间三位数 76, 832, 154, 968 seventy-six billion eight hundred and thirty-two million one hundred and fifty-four thousand nine hundred and sixty-eight
考点二 序数词
数字 序数词变化规则 例词
1、2、3 不规则变化 first第一; second第二;third第三
4-19 基数词词尾加th 特殊fifth 第五 eighth 第八ninth 第九twelfth第十二 fourth第四;nineteen十九
20、30 ……90 ty变为tie再加th twenty→twentieth第二十ninety→ninetieth第九十
两位数或多位数 整数除外只变个位数 (hundred, thousand等只在词尾加th) twenty-third 第二十三one hundred and fifty-ninth 第一百五十九hundredth 第一百
【温馨提示】
(1)序数词要加定冠词the,但若序数词前有形容词性物主代词或名词所有格时省略the。
Tom made the mistake for the third time. = It was Tom’s third time to make the mistake. 这是汤姆第三次出错。
(2)序数词前加a/an表示“又一;再一”。
Even though the Greens have 3 children, they still want a fourth one.
尽管格林夫妇已有3个孩子,可他们还想再要一个。
(3) 序数词可以用阿拉伯数字和序数词拼写的最后两个字母简写。例如1st第一2nd第二3rd第三4th第四。
考点三 数词应用
名称 表 达 法 例 词
年份 特别提示:年份的读法前两位数, 再读后两位数, 读日时要加the 可先读1997年3月21日March the twenty-first, nineteen inety-seven
日期 月日年 日用序数 年用基数日月年 the+序数词+of+月+年 2007年3月21日—the twenty-first of March, two thousand and seven
年代 in+the+数词的复数形式 在18世纪20年代—in the 1720’s/1720s读作:in the seventeen twenties
时刻 时在前,分在后,按基数词读 10: 15 ten fifteen
分在前,时在后 “几点过几分”用past分钟数须小于半小时,包括半小时在内 7: 05 five past seven 7:15 fifteen past seven 7: 30 half past seven
“几点差几分”用介词to,但分钟数须在半小时以内,不包括半小时在内 7: 57 three to eight 11: 46 fourteen to twelve 2: 40 twenty to three
几刻钟 一刻钟:a quarter 三刻钟:three quarters 九点一刻:a quarter past nine
编号 给东西编号时:序号在前用序数词 lesson twelve=the twelfth lesson
序号在后用基数词
分数 分子用基数词:分母用序数词 记忆口诀:分子基,分母序分子大于1,分母加s特别提示:通常二分之一用 a/one half表示。四分之一用 a/one quarter表示,三分之一one third two thirds four fifths seven tenths
带分数 当分数前面带有整数时,要用连词and连接 two and two thirds
倍数 英语用twice表示两倍,两倍以上用基数词加times表示 twice两倍three times三倍forty times四十倍
中考真题:
Ⅰ. 用所给数词的适当形式填空
1. I have tried three times, and the teacher asks me to have a _______ (four) try.
2. (Even a child knows September is the _______ (nine) month of a year.
3. I’ve bought a present for my father’s _______ (forty)birthday.
4. Mr. Smith lives on the _______ (six) floor.
5. Climb up to the _______ (eleven) floor, and you can enjoy a better view.
Ⅱ. 单项选择
1. There are _______ days in a week and Tuesday is _______ day of the week.
A. seven; third B. seven; the third C. seventh; three D. the seventh; three
2.—There are 60 students in my class and 44 of them use weibo very often.
That means about _______ of your classmates are weibo users, right
A. half B. one third C. two thirds D. three quarters
3. Eight _______ students in our school are from countryside.
A. hundreds B. hundred C. hundreds of D. hundred of
4. He wrote his _______ novel when he was _______.
A. five; fifties B. fifth; fifty C. fifth; fiftieth
5. July 1st of this year is _______ birthday of CPC (中国共产党).
A. ninety B. the ninety C. the ninetieth
6. Kangkang is a school boy. He got a good gift on his _______ birthday.
A. fourteenth B. fortieth C. the fortieth
7. I don’t believe that this _______ boy can paint such a nice picture.
A. five years old B. five-years-old C. five-year-old
8. About _______ of the students in Grade Nine this year were born in the _______.
A. three five; 1996 B. three fifths; 1990s C. third fifth; 1997 D. third fifths; 1990s
9.—If a=4, b=5, what’s the answer to the question “a+2ab+1= ” — _______.
A. Forty-fifth B. Forty-five C. Twenty-three D. One hundred and twenty-one
10. —Do you have enough students to clean the laboratory
—No, I think we need _______ students.
A. another B. two others C. more two D. two more