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1、把握分数、时间、日期的表达法;【复习要点(一)基数词学习必备欢迎下载只有表示 “百”、“千”的单位词,没有单独表示“万”、“亿”的单位词,而是用 thousand(千)和million (百万)来表达,其换算关系为:1 万=10thousand;1 亿=100 million; 10亿 =a thousand million=a billion;6多位数的读法:基数词用来表示数目,或者说表示数量的词叫基数词;最基本的基数词如下表所示;1 one11 eleven100 a hundred2 two12 twelve20 twenty1000 a thousand3 three13 thirte
2、en30 thirty1,000, 000 a million4 four14 fourteen40 forty10, 000, 000 ten million5 five15 fifteen50 fifty100, 000, 000 a hundred million6 six16 sixteen60 sixty1,000, 000, 000 a billion7 seven17 seventeen70 seventy8 eight18 eighteen80 eighty9 nine10 ten19 nineteen90 ninety说明:113 19 是由个位数加后缀-teen 构成;留意
3、其中13、15 的拼写是thirteen和 fifteen ;22090 由个位数加后缀-ty 构成,留意其中 20 50 的拼写分别是twenty, thirty, forty和 fifty;80 的拼写是eighty ;3其它非整十的两位数21 99 是由整十位数加连字符“-”,再加个位数构成;如:81 eighty-one ;4 101 999 的基数词先写百位数,后加and 再写十位数和个位数;如: 691 six hundred and ninety-one ;5 1000 以上的基数词先写千位数,后写百位数,再加and,最终写十位数和个位数;如:5893 five thousand
4、 eight hundred and ninety-three ; 在基数词中1) 1000 以上的多位数,要使用计数间隔或逗号“, ”;即从个位起,每隔三位加一个间隔或逗号;第一个间隔或逗号前是thousand(千),第 二个间隔或逗号前是million (百万),第三个间隔或逗号前是a thousandmillion或 a billion 十亿 ;2)每隔三位分段以后就都成了101 999;读的时候十位数(或个位数)的前面一般要加and;如:888, 000, 000 读作: eight hundred and eighty-eight million;基数词的用法:1. 基数词在句中的作
5、用基数词的作用相当于名词和形容词,在句中可作定语、 主语、宾语(介宾)、表语、同位语等;例如: three and five is eight. 3+5=8( 作表语) how many oranges do you want. 你要多少桔子?i want eight.我要八个; ( 作宾语)there are eight boats in the lake.湖里有八条小船; ( 作定语)2hundred, thousand, million,dozen, score 这些词前面如有表示详细数 字的词,它们不能加“s”反,之就须加“s,”并要与 of 短语连用;例如:three hundred
6、 people, five thousand years;thousands of people, hundreds of students, thousands of trees(二)序数词表示次序的词,叫序数词;序数词用来表示数词次序;除特别情形外,序数词一般都由相应的基数词加后缀-th 构成;请见下表:第一到第十第十一到第十九其次十以上firsteleventhtwentiethsecondtwelfththirtieththirdthirteenthfortiethfourthfourteenthfiftiethfifthfifteenthsixtiethsixthsixteenths
7、eventiethseventhseventeentheightietheightheighteenthninetiethninthnineteenthhundredth tenththousandth说明:学习必备欢迎下载第 305 房间: room 305第 12 路公共汽车:bus no.12序数词的用法序数词表次序,主要作定语,其前面须加上定冠词the,此外,也作 主语、宾语、表语和定语 等,这时,被它所修饰的名词往往被省略;如:the first person to arrive is kate.例如:the first is bigger than the second.( 作主语
8、)第一个比其次个大;give me the first.( 作宾语)把第一个给我;she s oftetnhe first to go to school.( 作表语)她常常第一个去上学;we re goingto learn the eighth lesson.( 作定语)我们将要学习第八课;(三)分数表达法1英语中表示第一、其次、第三的序数词属特别形式,要留意它们的拼写;2表示 “几十 ”的序数词通常是将基数词词尾y 变成 i 再加上后缀 -eth;3其余的二位数序数词是以相应的整十基数词加个位序数词;如: fifty-first (第五十一) ;4少数序数词拼法不规章,如:fifth (
9、第五),eighth(第八),ninth(第九), twelfth (第十二)等;留意:1序数词可缩写为阿拉伯数字加序数词最终两个字母;例如:第一: the first=1st其次: the second=2nd第三: the third=3rd第五: the fifth=5th第九十七: the ninety-seventh=97th第一百零一:the one hundred andfirst=101st 2编了号的事物要用基数词表示次序,但是基数词要后置;例如:第一课: lesson one第三十二页: page 32先写基数词表示分子,后写序数词表示分母,假如分子大于1 时,分母用复数;
10、如: one-fourth, two-fifths, three-tenths(四) 小数表达法小数点前的整数按基数词的规章表示,小数点写作point,小数后的数 字应按其数字直接表示出来;如:18.38 可写成: eighteen point three eight ;留意:小数在句中常作定语,特别在比较方式状语从句中被使用;如:this stone is 3.5 times heavier than that one.(五)百分数表达法(依据同学情形挑选使用)在数词后加percent;例如: 15%读作: fifteen percent ;60%读作: sixty percent(六)表示
11、倍数(依据同学情形挑选使用)1) 几倍大小(长短,数量)=几倍(或分数)+the sizelength,amount ;例如: the earth is forty-nine times the size of the moon.地球是月球的49 倍;2) 比几倍 =倍数(或分数)+形容词(副词)比较级+than+ 被比部分;学习必备欢迎下载例如: his house is three times bigger than mine.他的房子比我的房子大三倍;3) 是倍=倍数(或分数)+as +形容词 +as +被比部分;例如:this factory is four times as big
12、as that one.这个工厂是那个工厂的四倍;(七)表示约数(依据同学情形挑选使用)1) “多于 ”用 more than 或 over;例如: the street is overmore than 500 metres long.这条街有 500 多米长;2) “小于 ”用 less than;例如: three are less than 30 people in the classroom.教室里不到三十人;3) “或以上 ”用 or more;例如: the building can hold 5000 people or more.那座建筑物可容纳5000 人或 5000 人以
13、上; 4) “或以下 ”用 or less;( apr. ) , 五月may,六月june, 七月july,八月augustaug. ,九月septembersep., 十月octoberoct.,十一月novembernov.,十二月decemberdec. ;3日期的表达要用序数词,读时前面要加定冠词the,介词要使用on; 例如:在6 月 1 日: on june 1st 读作: on june the first.年、月、日同时表达时,一般应先写月、日、后写年;如:在2001年5月 4日: on may 4 th, 2001 ;4岁月用基数词的复数表示;例如: 20 世纪 90 岁月:
14、 nineteen nineties; 21 世纪 20 岁月: twenty twenties5时间表达法:时间可用顺读法或倒读法两种方式表达;例如:5:00 five o clock6:18 six eighteen 或 eighteen past six 12: 15 twelve fifteen或 fifteen a quarter past twelve4: 30 four thirty 或 half past four6: 45 six forty-fivea quarter to seven留意:例如: we can finish the work in two weeks or
15、 less.我们可以在两周内或不到两周完成这件工作;5) “大约 ”用 about, around, nearly 等;1)表示整点时间, 直接用基数词表达,后边可接o clock也表达 “几点几分 ”时,绝不能用ocloc;k2)表达 “ 15分”或“ 45分”时,常用 quarter(刻);可不加 ;例如: the box weighs about 50 pounds.这箱子重约50 镑;6) “左右 ”用 or so.如: in the past ten years or so, they have changed a lot.在过去的十年里,他们转变了很多;(八)年、月、日和时间的表达
16、法 1年份用基数词表达,分两位一读,年份前用介词in;例如: 1999nineteenninety-nine2000twothousand2001twothousand and one 2月份的第一个字母要大写,有些月份名称有缩写形式;例如:一月januaryjan., 二月februaryfeb.,三月marchmar.,四月3)在倒读法中,假如钟点不过半,须用 “分钟数 +past+钟点数 ”的形式;假如钟点过半,就用 “差多少分钟数 +to+ 全钟点(下个钟点数) ”的形式;两组与数词有关的介词短语: in+ 定冠词 the+数词的复数形式,表示岁月;如:in the 1870s 或 1
17、870 s in+ 物主代词 +数词的复数形式,表示某人的年龄;如:inone s thirties ;有时在物主代词后面可加上形容词early 或 late 使其含义更准确 些;如: the young man is at most in his early thirties.学习必备欢迎下载留意:带有数词的名词作定语的表达:a seven-year-old boy, a hundred-metre race数词专项练习 一 1. lincoln was born on .a. february 12, 1809b. 1809, february 12c. 1809, 12 february
18、d. february 1809,12 2. a boy can sing the english song very well.a. ten-year-oldb. ten years oldc. ten-year-oldd. fifth years old 3. an hour later,minister was sent to see the box by those two men.a. twob. the secondc. the twod. second 4. abraham lincoln was president of the united statesa. 16b. the
19、 16c. 16thd. the 16 th 5. do you think there is any room for us .a. twob. the twoc. secondd. the second 6. -how many students are there in your class.- .a. twenty nineb. thirty and twoc. forty-fived. fifties 7. which number is wrong. .a. ninetyb. ninteenc. ninthd. nineteenth 8. the people s liberati
20、on army was founded .a. on august 1, 1927b. in 1927, 1 augustc. on august 1 st, 1927d. in august 1, 1927 9. the number 4,123 is read .a. four thousand one hundred and twenty-threeb. four thousand and one hundred twenty-threec. four thousand and a hundred and twenty-threed. four thousands a hundred a
21、nd twenty-three学习必备欢迎下载c. 28 of februaryd. the 28th of february86. - how soon will you finish your work.- in about .a. one and a half monthb. one month and a half 10. the old professor still works hard though he is .a. in his sixtyb. in his sixtiesc. in sixtiesd. in the sixty数词专项练习 二76. tuesday is t
22、he day of a week in english.a. firstb. fifthc. thirdd. fourth77. there are seasons in a year in our country.a. twob. fourc. secondd. fourth78. the game of olympics will be held in beijing in 2021.a. 29 b. the 29th c. the 29 d. 29th79. most of the stars are much more bigger than the sun. but they are
23、 light years away from us.a. thousandb. thousandsc. thousand ofd. thousands of 80. of the surface 表面 of the earth is covered with water.a. first thirdb. two thirdsc. one threed. two three81. there are people in my family. we live on the floor in a tall building.a. five, sixb. fifth, sixthc. fifth, s
24、ixd. five, sixth82. boys and girls, we are going to learn today.a. four lessonb. the fourth lessonc. the lesson fourd. the four lesson 83. my lovely daughter is .a. eight years old b. eight-year-old c. eight year old d. eight-years-old 84. the flood happened .a. in the summer of 1998 b. in the summe
25、r of 1998sc. in 1998 of the summer d. in 1998s of the summer 85. february 28 should be read as .a. february of the 28thb . february of 28c. one and half a monthd. a month and half87. we will have a holiday. what about going to suzhou.a. five daysb. five dayc. five-dayd. five-days 88. we are sure the
26、 century will bring us more hopes.a. twentieth-firstb. twentieth-onec. twenty-oned. twenty-first89. - what is 1/2 and 1/3.- it s .a. 2/5b. 1/5c. 5/6d. 4/690. at the age of , he had his own lab.a. thirtyb. thirtieth c. the thirtiethd. the thirty 91. five times five is .a. fiveb. zeroc. tend. twenty-f
27、ive92. are in the army. a. two their sonsb. their two sonsc. their sons two d. two sons their 93. my sister is a student of .a. the first classb. class onec. one classd. class first 94. the boy can count from one to .a. hundred b. a hundredc. one hundredsd. hundreds 95. their house is about as big as ours.a. times threeb. three timec. time three d. three times 96. - would you like some fruit, madam.- oh, yes. , please.a. 5 kilo bananasb. 5 kilos of bananasc. 5 kilo of bananasd. 5 kilos of banana 97. this building is for a .a.
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