英语数词的用法及专项练习

英语数词的用法及专项练习数词是表示数量多少或顺序先后的词.分为基数词和序数词.（一）基数词1. 表示数量多少的词是基数词，如：one, two, three等.2. 数词的构成1）从1－12分别由从one到twelve，12个各不相同的词表示.one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve2）从13－19均以后缀-teen结尾.thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen3）从20－90的整十数词均以后缀-ty结尾.表示“几十几”时，个位和十位之间需加连字符. twenty, thirty, forty, fifty, sixty, seventy, eighty, ninety21 twenty-one 32 thirty-two 43 forty-three4）整百数由1—9加hundred构成.100 one (a) hundred 500 five hundred5) 整百数和整十数之间由and连接，十位与个位之间要加连字符“-”.如果十位数为零，那就在百位和个位之间用and连接.101 one hundred and two 245 two hundred and forty- five6）千 thousand 百万 million 十亿 billionExercise:写出下列数字12 14 2040 90 19400 60035 78305 6782、序数词序数词表示排列顺序，如first, second, third等.构成规则：1) 序数词第一、第二和第三为first, second和third,其他序数词的构成是在基数词后加th.例如：six → sixth seven → seventh ten → tenth four → fourth2) fifth(第五)、 eigth (第八)、 ninth (第九)和twelfth (第十二)在拼法上有变化.first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth, twelfth, thirteenth, fourteenth, fifteenth, sixteenth, seventeenth, eighteenth, nineteenth3) 二十、三十等基数词变为序数词时,要把y变成ie再加-th.例如：twenty→twentieth forty→fortiethtwentieth, thirtieth, fortieth, fiftieth, sixtieth, seventieth, eightieth, ninetieth4) 基数词几十几变成序数词时,表示几十的数词不变,只把表示几的基数词变成序数词.例如：twenty-one → twenty-first forty-five → forty-fifth5）.序数词的缩略形式是由阿拉伯数字加序数词的最后两个字母构成.例如：1st, 2nd, 3rd, 4th, 21st, 32nd, 40th6) 序数词前必须加定冠词theThe first time I came to China, I liked it very much.我第一次来中国，我就非常喜欢这个国家.The first is always better than the second.第一总是比第二好.She will choose the third. 她将选择第三.Exercise:把下列基数词改成序数词.one two threefive nine eightfourteen twentythirty-five3. 数词的应用1）时刻的表示法A、表示几点钟用基数词加可以省略的o'clock5:00 读作 five o'clock 或 fiveB、半点的表示法表示半点钟时，用“钟点数+ thirty”或“half+ past +钟点数”表示2: 30 two thirty / half past two8:30 eighty thirty / half past eightyC、“几点几分”的表示法（1）用“钟点数+分钟数”表示7：10 seven ten 9：40 nine forty（2）分钟数在30分钟以内的，用“分钟数+ past +钟点数”表示，意为“几点过几分“7：10 ten past seven 10:15 fifteen past ten / a quarter past ten（3）分钟数超过30分钟的，用“（60-分钟数）+ to +下一个钟点数”表示，意为“差几分到几点”10:40 twenty to eleven 2 : 45 fifteen to three / a quarter to threeExercise: 用英语表示下列时间10: 05 8: 3012:10 1:155:47 9:233:51 11:496:00 7:222) 编号的表示法编号既可以用序数词,也可用基数词.the tenth lesson Lesson Ten 第十课the fiftieth page page 50第五十页有的编号习惯上常用基数词.例如：Room 321(读作three two one) 321号房间Tel.No.4013586(读作Telephone number four 0 one three five eight six)电话号码40135863）年、月、日的表示法英语中表示日期的顺序通常为月日年或日月年.1、月、日的表示法“月”用英语中表示月份的名词，“日”用基数词或序数词表示都可以. 7月8日 July 8(July eight) / July 8th ( July the eighth)10月1日 October 1 ( October one) / October 1st ( October the first)2、年的表示法1983→nineteen eighty-three1700→seventeen hundred1870→eighteen seventy2008→two thousand and eight1601→sixteen and one或sixteen hundred and one965→nine sixty-five3、年、月、日的表示法1986年9月1日 September 1st, 1986 / 1st September, 19862011年8月8日 August 8, 2011 / 8th August, 2011Exercise:用英语表示下列日期11月1号 2月10号5月22号 9月17号10月3号 12月19号四、课堂练习1）根据括号中的数字填写合适的序数词或基数词（写单词）.1、Bill is （14）years old , he is in Class （2）Grade （6）.2、My birthday is on the （3）of March .3、September is the （9）month in a year .4、Which boy is thinner , the （1）one or the （2）one ?5、There are （55）students in our class .2）单项选择( )1．There are ___________ days in a year．A．three hundred and sixty five B．three hundred and sixty-fiveC．three hundreds and sixty five D．three hundreds and sixty—five( )2．Danny lives in __________．A．room 404 B．Room 404 C．404 room D．404 Room( )3．Jim is in __________．A．class one，grade six B．grade one，class sixC．Class One，Grade Six D．Grade One, Class Six( )4．The bike cost me _________ yuan．A．five hundred forty B．five hundreds fourtyC．five hundred and forty D．five hundred fourty( )5．My telephone number is ____________．A．eighty eight two forty four zero nine B．eight eight two double four O nine C．eighty eight two forty-four zero nine D．eight eight two four four zero nine ( )6．Is there any food for us _________?A．ten B．tenth C．the tenth D．the ten( )7．Mary is _________ girl．A. an 8 year old B．8一years—oldC．the 8 years old D．an 8一year—old( )8．—What day is today? — ___________A．June B．Tuesday C．It is hot D．It’s fine( )9．—What’s the date today?— ___________A．It’s Saturday B．It’s July C．It’s fine D．It’s JuIy 15( )10．—What time do you get up every day?A．It’s seven o’clock B．Seven o’clock timeC．At seven D．On seven五课后作业1．There are ___________ days in a year．A．three hundred and sixty five B．three hundred and sixty-fiveC．three hundreds and sixty five D．three hundreds and sixty—five( )2．Danny lives in __________．A．room 404 B．Room 404 C．404 room D．404 Room( )3．Jim is in __________．A．class one，grade six B．grade one，class sixC．Class One，Grade Six D．Grade One Class Six( )4．The bike cost me _________ yuan．A．five hundred forty B．five hundreds fourtyC．five hundred and forty D．five hundred fourty( )5．My telephone number is ____________．A．eighty eight two forty four zero nine B．eight eight two double four O nine C．eighty eight two forty-four zero nine D．eight eight two four four zero nine ( )6．Is there any food for us _________?A．ten B．tenth C．the tenth D．the ten( )7．Mary is _________ girl．A. an 8 year old B．8一years—oldC．the 8 years old D．an 8一year—old( )8．—What day is today? — ___________A．June B．Tuesday C．It is hot D．It’s fine( )9．—What’s the date today? — ___________A．It’s Saturday B．It’s July C．It’s fine D．It’s JuIy 15( )10．—What time do you get up every day?A．It’s seven o’clock B．Seven o’clock tim e C．At seven D．On seven。