资源简介 (共29张PPT)第六章 数词【复习要求】1.识记1~100的基数词和1~100的序数词的表达方式。2.掌握数词的用法以及年、月、日和时刻的表示法。3.理解thousands of,millions of的用法。【知识要点】一、基数词1.基数词的写法和读法:(1)1~20的基数词是:one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve,thirteen,fourteen,fifteen,sixteen,seventeen,eighteen,nineteen,twenty。注意:13~19的数字,是在单词末尾加后缀 teen构成。注意:thirteen,fifteen,eighteen的拼法。(2)10~100 的十位数为:ten,twenty,thirty,forty,fifty,sixty,seventy,eighty,ninety,hundred。注意:twenty,thirty,forty,fifty,eighty的拼法。(3)数字21~29是由十位数20加个位数1~9构成,中间必须有连字符。如:twenty one(21),twenty two(22)。其他的十位数字依此类推,如:thirty three(33),forty five(45),sixty seven(67),seventy two(72),eighty nine(89),ninety six(96)2.hundred,thousand,million等用来表示确切的数目时,这些词本身不用复数。如:three hundred,five thousand,nine million。而hundreds of,thousands of,millions of 则表示多而不具体,是一个不确切的数目。如:Hundreds of people went to the celebration.几百人参加了庆祝会。3.表示“几十多岁”用in+one’s+十位数的复数形式。如:in his thirties在他的三十多岁4.表示“年代”用in+the+数词复数。如:in the 1850s/in the 1850’s在19世纪50年代二、序数词1.序数词第一至第二十的表达:first(1st),second(2nd),third(3rd),fourth(4th),fifth(5th),sixth(6th),seventh(7th),eighth(8th),ninth(9th),tenth(10th),eleventh(11th),twelfth(12th),thirteenth(13th),fourteenth(14th),fifteenth(15th),sixteenth(16th),seventeenth(17th),eighteenth(18th),nineteenth(19th),twentieth(20th)注意:英语序数词第1~19中,除了first,second,third 有特殊形式外,其余的一般由基数词加后缀 th构成。2.第20~100的十位数为:twentieth(20th),thirtieth(30th),fortieth(40th),fiftieth(50th),sixtieth(60th),seventieth(70th),eightieth(80th),ninetieth(90th),hundredth(100th)注意:十位数的序数词的构成方法是:先将十位数的基数词的词尾ty中的y变成i,然后加后缀 eth。3.如果是“几十几”的数字,十位数字用基数词,个位数字用序数词,中间用连字符。序数词的数字表达形式是由十位数字加上个位数字,再加上个位数字上的最后两个字母构成。如:twenty first(21st),forty fifth(45th),thirty second(32nd),eighty seventh(87th)4.如果序数词用作日期或名次,读时前面要加上定冠词“the”。如:I’m the first.我是第一名。My birthday is on May 1st.(读作May the first.)我的生日是五月一日。三、数词的用法1.分数的表示法基数词代表分子,序数词代表分母。分子是1时,分子的基数词和分母的序数词都用单数;分子大于1时,分子的基数词用单数,分母的序数词用复数,如:1/3:one third;4/5:four fifths2.小数的表示法基数词+小数点+基数词(小数点读成point,小数点以后的数按一个个基数词读)。如:1.8:one point eight;2.87:two point eight seven3.百分数的表示法基数词+per cent(percent)。如:15%:fifteen percent4.年、月、日的表示法2023年10月1日写作Oct.1(st),2023;读作October the first,two thousand and twenty three。5.年龄的表示法这个小男孩三岁。This boy is three years old./This is a three year old boy.6.时刻的表示法6:20读作six twenty/twenty past six;7:50读作 seven fifty/ten to eight.7.编号的表示法“第二课”读作Lesson Two/ the second lesson“五号房间”读作 Room Five/the fifth room8.倍数的表示法(参照形容词比较级的用法P41)【例题解析】( )1.In this school,classes begin at in the morning. A.half past seven B.thirty sevenC.half to seven D.seven and a half【答案】 A【解析】 “七点半”常用下面两种方式来表达:half past seven 和seven thirty。( )2.There are about five workers in our factory. A.hundreds B.hundredC.hundreds of D.hundred of【答案】 B【解析】 500应是five hundred,注意hundred后不加“s”。hundreds of是“成百,几百”的意思,是一个不确切的数字。( )3.May is month of the year. A.five B.the five C.fifth D.the fifth【答案】 D【解析】 五月是一年的第五个月,这里应用序数词。基数词是five,序数词是fifth,序数词前要加定冠词“the”。( )4.It was in when he was already in that he went to Yan’an. A.the 1940s;the 40s B.the 1940s;his fortiesC.1940’s;his forties D.the 1940’s;his 40s【答案】 B【解析】 “在20世纪40年代”,前面必须有定冠词“the”,此外,年代后要加“s”。“某人40多岁”要用“sb.is in one’s forties”.【同步精练】( )1.Shortly after the accident two police were sent to the spot to keep order. A.hundred B.hundredsC.hundreds of D.hundred of【答案】 A【解析】 hundred 前有数词修饰时不能加“s”,表确数;无数词修饰时后面要加s,且跟介词of,即hundreds of,表约数,是“数以百计的”的意思。( )2.Every year watch NBA on TV. A.million people B.millions of peopleC.millions people D.million of people【答案】 B【解析】 同hundred 的用法。millions of 是“数以百万计的”的意思。( )3.There are days in a year. A.three hundreds sixty fiveB.three hundreds and sixty fiveC.three hundred and sixty fiveD.three hundred and sixty five【答案】 C【解析】 “三百六十五”用英语表达为:three hundred and sixty five。( )4.My brother is in . A.Three Class,One Grade B.Class Three,Grade OneC.Grade One,Class Three D.class three,grade one【答案】 B【解析】“几年级几班”在英语中先说班级,再说年级。“一年级三班”应为:Class Three,Grade One。( )5.Please turn to .Let’s read the text aloud. A.Page Two B.the page twoC.second page D.page second【答案】 A【解析】 “第二页”可以表示为:page two 或 the second page。( )6.—I’m going to see Mr.Smith after school this afternoon.—All right! I’ll wait for you at . A.ten forty B.ten past fourC.half to four D.two ten【答案】 B【解析】 “四点过十分”表示为:ten past four。( )7.He began to work there . A.on his fifty B.at age of fiftyC.when he fifty D.in his fifties【答案】 D【解析】 “在某人几十岁时”表示为:in one’s+序数词第20~90的复数形式。“在他五十多岁时”表示为:in his fifties。( )8.The bridge is one hundred . A.meter long B.meter alongC.meters long D.meters along【答案】 C【解析】 one hundred修饰可数名词的复数,后面再跟表示长、宽或高等的形容词。( )9.There are months in a year.December is the month of the year. A.twelve;twelve B.twelve;twelfthC.twelfth;twelve D.twelve;twelveth【答案】 B【解析】一年有12个月,用基数词;而十二月是一年中的第12个月,用序数词。( )10.Sunday is the day of the week. A.seventh B.first C.second D.third【答案】 B【解析】常识题。星期天是一周的第一天。( )11. of the students are girls in our class. A.Two three B.Two threesC.Two thirds D.Second three【答案】 C【解析】分数的表示法:分子用基数词,分母用序数词。若分子大于一,分母要加“s”。( )12.The price of such material was reduced . A.by 18 percent B.to 18 percentC.at 18 percent D.for 18 percent【答案】 A【解析】价格减少或增加多少百分比,介词要用by。( )13.The Olympic Games are held . A.every four year B.every four yearsC.every three years D.every fourth years【答案】 B【解析】 “每四年”“每隔三年”用英语表达是:every four years/other three years。( )14.The speech is likely to last ,so I’ll be back at 9∶00 p.m.. A.two and a half hour B.two hours and half an hourC.two and a half hours D.two hour and a half【答案】 C【解析】“两个半小时”可表达为:two and a half hours 或 two hours and a half。( )15.The old fisherman cast the net ,but still caught no fish. A.a third time B.the third timeC.three time D.the third times【答案】 A【解析】 序数词前加定冠词表示“第几”,加不定冠词表示“又一”“再一”。 展开更多...... 收起↑ 资源预览