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1、数词,数词包括基数词和序数词两大类,1112的基数词是独立的单词,即:one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve。21319的基数词以-teen结尾。如:fourteen,seventeen等,但13,15,18较特殊,13thirteen 15fifteen 18eighteen。32090的整十位均以-ty结尾。如:sixty,ninety,但20,30,40,50,80较特殊,20twenty 30thirty 40forty 50fifty 80eighty。,4十位数与个位数之间要加连字符号“-”,如:
2、28twenty-eight,96ninety-six。5百位和十位(若无十位则和个位)之间加and,如:148one hundred and forty-eight 406four hundred and six。6hundred(百),thousand(千),million(百万),billion(十亿)等前面即使有具体的数词,也不能在它们的后面加s。如:600six hundred,8百万eight million。71000以上的数字,从后往前数每三位加一个逗号“,”第一个逗号前为千(thousand),第二个逗号前为百万(million),第三个逗号前为billion(十亿)。英语中
3、无“万”这个词,我们可以用“几十个千(thousand)”表示几万,“几百个千(thousand)”表示“几十万”。如:2,510two thousand five hundred and ten;84,296eight-four thousand twohundred and ninety-six;274,350two hundred and seventy-four thousand three hundred and fifty。,8hundred,thousand,million用复数形式修饰名词时要用“of复数名词”,如:数以百计的年轻人hundreds of young peopl
4、e;数以千计的书thousands of books。注意:hundreds of thousands ofmillions of 复数名词,其前面不能加具体的数词,但可加several或 many。,基数词变序数词可利用口诀巧记:“一、二、三,特殊记,八去“t”,九去“e”,“ve”要用“f”替,见“y”变成“i”和“e”,词尾加上“th”,若是遇到几十几,只变个位就可以。”第一、第二、第三分别:first,second,third,eighteighth nineninth,fivefifth,twelvetwelfth,twen-tytwentieth,fortyfortieth,twe
5、nty-fivetwenty-fifth。2其余情况均在基数词后加th。如:sixsixth,nineteennineteenth,hundred hundredth,thousandthousandth等。,1钟点的表示:小时、点钟、分钟、秒钟要用基数词。“几点钟”用基数词加oclock。oclock可省略。如:现在是5点钟Its five(oclock)“几点过几分,30分钟”用介词past。如:7:05five past seven;7:15fifteen(a quar-ter)past seven;7:30half past seven。“差几分几点”用介词“to”。注意:整点加“1”
6、且用 60减去目前的分钟数。如:7:40twenty to eight;7:45fifteen(a quarter)to eight。日常生活中的时间读法常常简化,直接按基数词的顺序读。如:7:05seven o five;7:15 seven fifteen。1编号的表示:Lesson One the first lesson第一课;Bus No3the No3bus 23路公共汽车;表示住所时不用“No”如:302房间Room 302(读作:room three o two);如果编号的数词比较长,一般用基数词。如:Page 457第457页;电话号码,用基数词,可单个读,重复的数字也可读
7、“double”,如:3855633three eight five five(double five)six three three(double three)。,3年月日的表示:年份用基数词,先读前一位或两位,再读后两位。如:1999nine-teen ninety-nine;1900nineteen hundred;2000two thousand;1905nineteen o five;年用基数词,日用序数词。如:1998年6月8日写作:June 8,1998;读作:June the eighth,nineteen ninety-eight或the eighth of June,nin
8、eteen ninety-eight。4分数的表达:分子用基数词,分母用序数词,分子大于“1”,分母则加“s”。如:13 one third,23two thirds;12 a(one)half,14one fourth或a(one)quarter,34threefourths或three quarters。5倍数的表达:一倍用once,两倍用 twice,两倍以上用基数词times。如:5倍five times。,四、特殊用法 1数词作主语,谓语动词用单数。如:Two months is quite a long timeFour and two is sixWhats two and th
9、ree?2一个半小时(一年半,一个半月可类推)onean hour and a half one and a half hours。3不定冠词用在序数词前表又一、再一。如:Ive tried three times,let me try a fourth time意为:我已经试过三次,让我再试一次吧。,1There are_(365)days in a year(99河北)2Look!There are _(成千上万的)stars in the sky(99河南)3 _(23)of the students are girls in our class(99哈尔滨)4September is
10、the _month of the year(2000新疆)5There are forty-six students in Class _(三班)(2000苏州市)6December is the_ and last month of the year(2000武汉市)7Ann received a lot of presents on her _ birthdayThe twelve-year-old girl felt very happy(2000太原市)8There are_ students in our class,twenty boys and twenty girls(99甘肃)9Our teacher often tells us that work must come _(99山西)10At the beginning of the _(twenty)century,the worlds population was about 1,700 million(99辽宁),three hundred and sixty-five,thousands of,Two thirds,Two thirds,ninth,Three3,twelfth,forty,twelfth,first,Twentieth,