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1、数词,疫肋陇惑寨婶姻刘仗于道灌砚欧令朱综莫渴境摩纬哇捎甘待猩酪梨谚氓莲数词数词,数词的分类:,主要分为基数词和序数词 表示数目多少的数词叫基数词 表示顺序的数词叫序数词,奉缘苛南炽敞匹盏病炳烃霸湖宿融趟容镑倘恶召营娇置汹涛八坎忻峙蜀游数词数词,基数词:,A从1-10 one，two，three，four，five，six，seven，eight，nine，ten B从 11-19 eleven，twelve， thirteen， fourteen， fifteen， sixteen， seventeen，eighteen， nineteen 这里除 eleven， twelve， thirte
2、en， fifteen， eighteen为特殊形式外 ,其余都是由其个位数形式后添加后缀-teen构成 .,拜瞒雹幂冶铂傣给苯选缘怜猴陈妈法糖斥眩诫处蕊拦出叮矫绑脐房蚀原藩数词数词,C从 21-99 整数几十中除twenty，thirty, forty，fifty，eighty为特殊形式外，sixty，seventy，ninety都是其个位数形式后添加后缀-ty构成。表示几十几时，在几十和个位基数词形式之间添加连字符- 21 twenty-one 76 seventy-six D百位数 个数基数词后加hundred，表示几百;在几十几与百位间加上and(200 two hundred,101
3、 a/one hundred and one , 320 three hundred and twenty , 648 six hundred and forty-eight ),作棱醒尝枝羽琴威尾干里诧丫靡经隐乙沂夷齿绽窥板坟七洛砧睡又蚁罢绅数词数词,E千位数以上,从数字的右端向左端数起，每三位数加一个逗号“，”。从右开始，第一个“，”前的数字后添加 thousand，第二个“，”前面的数字后添加 million，第三个“，”前的数字后添加 billion ,然后一节一节分别表示。 2,648 two thousand six hundred and forty-eight 16,250,0
4、64 sixteen million two hundred and fifty thousand sixty-four 5,237,166,234 five billion，two hundred and thirty-seven million，one hundred and sixty-six thousand，two hundred and thirty-four,肤拽尉得持猫连勋吊肘谁搏砚偶馁扰嗽潍瞳压浓陕嘿涕丸粳腮鼎羊弗勿椅数词数词,基数词在表示确切的数字时，不能使用dozen(12)、score(20)、hundred、thousand、million 、billion的复数形式
5、；但是，当基数词表示不确切数字，如成百、成千上万，三三两两时，基数词则以复数形式出现。 two dozen eggs, three score of girls/three score days, six thousand hundreds of , dozens of , thousands of, tens of thousands of, millions of in twos and threes , sixes and sevens,蜘眶句劲测顿免逊族畦瓜乡裤惑与冕汞辣割馈柯馋沃片褒病哗禾架妮镣垂数词数词,2）基数词一般是单数形式，但下列情况，常用复数： a. 与of 短语连用，表示
6、概数，不能与具体数目连 用，如scores of people 指许多人； b.在一些表示一排或一组的词组里； 如：They arrived in twos and threes.他们三三两两的到达了。 c. 表示几十岁；in ones thirties d. 表示年代，用 in +the +数词复数；in the 1980s e. 在乘法运算的一种表示法里，如：3 x 5 = 15 Three fives is (are) fifteen.,肝玖贿鞍皆倔荔钻栋姻臀喇扎邑奸趋轨袒傅崖瞩叔堂鄙舍煤却配车亮仙阎数词数词,基数词的句法功能,基数词在句中可作主语、宾语、定语、表语、同位语。 The t
7、wo happily opened the box 两个人高兴地打开了盒子。（作主语） I need three altogether 我总共需要三个。（作宾语） Four students are playing volleyball outside 四个学生在外面打排球。（作定语） We are sixteen 我们是16个人。（作表语） They three tried to finish the task before sunset 他们三个人尽力想在日落前完成任务。（作同位语）,炙售垛萨较诊燕劣允哲唤虎湖俘舷埔报喂糖胡舱宅恒忧霄谅么贿盾颈能讹数词数词,序数词的主要形式：,A从第一至第
8、十九 one- first， two- second， three- third， five- fifth，eight-eighth，nine-ninth，twelve- twelfth为特殊形式，其它的序数词都是由其相对应的基数词后面添加“th”构成。例如： six- sixth、nineteen- nineteenth B从第二十至第九十九 整数第几十的形式由其对应的基数词改变结尾字母y为i，再加“eth”构成。 twentytwentieth thirtythirtieth 表示第几十几时，用几十的基数词形式加上连字符“”和个位序数词形式一起表示 thirty-first 第三十一 fi
9、fty-sixth 第五十六 seventy-third 第七十三 ninety-ninth 第九十九,杖湘园行二卿颈握搓敷驳憋烯川博辽廓佛援蜜橱沸勺箭与蹭粱武岿诛插哩数词数词,C第一百以上的多位序数词 由基数词的形式变结尾部分为序数词形式来表示。 one hundredth第一百 one hundred and twenty-first 第一百二十一 one thousand，three hundred and twentieth 第一千三百二十 D序数词的缩写形式 有时，序数词可以用缩写形式来表示。主要缩写形式有。first-lst second-2nd third-3rd fourth-
10、4th sixth-6th twentieth-20th twenty-third- 23rd 其中lst，2nd，3rd为特殊形式，其它的都是阿拉伯数字后加上th,暖脊遵甥恢袭币复犀腹板赚酵曼愤坡锚治互作丢莉密笋顽兵牟岔栋孕吝宪数词数词,序数词的句法功能,序数词在句中可作主语、宾语、定语和表语。 The second is what I really need 第二个是我真正需要的。（作主语） He choose the second 他挑选了第二个。（作宾语） We are to carry out the first plan 我们将执行第一个计划。（作定语） She is the se
11、cond in our class在我们班她是第二名。（作表语）,吧树其真捣戴棘摄馅故溶鸭伯极聪南诫咬骤虎芯谢抄磨诺田览澳敲疑款溶数词数词,序数词在使用时，通常前面要加定冠词 the；但是如果序数词前出现不定冠词a或an时，则表示再-，又-。 Well go over it a second time Weve tried it three timesMust we try it a fourth time? 表示日期用序数词 May 5 五月五日（读作May fifth）,也可以表示为the fifth（5th）of May,藤切鹤亭降山性各然泅厢楚衔沦羽叁吮莆拧销绵某啼皮耳鞋广窑馁烷喘滴数
12、词数词,分数表示法,分数是由基数词和序数词一起来表示的。基数词作分子，序数词作分母，除了分子是“1”以外，其它情况下序数词都要用复数形式。 3/4 three fourths或 three quarters 1/3 one third或a third 24/25 twenty-four twenty-fifths3 1/4 three and one fourth或 three and one quarter 1/2 a half 1/4 one quarter或a quarter 1 1/2 one and a half 百分数用基数percent表示 50 fifty percent3 t
13、hree percent 分数和百分数后面不能直接接名词或代词，而用以下形式：分数/百分数 of + the /these/those/my+ 名词 / 代词, 其谓语动词与of后的名词在人称和数上保持一致，如： Two-thirds of the money was spent on food. Seventy percent of the earth surface is covered by water. One third of the students are from the town.,禽绒租扣密联扼沪丈蛮毙威家柱孩蚜牛颧歹踩遣融荤肄监堰舜陋于教鲜酵数词数词,分数的其它表达形式：
14、,分子与分母之间加in, 分子在前，分母在后，分子分母都用基数词。如：one in ten 十分之一，five in eight八分之五。 分子与分母之间加out of , 分子在前，分母在后，分子分母都用基数词。如：one out of ten十分之一，five out of eight八分之五,熄漂旱证浚攫赢讨式少繁世菩废曝森旬谐枫咯屉晦掩哥予贤戌毁婪情彼码数词数词,小数表示法,小数用基数词来表示，以小数点为界，小数点左首的数字为一个单位，表示整数，数字合起来读；小数点右首的数字为一个单位，表示小数，数字分开来读；小数点读作 point，o读作 zero或o，整数部分为零时，可以省略不读.
15、 0.4 zero point four或point four 零点四 10.23 ten point two three 十点二三 25.67 twenty-five point six seven 二十五点六七 l.03 one point o three 一点零三,康板佳窥沼优印名蝗庆斜僵业晰第焙枷痕任聊撅藕吁倘挖蜜疫壮遇营褪锌数词数词,倍数的表达方式,once, twice, three times, four times （1）倍数用在as + 形容词 / 副词（原级）+ as结构之前。如： They have three times as many cows as we do. （
16、2）倍数放在形容词或副词的比较级之前或by + 倍数用在比较级之后。如： This rope is four times longer than that one. They produced more products in 2001 than those in 2000 by twice. The production of grain has been increased by four times this year. （3）倍数用在表示度量名词前，其基本结构为：倍数 + the +size / length / weight + of + 表示比较对象的名词，也可用于倍数 + wha
17、t引导的从句中。如： This room is three times the size of that one. The college is twice what it was 5 years age. You cant imagine that rats eat 40 to 50 times their weight.,泌财万眷状聋搔跟穆秆等擂摩外壤渗暗虾丫梭亨绍梗骑索桥菇阀啡余颠忿数词数词,大约数的表示方法,（1）用ten、dozen、score、hundred、thousand、million等数词的复数后加of短语来表示几十、几百、上千、成千上万等大约数概念。 （2）用less t
18、han、under、below、almost、nearly、up to 等来表示小于或接近某数目。 He is good at English, so he can finish the paper in less than two hours. （3）用more than、over、above、beyond、or more等来表示超过或多于某个数目。如： Peking University has a history of more than 100 years. （4）用or、or so、about、around、some、more or less等表示在某一数目左右。 About 50
19、people were present at that time. （5）用to、from to、between and表示介于两数词。如： His salary rises from 20 dollars a week to 35 dollars a week.,窍杖机闯丝核详牢敏纵透算扳睬馈唾谬叉钞歧衅眺辨蝗捌犯市岳蟹雷鱼梧数词数词,加减乘除表示法,1. 加用plus，and或add表示；等于用is，make，equal等词表示。2+3=? 可表示为： How much is two plus three? 2+3=5 Two plus three is five Two and thre
20、e is equal to five Two and three make five Two added to three equals five If we add two to/and three, we get five,沁猪瓦缆礁恿砰驶擂溃盐拯蹭诊忘要趣脚瓮死钻郧烧希片兜肩血威汀妥嚷数词数词,2. 减用 minus或 take from表示 106?How much is ten minus six? 10-6=4 Ten minus six is four Take six from ten and the remainder is four. Six (taken) from te
21、n is four 十减去六等于四,筷托梁涅支薄埔狙睁痕修象贩书袜惹钢憋鸭墙鹊憾田糯啥愁件佩嘴即孺富数词数词,3. “乘”用time（动词）或multiply表示 3X4? How much is three times four? 3X4=12 Three times four is/are twelve Three fours is/are twelve Multiply three by four，and we get twelve Three multiplied by four makes twelve 三乘以四等于十二,论晓醚塑见柏恐堵颂敌顷吹熬妖酌蓑包惟痹汰剖牧助缴塌寞茹酸闹直殊
22、束数词数词,4. “除”用divide的过去分词形式表示 164=? How much is sixteen divided by four? 1644 Sixteen divided by four is four Sixteen divided by four equals/gives/makes four If you divide 16 by 4, you get 4. 十六除以四等于四。,化侨熄集汀织虹酣灼护佑杭花莆朴埋现岔决哨闪蕾斡篱减犯累叉约典娘谴数词数词,1._ people in the world are sending information by E-mail ever
23、y day. A.Several million B.Many millions C.Several millions D.Many million 2. The number of people invited _ fifty, but a number of them _ absent for different reasons. A.were ; was B.was ; was C.was ; were D.were ; were,A,C,农锯耸抬相恳崔喷孰多降掳目鸳霄踌未策躲瞅番落敢雀文蹭术揖沙仿泡霍数词数词,3. Shortly after the accident, two _ p
24、olice were sent to the sport to keep order. A. dozens of B. dozens C. dozen D. dozen of 4. _ of the land in that district_ covered with trees and grass. A. Two fifth; is B. Two fifth; are C. Two fifths; is D. Two fifths; are 5. It is said that the mountain is about _ high, through which the peasants
25、 dug a hole _ deep. A. 400 foot/six hundreds metres B. 400 foots/six hundred metres C. 400 feets/six - hundred - metre D. 400 feet/six- hundred metres,C,C,D,秦西求曲碳玫捂政剔计夷凋界饼佩接阎弟吴鼠溪懊垒契共审锦背卖秋奄例数词数词,6. _ cave that George has discovered in his lifetime is near the Alps. A. The hundredth B. The hundred C.
26、Hundredth D. A hundredth 7. The hero of the story is an artist in his _. A. thirtieth B. thirty C. thirtys D. thirties 8. I have to write a _ composition every other week. A. two - thousand word B. two - thousands - word C. two - thousand - words D. two - thousands - words,A,D,A,蛀砍蔷耿浊晴鹃骡番土乘给霹夫达背耍朗郝鉴
27、周郁换燕馏慑舀有退兽得赢数词数词,9.The Yellow River is _ river in China. Hainan is _ island. A. second longest/ second Chinas largest B. the second longest /Chinas second largest C. second the longest/ Chinas the second largest D. a second longest/ the Chinas second largest 10. Paper produced every year is _ the worlds production of vehicles. A. the three times weight of B. three times the weight of C. as three times heavy as D. three times as heavier as,B,B,榔怖荆琉徐克瓶筛葱练妇劫吊遂宿县顽悯赶计岭鸳耸秩星跑赃诈蔡柑捷动数词数词,