基数词和序数词.docVIP

基数词和序数词一 表示数目多少的词叫基数词： 100以下的基本基数词100以上1-1011-1920-90100a/one hundred;1000a/one thousand;1,000,000a/one million;1,000,000,000a/one billion（美）a/one thousand million(英)1 one11 eleven20 twenty2 two12 twelve30 thirty3 three13 thirteen40 forty4 four14 fourteen50 fifty5 five15 fifteen60 sixty6 six16 sixteen70 seventy7 seven17 seventeen80 eighty8 eight18 eightteen90 ninety9 nine19 nineteen10 ten二 表示顺序的数次叫序数词：基本序数词的构成1st first11th eleventh20th twentieth30th thirtieth2nd second12th twelfth21st twenty-first40th fortieth3rd third13th thirteenth22nd twenty-second50th fiftieth4th fourth14th fourteenth23rd twenty-third60th sixtieth5th fifth15th fifteenth24th twenty-fourth70th sevenyieth6th sixth16th sixteenth25th twenty-fifth80th eightieth7th seventh17th seventeenth26th twenty-sixth90th ninetieth8th eighth18th eighteenth27th twenty-seventh100th one hundredth9th ninth19th nineteenth28th twenty-eighty1,000th one thousangth10th tenth29th twenty-ninth1,000,000th one millionth100,000,000th one billionth注意： Hundred thousand million1. 其前有具体数字时，用单数： There are thousand students in this in this school.这所学校大约有2000名学生。2. 前无数词，模糊数字+s+of短语: Hundreds of people come to see our play.Its so great.成百的人来看我们的戏剧，它太成功了。3. 基数词变序数词口诀：基变序，很容易，结尾加上th。一二三特殊记，结尾各是t,d,d。八去t,九去e,f来把ve替，y改为ie,结尾仍有th。若是遇到几十几，只变个位就可以。三 基数词的用法：1. 基数词在句中可用作主语、宾语、表语、定语和同位语。主语： Four of them went to the factory. 他们四个人去了工厂。宾语： I want two. 我要两个。定语： There thirty classrooms in our school. 我们学校有30个教室。表语： My classmate is eighteen. 我的同学18岁。 He is only three,and he cant dress himself. 他只有三岁，不会穿衣服。同位语： We three will go there together. 我们3个一起去。注意：1以上的基数词作定语时，它所修饰的名词要用复数形式：The road is 16 meters in width. 这条路十六米宽。18 American students came to our school yesterday. 昨天有18个美国学生来到我校。四序数词的用法：1.序数词可以在句子中当主语、宾语、定语、表语。主语： The second is what I really need. 第二个是是我真正需要的。宾语： He chose the second. 他选了第二个。定语： We are carry out the first plan. 我们将执行第一个计划。表语： She is the second in our class. 在我们班她是第二名。注意：1. The nine students are in Class Five.这九个学生都是五班的。2. The ninth student is in Class Five.第九个学生是五班的。3. 序数词前用不定冠词的常见情况： 序数词前加“a”表“再一次”。May I have a second try?我能再试一次吗？Now tell me why you took a second arrow. 告诉我，为什么你手里拿着另一支箭？ 在名次中排“第几”You should try to get a first or a second in the examination.你应力争在这次考试中得个第一、二名。 表示任何一个“第几者”。We dont allow a third to have a hand in this matter. 我们不允许第三者插手此事。 当“分数词”用表示“几分之几”。A third of the students failed in the exam. 三分之一的学生在这次考试中没及格。五时间表达法：1.顺序法 seven five 7:05 seven fifty-two 7:52 seven thirty 7：302.先分钟后时刻法：整点用oclock,半点用half.30用to，30用past.15和45分钟用quarter(0.25 15分钟)8 oclock 八点half past eight a.m. 上午八点半a quarter to twelve 差一刻12点twenty-nine to eight 差29分八点twenty-nine past eight 8:29六数词的固定搭配：in one 合为一体 one and the same 同一个on one hand 一方面 by twos 成双成对in two 一分为二 second to none 首屈一指five-star 一流的；五星的 at sixes and sevens 乱七八糟ten to one 十分之九 a hundred and one 许多in twos and threes 三三两两；稀稀拉拉 It takes two to do something 双方均有责任。Two heads are better than one 三个臭皮匠，顶个诸葛亮七年、月、日的顺序：日、月、年 5 Jane 2005月、日、年 Jane 5 2005in the 1990s (nineteen nineties) 20世纪90年代724B.C.=seven four two B.C. 公元前724年2000A.D. 公元2000年八年龄表达法：一个十七岁的女孩 a 17-year-old girl a girl 17 years old a girl of 17 a girl aged 17其他：416房间：Room 4161路公共汽车：Bus 1幸福大街81号：No.81,Xingfu street电话号码256-9905：Tel.No.two five six nine nine(两个9也可表示为：double nine)0(零)five邮政编号100056;Postcode/Zip code one 0(零)0 0 five six5.078:five point zero seven eight1/3:one-third3/5:three-fifths8%:eight percentPage120 第120页倍数表达法：三次以上用“基数词+times”，两倍用twice或double。The earth is 49 times the size of the moon. 地球是月球的四十九倍。算式加减乘除表示法：加、乘算式中，谓语动词即可用单数也可用复数，但减、除算式中，谓语动词只能用单数。5+6=11 five and/plus six is/are/makes/make/equal/equals eleven.254=100 Twenty-five times (multiplies) four are one hundre