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学校班级姓名专项四数词考点一基数词
1.基数词构成10—12单独记如zeroonetwothree等213一19的词尾都是teen如fourteenseventeen但13—thirteen15一fifteen18―eighteen需要特殊记3203040等整数的基数词均以ty结尾如20一twenty30一thirty40一forty50—fifty80一eighty等4几十几”要力口连字符号如48一forty-eight97一ninety-seven等5“几百几十”或者“几百几十几”在“百”后加and如156—onehundredandfifty-six509-fivehundredandnine等6四位数或者四位数以上的基数词的拼写规律用逗号从右往左每三位加一个逗号,第一个逗号读作thousand千,第二个逗号读作million百万,第三个逗号读作billion十亿,hundred后另U忘了“and”如3610=threethousandsixhundredandten;94295=ninety-fourthousandtwohundredandninety-five;274350=twohundredandseventy-fourthousandthreehundredandfifty等
2.用法1hundredthousandmillionbillion词尾后是否加s
①表示概数、不确切的数字时,加s”与of构成短语即hundredsof成百上千的,thousandsof成千上万的,millionsof数以百万的,billionsof数以十亿的
②表示确切数字,用在具体数字之后时,不加“s例|如twohundredtrees2表示不确切的岁数时,常用几十的复述形式例如Hebecomeaprofessorinhisthirties.他三十多岁是成了教授3基数词数量表示法
①表示长、宽、高等,用基数词+单位词meterfootinch等+形容词(longwidehigh等)表示,或者用基数词+单位词+in+名词(lengthwidthheightweight等)表示例如twometerslong或twometersinlength2米长
②表示时间、距离时,使用含数词的名次所有格形式作定语fiveminutes;walk步行5分钟(的距离)IfsthreekilometersdistancefromourcampustotheBellTower.从我们校园到钟楼有三千米远
③表示温度时,用belowzero表示零下温度,温度用“基数词+degree(s)+单位词(centigrade摄氏度或Fahrenheit华氏度)”表示例如thirty-sixdegreescentigrade或36℃36摄氏度Fourdegreesbelowzerocentigrade或-4℃零下4摄氏度
④“数词+名词(+形容词)”复合结构作定语时,其中的名词用单数形式,各部分间要用连字符“「来连接Sheisafive-year-oldgirl.她是一个5岁的女孩Itsafive-minutewalkfromthelibrarytotheplayground.从图书馆到操场需要走五分钟
⑤表示“比……大(或小)几倍”的说法Thisroomisthreetimesbiggerthanthatone.这个房间比那个(房间)大三倍考点二序数词
1.构成序数词用来表示顺序,一般在基数词后加后缀-th构成,但也有特殊的情况基数词变序数词,例one-firsttwo—secondthree—third.口诀基变序有规律,一,二,三特殊记,词尾字母tdd八去t九去eve要用f替,整十基数变序数,记得把y变七若是遇到几十几,只变个位就可以
2.序数词的用法
①序数词通常加定冠词the单序数词前已经有myhisher等词时,则不加冠词例如ThefirstdayofaweekisSunday.一周的第一天是星期日Thisismyfirstdayinmynewschool.这是我在新学校的第一天
②如果序数词前出现不定冠词a或an则表示“再一,又一”Wellgetoveritasecondtime.我们将再检查一遍Wevetrieditthreetimes.Mustwetryitafourthtime我们已经试过三遍了,必须再试一次即第四次吗?
③分数的表示分子用基数词,分母用序数词分子大于1分母要用复数形式例如1/3onethird1/2onehalf2/3:twothirds注意当分数用于不可数名词或代词指代不可数名词前作主语时,谓语动词用单数形式例如三分之一的面包已卖完Onethirdofbreadhasbeensoldout.五分之二的学生是男生Twofifthsofthestudentsareboys.[题组训练]试一试你一定行!2019台州Decemberisthetwelvemonthofayear.2019扬州TheoldmanstartedtolearnhowtosurftheInternetinhiseighty.TherearefivepeopleinDale!sfamily.Theyliveontheninefloor.Hewonthethreeprizeinthewritingcompetition.Buthethoughthecouldhavedonebetter.1alwaysfeelsleepyontheoneclassafteralongholiday.ItisthefourtimethatMaryhasbeentoMadrid.Sheknowsthecityverywell.Tomorrowisherfivebirthday.WhatpresentareyougoingtobuyforherYellowRiveristhetwolongestriverinChina.Trytoexerciseatleastoneaweek.Itsbetterthanyoudonothing.拓展练习May4th2019wastheanniversaryoftheMayFourthMovement.A.hundredB.hundredthC.seventyD.seventiethThehighspeedtraintravelsabout300km/handwecanalsosayittravelsabout・A.63m/sB.83m/sC.30m/sD.33m/sSupposeyouhaveelevenpensinyourhandandyoursisterasksforthree.Thenyouhavepens.Stayinginahotelforadaycostsasmuchasrentinginthecountryforaweek.A.twiceB.twotimesC.secondD.two专项四数词参考答案题组训练
1.twelfth
2.eighties
3.ninth
4.third
5.first
6.fourth
7.fifth
8.second
9.once拓展训练LB
2.B
3.8/eight
4.A。