语法复习第四讲：数词I、重点难点解析数词是用来表示事物和数量的顺序的词，分为基数词和序数词两种。基数词功能做主语、宾语、表语、定语、同位语读法三要点A．记31个词：基数词1~19，20~29整十位数和hundred,thousand,million,billionB．会读个、十、百位数C．由右向左每三位数前的逗号分别读做thousand,million和billion,逗号之间的按百位以内的数读注意A．表示“几百”、“几千”时，hundred,thousand等词不加sB．hundred,thousand等词为复数时做名词，表示“数量很多”的意思序数词构成A．一般的基数词后+th，多位数的基数词只变最后一位。如：ten→tenthB．整几十的基数词，去掉词尾的y再加ieth，如：thirty→thirtiethC．几个不规则词：first,second,third,fifth,eighth,ninth,twelfth功能做定语，前面加the；年、月、日中的日；表示“第几”时；分数中的分母一基数词：表示数目的词为基数词，它的构成如下表：范围特点实例1~12无规律one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve13~19以teen为结尾thirteen,fourteen,fifteen,sixteen,seventeen,eighteen,nineteen20~90以ty结尾twenty,thirty,forty,fifty,sixty,seventy,eighty,ninety21~99十位与个位之间要加连字符“-”twenty-five,sixty-five,ninety-nine101~999百位与十位之间通常用andthreehundredandtwenty-five（美语中常将and省略）千以上6275—sixthousandtwohundredandseventy-five；1200—twelvehundred二序数词：表示顺序的数词为序数词，它的构成如下表：范围特点实例1~19各基数词尾加th其中七个例外：first,second,third,fifth,eighth,ninth,twelfth,其余，如：four—fourth,six—sixth,nineteen—nineteenth20,30~90把y变i后加ethtwentieth,fortieth,ninetieth21以后多位数最后一个数用序数词，其余用基数词21st—twenty-first,110th—onehundredandtenth三数词的用法：1.英语中年月日、点钟、序数词、分数词、算式列表汉语示例英语表示法时间表达2001年6月30日June30,200130June,200130thJune,2001七点二十五分（7：25）seventwenty-five/twenty-fivepasteven十二点五十四分（12:54）twelvefiftyfoursixtoone九点十五分（9：15）ninefifteenaquarterpastnine二点半（2：30）twothirtyhalfpasttwo二十一点五十分（21：50）twenty-onefifty9:50p.m.数字表达第二十一twenty-first第一百二十三onehundredandtwenty-third二分之一ahalf二又五分之二twoandtwo-fifths百分之二十20percent20percent编号表达第七路公共汽车BusNumber7第201房间Room201人民路153号153RenminRoad第三中学No3MiddleSchool算式表达4+8=12Fourpluseightistwelve11－7=4Elevenminussevenisfour.6×5=30Sixtimesfiveisthirty.20÷5=4twentydividedbyfiveisfour.A＞BAismorethanB.A＜BAislessthanB.A≈BAisapproximately(近似地,大约)equaltoB.A≠BAisnotequaltoB.2.约数表示法列表含义英语表达例句大于某数morethanHehaslivedhereformorethantwentyyears.oversheisoverfifty.ormoreThere'rethirtypeopleormoreinthemeeting-room.小于某数lessthanIhavelessthan(notmorethan)fiftydollars.underChildrenundersevenarenotallowedtoenter.belowHewouldnotsellitforbelowahundredfiftydollars.orlessThecoatmightcosthimsixtydollarsorless.大约（某数）nearlySheisnearlyfiftynow.almostIt’salmostthreeo'clock.uptoUptotenmencansleepinthistent.orHespentfourorfivedayswritingthearticle.orsoThedistanceistwentymilesorso.aboutIvisitedthatvillageaboutthreeyearsago.someTheirteamhassomefourorfiveplayers.moreorlessThecontainercanholdmoreorlesstwentypoundsofwater.around/roundLet'smakeitround/aroundeighto'clock.3.不定数量词“多”的表示法列表被修饰名词的数英语表达汉译修饰可数名词dozensof几十、许多scoresof许多Many/agood(great)many,manya(饰单数可数名词)许多、大量hundredsof数以百计thousandsof/thousandsuponthousandsof成千上万millionsof数百万billionsof亿万修饰不可数名词much,agreat(goo...
