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1、英语中的数词包括基数词和序数词两大类,它们的用法非常复杂,为了便于同学们系统地复习数词,现就小学阶段数词的主要内容作以下归纳。一、基本构成(一)基数词一一从1数到n1.1一12的基数词是独立的单词,即:one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve□2.13—19的基数词以・teen结尾。如I:fourteen,seventeen等,但13,15,18较特殊,13一thirteen15—fifteen18一eighteeno3.20一90的整十位均以-ty结尾。如:sixty,ninety,但20,30,
2、40,50,80较特殊,20一twenty,30一thirty,40一forty,50一fifty,80—ighty。4汁位数与个位数之间要加连字符号如:28一twenty-eight,96一ninety-sixo5.百位和十位(若无-H立则和个位)之间加and,如:148—nehundredandforty-eight,406—fourhundredandsixo6.hundred(百),thousand(千),million(百万),billion(十亿)等前面即使有具体的数词,也不能在它们的后而加s。如I:600一sixhundred,8百万一eightmillion□7.1
3、000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什亿)。英语中无“万"这个词,我们可以用“几十个千(thousand)^示几万,“几百个千(thousand)^^表示"儿十万"。女U:2,510=twothousandfivehundredandten;84,296=cighty-fourthousandtwohundredandninety-six;274,350=twohundredandseventy-fourthousandthreehundredandfiftyo8.
4、hundred,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hundredsofyoungpeople;数以千计的书thousandsofbookso注意:hundredsof/thousandsof/millionsof+复数名词,其前面不能加具体的数词,但可加several或many。hundredsofnewbuildingshavesprungupherethisyear.thousandsuponthousandsofpeopleinsouthafricaarerisingagainsttheiroppressors.t
5、housandsandthousandsofpeoplecometovisitthecityeveryday.millionsofdollarshavegoneintothebuildingofthisfactory.(二)序数词__由基数词转变而来,表示“这是第n个”(二)序数词__由基数词转变而来,表示“这是第n个”1•口诀巧记基数词变序数词「一、二、三,特殊记,八去九去“e”,“ve”要用于替,见V变成“i”和“护词尾加上“th”,若是遇到几十几,只变个位就可以。'‘第一、第二、第三分另lj:first,second,third,eight—eighthnine—ninth,
6、five一fifth,twelve一twelfth,twenty一twentieth,forty一fortieth,twenty・five——twenty-fifth。2其余情况均在基数词后加tho女口:six一sixth,nineteen一nineteenth,hundred一hundredth,thousand一thousandth等。3.序数词有时用缩写形式:first——1st,twenty一second22th.二、基本用法(一)基数词的基本用法1•定语fiftythousandlondondockersareoutonstrike.2•主语数词作主语,谓语动词用单数。如
7、:twomonthsisquitealongtime.fiveisanoddnumber.3•宾语或介词宾语howmanydoyouwant?eight,please.thecityhasapopulationoffourmillion.4•表语wearealtogetherfourteen.fiveplussevenistwelve.5•同位语whatworkareyoutoassignusthree?isthereroomforustwo?6•基数词+单数名词+形