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1、英语数词用法数词分基数词和序数词两类。一、数词的分类1.基数A从110one，two，three，four，five，six，seven，eight，nine，tenB从1119eleven，twelve，thirteen，fourteen，fifteen，sixteen，seventeen，eighteen，nineteenC从2199特殊:twenty，thirtyforty，fifty，eighty21twenty-oneD百位数101ahundredandoneE千位数以上thousandmillion百万billion十亿F1)基数词表示确切的数时，不用复数形式.2)表示不确切数，如
2、成百、成千上万，则用复数。Therearehundredsofpeopleinthehall320threehundredandtwentyG人的不确切岁数或年代，用几十的复数形式。HebecameaprofessorinhisthirtiesItwasinthe1960sH基数词的句法功能可作主语、宾语、定语、表语、同位语。Thetwohappilyopenedthebox（作主语）Theythreetriedtofinishthetask（作同位语）2.序数词表示顺序的词称为序数词。A第一至第十九特殊:first，second，third，fifth，eighth，ninth，twelft
3、h其他:添加“th”。如sixth、nineteenthB从第二十至第九十九变y为i，再加“eth”构成。twentytwentieththirtythirtieth表示第几十几时，用几十的基数词+连字符“”+个位序数词。thirty-first第三十一fifty-sixth第五十六seventy-third第七十三ninety-ninth第九十九C序数词的缩写形式:阿拉伯数字后加上th。irstlstsecond2ndthird3rdfourth4thtwentieth20thtwenty-third23rdD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。Thesecondiswh
4、atIreallyneed（作主语）Hechoosethesecond（作宾语）Wearetocarryoutthefirstplan（作定语）Sheisthesecondinourclass（作表语）注：通常前面要加定冠词the；但出现不定冠词a或an时，则表示“再”，“又”。Wellgooveritasecondtime另外，基数词也可以表示顺序。thefirstlessonLessonOnethetwenty-firstroomRoom21（twenty-one）二、时刻表示法1.几点钟5:00读作fiveoclock2.几点过几分fivepastseven七点过五分halfpastsi
5、x六点半aquarterpasteight八点过一刻3.几点差几分tentoeight差十分八点aquartertotwelve差一刻十二点twentytosix差二十分六点anotherothermore修饰数词的用法1.anotherA)another+名词单数B)表“另外的、额外的、附加的时，+few或具体数字的复数1Haveyoufinishedyourreportyet？No，Iwillfinishitin10minutesAanotherBOtherCmoreDless2Thestrikemaylastanotherthreedays罢工可能还要持续三天。2.other+复数名词，
6、置于数词之后B)但与定冠词the连用时，other要放在数词前。1Tonyisgoingcampingwith_boysnextSundayAlittletwootherBtwolittleotherCtwootherlittleDlittleothertwo3Doyouknowwherehefoundtheothertwophotos？另外两张照片3.more1more1）Shehasgotfivemoreelectricfans她还有五台电扇。2more还可与alittle，afew，alot，several等词连用（1）Therearemanymoredictionariesonthed
7、esk课桌上有许多词典。（2）Wouldyoulikesomemoretea？再喝点茶好吗？4.名词省略如果前后意思清楚，another或more后面的名词可以省去。如：1Iclimbedthestairsslowly，carryingabigsuitcase，myfatherfollowingwithtwomore四、加减乘除表示法1.“加”用plus，and或add表示HowmuchistwoplusthreeItisfiveTwoandthreeisequaltofive2.“减”用minusHowmuchistenminussix3.“乘”multiply3X4Howmuchisthr
8、eetimesfour4.“除”用divide的过去分词形式表示164=Howmuchissixteendividedbyfour五、分数表示法1.基数词作分子，序数词作分母，除了分子是“1”，其它情况下序数词都要用复数形式2.当分数后面接名词时，如果分数表示的值大于1，名词用复数；小于1，名词用单数。112hours一个半小时（读作oneandahalfhours）七、百分数表示法百分数用基数percent表示50fiftypercent百分之五十percent不用复数形式。选择填空。1Marchis_monthofayearAathreeBthethirdCathird2Wewillhav
9、eameetingat8:05_AfivetoeightBeightfiveCeightofive3Eightpluseightis_.AsixteenBsixty-fourCone4Heisan_boyAeightyearsBeight-year-oldCeight-years-old5Wewillhavea_walkAtenminutesBtenminutesCten-minutesBthethirdCeightofiveAsixteenBeight-year-oldBtenminutes6Thewallis_.AfourmeterslongBfourmeterlongCfour-mete
10、rlong7WhatsthedatetodayIts_AMarchtheeightBMarcheighthCeight，March8Ithappenedinthe1040sAinthefortiesoftheeleventhcenturyBinthefortiesofthetenthcenturyCintheforty9About_oftheearthssurfaceiscoveredwithwater.A.three-foursB.three-fourthC.three-fourthsAfourmeterslongBMarcheighthAinthefortiesoftheeleventhcenturyC.three-fourths10.Hewentdowntothevillagewhichwas_milesawayfromthecity.A.threehundredsB.threehundredC.threehundredsofB.threehundred
