1.基数词、序数词和分数词的构成及基本用法。2.数词作主语时的主谓一致。数词主要包括基数词、序数词和分数词。基数词是表示数目多少的数词,序数词是表示先后顺序的数词。分数词由基数词和序数词构成。一、基数词1.hundred,thousand,million,billion,dozen,score等前有具体数字或several,afew等修饰时,一般不用复数;在表示不确切数目时,可用复数。如:Severalmillionpeopleintheworldareusingthisbrandoftoothpasteeveryday.Myteacherwenttothebookstoreandboughtdozensofbooks.2.表示年岁时,用“inone’s+逢十的基数词的复数”。如:inhisforties。3.表示年代时,用“inthe+逢十的基数词的复数”。基数词的复数若用阿拉伯数字表示,可直接加s,也可加’s。如:inthe1950’s/1950s。二、序数词1.序数词前通常要加定冠词the或与物主代词一起使用,在句中可作主语、宾语、定语和表语等。2.序数词前也可加不定冠词,表示“再一,又一”。如:athirdtime,athirdandafourth等。三、分数词1.分数词是由基数词和序数词构成,分子用基数词表示,分母用序数词表示;除了分子为1的情况下,序数词都要用复数形式。如:1/3onethird;3/5threefifths。2.“分数/百分数+of+名词/代词”作主语时,谓语动词的数与名词或代词的数保持一致。如:Two-thirdsofhersparetimeisspentonhousework.80percentofthehousesweredamagedinthebigearthquake.四、常见考点高考对数词的考查主要集中在年龄表达法、年代表达法、序数词前加冠词及数词作主语时的主谓一致等。【考例】One-thirdofthecountry_______coveredwithtreesandthemajorityofthecitizens_____blackpeople.(湖南2011)A.is;areB.is;isC.are;areD.are;is根据括号内的汉语提示补全下列句子(每空一词)。1.Early______________(二十世纪七十年代)noonehadanyideathatthewomanwouldbecomeamillionairebyplantingflowers.inthe1970s2.Thereareagreatmanyoverseasstudentsinouruniversity,___________________(他们当中五分之二)comefromAsia.3.Everydayinmodernsociety_________________________(几百万顾客)goshoppingontheInternet.4.____________________(每三年),scoresofstudentsfromtheforeignlanguageschoolaresenttoBritaintolearnEnglish.Everythreeyearstwo-fifthsofwhommillioncustomersseveral5.Youcangototherailwaystationonfoot.Itisonly____________________(十分钟的旅程).6.Accordingtotherules,ifyouare__________________________(十八岁以下),youaren’tadmittedintotheclub.7.Tomlookedquitehealthythoughhewas________________(七十多岁了).inhisseventiesaten-minutetripeighteenyearsoldunder