《語法專項訓(xùn)練》PPT課件.ppt

語法專項訓(xùn)練(五)數(shù)詞,英語數(shù)詞即表示數(shù)目多少或順序先后的詞.數(shù)詞有兩種:基數(shù)詞和序數(shù)詞.表示數(shù)量多少的叫基數(shù)詞,表示次序的叫序數(shù)詞.注意以下數(shù)詞的拼寫:,one,thefirst；two,thesecond；three,thethird；four,thefourth；five,thefifth；nine,theninth；twelve,thetwelfth；fifteen,thefifteenth；nineteen,thenineteenth；twenty,thetwentieth；twentyone,thetwentyfirst；thirty,thethirtieth；forty,thefortieth；eighty,theeightieth；ninetynine,theninetyninth；etc.,考點一基數(shù)詞1基數(shù)詞的形式基數(shù)詞中112是獨立單詞,1319的基數(shù)詞以后綴-teen結(jié)尾,2090八個整十位數(shù)數(shù)詞以后綴-ty結(jié)尾.表示其他兩位數(shù)詞,十位與個位之間用連字符“-”:,twenty-three,seventy-five,etc.百位數(shù)與十位數(shù)之間,英式英語用and連接,美式英語一般不用:threehundredandsixty-fivedays；eighthundredandtwenty-twostudents,etc.2基數(shù)詞的用法,3.基數(shù)詞的復(fù)數(shù)形式(1)表示確切數(shù)字時,ten,hundred,thousand,million只用單數(shù)形式,不能加-s.(2)dozen(十二),score(二十),head(一頭)等表示確切數(shù)字時不用復(fù)數(shù)形式,但在表示不確切數(shù)字時要用復(fù)數(shù):,twodozenbottlesofbeer；dozensoftimes；fourscoreandsixyears；scoresofstudents(3)表示“幾十”的數(shù)詞的復(fù)數(shù)形式可用來表示人的歲數(shù)或年代.Shediedinherforties.Thisstorytookplaceinthe1950s.,考點二序數(shù)詞1序數(shù)詞的形式,2.序數(shù)詞的基本用法,考點三倍數(shù)1倍數(shù)既可以表示增加,也可以表示減少,分數(shù)也在此列；表示增加、減少時包括基數(shù),相當(dāng)于“乘、除”.(1)通常說“增加了X倍”,不包括基數(shù),純增加；若是“增加到X倍”或“是原來的X倍”,則包括基數(shù).,Themachineimprovestheworkingconditionsandraisesefficiencyfourtimes.這種機器改善了工作條件,提高了4倍的工作效率.,(2)分數(shù)的構(gòu)成:基數(shù)詞序數(shù)詞；基數(shù)詞(分子)大于1時,序數(shù)詞(分母)用復(fù)數(shù).onethird1/3,onefifth1/5,onetwentieth1/20,twofifths2/5,threesevenths3/7,fiveninths5/92倍數(shù)比較的表示法,.單句填空用括號里適當(dāng)?shù)膯卧~或短語完成下面的句子1Ittookusquitealongtimetogettotheamusementpark.Itwas_(athree-hours,athree-hour)journey.,athree-hour,解析:考查“不定冠詞基數(shù)詞連字符單數(shù)名詞”的用法.連字符連接的詞作定語且其中的名詞用單數(shù).,2Itisreportedthatthefloodshaveleftabout_(twothousand,twothousands)peoplehomeless.解析:hundred,thousand,million等前面有具體的數(shù)字表達具體的數(shù)量時,這些詞不用復(fù)數(shù),后面不加of；運用復(fù)數(shù)時,后面加of則表達“概數(shù)”.,twothousand,3Several_(million,millions)peopleintheworldaresendinginformationbye-maileveryday.,million,4Hehasread_(hundred,hundreds)ofbooksinhislife.解析:hundred前面沒有具體數(shù)字,后of應(yīng)用復(fù)數(shù),表示“概數(shù)”.,hundreds,5_(Twofifth,Twofifths)ofthelandinthatdistrict_(is,are)coveredwithtreesandgrass.解析:考查分數(shù)表達.分子大于1時,分母要加s.分數(shù)表示整體的一部分,謂語用單數(shù).,Twofifths,is,6Hedidit_(one-thirdtime,one-thirdthetime)ittookme.解析:考查倍數(shù)the名詞.,one-thirdthetime,7LouiseBrown,the_(worldstest-tubefirstbaby,worldsfirsttest-tubebaby)is70yearsoldnow.,worldsfirsttest-tubebaby,8Ihear_(quiteafew,quitealittle)boysinyourschoollikeplayingfootballintheirsparetime,thoughotherspreferbasketball.解析:根據(jù)后面的“boys”是可數(shù)名詞,few修飾可數(shù)名詞,故填quiteafew.,quiteafew,9Itisnotrareinthe_(90,90s)thatpeopleintheir_(fifty,fifties)aregoingtouniversityforfurthereducation.解析:前者指年代,用“the基數(shù)詞的復(fù)數(shù)”；后者指年齡,用“ones基數(shù)詞的復(fù)數(shù)”.,90s,fifties,10Shewenttothebookstoreandbought_(dozensofbooks,dozenbooks)解析:dozen意為“一打,十二個”,與數(shù)詞連用時要用單數(shù),與of連用時要用復(fù)數(shù)形式.dozensof意為“若干,許許多多”.,dozensofbooks,.語篇填空根據(jù)括號內(nèi)的漢語提示用適當(dāng)?shù)臄?shù)詞完成下面的短文.Haveyoueverseen1._(一個)chimpanzee(黑猩猩)inazoo？Ifnot,betterrunandseeone.Why？Becausetheyreindangerandtheremaysoonbenoneleft.,a/one,Chimpanzeeswereoncefoundin2._(許多)Africancountries.But,lastweekaUnitedNationsreportsaidthattheyaredisappearingfromsomecountriesfast.InSenegal,forexample,many/agreatnumberof,thereareonly3._(二百)left.Thereusedtobe4._(幾千)Chimpanzeesarealsoindangerinotherpartsoftheworld.Chimpanzeesareakindofgreatape.Therearethreeotherkindsofgreatape:gorillas,twohundred,severalthousand,gibbonsandorangutans,whichareallindanger.Thereareabout5._(四十萬)greatapesintheworld.“Theyallfaceextinction,somesoon,otherswithin6._(五十五年),”,fourhundredthousand,fifty-fiveyears,saysKlausTopers,headoftheUNEnvironmentprogramme.“Over7._(百分之九十六)ofgreatapesDNAislikeours.Ifwelosethem,wewilldestroyapartofourselves,”saysKlaus.,ninety-sixpercent,Whyarechimpanzeesindangerandhowcanwesavethem？Thatsbecauseofhumans.Wearekillingthemanddestroyingtheforestswheretheylive.AccordingtotheUNreport8._(數(shù)千計的)chimpanzeesdieeachyearbecauseofhumans.,thousandsof,Somepeoplekillthemformoney.But9._(三分之二)ofthemdieafterhumanscutdowntheforestswheretheylive,whichmeansgreatapeshavenoplacetoliveandnofoodtoeat.,two-thirds,Lastweek,scientistsfrom10._(四分之三的)thecountriesoftheworldmetinParis,France,andmadeareporttellingcountrieshowtoprotectapes.,threefourths/quartersof,本部分內(nèi)容講解結(jié)束,按ESC鍵退出全屏播放,