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數(shù)詞及其用法數(shù)詞及其用法數(shù)詞的分類(lèi):主要分為基數(shù)詞和序數(shù)詞表示數(shù)目多少的數(shù)詞叫基數(shù)詞表示順序的數(shù)詞叫序數(shù)詞數(shù)詞及其用法基數(shù)詞:A.從1--10

one,two,three,four,five,six,seven,eight,nine,ten.B.從11--19

eleven,twelve,thirteen,fourteen,fifteen,sixteen,seventeen,eighteen,nineteen.這里除eleven,twelve,thirteen,fifteen,eighteen為特殊形式外,其余都是由其個(gè)位數(shù)形式后添加后綴-teen構(gòu)成.數(shù)詞及其用法C.從21--99

整數(shù)幾十中除twenty,thirty,forty,fifty,eighty為特殊形式外,sixty,seventy,ninety都是其個(gè)位數(shù)形式后添加后綴-ty構(gòu)成。表示幾十幾時(shí),在幾十和個(gè)位基數(shù)詞形式之間添加連字符"-"

21twenty-one76seventy-sixD.百位數(shù)個(gè)數(shù)基數(shù)詞后加“hundred”,表示幾百;在幾十幾與百位間加上and.200twohundred

101a/onehundredandone,320threehundredandtwenty,648sixhundredandforty-eight數(shù)詞及其用法E.千位數(shù)以上

從數(shù)字的右端向左端數(shù)起,每三位數(shù)加一個(gè)逗號(hào)“,”。從右開(kāi)始,第一個(gè)“,”前的數(shù)字后添加thousand,第二個(gè)“,”前面的數(shù)字后添加

million,第三個(gè)“,”前的數(shù)字后添加billion,然后一節(jié)一節(jié)分別表示。

twothousandsixhundredandforty-eightsixteenmilliontwohundredandfiftythousandsixty-four

fivebillion,twohundredandthirty-sevenmillion,onehundredandsixty-sixthousand,twohundredandthirty-four2,64816,250,0645,237,166,234數(shù)詞及其用法基數(shù)詞一般是單數(shù)形式,但下列情況,常用復(fù)數(shù):dozen(12)、score(20)、hundred、thousand、million、billion等在表確切的數(shù)字時(shí)只用單數(shù)形式,但是在表示不確切數(shù)字時(shí)要用復(fù)數(shù),且與of短語(yǔ)連用。如:

確數(shù):twodozeneggs,threescoredays,sixthousandpeople

概數(shù):hundredsof,dozensof,thousandsof,

疊用:tensofthousandsof…,hundredsofthousandsof…,thousandsandthousandsof…

數(shù)詞及其用法b.在一些固定的詞組里;如:Theyarrivedintwosandthrees.

他們?nèi)齼蓛傻牡竭_(dá)了。

sixesandsevens亂七八糟c.表示"幾十歲";inone’sthirtiesd.表示"年代",用in+the+數(shù)詞復(fù)數(shù);inthe1980se.在乘法運(yùn)算的一種表示法里,如:3x5=15Threefivesis(are)fifteen.數(shù)詞及其用法基數(shù)詞的句法功能基數(shù)詞在句中可作主語(yǔ)、賓語(yǔ)、定語(yǔ)、表語(yǔ)、同位語(yǔ)1.Thetwohappilyopenedthebox.

2.Ineedthreealtogether.

3.Fourstudentsareplayingvolleyballoutside.4.Wearesixteen.

5.Theythreetriedtofinishthetaskbeforesunset(作主語(yǔ))(作賓語(yǔ))(作定語(yǔ))(作同位語(yǔ))(作表語(yǔ))數(shù)詞及其用法序數(shù)詞的主要形式:A.從第一至第十九one-first,two-second,three-third,five-fifth,eight-eighth,nine-ninth,twelve-twelfth為特殊形式,其它的序數(shù)詞都是由其相對(duì)應(yīng)的基數(shù)詞后面添加“th”構(gòu)成。例如:six-sixth、nineteen-nineteenth.B.從第二十至第九十九整數(shù)第幾十的形式由其對(duì)應(yīng)的基數(shù)詞改變結(jié)尾字母y為i,再加“eth”構(gòu)成。twenty—twentieththirty—thirtieth表示第幾十幾時(shí),用幾十的基數(shù)詞形式加上連字符“-”和個(gè)位序數(shù)詞形式一起表示thirty-first第三十一fifty-sixth第五十六

seventy-third第七十三ninety-ninth第九十九數(shù)詞及其用法C.第一百以上的多位序數(shù)詞

由基數(shù)詞的形式變結(jié)尾部分為序數(shù)詞形式來(lái)表示。onehundredth第一百onehundredandtwenty-first第一百二十一onethousand,threehundredandtwentieth第一千三百二十

D.序數(shù)詞的縮寫(xiě)形式有時(shí),序數(shù)詞可以用縮寫(xiě)形式來(lái)表示。主要縮寫(xiě)形式有。first--lstsecond--2ndthird--3rd

fourth--4thsixth--6thtwentieth--20th

twenty-third--23rd其中l(wèi)st,2nd,3rd為特殊形式,其它的都是阿拉伯?dāng)?shù)字后加上th數(shù)詞及其用法序數(shù)詞在使用時(shí),通常前面要加定冠詞the;但是如果序數(shù)詞前出現(xiàn)不定冠詞a或an時(shí),則表示"再--","又--"。

We'llgooveritasecondtime.

We'vetrieditthreetimes.Mustwetryitafourthtime?表示日期用序數(shù)詞

May5五月五日(讀作Mayfifth),也可以表示為thefifth(5th)ofMay

數(shù)詞及其用法

序數(shù)詞的句法功能序數(shù)詞在句中可作主語(yǔ)、賓語(yǔ)、定語(yǔ)和表語(yǔ)。

ThesecondiswhatIreallyneed.

Hechoosethesecond.

Wearetocarryoutthefirstplan.

Sheisthesecondinourclass.(作主語(yǔ))(作賓語(yǔ))(作定語(yǔ))

(作表語(yǔ))數(shù)詞及其用法序號(hào)表示法(1)單純的序號(hào),可在基數(shù)詞前加number,簡(jiǎn)寫(xiě)為No.。如:No.1第一號(hào)(2)事物名詞的序號(hào)表達(dá)法有所不同:①對(duì)于一些小序號(hào)用序數(shù)詞也可用基數(shù)詞表達(dá),形式分別為:the+序數(shù)詞+名詞;名詞+基數(shù)詞。如:theFirstWorldWar或WorldWarOne,Lesson8=theeighthlesson②對(duì)于一些大序號(hào)我們通常只用一種表達(dá)法,即名詞+基數(shù)詞。如:Room501,Bus538。③可用a/the+number+基數(shù)詞+名詞。如:aNo.5bustheNo.8bus數(shù)詞及其用法分?jǐn)?shù)表示法分?jǐn)?shù)是由基數(shù)詞和序數(shù)詞一起來(lái)表示的?;鶖?shù)詞作分子,序數(shù)詞作分母,分子大于1時(shí),分母的序數(shù)詞要用復(fù)數(shù)形式。

3/4threefourths或threequarters1/3onethird或athird24/25twenty-fourtwenty-fifths

1/4onequarter或aquarter

1/2ahalf11/2oneandahalf

31/4threeandonefourth或threeandonequarter數(shù)詞及其用法百分?jǐn)?shù)用基數(shù)+percent表示

50%fiftypercent

3%threepercent分?jǐn)?shù)和百分?jǐn)?shù)后面不能直接接名詞或代詞,而用以下形式:分?jǐn)?shù)/百分?jǐn)?shù)+of+the/these/those/my+名詞/代詞,

其謂語(yǔ)動(dòng)詞與of后的名詞在人稱(chēng)和數(shù)上保持一致,如:Two-thirdsofthemoneywasspentonfood.Seventypercentoftheearthsurfaceiscoveredbywater.

Onethirdofthestudentsarefromthetown.數(shù)詞及其用法分?jǐn)?shù)的其它表達(dá)形式:分子與分母之間加in,分子在前,分母在后,分子分母都用基數(shù)詞。如:oneinten十分之一,fiveineight八分之五。分子與分母之間加outof,分子在前,分母在后,分子分母都用基數(shù)詞。如:oneoutoften十分之一,fiveoutofeight八分之五數(shù)詞及其用法小數(shù)表示法

小數(shù)用基數(shù)詞來(lái)表示,以小數(shù)點(diǎn)為界,小數(shù)點(diǎn)左首的數(shù)字為一個(gè)單位,表示整數(shù),數(shù)字合起來(lái)讀;小數(shù)點(diǎn)右首的數(shù)字為一個(gè)單位,表示小數(shù),數(shù)字分開(kāi)來(lái)讀;小數(shù)點(diǎn)讀作point,o讀作zero或o,整數(shù)部分為零時(shí),可以省略不讀.

0.4zeropointfour或pointfour零點(diǎn)四

10.23tenpointtwothree十點(diǎn)二三

25.67twenty-fivepointsixseven二十五點(diǎn)六七

l.03onepointothree一點(diǎn)零三

數(shù)詞及其用法倍數(shù)的表達(dá)方式

once,twice,threetimes,fourtimes…(1)倍數(shù)+as+形容詞/副詞(原級(jí))+as+比較對(duì)象。如:Theyhavethreetimesasmanycowsaswedo.(2)倍數(shù)+形容詞或副詞的比較級(jí)+than+比較對(duì)象或by+倍數(shù)用在比較級(jí)之后。如:Thisropeisfourtimeslongerthanthatone.Theyproducedmoreproductsin2001thanthosein2000bytwice.Theproductionofgrainhasbeenincreasedbyfourtimesthisyear.(3)倍數(shù)用在表示度量名詞前,其基本結(jié)構(gòu)為:倍數(shù)+the+size/length/weight…+of+表示比較對(duì)象的名詞,Thisroomisthreetimesthesizeofthatone.(4)也可用于倍數(shù)+what引導(dǎo)的從句中。如:Thecollegeistwicewhatitwas5yearsage.數(shù)詞及其用法大約數(shù)的表示方法(1)用ten、dozen、score、hundred、thousand、million等數(shù)詞的復(fù)數(shù)后加of短語(yǔ)來(lái)表示幾十、幾百、上千、成千上萬(wàn)等大約數(shù)概念。(2)用lessthan、under、below、almost、nearly、upto

等來(lái)表示小于或接近某數(shù)目。HeisgoodatEnglish,sohecanfinishthepaperinlessthantwohours.(3)用morethan、over、above、beyond、ormore等來(lái)表示超過(guò)或多于某個(gè)數(shù)目。如:PekingUniversityhasahistoryofmorethan100years.(4)用or、orso、about、around、some、moreorless等表示在某一數(shù)目左右。About50peoplewerepresentatthattime.(5)用to、from…to…、between…and表示介于兩數(shù)詞。如:Hissalaryrisesfrom20dollarsaweekto35dollarsaweek.數(shù)詞及其用法加減乘除表示法1."加"用plus,and或add表示;"等于"用is,make,equal等詞表示。

2+3=?可表示為:Howmuchistwoplusthree?

2+3=5

Twoplusthreeisfive.

Twoandthreeisequaltofive.

Twoandthreemakefive.

Twoaddedtothreeequalsfive.

Ifweaddtwoto/andthree,wegetfive數(shù)詞及其用法2."減"用minus或takefrom表示

10-6=?

Howmuchistenminussix?

10-6=4

Tenminussixisfour.

Takesixfromtenandtheremainderisfour.

Six(taken)fromtenisfour.

十減去六等于四

數(shù)詞及其用法3.“乘”用time(動(dòng)詞)或multiply表示

3X4=?Howmuchisthreetimesfour?

3X4=12

Threetimesfouris/aretwelve.

Threefoursis/aretwelve.

Multiplythreebyfour,andwegettwelve.

Threemultipliedbyfourmakestwelve.

三乘以四等于十二

數(shù)詞及其用法4.“除”用divide的過(guò)去分詞形式表示

16÷4=?Howmuchissixteendividedbyfour?

16÷4=4

Sixteendividedbyfourisfour.

Sixteendividedbyfourequals/gives/makesfour.

Ifyou

divide16by4,youget4.

十六除以四等于四。

數(shù)詞及其用法三、時(shí)間表示法

1、鐘點(diǎn)

1)正讀法——按時(shí)間表上的數(shù)字讀;先讀鐘點(diǎn)數(shù),后讀分鐘數(shù)。如:

10:20→tentwenty/8:36→eightthirty-six2)表示幾點(diǎn)過(guò)幾分,用介詞past,多用在半小時(shí)以?xún)?nèi)(包括半小時(shí))。分鐘數(shù)在介詞的前面,時(shí)鐘數(shù)在介詞的后面,采用倒讀法。如:

9:30→halfpastnine/7:05→fivepastseven3)表示幾點(diǎn)差幾分,用介詞to,多用在半小時(shí)以上(不包括半小時(shí))。也用倒讀法。如:

8:50→tentonine/11:45→aquartertotwelve4)表示整點(diǎn)

8:00→eight(o’clock)5)表示在某個(gè)鐘點(diǎn),用介詞at。如:

Theybegintoworkathalfpastseven.(他們七點(diǎn)半開(kāi)始工作。)數(shù)詞及其用法

2、日期

1)年代用基數(shù)詞,在某年要用介詞in。如:

Hewasbornin1983.(1983讀成nineteeneighty-three)

2)月份首字母要大寫(xiě),在某月也用介詞in,如果有年代出現(xiàn),在月份名后加年代,中間用逗號(hào)。如:

IthappenedinJanuary,1999.(這事發(fā)生在1999年1月。)

3)日期用序數(shù)詞(序數(shù)詞前加the),在某日用介詞on。如:

onthefirst;ontheeighteenth

數(shù)詞及其用法4)月日同時(shí)出現(xiàn)時(shí)可有兩種表示法:英國(guó)說(shuō)法:順序?yàn)橄热蘸笤?。如?/p>

4(th)May(五月四日——讀成thefourthofMay)美國(guó)說(shuō)法:順序?yàn)橄仍潞笕?。如?/p>

May4(th)(五月四日——讀成Maythefourth)表示在某月某日,不管用在前還是在后,都用介詞on。如:

ThemeetingwillbeheldonMarch9(th).We’llleaveforShanghaion8thJune.5)年月日同時(shí)出現(xiàn)時(shí),年代位于最后,其前加逗號(hào)。如:

MarywasbornonJanuarylst,1990.6)表示“在幾十年代”用in+the+逢十的數(shù)詞復(fù)數(shù)。如:

inthe1990s/90’s/nineties

數(shù)詞及其用法

3、年齡

1)用基數(shù)詞表示年齡。如:

Heisten(yearsold).Thebabyisoneyearold.2)表示“在某人的幾十歲”時(shí),可用介詞in+one’s+整十位數(shù)的復(fù)數(shù)形式。如:

Sheisstillinhertwenties.(她才二十幾歲。)

3)表示“一個(gè)九歲的男孩”,可以有多種表達(dá)法:

aboyofnine,aboyofnineyearsold,aboyofnineyearsofage,anine-year-oldboy

注意:與基數(shù)詞合成的定語(yǔ),其中的名詞用單數(shù)。如:

athree-month-oldbaby,afive-yearplan數(shù)詞及其用法1._____peopleintheworldaresendinginformationbyE-maileveryday.A.SeveralmillionB.ManymillionsC.SeveralmillionsD.Manymillion2.Thenumberofpeopleinvited______fifty,butanumberofthem______absentfordifferentreasons.A.were;wasB.was;wasC.was;wereD.were;wereA/DC數(shù)詞及其用法3.Shortlyaftertheaccident,two_____policeweresenttothesporttokeeporder.A.dozensofB.dozensC.dozenD.dozenof4.____ofthelandinthatdistrict___coveredwithtreesandgrass.A.Twofifth;isB.Twofifth;areC.Twofifths;isD.Twofifths;are5.Itissaidthatthemountainisabout___high,throughwhichthepeasantsdugahole___deep.A.400foot/sixhundredsmetresB.400foots/sixhundredmetresC.400feets/six-hundred-metreD.400feet/six-hundredmetresCCD數(shù)詞及其用法6.___cavethatGeorgehasdiscoveredinhislifetimeisneartheAlps.A.Thehundredth B.ThehundredC.Hundredth D.Ahundredth7.Theheroofthestoryisanartistinhis____.A.thirtiethB.thirtyC.thirty'sD.thirties8.Ihavetowritea____compositioneveryotherweek.A.two-thousand-wordB.two-thousands-wordC.two-thousand-wordsD.two-thousands-wordsADA數(shù)詞及其用法

9.TheYellowRiveris___riverinChina.Hainanis____island.A.secondlongest/secondChina'slargestB.thesecondlongest/China'ssecondlargestC.secondthelongest/China'sthesecondlargestD.asecondlongest/theChina'ssecondlargest10.Paperproducedeveryyearis____theworld'sproductionofvehicles.A.thethreetimesweightofB.threetimestheweightofC.asthreetimesheavyasD.threetimesasheavierasBB數(shù)詞及其用法2.Theyreceived______oflettersabouttheirTVprograms.a.dozenb.dozenanddozen cscored.dozens3.Whoisthatman,______inthefrontrow?a.oneb.theone c.firstd.thefirst4.Wehaveproduced______thisyearaswedidin1993.a.asmuchcottontwice b.astwicemuchcottonc.muchastwicecotton d.twiceasmuchcotton5.Theearthisabout______asthemoon.a.asfiftytimebig b.fiftytimesasbigc.asbigfiftytime d.fiftyastimesbig數(shù)詞及其用法6.ThepopulationofmanyAlaskancitieshas______inthepastthreeyears.a.morethandoubled b.moredoubledthanc.muchthandoubled d.muchdoubledthan7.Themoonisabout_____indiameterasdiameterastheearth.a.one-threeaslarge b.onethreeaslargec.one-thirdaslarge d.onethirdaslarge8.Fivehundredyuanamonth_____enoughtoliveon.a.isb.are c.isbeingd.hasbeen9.______ofthebuildingswereruined.a.Threefourth b.Threefourc.Three-fourths d.Three-four10.Consult_____forquestionsaboutearthquakes.a.thesixindex b.indexsixc.sixthindex d.indexnumberingsix數(shù)詞及其用法11.Shewenttothecountryside______.a.inthemorningatnine/onJunefirst,1968b.onJunefirst,1968/inthemorningatninec.atnineinthemorning/onJunefirst,1968d.onJunefirst,1968/atnineinthemorning12.Three-fourthsofthesurfaceoftheearth_____coveredwithwater.a.areb.is c.wered.be13.Thismonththeproductionofstainlesssteelinoursteelworkshasincreased______2,000tons.a.withb.in c.on d.by14.Withtheminiaturizationofthestructuralcomponentstheweightoftheseelectricdeviceshasdecreased______30percent.a.asb.with c.in d.by15.TheOlympicGamesareheld______.a.every

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