初中英語語法講解數(shù)詞的用法

數(shù)詞熱身練習(xí)1._______tresswereplantedonthemountainlastyear.

A.ThousandsofB.ThousandofC.FivethousandofD.Fivethousands.2．______ofthestudentsaregirlsinourclass．

A．Twothree

B．TwothreesC．Twothirds

D．Secondthree3.Whenwasheborn?hewasbornon________.

A.secondofOctoberB.theOctoberthreeC.OctoberthesecondD.threeofOctober數(shù)詞的構(gòu)成基數(shù)詞的構(gòu)成1）1－12,獨立成詞。

onetwothreefourfivesixseveneightnineteneleventwelve2）13--19,由3－9+teen構(gòu)成。

14–fourteen16--sixteen17--seventeen19—nineteen

特殊拼寫:13–thirteen15--fifteen18—eighteen

3）20－90,以-ty結(jié)尾。

20—twenty30thirty40—forty50—fifty80eighty

60sixty70seventy90—ninety

4）21－99，兩位數(shù)，十位與個位之間有“－”。

21twenty—one55fifty—five99ninety—nine5）101—999，三位數(shù)，百位與十位/個位之間加and。

101onehundredandone840eighthundredandforty693sixhundredandninety-three

29,43150076,,thousandhundredmillionbillionand6)1，000以上數(shù)目,從右向左每三位用“，”分開,分別讀為thousand,million,billion基數(shù)詞的構(gòu)成1.—Ifa=3,b=4,what’stheanswertotheproblem,a+2ab+1=?—theansweris___.A.twentyeightB.twenty-eighthC.twenty-eight2.Inourschoolseveral__studentsareabletosearchtheInternet.A.hundredofB.hundredsofC.hundred3.Many__sheepwerekilledintheaccident.A.thousandsofB.thousandC.thousands4.Thereareovernine__workersinthefactory,but__ofyoungpeoplehopetoworkinit.A.hundred;hundredsB.hundreds;hundredsC.hundreds;hundred序數(shù)詞的構(gòu)成1)1－3,first,second,third。2)4－19,相應(yīng)基數(shù)詞+th,

特殊拼寫:fifth,eighth,ninth,twelfth。3)20－90,y變成ie+th,如twentieth。4)21－99,只把個位的基數(shù)詞變成序數(shù)詞如twenty-first。5)序數(shù)詞縮寫數(shù)字＋最后兩字母

如1st,2nd,3rd,4th…基變序,有規(guī)律,一、二、三，特殊記，面目全非要注意，加th從4起，八少“t”，九去“e”，“ve”要用“f”替，(five,twelve)見“y”變成“i”和“e”，詞尾加上“th”，(twenty,thirty,……ninety)若是遇到幾十幾，只變個位就可以。序數(shù)詞縮寫記清楚,數(shù)字后跟兩字母。(序數(shù)詞構(gòu)成規(guī)律)基數(shù)詞的用法1、表示具體數(shù)目,hundred,thousand,million不用復(fù)數(shù)

表示不確定數(shù)目,用復(fù)數(shù)。即hundredsof(數(shù)百),thousands

of(數(shù)千),millionsof(數(shù)百萬)+名詞復(fù)數(shù),

可以用many/several修飾，但不能與具體數(shù)目連用。

1)Ourcountryhasapopulationof1,300million

people.2)Therearethreethousandstudentsinourschool.3)Afterthewar,thousandsofpeoplebecamehomeless.2、“幾十”的復(fù)數(shù)形式可以表示：

在某人幾十歲時in+one’s+整十基

數(shù)詞復(fù)數(shù)年代in+the+數(shù)詞復(fù)數(shù)

1)Hediedinhisforties．四十多歲

2)Inthenineties,mostpeoplegotoworkbybike.90年代3、“基數(shù)詞+名詞”的合成形容詞作定語，中間有連字符“－”,當(dāng)中的名詞用單數(shù)。

a3–year–oldgirlaseven-dayholiday

4、表計量--“基數(shù)詞+度量單位+形容詞”

Theclassroomis7meterslong,6meterswideand3metershigh.1.

Thewinneris___.Heisan___boy.A.eight-year-old;eightyearsoldB.eightyearsold;eight-year-oldC.eight-yearsold;eight-year-old2.HecametoChina____.A.attheageof20B.whenheis20C.atageof20年齡3.Hegraduatedin__of__century.A.thesixtieth;twentyB.sixty;thetwentiethC.thesixties;thetwentieth4.Hegottheprize__.A.inhisfiftiesB.infiftiesC.inhisfifty

5、表示時刻(介詞用at)1)順讀法先時后分,“幾點幾分”

9:30ninethirty6:21sixtwenty-one

3)

15分鐘：aquarter30分鐘：ahalf

9:15aquarterpastnine12:30halfpasttwelve

表示“整點”時，在基數(shù)詞后加o’clock;

9:00o’clock

2)逆讀法先分后時

表示“幾點過幾分”，半小時以內(nèi)，介詞用past

分鐘數(shù)+past+鐘點數(shù)

10:10tenpastten8:20twentypasteight表示“幾點差幾分”，半小時以上，介詞用to

60減原分鐘+to+(下一個)鐘點數(shù)

9:50tentoten7:40twentytoeight(1)序數(shù)詞作定語，前面要加the；

Thefirsttruckiscarryingafoodbasket．

Johnlivesonthefifteenthfloor．

SheismyfirstEnglishteacher.(2)有時加a/an，“再一”，“又一”的意思We‘llhavetodoitasecondtime．ShallIaskhimathirdtime？

WhenIsatdown，afourthmanrosetospeak．Theyhadasecondchildin1988序數(shù)詞的用法編號表示法編號在前，名詞在后，用序數(shù)詞，前面有the編號在后，名詞在前，用基數(shù)詞，注意首字母大寫房間號碼和電話號碼要一個一個分別讀TheFirstLesson（在句子中不大寫）LessonOnethethirty-secondpagePage32/PageThirty-twoRoom305BusNo.12=theNo.12bus第一課第32頁第305房間第12路公共汽車15分子基數(shù)詞分母序數(shù)詞onefifth27分子﹥1分母+stwosevenths14分子a分母quarteraquarter34threequarters12ahalf13three

andonethird3基數(shù)詞+and+分?jǐn)?shù)分?jǐn)?shù)百分?jǐn)?shù)80%基數(shù)詞+percenteightypercenthalf/(百)分?jǐn)?shù)+of+可數(shù)名詞復(fù)數(shù)謂語動詞用復(fù)數(shù)half/(百)分?jǐn)?shù)+of+不可數(shù)名詞謂語動詞用單數(shù)3.78threepointseveneightDiscount，off用于表示“打折”打六折40%offa40%discount1.

__ofthestudents__boysinClassA.Twothree;areB.Twothirds;areC.Twothirds;is2.

__ofhermoney__spentonclothes.A.Twothree;areB.Twothirds;isC.Twothird;is3.__theteachersinourschoolisaboutonehundred,and__ofthemarewomenteachers.A.Thenumberof;twothirdB.Thenumberof;twothirdsC.Anumberof;twothirds一個半小時兩個半小時twoandahalfhours=twohours

andahalfoneandahalfhours=onehourandahalf半的表示法1.

Theboyalwaysstaystherefor__.A.oneandhalfhourB.oneandahalfhourC.oneandahalfhours2.

Theoldmandrank__beer.A.twobottlesandahalfB.twoandahalfbottleC.twobottleandahalf1999nineteenninety-ninetwothousandandeight1949年10月1日讀作:

October(the)first,nineteenforty-nine(月-日，年)thefirstofOctober,nineteenforty-nine（日-月，年）寫作:October1st,1999(日用縮寫，月-日-年)

October1,1999(日用數(shù)字)

1stOctober,1999日-月，年年份、日期表達法年用基數(shù)詞表示,兩位一讀,介詞用in日用序數(shù)詞表示,介詞用on

1.Theaccidenthappenedon___.A.April5,2001B.2001,April5C.April2001,52.Iwasborn___.A.inMarch8,1993B.onJuly9,1994C.onMay,199520世紀(jì)90年代inthe1990s數(shù)詞的表示法—

年代世紀(jì)inthenineteennineties表示“在…世紀(jì)”,用序數(shù)詞。在20世紀(jì)寫作：in

20thcentury

讀作：inthetwentiethcentury1.Therewillbemorechancesin__centurythanin__century.A.twenty-one,twentyB.twenty-first,twentiethC.thetwenty-first,thetwentieth2.Thecitychangedalot___.A.in1980sB.inthe1980sC.inthe1980一倍once，兩倍twice，三倍threetimes(三倍或以上基數(shù)詞＋times)數(shù)詞的表示法—

倍數(shù)

Thisboxisfivetimes

asbigasthatone.=Thisboxisfourtimesbigger

thanthatone.①

A+be+倍數(shù)

+as+adj.原+as+B.A是B的…倍…②

C+be+倍數(shù)

+adj.比+than+D.C比D…

…倍1.

Thisbuildingis__thatbuilding.A.threetimeastallasB.twicetallerthanC.threetimesastalleras2.

我的箱子比你的重六倍!Myboxis____________________yours.

sixtimesheavierthanseventimesasheavyas6+5＝11Sixplusfiveiseleven或Sixandfiveiseleven.11-6＝5Elevenminussixisfive.

4×5＝20Fourmultipliedbyfiveistwenty.或Fourtimesfiveistwenty.20÷4＝5Twentydividedbyfourisfive.

加減乘除式的表達方法

選擇填空。

1．Marchis____monthofayear．

A．a(chǎn)threeB．thethirdC．a(chǎn)third

2．Wewillhaveameetingat8:05____．

A．fivetoeightB．eightfiveC．eightofive

3．Eightpluseightis____.

A．sixteenB．sixty-fourC．one

4．Heisan____boy．

A．eightyearsB．eight-year-old

C．eight-years-old

5．Wewillhavea___walk．

A．tenminutesB．tenminutes'

C．ten-minutesB．thethirdC．eightofiveA．sixteenB．eight-year-oldB．tenminutes'6．Thewallis____.

A．fourmeterslongB．fourmeterlongC．four-meterlong7．What'sthedatetoday?It's___．

A．MarchtheeightB．Marcheighth

C．eight，March

8．Ithappenedinthe1040's．

A．inthefortiesoftheeleventhcentury．