第三課時數(shù)詞第二章語法精講考點分類考點1數(shù)詞的定義與分類數(shù)詞是指表示數(shù)目多少或順序先后的詞。表示數(shù)目多少的數(shù)詞叫基數(shù)詞,如one,five,ten,thirty,sixty-five等;表示順序先后的數(shù)詞叫序數(shù)詞,如first,sixth,tenth,twenty-first等。數(shù)詞在句中可作主語、賓語、表語、定語、同位語等。

①InChinathereisacycleof

twelve

?(twelfth)years,eachwithadifferentanimal.②Theyhaveplantedaboutfive

thousand

?(千)treesinandaroundthetowninthepastfewyears.

twelve

thousand

考點2基數(shù)詞1.英語中沒有“萬”這個讀數(shù)單位,要表示漢語中的“萬”,需借用thousand一詞,如“一萬”用tenthousand表示,“十萬”用onehundredthousand表示。2.若表示具體的數(shù)目,hundred,thousand,million,billion通常不帶復(fù)數(shù)詞尾-s;但若表示數(shù)百、數(shù)千、數(shù)百萬這樣的泛指,則用復(fù)數(shù),且與of連用。eg:Abouttwothousandpeoplediedintheearthquake.大約有2000人在地震中喪生。Thousandsofpeoplegototheseasideeveryyear.每年成千上萬的人到海邊去。3.表示整十的基數(shù)詞的復(fù)數(shù)形式可以表示人的大約歲數(shù)。eg:Heisinhisearlytwenties.他才二十出頭。

（

C

）①Morethannine

?studentsaredoingsportsnow.

A.hundredsB.hundredofC.hundredD.hundredsof（

C

）②Yesterday

?peoplecametothetowntowatchthecarrace.A.hundredsB.hundredC.hundreds

ofD.hundredofCC考點3序數(shù)詞1.許多序數(shù)詞是由相應(yīng)的基數(shù)詞后加詞尾-th構(gòu)成的,如four—fourth,six—sixth,ten—tenth,sixteen—sixteenth。

不規(guī)則變化:one—first

two—secondthree—third

five—fiftheight—eighth

nine—ninthtwelve—twelfth2.twentieth,thirtieth,fortieth等表示整十的序數(shù)詞,由相應(yīng)的基數(shù)詞將詞尾的y變?yōu)閕e,再加-th構(gòu)成。3.first,second,third通?？煽s寫為1st,2nd,3rd。以th結(jié)尾的序數(shù)詞可縮寫為“基數(shù)詞＋th”,如4th,5th,9th,11th,60th等。4.非整十的多位數(shù)變序數(shù)詞時只需將個位數(shù)變成序數(shù)詞即可,如twenty-first,thirty-sixth,ninety-ninth,threehundredandsixty-fifth等。5.hundred,thousand,million的序數(shù)詞為hundredth,thousandth,millionth。6.序數(shù)詞主要用作定語,前面通常要加定冠詞,但表示考試或比賽等的名次時,通?？墒÷云淝暗亩ü谠~。eg:Myroomisonthesecondfloorandhisisonthethird.我的房間在二樓,他的房間在三樓。He

was

third

in

the

exam.他考試得了第三名。

（

C

）①Todayistheboy’s

?birthday.Heis12yearsold.A.twelveB.twelvethC.twelfthD.thetwelfth②Augustisthe

eighth

?(eight)monthofayear.Ceighth

考點4數(shù)詞的其他用法1.分數(shù)分數(shù)由基數(shù)詞和序數(shù)詞構(gòu)成。分子用基數(shù)詞,分母用序數(shù)詞。分子是1時,分母用單數(shù)形式;分子大于1時,分母用復(fù)數(shù)形式。eg:onehalf/ahalf1/2onefourth＝one/aquarter1/4threequarters＝threefourths3/42.小數(shù)整數(shù)與小數(shù)之間用小數(shù)點隔開。讀小數(shù)時,每位數(shù)字(特別是小數(shù)點后面的)要單獨讀出。小數(shù)點讀作point,零讀作zero。如果整數(shù)是零,也可不讀出。eg:0.1讀作(zero)pointone2.25讀作twopointtwofive

與小數(shù)連用的名詞的數(shù),當(dāng)整數(shù)是零時,名詞用單數(shù)形式,其他情況名詞用復(fù)數(shù)形式。eg:0.27metre0.27米1.26

metres

1.26米3.百分數(shù)百分號讀作percent。eg:5%讀作fivepercent4.時刻表達法時刻有兩種表達法:(1)先說分鐘,后說鐘點。幾點過幾分,分鐘不超過三十時用past;差幾分幾點,差的分鐘數(shù)不超過三十時用to。eg:five

past

seven

7:05twenty-fivetofive4:35(2)先說鐘點,后說分鐘。eg:sixthirty6:305.half的用法(1)“halfa(an)＋名詞”或“ahalf＋名詞”表示“一半……”。eg:half

a

kilo/a

half

kilo

500克half

an

hour

半小時(2)“一個半小時”的表達法:one

hour

and

a

half/one

and

a

half

hours。6.數(shù)詞與其他詞的連用(1)當(dāng)序數(shù)詞前有a/an修飾時,表示在原來的基礎(chǔ)上“又一,再一”。eg:WouldyouliketocometoBeijingasecondtime?你愿意再次來北京嗎?(2)“基數(shù)詞＋單數(shù)名詞＋形容詞”(兩兩之間用連字符連接)在句中作定語修飾名詞。eg:Sheisafive-year-oldChinesegirl.她是一個5歲的中國女孩。

①加油,孩子。我們已經(jīng)做了三分之一的工作了。Comeon,baby.Wehavealreadydone

one

?

third

?ofthework.

（

B

）②—Whichisthebiggestnumberofthefour?—

?.

A.OnethirdB.Two

thirdsC.AhalfD.Aquarterone

third

B備考演練一、單項選擇（

A

）1.(2022·黑龍江牡丹江)TheGreatWallisasymbolofChina.Itattracts

travellersfromallovertheworldtovisitit.A.millions

ofB.tenmillionofC.tenmillionsA（

C

）2.(2022·黑龍江齊齊哈爾)Inourcitymuseum,therearemanyoldthingsfromtwo

?yearsagoonshow.A.thousandsB.thousandsofC.thousandC（

C

）3.(2022·黑龍江哈爾濱)Hereisasurveyabouthowtobeagoodlearneramong400students.Accordingtotheformbelow,

?studentshavechosen“Learningfrommistakes”astheirkeywords.KeywordsMakingplansTakingnotesAskingquestionsLearningfrommistakesPercentage(百分比)20%10%30%?A.80B.120C.160C（

A

）4.(2022·湖南郴州)About

?ofmyclassmateshelptheirparentsdohouseworkonweekends.A.two

fifthsB.secondfiveC.secondfifths（

B

）5.(2022·白銀)Iwaitedaquarterofanhourandwenthome.A.10minutesB.15

minutesC.30minutesD.45minutes（

B

）6.ThisSaturdayismy

?birthday.

A.fourteenB.fourteenthC.fortyD.thefortiethABB（

D

）7.(2022·江蘇宿遷)—Peopleinourtownplanted

?treesonTreePlantingDay.—Goodjob!Everyonecandosomethingtomakeourtowngreener.A.hundredB.hundredofC.hundredsD.hundreds

of（

B

）8.—Wouldyouliketohave

?apples?

—No,thankyou.I’vehadenough.A.othertwoB.another

twoC.moretwoD.twoothersDB（

D

）9.Pleaseturntopage

?andlookatthe

?pictureinthisunit.

A.twentieth;oneB.twenty;oneC.twentieth;firstD.twenty;first（

B

）10.—Excuseme,sir.Here’sapackageforLinTao.Whichroomdoeshelivein?—

?.

A.308RoomB.Room

308C.TheRoom308D.The308RoomDB二、用所給詞的適當(dāng)形式填空1.(2022·廣西賀州改編)Octoberisthe

tenth

?(ten)monthofayear.

2.(2022·黑龍江龍東地區(qū))You’dbetterbrushyourteethatleast

twice

?(two)aday.3.(2022·江蘇泰州)Beijing,thecapitalofChina,isworld’s

first

?(one