專題19 數(shù)詞的表達(dá) 課件1 中考英語語法復(fù)習(xí)

數(shù)詞的表達(dá)1

數(shù)字分?jǐn)?shù)小數(shù)百分?jǐn)?shù)編號(hào)初中英語語法課件英英語語堂堂課課數(shù)字分?jǐn)?shù)小數(shù)百分?jǐn)?shù)目錄編號(hào)PARTONE數(shù)字的表達(dá)

基數(shù)詞序數(shù)詞

數(shù)詞1-100

one,two,three,four,five,six,seven,eight,nine,ten，eleven,twelve,thirteen,fourteen,fifteen,sixteen,

seventeen,eighteen,nineteen，twenty,thirty,forty,fifty,sixty,seventy,eighty,ninety，onehundredfirst1st，second2nd，third3rd，fourth，fifth，sixth，seventh，eighth，

ninth，tenth，eleventh，twelfth，thirteenth，fourteenth，fifteenth，sixteenth，seventeenth，eighteenth，nineteenth，twentieth，thirtieth，

fortieth，fiftieth，sixtieth，seventieth，eightieth，ninetieth基數(shù)詞記憶口訣：20、30至90,整十之后+ty;要想表達(dá)“幾十幾”,中間“-”莫忘記;“onehundred”是“一百”基數(shù)詞不難記,找清規(guī)律很容易;12以內(nèi)詞各異,13一直到19,后加+teen莫忘記;序數(shù)詞記憶口訣：ve要用f替;逢十改y為ie,后跟th莫忘記;若想表示第幾十幾只變個(gè)位就可以基變序,有規(guī)律,末尾加上th。1、2、3特殊記,詞尾字母t,d,d;八去t,九去e,這些數(shù)字記心間！數(shù)詞在句中都可以作主語、賓語、表語、定語和狀語。Three

willbeenoughforus.

三個(gè)對(duì)我們來說就足夠了。Fourappliedforthisjob,butweonlyneedone.四個(gè)人申請(qǐng)這工作，但我們僅需一人。I’mtwentywhilemybrotherissixteen.

我20歲，我弟弟16歲。Wehave

35

studentsinourclass.我們學(xué)校有35名學(xué)生?；鶖?shù)詞作主語基數(shù)詞作主語基數(shù)詞作賓語基數(shù)詞作表語基數(shù)詞作表語基數(shù)詞作定語基數(shù)詞表示數(shù)量的多少The

secondiswhatIreallyneed.第二個(gè)是我真正需要的。IgotathirdinEnglish.我英語得到了第三名。Iwillbethefirsttosupportyou.我將是第一個(gè)支持你的人。I’lltryasecondtime.

我還要試一次。Shecamesecondintherace.

她在賽跑中得了第二名。序數(shù)詞表示數(shù)量的順序或位置序數(shù)詞作主語序數(shù)詞作賓語序數(shù)詞作表語序數(shù)詞作定語序數(shù)詞作狀語數(shù)詞在句中都可以作主語、賓語、表語、定語和狀語。PARTTWO分?jǐn)?shù)的表達(dá)一般情況：表示分?jǐn)?shù)時(shí)，分子須用基數(shù)詞，分母用序數(shù)詞。分子如是1以上，表示分母的序數(shù)詞須用復(fù)數(shù)形式。1/3a(one)third2/3twothirds3/5threefifthsOnefifths

ofthestudentspassedtheexam.

1/5的學(xué)生通過了考試。NowadaystwothirdsofbusinesslettersarewritteninEnglish.現(xiàn)如今2/3的商務(wù)信函是用英語寫的。Onehalfofthecakeisgone.蛋糕的一半已經(jīng)沒了。Iateonequarterofthepizza.我吃掉了披薩的四分之一。Hedrankthreeandaquarterbottlesofwater.他喝了三又四分之一瓶水。特殊情況：1/2onehalf/ahalf(不讀onesecond)1/4a(one)quarter或a(one)fourth2twoandthree-quarters43PARTTHREE小數(shù)的表達(dá)小數(shù)點(diǎn)讀作point，小數(shù)點(diǎn)前的數(shù)與基數(shù)詞的讀法一致，小數(shù)點(diǎn)后的數(shù)字一一讀出。0.08:zeropointzeroeight0.76:zeropointsevensix不能讀作zeropointseventy-six39.45:threeninepointfourfiveThirty-ninepointfourfive702.06：sevenhundredandtwopointosix小數(shù)與分?jǐn)?shù)的轉(zhuǎn)換?（常用于日常交流）0.5isequaltoone-half.0.5等于二分之一。0.75canbewrittenasthree-quarters.0.75可以寫成四分之三。0.08isequaltotwo-twentyfifth.PARTFOUR百分?jǐn)?shù)的表達(dá)百分?jǐn)?shù)用基數(shù)詞加百分號(hào)表示，百分號(hào)讀作percent。60%:sixtypercent

27%:twenty-sevenpercentbookistenpercentoff.這本書打九折。Fortypercentofthewaterhasbeenpolluted.40%的水已經(jīng)被污染。Aboutthirty-percentofthepopulationisunder18yearsold.大約30%的人口在18歲以下。ThesalesinSeptemberweretwenty-fivepercenthigherthanthoseinJuly.七月的銷售額比六月高出25%PARTFIVE編號(hào)的表達(dá)編號(hào)可用序數(shù)詞或基數(shù)詞表示，序數(shù)詞位于名詞之前，并加定冠詞；基數(shù)詞位于名詞之后，名詞首字母大寫，若基數(shù)詞是單詞也需要大寫首字母。一般情況下，用基數(shù)詞的情況較為常見。823房間:Room823或theNo.823Room第297頁:Page297或the297thpage第5課:LessonFive或thefifthlesson電話號(hào)碼el:onefourthreedoublezerofivenineseveneightninesix1．Iliveonthe___floorandmyclassmateLucylives____floorsaboveme.A．ninth;two B．nineth;two C．ninth;second D．nineth;secondpracticeA2．—We’llbebackforourschool’s____anniversaryceremony.—Isee.Thatmeansyou’llhaveaget—togetherwithyourclassmatesin____years.A．fifteen;seven B．fifteenth;seven C．fifteen;seventh D．fifteenth;seventhpracticeB3．Sixtypercentoftheteachers_______nowlivingaroundXinjiekou.A．is B．a(chǎn)re C．has D．havepracticeB4．About________oftheearth________coveredwithwater,butwehavelessandlessfreshwater.A．three-fourth;are B．three-fourt