numerals數(shù)詞基數(shù)詞oneeleventwotwelvetwentyhundred百threethirteenthirtyThousand千fourfourteenfortytenthousand萬fivefifteenfiftyhundredthousand十萬sixsixteensixtymillion百萬sevenseventeenseventybillion十億eighteighteeneightytrillion萬億ninenineteenninetyten基數(shù)詞的寫法13-19:teen,thirteen,nineteen20-90,ty:twenty,ninety21-99,:twenty-one,eighty-eight百：Onehundredandfive千：2010twothousandandten萬：10,000tenthousand,100,000onehundredthousand百萬：1，000，000onemillion一億：100，000，000onehundredmillion十億：1,000,000,000onebillion序數(shù)詞firsteleventhsecondtwelfthtwentieththirdthirteenthhundredthfourthfourteenththousandthfifthfifteenthmillionthsixthsixteenthbillionseventhseventeenthtrillioneightheighteenthninthnineteenthtenth分?jǐn)?shù)分子:基數(shù)分母:序數(shù)(當(dāng)分子大于一時,有復(fù)數(shù)形式)1/3:onethird2/3:twothirds32/3:twoandtwothirds1/2:(one/a)half?:onefourth;aquarter?:threequarters小數(shù)1.5:

one

point

five

0.2:

zero

point

two/

point

two

6.03

six

point

o

three百分?jǐn)?shù)

33%:

thirty-three

percent

0.72%

zero

point

seven

two

percent時間表達1時刻Igetupatsixo’clock.Wewillfinishtheworkathalfpastten.Itbegantorainattwentytotwo.3.50:threefifty3.15:threefifteen,aquarterpastthree3.45:threeforty-five,aquartertofouram上午pm下午2日期（美）月+日（序數(shù)詞），年（英）日（序數(shù)詞）+月，年June22nd,201422ndJune,2014the日期（序數(shù)詞）of月the22ndofJune,20143年代20世紀(jì)90年代（初期/中期/晚期）inthe(early/mid-/late)1990s世紀(jì)inthe21stCentury千年millenium4年齡…yearsold（表語）Heiselevenyearsold.他十一歲。-year-old（定語）aneleven-year-oldboy十一歲的男孩attheageof在幾歲時Hebegantosellnewspapersattheageof14.他在十四歲時開始賣報紙。inone’searly/mid-/latetwenties二十歲出頭/五六/七八Mostwomengetmarriedintheir20s.多數(shù)女人在二十多歲時結(jié)婚?；鶖?shù)詞不管多大，本身都沒有復(fù)數(shù)，如Therewereabouttenthousandpeopletakingintothestreet（游行）today.a-hundred-year-oldman但一旦數(shù)詞轉(zhuǎn)化為名詞，即數(shù)詞+of其他（復(fù)數(shù)）名詞，表述“成百上千“等，用復(fù)數(shù)形式,如tens,dozens（成打）,scores（二十）,hundreds,thousands,millionsTherewereseveralthousandsofpeopletakingintothestreet（游行）today.倍數(shù)同等asmuch/manyas;thesameas;equal(v.)Heearnsasmuchashiswife.他掙的錢和妻子一樣多。

Hissalary（工資）isthesameashiswife’s.Hissalaryequalshiswife’s.

兩倍twice/double(v.)Heearnstwiceasmuchashiswife.Hissalarydoubleshiswife’s.三倍threetimes/triple(v.)Heearnsthreetimesasmuchashiswife.Hissalarytripleshiswife’s.

次數(shù)Once一次twice兩次threetimes三次fourtimes四次算術(shù)加and/plus:3+4=7:threeplus/andfourisseven.減minus9-1=8:nineminusoneiseight.乘multiply5×8=40:fiveeightsareforty.除:dividedby…equal/is10÷5=2:tendividedbytwoisfive.常用的數(shù)字前綴semi-:半

semi-final半決賽uni-:一

uniform統(tǒng)一的服裝，制服；unicorn

獨角獸mono-:一

monologue

獨白bi-:二

bilingual

雙語的；bicycle

單車tri-:三

tricycle

三輪車；triangle三角形

centi-:一百/百分之一

cent一分錢；century世紀(jì)（一百年）centimeter厘米milli:千/千分之一

millimeter千米;millilitre毫升kilo-:千

kilogram公斤（千克）；kilometer公里（千米）multi-:多

multinational多國的;multimedia多媒體的練習(xí)1.Thereare____employeesandseveralemployersinthecompany.A.athousandofB.thousandC.thousandsofD.thousands2.Wewillhavea____holidaynextmonth.A.5-daysB.5-day’sC.5daysD.5-day3.Thisisagoodbook.Ihavereaditanddecidetoreadit____.A.thesecondtimeB.asecondtimeC.twotimeD.twotimes4.About____oftheteachersinourschool____underthirty.A.twothirds;areB.second-two;isC.twofifths;areD.threefifths;is5.Hermotheris____.A.inthefiftiesB.inthefiftyC.inherfiftiesD.inherfifty6.Whenwereyouborn?Iwasborn____.A.onJuly3rd,1973B.inJuly3,1973C.onJuly3,1973D.inJuly3rd,19737.Whattimeisitnow?____.A.tentonine.B.fiftypasteight.C.eightpastfiftyD.fiftyeight8.ThesecondWorldWarbrokeoutin____.A.1930’sB.the1930sC.the1930’sD.1930s9.Theweightofthemooniso