?7.1000以上的数字,从后往前数每三位加一个逗号“,”第一个逗号前为千(thousand),第二个逗号前为百万(million),第三 个逗号前为billion(十亿)。英语中无“万”这个词,我们可以用“几十个千(thousand)”表示几万,“几百个千(thous and)”表示“几十万”。如:2,510=twothousandfivehundredandten;84,296=eig ht-fourthousandtwohundredandninety-six;274,350=twohundreda ndseventy-fourthousandthreehundredandfifty。一、基数词的构成?? 1.1—12的基数词是独立的单词,即:one,two,three,four,five,six,seven,eight,nin e,ten,eleven,twelve。???2.13—19的基数词以-teen结尾。如:fourteen,sevente en等,但13,15,18较特殊,13—thirteen15—fifteen18—eighteen。???3.20—9 0的整十位均以-ty结尾。如:sixty,ninety,但20,30,40,50,80较特殊,20—twenty30—thi rty40—forty50—fifty80—eighty。???4.十位数与个位数之间要加连字符号“-”,如:28—t wenty-eight,96—ninety-six。??5.百位和十位(若无十位则和个位)之间加and,如:148—oneh undredandforty-eight406—fourhundredandsix。??6.hundred(百) ,thousand(千),million(百万),billion(十亿)等前面即使有具体的数词,也不能在它们的后面加s。如:600 —sixhundred,8百万—eightmillion。?数词(numerals)1.基数词one 13thirteen31thirty-onetwo14fourteen 40fortythree15fifteen50fifty4 four16sixteen60sixty5five 17seventeen70seventysix18eighteen8 0eightyseven19nineteen90ninetyeight 20twenty100onehundrednine21twenty-o ne101onehundredandone10Ten22twenty-two200 twohundred11eleven23twenty-three12twelve30 thirty??序数词一般是以与之相应的基数词尾加-th构成,例如fourth,tenth,但以下的这些基数词变为序数 词时,有特别之处。1.one---first,?two---second,?three---third,fiv e---fifth,?nice---ninth,?twelve---twelfth2.以ty结尾的单词, 要先变y为i,在加-eth.例如:thirty---thirtieth,fifty---fiftieth3.以one ,two,three等结尾的多位数词,要将各位数变成序数词。例如:?twenty-one---twenty-fir st,?onehundredandone---onehundredandfirst?注意:序数词前常用定冠词 the,有时还可以用不定冠词a/an则表示“又一”的意思。????????例如:MrBrownhasase condcar.?布朗先生另外还有一辆车。Hehastriedasecond time.?他又尝试了一次。序数词first1steleventh11th eightieth80thsecond2ndtwelfth12th ninetieth90ththird3rdtwentieth20th hundredth100thfourth4thtwenty-first21 stfifth5ththirtieth30thsixth 6ththirty-first31stseventh7th fortieth40theighth8thfiftieth 50thninth9thsixtieth60thtenth10thseventieth70th |
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