VOCABULARY AND SPEAKING课件

英语第一册外研版,MODULE5VOCABULARYANDSPEAKING,英语中基数词、序数词、分数、小数和百分数的读法,1.基数词的读法：,A.先说“几十”，再说“几”，中间用连字符。如：2389,B.先说“几百”，再加and,再加末两位数（或末位数）。如：223416809,twenty-three,eighty-nine,twohundredandtwenty-three,fourhundredandsixteen,eighthundredandnine,C.1000以上的数先从后向前数，每三位数加一“,”（千分位）；第一个“,”号前为thousand;第二个“,”号前为million;第三个“,”号前为billion。如：1,0014,0009,743174,301750,000,000,onethousandandone,fourthousand,ninethousand,sevenhundredandforty-three,a(one)hundredandseventy-fourthousand,threehundredandone,sevenhundredandfiftymillion,CanyousaythefollowinginEnglishcorrectly?,1,0002,00012,000112,000796,000,onethousand,twothousand,twelvethousand,onehundredandtwelvethousand,sevenhundredandninety-sixthousand,988,766,688,ninehundredandeighty-eightmillion,sevenhundredandsixty-sixthousand,sixhundredandeighty-eight,2.序数词的读法,序数词一般以与之相应的基数词加词尾-th构成，如：tenth（第十），但下面这些基数词在变序数词时，有特别的地方。如：,A.onetwothreefiveeightninetwelve,first,second,third,fifth,eighth,ninth,twelfth,B.以-ty结尾的词，要先变-y为-i，再加-eth。如：twentyfortyC.以one,two,three,five,nine收尾的多位数词，要照第一条方法变。如：twenty-onetwenty-twothirty-fiveninety-nineahundredandfifty-three,twentieth,fortieth,twenty-first,twenty-second,thirty-fifth,ninety-ninth,ahundredandfifty-third,基数词表示分子，序数词表示分母，除了分子是“1”的情况外，序数词要用复数。如：2/37/95/12,one-fourth,two-thirds,seven-ninths,five-twelfths,twoandthree-fifths,thirtyandseven-eighths,3.分数的读法,2,3,5,30,7,8,一些特殊的表达法,a/onehalf,a/onequarter,threequarters,4.小数的读法,7.82.43.030.12514.397,sevenpointeight,twopointfour,threezeropointzerothree,zeropointonetwofive,fourteenpointthreenineseven,5.百分数的读法27%45%86%,twenty-sevenpercent,forty-fivepercent,eighty-sixpercent,Letshaveamatchtoseewhocansaythefollowingnumberscorrectlyandquickly.,765,847sevenhundredandsixty-fivethousand,eighthundredandforty-seven,Practice,978,876,675,467,ninehundredandseventy-eightbillion,eighthundredandseventy-sixmillion,sixhundredandseventy-fivethousand,fourhundredandsixty-seven,1,000,000,000,onebillion,32,000,000,000,thirty-twobillion,564,865,000,000,fivehundredandsixty-fourbillion,eighthundredandsixty-fivemillion,897,786,000,576eighthundredandninety-sevenbillion,sevenhundredandeighty-sixmillion,fivehundredandseventy-six786,087,670,756sevenhundredandeighty-sixbillion,eighty-sevenmillion,sixhundredandseventythousand,sevenhundredandf