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1、英语第一册英语第一册 外研版外研版顶效开发区中学顶效开发区中学周兴梅周兴梅MODULE 5MODULE 5VOCABULARY VOCABULARY AND SPEAKINGAND SPEAKING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：基数词的读法：A. 先说先说“几十几十”， 再说再说“几几”，中间，中间用连字符。如：用连字符。如：23 89B. 先说先说“几百几百”， 再加再加and, ,再加末两位数再加末两位数（或末位数）。如：（或末位数）。如：223 416 809 twenty-three eighty-ninetwo hundred and twenty
2、-threefour hundred and sixteeneight hundred and nineC. 1000以上的数先从后向前数，每三位数加以上的数先从后向前数，每三位数加一一“,”（千分位）；第一个（千分位）；第一个“,”号前为号前为thousand; 第二个第二个“,”号前为号前为million; 第三个第三个“,”号前为号前为billion。如：。如：1,001 4,000 9,743 174,301750,000,000 one thousand and onefour thousandnine thousand, seven hundred and forty-threea
3、 (one) hundred and seventy-four thousand, three hundred and oneseven hundred and fifty millionCan you say the following in English correctly?1,000 2,000 12,000 112,000796,000one thousandtwo thousandtwelve thousandone hundred and twelve thousandseven hundred and ninety-six thousand988,766,688nine hun
4、dred and eighty-eight million, seven hundred and sixty-six thousand, six hundred and eighty-eight2. 序数词的读法序数词的读法序数词一般以与之相应的基数词加词序数词一般以与之相应的基数词加词尾尾-th构成，如：构成，如：tenth（第十），但下（第十），但下面这些基数词在变序数词时，面这些基数词在变序数词时， 有特别有特别的地方。如：的地方。如：A. one two three five eight nine twelvefirstsecondthirdfiftheighthninthtwelft
5、hB. 以以-ty结尾的词，要先变结尾的词，要先变-y为为-i，再加，再加-eth。如：如：twenty fortyC. 以以one, two, three, five, nine收尾的多位数词，收尾的多位数词，要照第一条方法变。如：要照第一条方法变。如：twenty-one twenty-two thirty-five ninety-ninea hundred and fifty-three twentiethfortiethtwenty-firsttwenty-secondthirty-fifthninety-nintha hundred and fifty-third基数词表示分子，序数
6、词表示分母，基数词表示分子，序数词表示分母，除了分子是除了分子是“1”的情况外，序数词要的情况外，序数词要用复数。如：用复数。如： 2/3 7/9 5/12 one-fourthtwo-thirdsseven-ninthsfive-twelfthstwo and three-fifthsthirty and seven-eighths3. 分数的读法分数的读法2353078一些特殊的表达法一些特殊的表达法 a / one halfa / one quarterthree quarters4. 小数的读法小数的读法7.8 2.4 3.03 0.125 14.397 seven point eig
7、httwo point fourthree zero point zero threezero point one two fivefourteen point three nine seven5. 百分数的读法百分数的读法27% 45% 86% twenty-seven percent forty-five percent eighty-six percentLets have a match to see who can say the following numbers correctly and quickly.765,847 seven hundred and sixty-five
8、thousand, eight hundred and forty-sevenPractice978,876,675,467nine hundred and seventy-eight billion, eight hundred and seventy-six million, six hundred and seventy-five thousand, four hundred and sixty-seven 1,000,000,000 one billion32,000,000,000 thirty-two billion564,865,000,000five hundred and s
9、ixty-four billion, eight hundred and sixty-five million897,786,000,576 eight hundred and ninety-seven billion, seven hundred and eighty-six million, five hundred and seventy-six 786,087,670,756 seven hundred and eighty-six billion, eighty-seven million, six hundred and seventy thousand, seven hundred and fifty-sixNow lets say: 15% 45%Practice fifteen percentforty percentFinish Exercises1,4,9 on pages42,43,93Homework
