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1、什么是数词？,表示数目多少或顺序多少的词叫数词，数词分为基数词和序数词。表示数目多少的数词叫基数词；表示顺序的数词叫序数词。 渭塘天天教育 Qq:276158535,基数词,one,two,three,four,five,six,seven,eight,seven,six,three,zero,nine,two,one,eight,four,five,numbers,seven,six,three,zero,nine,two,one,eight,four,five,100 a hundred, 1,000 a thousand,1,000,000 a million, 1,000,000,00
2、0 a billion.,从事物内容上分析，基数词用在下列情况。,1) 编号的事物用基数词。 Today we are going to study Lesson Five. 今天我们要学习第五课。 Please open your books at page ten. 请打开书，翻到十页。 We live in Room 101. 我们住在101房间。,2) 表示“年，月，日”时用基数词。 The accident took place in 1982. 这次事故发生在一九八二年。 I was born in Oct.11,1956. 我出生在一九五六年，十月，十一日。 You could
3、see many flowers in June. 六月份你可以看到好多花。,3) 表示“几点钟，几点过几分”用基数词。 Its three oclock. 现在是三点钟。 It is two to two. 现在是两点差两分。 We arrived in Beijing at five to seven. 我们七点差五分到达北京。,4) 用于加减乘除的数字用基数词。 One plus two is three. 一加二等于五。 Eight minus four is four. 八减四等于四。 Two times two is four. 二乘二等于四。 Ten divided by two
4、 is five. 十除以二等于五。,5) 表示大几倍或者小几倍用基数词。 This river is two times longer than that one. 这条河比那条河长两倍。 This box is five times less than that one. 这个盒子比那个盒子小五倍。 Five times six is thirty. 五乘以六得三十。,6) 表示百分数用基数词。 Thirty percent of them is water. 它们当中有30%的水。 Eighty percent of what he said is true. 他的话有80%是真实的。,
5、7) 表示分数时，分子数字用基数词, 但分母要用序数词, 如分子不是1，序数词要用复数形式。 One-fifth of the books are mine. 三分之一的书是我的。 Three-tenths of water is disappeared. 十分之三的水不见了。,8) 表示有小数的词用基数词。 5.5 five point five 12.135 twelve point one three five,Numbers are widely used.,Hello ， 86861873 -,Lets count!,1-10 one two three four five six
6、seven eight nine ten 11-19 eleven twelve thirteen forteen fifteen sixteen seventeen eighteen nineteen,Lets review,10,20,30,40,50,60,70,80,90,100,ten,thirty,forty,seventy,sixty,One hundred,fifty,ninety,twenty,eighty,Dragon,1-100,1,3,2,4,Look and Read,100 one hundred,1,000 one thousand,1,000,000 one m
7、illion,1,000,000,000 one billion,100 2,000 30,000 400,000 5,000,00060,000,000700,000,000 8,000,000,000 90,000,000,000 100,000,000,000,Can you read them ?,hundred,thousand,million,billion,onehundred onethousand tenthousand onehundredthousand onemillion tenmillion onehundredmillion onebillion tenbilli
8、on onehundredbillion tens/ hundreds/thousands/ millions of,一百 一千 一万 十万 一百万 一千 万 一亿 十亿 一百亿 一千亿 数十/百/千/百万,看谁译得快：,Step1:one hundred and twenty-three billion, Step2:four hundred and fifty-six million, Step3:seven hundred and eighty-nine thousand, Step4:one hundred and three,103,789,456,123,625 six hundr
9、ed and twenty-five 8,961 eight thousand, nine hundred and sixty-one 95,680 ninety-five thousand, six hundred and eighty,Look and Practice,Look and Practice,6,302,876 six million, three hundred and two thousand, eighty hundred and seventy-six 45,690,510,810 forty-five billion ,six hundred and ninety
10、million, five hundred and ten thousand ,eight hundred and ten,8,3,9,1,What is the largest / smallest 4-digit number?,9831,1389,Lets do a practice!,face to face number to number,序数词的含义 表示次序的数词叫序数词，是由基数词变化而来的。,序数词的变化,1 one -first 2 two-second 3 three-third 4 其余的序数词都是由基数词后加-th 变化而来的吗？,fifth,整十的序数词把 y 变
11、成 i加-eth,twenty-twentieth,Can you read?,1 thirty-thirtieth 2 forty-fortieth 3 fifty -fiftieth,序数词的定义,表示数目顺序的词用序数词。例如: first 第一，fifth 第五,序数词的构成,first 第一 second 第二 third 第三 fourth 第四 fifth 第五 sixth 第六 seventh 第七 eighth 第八 ninth 第九 tenth 第十 eleventh 第十一 twelfth 第十二 thirteenth 第十三 nineteenth,第十九 twentie
12、th 第二十 fortieth 第四十 fifty-first 第五十一 eight-third 第八十三 ninety-fourth 第九十四,1) 序数词119 除第一，第二，第三，第五，第八，第九，第十二变化不规则外，其余均由在基数词后加上-th。 2) 十位整数的序数词的构成方法是, 是将十位整数基数词的词尾y 变成 i 再加 -eth。,3) 几十几的序数词，只是把个位数变成序数词，十位数不变。 为了更简单地记忆，你只要记住下面这个基数词变序数词口诀就可以了： 1，2，3全都变，9少e，8少t，ve变f，ty变成tie，th最后加上去。,A:When is your birthday
13、?,B:My birthday is in .,Which day?（哪一天？） Its in June 2nd.,June the second,When is Teachers Day?,Its September10th.,When is National Day?,Its October 1st.,When is Independence Day? 美国独立日Its_.,July 4th,基数词变序数词歌 基变序，有规律： 词尾加上th（fourth，sixth） 一、二、三，特殊记； 结尾字母t，d，d（first，second，third）; 八减t，九去e （eighth，nin
14、th）; ve要用f替（fifth，twelfth）; ty将y变i； th前面有个e。 若是碰到几十几， 前用基来后用序。,one -first,two-second,three-third,four-fourth,five-fifth,six-sixth,seven-seventh,eight-eighth,nine-ninth,ten-tenth,序数词,twenty-twentieth,thirty-thirtieth,forty-fortieth,fifty-fiftieth,sixty-sixtieth,seventy-seventieth,eighty-eightieth,nin
15、ety-ninetieth,tenth,ninth,eighth,seventh,sixth,fifth,fourth,third,second,first,ordinal numbers,tenth,ninth,eighth,seventh,sixth,fifth,fourth,third,second,first,一、二、三，特殊记， 加th从4起， 八少“t”，九去“e”， “ve”要用“f”替，(five, twelve) 见“y”变成“i”和“e”，词尾加上“th”， (twenty,thirty,-ninety) 若是遇到几十几，只变个位就可以。,ordinal numbers(序数词 ),Can you write their ordinal numbers?,2,5,44,12,9,18,72,19,101,90,40,14,8,100,1000,December is the _ month of the year. Monday is the _ day of the week. English is spoken by most people as their _ language in the USA, Great Britain, Australian, and Canada. The Games of the _ Olympic in 2008 w
