数词 省赛获奖 详细版课件

1、第五讲 数词数词数词就是表示事物的数量和顺序的词，分基数词和序数词两种。 数 词 1. 基 数 词 2. 序 数 词一.基数词表示数量多少的词是基数词，如：one, two, three等。构成方法如下：1）从112分别由从one到twelve12个各不相同的词表示。 one two three four five six seven eight nine ten eleven twelve2）从1319均以后缀-teen结尾。 thirteen fourteen fifteen sixteen seventeen eighteen nineteen 3）从2090的整十数词均以后缀-ty结尾

2、。 twenty thirty forty fifty sixty seventy eighty ninety表示“几十几”时，个位和十位之间需加连字符，如twenty-one, thirty-two, forty-three等。0 0 0， 0 0 0，0 0 0，0 0 0 billion million thousand hundred4）数字的写法和读法：十位与个位之间要加连字符“-”；百位和十位之间要加and；三位数以上的数，从个位往前数，每三位数加一个逗号“，”，从后往前数的第一个逗号代表thousand,第二个逗号代表million,第三个逗号是billion，注意这几个词不能用

3、复数形式，后也不能加and。 1002,00030,000400,0005,000,00060,000,000700,000,0008,000,000,00090,000,000,000100,000,000,000Can you read them ?hundredthousandmillionbilliononehundredonethousandtenthousandonehundredthousandonemilliontenmilliononehundredmilliononebilliontenbilliononehundredbillion tens/ hundreds/thou

4、sands/ 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 three103789456123,5）表示具体、准确的数目时，hundred, thousand, million等数词后不能加-s, 如five hundr

5、ed, six thousand, seven million等。6）当hundred, thousand等数词与of连用，表示不具体、不准确的数目时，词尾须加-s。如： thousands of students, millions of trees.二.序数词表示顺序的的数词叫序数词，如 first，second，third等ordinal numbers tenthnintheighthseventhsixthfifthfourththirdsecondfirst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”

6、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 )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 will be held in the

7、 city of Beijing.Im hungry. Ive eaten three apples. Would you please give me a_ one?At the beginning of the _ century the worlds population has passed 6 billion.He got off this bus and got on a _ one. twelfth secondfirst twenty-ninth fourthtwenty-firstsecondPractice:三. 数词的用法（一）表示事物的编号基数词放到名词的后边,该名词一

8、般要大写；序数词放到名词的前面，加定冠词。第一课 Lesson 1/ the first lesson. Row 3/ the third row如果数字较长，应避免使用数词，而且读法也常简化Room 201 What time is it? six/six oclock four o five/ five past four seven fifteen/a quarter past seven nine twenty/ twenty past nine nine thirty/half past nine six forty/twenty to seven21391112Whats/ was

9、 the date?1990201019001918082020January 1st , 20031022February 14th ,1990March 12th, 2010September 22nd,1900November 23rd,2020December 25th,1808July1,1921October 1,1949August 1, 1927May, 1922When were they founded?PRCLeaguePLACCPThe -was founded on /in -（三）分数的表达方法表示分数时，分子用基数，分母用序数，分子大于1，分母用复数。分数修饰名词

10、时，后用of短语。如：1/3 one third of teachers 3/7 three sevenths of the boys1/2, 1/4分别用 a half和a quarter表示。（四）“基数词名词形容词”结构“基数词名词形容词”只能用来放到名词前作定语。如：She is a 3-year-old girl.They live in a 7-storey-high building.注：这种结构中名词不能用复数，同时只能作定语。用作表语时，不用连字符，名词有复数。如：Tony is 10 years old this year.Tony is a 10-year-old boy

11、.中考考什么?中考从以下几个方面来考查学生对数词的掌握情况： 1.基数词和序数词(2007乌鲁木齐)Dick, it is the _ time in _ days that youve made the same mistake.A. two, three B. second, three C. two, thirdD. second, third解题技巧 以此立意的试题要求考生能正确使用基数词和序数词：基数词用来表达事物的量；序数词用来表达事物的顺序。 本题的第一空表示顺序用序数词second；第二空用基数词three，答案为B。B2.分数（2006苏州）It is said that t

12、he gravity(引力) on Mars is only about _ of the gravity on earth.A. threeeighthsB. thirdeighthC. threeeightsD. thirdeight解题技巧 以此立意的试题考查考生能否正确使用分数：分子在前用基数，分母在后用序数。分子大于一，分母用复数，分子与分母之间可以用连字符连起来也可以不用连字符，如two thirds或two-thirds；当分数修饰名词作定语时，后要跟of，如：two thirds of students 三分之二的学生 本题的选项中只有A项正确。A3. hundred,thou

13、sand,million,billion等单位数词How many people will come to Beijing next year?Its hard to say, _ people, I think.A. million ofB. millions of C. three millions D. three millions of (2007芜湖)解题技巧 以此立意的试题考查考生能否正确使用hundred等单位数词。表示单位的数词用法分两种情况：1）当放在具体的数字后边，表示具体的“百、千、百万、十亿”时，不能用复数形式，可以直接修饰名词复数，如two thousand stud

14、ents；2）当表示大概的“几百、几千、几百万、几十亿”时，用“复数形式of”结构，前边不能用具体的数字，如：thousands of students。本题中只有B项正确。B2008年天津市 The also wrote_of beautiful pieces of music for the orchestra. A. hundredB. six hundred C. a hundredD. hundredsD历届中考题( )1. How many people will come to Beijing for the Olympic Games in 2008 ? - Its hard to say . _ people ,I think .(2005) A. Thousand of B. Thousands of C. Two thousands of D. Two thousand of( )2. There are forty-six students in our class . _ of them are girls. (2007)Two third B. Second third C. Two thirds( )3. _