七年级英语下册Unit1Dreamhomes课件新版牛津版.pptx
Introduce,How old are you?How many family members are there in your family?What is your favourite number?What is your telephone number?,Words,zero zr num.零 eg：The figure 100 has two zeros in it.数字100有两个零。The teacher put a zero on his paper.老师在他的试卷上打了个零分。小练习：翻译句子。这次考试他得了零分。_.,He got a zero in this examination.,Words,hundredhndrd num.百 hundreds of许许多多的；成百上千的 eg：There are more than five hundred people on the playground.运动场上有五百多人。The railway traverses hundreds of miles of desert.这条铁路贯穿数百英里的沙漠。小练习：翻译句子。他有二百本书。_.,He has two hundred books.,Words,thousandaznd num.千 thousands of数千的.eg：The little boy can count up to a thousand.这个小男孩能够数到一千。It travels thousands of miles per second.它一秒钟能走几千英里。小练习：翻译句子。我们学校的学生总计两千人。_.,The students of our school is two thousand in total.,Words,millionmljn num.百万；millions of成百万的,许许多多的 eg：It is estimated that the damage was over one million dollars.据估计，损失超过了一百万元。There were millions of people in the square.广场上有好多好多人。小练习：翻译句子。世界上有数以百万计的生物。_.,There are millions of living things on the earth.,Words,footft n.英尺；还可以用作脚，at the foot of意为在脚下 eg：Twelve inches make a foot.12英寸为一英尺。He goes to school not by bus,but on foot.他去上学不是乘公共汽车，而是走路去的。小练习：翻译句子。山脚下有一个美丽的湖。_.,There is a beautiful lake at the foot of the hill.,Words,squareskwe(r)adj.平方的；还可以用作n.正方形，广场 eg：144 square inches equals 1 square foot.144 平方英寸等于1平方英尺。The little girl drew a square on the paper.小女孩在纸上画了一个正方形。小练习：翻译句子：这个城市面积有10平方英里。_.,The city covered ten square miles.,Words,metre=metermi:t(r)n.米，公尺 eg：1000 metres is a long distance.1000米是一段很长的距离。小练习：句子。这根绳子比那根长4米。_.,This rope is four metres longer than that one.,Words,areaeri n.面积；还可以意为地区，地段；区域；领域 eg：The farm has an area of 100 square kilometers.这个农场占地100平方公里。There arent any big stores in this area.在这个地区没有大商店。小练习：翻译句子。办公室的面积是35平方米。_.,The area of the office is 35 square meters.,Words,overv(r)prep.超过=more than；还可以意为在.的上方；遍及地；在.期间 eg：There is a lamp over the table.桌子正上方有一盏灯。He scattered his clothes all over the floor.他把衣服扔了一地。Will you be at home over Christmas?你圣诞节期间在家吗?小练习：翻译句子。他爷爷九十多岁了。_.,His grandpa is over ninety years old now.,Grammar,1.基数词:表示数目的词称为基数词。其形式如下：A从110:one，two，three，four，five，six，seven，eight，nine，tenB从 1119:eleven，twelve，thirteen，fourteen，fifteen，sixteen，seventeen，eighteen，nineteenC从 2199：整数几十中除twenty，thirty,forty，fifty，eighty为特殊形式外，sixty，seventy，ninety都是其个位数形式后添加后缀-ty构成。表示几十几时，在几十和个位基数词形式之间添加连字符“-”。,Grammar,D百位数个数基数词形式加“hundred”，表示几百，在几十几与百位间加上andeg：101 a hundred and one320 three hundred and twenty E千位数以上从数字的右端向左端数起，每三位数加一个逗号“，”。从右开始，第一个“，”前的数字后添加 thousand，第二个“，”前面的数字后添加 million，第三个“，”前的数字后添加 billion。然后一节一节分别表示，两个逗号之间最大的数为百位数形式。,Grammar,基数词的句法功能：基数词在句中可作主语、宾语、定语、表语、同位语。eg：The two happily opened the box两个人高兴地打开了盒子。（作主语）I need three altogether我总共需要三个。（作宾语）Four students are playing volleyball outside 四个学生在外面打排球。（作定语）We are sixteen我们是16个人。（作表语）They three tried to finish the task before sunset 他们三个人尽力想在日落前完成任务。（作同位语）,Grammar,序数词：表示顺序的词称为序数词。序数词的主要形式：A从第一至第十九：其中，one first，two second，three third，five fifth，eighteighth，nineninth，twelve twelfth为特殊形式，其它的序数词都是由其相对应的基数词后面添加“th”构成。B从第二十至第九十九：整数第几十的形式由其对应的基数词改变结尾字母y为i，再加“eth”构成，thirtythirtieth。表示第几十几时，用几十的基数词形式加上连字符“”和个位序数词形式一起表示，thirty-first 第三十一，fifty-sixth 第五十六。,Grammar,C第一百以上的多位序数词：由基数词的形式变结尾部分为序数词形式来表示。eg：one hundred and twenty-first 第一百二十一 D序数词的缩写形式：有时，序数词可以用缩写形式来表示。主要缩写形式有。eg：firstlst second2nd third3rd fourth4th sixth6th twentieth20th twenty-third23rd；其中lst，2nd，3rd为特殊形式，其它的都是阿拉伯数字后加上th。,Grammar,E序数词的句法功能：序数词在句中可作主语、宾语、定语和表语。eg：The second is what I really need第二个是我真正需要的。（作主语）He choose the second他挑选了第二个。（作宾语）We are to carry out the first plan我们将执行第一个计划。（作定语）She is the second in our class在我们班她是第二名。（作表语）,Dialogue,1.People from about 180 countries and areas live in New York.来自大约180个国家和地区的人们住在纽约。2.The CN Tower is 1815 feet tall.西恩塔有1815英尺高。3.Red Square in Moscow is about 91,000 square metres in size.莫斯科的红场在面积上大约有91,000 平方米。4.France has an area of over 260,000 square miles.法国的面积超过260,000 平方英里。5.There are about 8,000,000 people living in London.大约有8,000,000人居住在伦敦。,Expand,阿拉伯数字是现今国际上通用的一种数字符号。最初由印度人发明，后由阿拉伯人传向欧洲，之后再经欧洲人将其现代化。正因阿拉伯人的传播，成为该种数字最终被国际通用的关键节点，所以人们称其为“阿拉伯数字”。阿拉伯数字由0，1，2，3，4，5，6，7，8，9共10个计数符号组成。采取位值法，高位在左，低位在右，从左往右书写。借助一些简单的数学符号（小数点、负号等），这个系统可以明确的表示所有的有理数。为了表示极大或极小的数字，人们在阿拉伯数字的基础上创造了科学记数法，这是人类文明进步的一大重要表现和文明成果。,阿拉伯数字的来源,Summary,zero hundred thousand million foot square metre area over,Exercise,1.Sam enjoyed collecting.He has collected over three _ stamps.A.hundred B.hundreds C.hundred of D.hundreds of2.Where is Class _?Its on the _ floor.A.Ninth,second B.Ninth,two C.Nine,second D.Nine two3.Please turn to Page _ and read the _ story.A.Ten,two B.Ten,second C.Tenth,second D.Tenth,two4.It is said that _ of the water all over the world _ polluted.A.two three,is B.two thirds,is C.two thirds,are D.two thirds,has,A,C,B,B,Exercise,1There are about three_（千）students in our school.2The boy has a_(方形的)face3My birthday is on the_(二十)of June4一Whats on the_(架子)?一There are a lot of books on them5_（超过）8,000,000 people visit London every year.6The lovely dog is lying_(在旁边)its master,thousand,square,twenty,Over,shelf,beside,Homework,Remember the cardinal and ordinal numbers we have learned in class.,
