1、Unit 7 Section APeriod 1(1a-1c)一般情况下加-er 或est:tall-taller-tallest small-smaller-smallest2.以字母e结尾的形容词，加-r 或-stnice nicer-nicest safe safer-safest4.以“辅音字母y”结尾的双音节词，先改“y”为“i”，再加-er 或-est.early-earlier-earliest形容词副词比较级最高级规则形容词副词比较级最高级规则3.重读闭音节词只有一个辅音字母时，应先双写辅音字母,再 加-er 或-est.bigbigger-biggest fatfatter-
2、fattest5.5.部分双音节词或多音节词前面加部分双音节词或多音节词前面加more,most.如:interesting more interesting most interestingfamous more famous most famous原级比较级最高级good/wellbetterbestbad/illworseworstmany/muchmoremostlittlelessleastfarfartherfarthestoldolder elderoldest eldest两好、两好、两坏、两坏、两多、两多、一少、一少、一远一远、一老一老.知识点梳理（形容词比较级用法）（1）“
3、The+比较级比较级，the+比较级比较级”表示表示“越越 ，越，越”（2）在比较级前面使用的修饰词有：）在比较级前面使用的修饰词有：even（更，更加），（更，更加），a little（有点），（有点），far/much/a lot（更加，（更加，的多）的多）（3）表示倍数时用）表示倍数时用:times+比较级比较级+than（4）as as(与与一样），一样），not as（so)as （与（与不一样）中间用原级。不一样）中间用原级。知识点梳理（形容词最高级用法）（1）最高级的句式中一般带有表示比较范围的）最高级的句式中一般带有表示比较范围的介词短语，比如介词短语，比如:in our cl
4、ass,of the three 等等（2）表示）表示“最最之一之一”的句式，要用的句式，要用 one of the +形容词最高级形容词最高级+复数名词。复数名词。（3）句型：）句型：Which/Who+比较级，比较级，A or B?Which/Who+最高级，最高级，A ，B or C?Which is the highest mountain in the world?Which is the longest river in the world?Do you like Geography?Do you know this?Qomolangma runs along the border
5、 between China and Nepal.It is covered with snow all the year round.Its 8844.43 meters high,the highest in the world.Its 26 kilometers long.The Sahara is the biggest desert in the world.It is located in the northern Africa.Its climate conditions are very bad and is one of the earths most unsuitable
6、for biological survival.The Caspian Sea(里海里海)is the biggest inland lake in the world.The max depth is 1,025m(in the southern part).It lies in the border between Asia and Europe.The Nile is the longest river in the world.Its more than 6,600 kilometers long.It runs through 9 countries.Its one of the l
7、argest river flowing through the international states in the world and runs into the Mediterranean Sea(地中海地中海)in the end.The Yangtze River is the third longest river in the world,and the first Asian river.Its 6211.31 kilometers long.The Yangtze River Basin,east-west width of 3,219 kilometers,about 9
8、66 kilometers wide north-south,passing through 11 provinces.It runs into the East Sea in Shanghai finally.Can you read these numbers?8844.43 meters high1,025 meters deep6,600 kilometers long3,219 kilometers wide(“小数点小数点”读作读作“point”)10,001thousandonekeyTen thousand and one千位数的读法千位数的读法 1,111,111millio
9、nthousandone million one hundred and eleven thousand one hundred and eleven数词的解读技巧数词的解读技巧 如果在万位以下的话只要直接读出该如果在万位以下的话只要直接读出该数值即可。数值即可。特大数字如果在万分位以上的话，是特大数字如果在万分位以上的话，是通过通过三位三位三位三位的读，来读出数值。的读，来读出数值。一般的排列顺序是从大到小：一般的排列顺序是从大到小：billion（十亿）（十亿）,million（百万）（百万）,thousand,hundred.这些英文的数值代表三位三这些英文的数值代表三位三位的进位读法，
10、位的进位读法，每次读完一个单元后每次读完一个单元后，就加上这些数值。，就加上这些数值。Can you read them 5648,844 1,02523,357 9,600,00075,320,612 five hundred and sixty-foureight thousand eight hundred and forty-fourtwenty-three thousand,three hundred and fifty-sevenseven-five million,three hundred and twenty thousand,six hundred and twelve n
11、ine million,six hundred thousandone thousand and twenty-fiveMatch the facts you know.Qomolangma about 9,600,000 square kilometers in sizeThe Sahara1,025 meters deepThe Caspian Sea6,671 kilometers longThe Nile8,844.43 meters high 8,844.43 meters high.8,844米高米高注：英语表示注：英语表示“有多长有多长(宽，高，宽，高，深深)”时，其结构为时，其
12、结构为“数词数词+单位名词单位名词+形容词形容词(high,long,wide,deep)”或或“数词数词+单位名词单位名词+in+名词（名词（height,length,width,depth）（数词数词1时名词变复数时名词变复数）The wall is 1.7 meters high.=The wall is 1.7meters in height.A:How high is Qomolangma?B:Its 8,844.43 meters high.How long is the Nile?Its 6,671 kilometers long.How big is the Sahara?I
13、ts about 9,600,000 square kilometers in size.Listen and complete the sentences.1.Qomolangma is _ than any other mountain in the world.2.The Sahara is _ desert in the world.3.The Caspian Sea is _ of all the salt lakes.4.The Nile is _ river in the world.higherthe biggestthe deepestthe longestUse the i
14、nformation in 1b to make conversations.A:What is the highest mountain in the world?B:Qomolangma.Practice in pairs like this:A:What is the in the?B:A:How is it?B:Its What is the longest river in the world?The Nile.How long is it?Its 6,671kilometers long.Who knows“the most”most?(谁知道的“最”最多？)Samples：Russia is the biggest country in the world.The Pacific Ocean is the largest ocean.He is the tallest boys of all.1.物体物体“长宽高深长宽高深”表示法表示法 meters deep,meters long,meters high,meters wide2.用形容词最高级描述世界之最。用形容词最高级描述世界之最。Do the other exercises in this part.
