英语人教版八年级下册Unit 7 (Section A 1a-1c)课件.ppt

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1、【学习目标学习目标】1.能够正确拼、读、写能够正确拼、读、写hardly,through,although等词汇。等词汇。2.通过小组合作，掌握词汇的拼读记忆规则和方法。通过小组合作，掌握词汇的拼读记忆规则和方法。3.能够与他人相互学习，相互帮助，提升自己的英语水平。能够与他人相互学习，相互帮助，提升自己的英语水平。【重点重点】：percent,magazine,however等词汇的读和写。等词汇的读和写。【难点难点】：less than,such as,at least等短语的运用。等短语的运用。带带着着目目标标努努力力，带带着着梦梦想想飞飞翔翔【学习目标学习目标】1.1.能够正确拼、读、

2、写能够正确拼、读、写square,desert,square,desert,populationpopulation等词汇。等词汇。2.2.能够认读百位，千位或以上数位的基能够认读百位，千位或以上数位的基 数词数词。3.3.复习形容词、副词比较级和最高级用复习形容词、副词比较级和最高级用 法。法。【难点难点】：百，千位及以上基数词的读：百，千位及以上基数词的读法。形容词，副词比较级和最高级的复法。形容词，副词比较级和最高级的复习。习。square n.平方平方meter n.米米deep adj.深的深的desert n.沙漠沙漠population n.人口人口Asia n.亚洲亚洲Whic

3、h isA.mountainB.riverC.lakeD.desertQomolangmathe Nilethe Caspian Seathe SaharaIt has two banks河岸.the richest?Do you know how high Qomolangma is?Its 8844.43 meters high.square kilometer=km2 square meter=m2度量单位使用规律度量单位使用规律（1）数词）数词+meters/kilometers+high/deep/long/wide（2）XX 平方米平方米=XX square meterHow+hi

4、gh/deep/long/wide+be+主语？主语？BADCAB=wideBC=longBD=deep/highHow to describe an object?描述描述BADCAB=2 meters wideBC=3 meters longBD=2.5 meters deep/high2x3x2.5=15 cubic meters(立方米立方米)So the box is not big in size.People can imagine the object according to the numbers,so numbers are important!Numbers are i

5、mportant!基数词复习基数词复习1.1-12无规律可循：无规律可循：_,_,_,_,_,_,_,_,_,_,_,_2.13-19,大多数是在基数词后面加大多数是在基数词后面加-_,如如14,16,17,19 是是_,_,_,_。但。但13,15,18有变化，它们是有变化，它们是_,_,_3.20-99,整十是在基数词后面加整十是在基数词后面加-_,如如60,70,90是是_,_,_。但。但20,30,40,50,80有变化，它们是有变化，它们是_,_,_,_,_。几十几的数字，十。几十几的数字，十位和个位之间需加位和个位之间需加_,如如25_,46_,91_.4.101-999,先说几百

6、，再加先说几百，再加_,再加几十几。如：再加几十几。如：185_,941_,508_onetwothree fourfivesixseveneightnineteneleventwelveteenfourteensixteenseventeennineteenthirteenfifteeneighteentysixtyseventyninetytwentythirtyfortyfiftyeighty-twenty-fiveforty-sixninety-oneandone hundred and eighty-fivenine hundred and forty-onefive hundred

7、 and eight812420994629713967 245937nineteenthirteenfifteentwentyeighty3 hundred400038fourteen40127three hundred and twenty-eight7985.1000以上的数字，先从后往前数，每三位加一个逗号，第一以上的数字，先从后往前数，每三位加一个逗号，第一个逗号前是个逗号前是_,意思是意思是_;第二个逗号前是第二个逗号前是_,意思是意思是_;第三个逗号前是第三个逗号前是_,意思是意思是_.注意：注意：英语中没有英语中没有“万万”和和“亿亿”这个单位，要表示它们需这个单位，要表示它们

8、需借用借用_和和_来表示来表示；hundred,thousand,million,billion这几个词前面有具体数这几个词前面有具体数字时，本身用单数，如：字时，本身用单数，如：five hundred,ten thousand;但表示但表示不定数目时，它们既要用复数形式，还要和不定数目时，它们既要用复数形式，还要和of连用，如：连用，如：hundreds of,thousands of即时练习：请正确写出下列数字的读法：即时练习：请正确写出下列数字的读法：.8,402 _ .63,759_.154,216 _ .90,263,750_thousand千千million百万百万billion

9、十亿十亿thousandmillioneight thousand,four hundred and twosixty-three thousand,seven hundred and fifty-nine one hundred and fifty-four thousand,two hundred and sixteenninety million,two hundred and sixty-three thousand,seven hundred and fifty0,000,000,000thousandmillionbillion11234155,7216,155,70226,000

10、,008326,414,73598,408,000,102三位数：三位数：543 读作：读作：five hundred and forty-three四位数：四位数：8,954 eight thousand nine hundred and fifty-four五位数：五位数：73,871 thousand,hundred and -六位数：六位数：730,871 thousand,hundred and -七位数：七位数：7,300,871 million,thousand,hundred and -八位数：八位数：70,300,871 million,thousand,hundred an

11、d -九位数：九位数：700,300,871 million,thousand,hundred and -十位数：十位数：7,700,300,871 billion,million,thousand,hundred and -6.有小数点的，小数点读作有小数点的，小数点读作point,小数点后面的数小数点后面的数依次读出。如：依次读出。如：15.21读作读作fifteen point two one18 -35 18 is smaller than 35.=35 is bigger/larger than 18.0 -960 0 is much smaller than 960.5600-56

12、01 5600 is almost as big as 5601.56-560-15How to compare the three numbers?Lets compare the numbers:语法：形容词、副词的比较等级复习：语法：形容词、副词的比较等级复习：形容词、副词的比较等级分为形容词、副词的比较等级分为_,_和和 _。(一一)、写出下列形容词和副词的比较级和最高级写出下列形容词和副词的比较级和最高级deep _ _ thick_ _ wide_ _ few_ _ big _ _ hot_ _ thin_ _ easy _ _early_ _ friendly_ _beautif

13、ul_ _ outgoing_ _ good/well_ _ many/much_ _ill/bad/badly_ _ little_ _ far(2)_/_ _/_ old_/_ _/_ 原级原级比较级比较级最高级最高级deeperdeepestthickerthickestwiderwidestfewerfewestbiggerbiggesthotterhottestthinnerthinnesteasiereasiestearlierearliestfriendlierfriendliestmore beautifulmost beautifulmore outgoingmost out

14、goingbetterbestmoremostworseworstlessleastfartherfurtherfarthestfurthestolderelderoldesteldest1.一般情况一般情况:+er(比较级比较级)+est(最高级最高级)quiet-quieter-the quietest bright-brighter-the brightest2.词末为词末为-e（不发音）（不发音）+r-+stfine-finer-the finest nice-nicer-the nicest3.重读闭音节，末尾只有一个辅音字母的：双写重读闭音节，末尾只有一个辅音字母的：双写辅音字母辅

15、音字母+er-双写辅音字母双写辅音字母+esthot-hotter-the hottest wet-wetter-the wettest4.三个或三个以上音节的形容词只能加三个或三个以上音节的形容词只能加more和和most5.特殊变化特殊变化goodbetterbest many/muchmorethe mostGe You is _.Zhao Benshan is_.Pan Changjiang is_.funnythe funniest of the three funnier Lucy is _Lily.But Lucy isnt _ Lily.LucyLilytwinsas tall

16、 as(tall)(outgoing)as/so outgoing asThe third apple is _ _of all.bigbiggerbiggestthe biggestThe third apple is _ _the other two.bigger than10 yuan 20 yuan50 yuanThe third pen is _than the other two.expensivemore expensivemost expensiveThe third pen is _of the three.the most expensivemore expensivePr

17、acticeFill in the blanks with the proper form.1.Lily gets up _(early)than Lucy.2.Which goes _(slowly),Tom or Jim?3.This book is _(interesting)than that one.4.She works _(careful)in her school.5.Who goes to bed _(late)Jim,Tom or Jack?6.I think turkey is _(delicious)of all.earliermore slowly more inte

18、resting the most carefully latestthe most deliciousQuick check(1)My brother is _ more outgoing than me.A.many B.little C.much(2)The experiment was_ easier than we had expected.A.more B.much more C.much(3)If there were no examinations,we should have _ at school.A.the happiest time B.a more happier ti

19、me C.a much happier time(4)Traveling by train is excited than a rushed trip by air.A.much B.a little C.far more (5)这部电影和那部电影一样有趣。（asas）(6)这件红大衣和那件蓝色大衣一样长。(asas)BADCAB=2 meters wideBC=3 meters longBD=2.5 meters deep/highCompare objects in size.the Yangtze River Look and learn:Its _kilometers long.Its

20、 the longest river in China.Its the _longest river in the world.6,397thirdthe Caspian SeaIts _meters deep.Its the deepest of all the salty lakes.1,025the SaharaIts _square kilometers in size.Its the biggest desert in the world.9,000,000QomolangmaQomolangma is _meters high.Its the highest mountain in

21、 the world.8,848Qomolangma about 9,600,000 square kilometers in sizeThe Sahara 1,025 meters deepThe Caspian Sea 6,671 kilometers longThe Nile 8,844.43 meters high 1a.Match the facts you know.1.Qomolangma is_ than any other mountain in the world.2.The Sahara is _ desert in the world.3.The Caspian Sea

22、 is _ of all the salt lakes.4.The Nile is _ river in the world.1b.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.1b.Listen and complete the s

23、entences.higherthe biggestthe deepestthe longest8,844 meters high.8,844米高米高 meters high(long,wide)米高（长，宽米高（长，宽)。英语表示英语表示“有多长（宽，高有多长（宽，高）”时，时，一般一般将数词和数量单位放在表示长宽高的将数词和数量单位放在表示长宽高的形容词前作状语形容词前作状语。e.g.The wall is 1.7 metres wide.A:What is the biggest desert in the world?B:Sahara.A:What is the deepest salt lake in the world?B:Caspian sea.A:What is the longest river in the world?B:Nile.1c.Use the information in 1b to make conversations.