2017八年级英语下册Unit7What'sthehighestmountainintheworld课件.ppt

1、学习目标学习目标1)学习掌握下列词汇：学习掌握下列词汇：square meter deep desert population Asia 2）学会基数词（百万内数字）的）学会基数词（百万内数字）的表达。表达。3)复习比较级和最高级的表达。复习比较级和最高级的表达。4)学会学会population的用法。的用法。百位数的读法百位数的读法 700 503 946Nine hundred and fortysixSeven hundredFive hundred and three10,001thousandonekeyTen thousand and one千位数的读法千位数的读法 8,448 5

2、,009 1,051 9,243 Eight thousandfour hundred and fortyeightFive thousand and nineOne thousand and fiftyoneNine thousand two hundred and fortythree1111111,111One hundredAnd elevenkeyEleven thousand,one hundred and eleveneleventhousand万位数（十千）的读法万位数（十千）的读法10,000ten thousand20,001twenty thousand and one3

3、0,010thirty thousand and ten70,111seventy thousand one hundred and eleven 51,111fiftyone thousand one hundred and eleven 万位以上不到百万的读法万位以上不到百万的读法:用逗号隔开，用逗号隔开，第一个逗号读成第一个逗号读成thousand111,111:one hundred and eleven thousand one hundred and eleven222,222:two hundred and twenty two thousand two hundred and

4、twenty two 1,111,111One hundred eleven One One hundred and elevenmillionthousandone million one hundred and eleven thousand one hundred and eleven百万的读法百万的读法1,000,000 one million1,111,111 one million one hundred and eleven thousand one hundred and eleven1,000,001one million and one21,435,678four hund

5、red and thirtyfive thousand six hundred and seventyeight121,435,678one hundred and twentyone million four hundred and thirtyfive thousand six hundred and seventyeighttwentyone million数词的解读技巧数词的解读技巧三位数的读法：百位之后加三位数的读法：百位之后加_十位与个位之间有连字符十位与个位之间有连字符“”多位数读法，数字从后向前每三位加多位数读法，数字从后向前每三位加一个分隔符一个分隔符“，”。从后向前依次读。

6、从后向前依次读为：为：_，_。读出分。读出分隔符前的三位数然后加上这两个单位隔符前的三位数然后加上这两个单位就可以。就可以。andthousandMillion(百万百万）Can you read them 48 5644,321 9,54323,357 134,6651,243,233 75,320,612 thousand 千千hundred 百百 million 百万百万 fortyeightfive hundred and sixtyfourfour thousand,three hundred and twentyonenine thousand,five hundred and f

7、ortythreetwentythree thousand,three hundred and fiftysevenOne hundred and thirtyfour thousand,six hundred and sixtyfiveOne million,two hundred and fortythree thousand,two hundred and thirtythreesevenfive million,three hundred and twenty thousand,six hundred and twelve9,600,000-1,025-6,671-8,844.43-n

8、ine million,six hundred thousand one thousand and twentyfive six thousand six hundred and seventyone eight thousand eight hundred and fortyfour point four three形容词形容词的比较等级构成方式的比较等级构成方式:1.一般单音节一般单音节adj 的比较级多在原形上加的比较级多在原形上加er,最高级加最高级加est.多音节多音节adj在原形前加在原形前加 more,最高级加最高级加 mostRememberRemember原级原级比较级比较级

9、最高级最高级smallsmallersmallestbeautifulmore beautiful most beautifulpopularmore popularmost popular2.辅音字母加辅音字母加y结尾时结尾时,比较级比较级去去y变变i再再加加er,最高级最高级去去y变变i再再加加-est.eg.easy easier easiest3.以不发音的以不发音的e结尾时加结尾时加r/st.eg.fine finer finest4.重读闭音节结尾的词重读闭音节结尾的词,如末尾是一个辅音字母如末尾是一个辅音字母,双双写这个辅音字写这个辅音字母母,再加再加er/est.eg.big

10、bigger biggest5.不规则不规则adj的比较级与最高级如下的比较级与最高级如下:原级原级比较级比较级最高级最高级good/wellbetterbestbad/badlyworseworstmany/muchmoremostoldolder/elderoldest/eldestfarfarther/furtherfarthest/furtherlittlelessleast注：older 一般比年龄，新旧；elder指长幼关系(一般修饰名词);elder brother/sisterfarther指距离更远；further指抽像的.I want to study English fu

11、rther.cheapfine fatheavy thinnewcloseeasycheaper cheapestfiner finestfatter fattestheavier heaviestthinner thinnestnewer newestcloser closesteasier easiest完成导学案上比较状语从句结构完成导学案上比较状语从句结构比较状语从句是用于比较状语从句是用于_ 个人或事物相比较个人或事物相比较,被比较者用被比较者用_引出引出其句子结构为其句子结构为:主语主语+谓语谓语+形容词形容词/副词副词_级级+_+比较对象比较对象.两两than比较比较than 1

12、.than(比比)是比较连词，其前面形容词或副词要是比较连词，其前面形容词或副词要使用使用 _级级2.than后的比较对象是从句的主语，所以比较后的比较对象是从句的主语，所以比较对象是代词时一般用对象是代词时一般用_形式形式(口语中可以使口语中可以使用宾格用宾格)或用或用_代词。而且比较对象代词。而且比较对象后可以加后可以加do或或be的适当形式来补充从句谓语动的适当形式来补充从句谓语动词。词。比较比较主格主格名词性物主名词性物主一、用所给词的适当形式填空一、用所给词的适当形式填空1.Tom speaks _(slowly)than Sam_(do).2.This hole（坑）（坑）is _

13、(deep)than that one.3.His ruler is _(long)than _(she).4.Jim does _(well)than _(I)in the exam.more slowlydoesdeeperlongerhersbetterI5.Tom ran _(fast)than Tara _(do)6.Tara was _(tall)than Tina _(be)last year.7.Paul is (thin)than Peter8.Her hair is _(short)than _(you).fasterdidtallerwasthinnershorteryo

14、urs知识点二：知识点二：最高级的用法最高级的用法最高级一般用于最高级一般用于_者以上相比，最高级前者以上相比，最高级前一般要加定冠词一般要加定冠词_，其句子结构为，其句子结构为:主语主语+谓语谓语+形容词形容词/副词副词_级级+_.*注意：注意：1.of后接后接 _ 2.in后连接后连接_ For example:Tom is the tallest boy in our class.Tom is the tallest of the three boys.三三the最高最高Of/in短语短语比较对象比较对象比较范围比较范围1.Which is _(big),the sun,the moon

15、 or the earth?2.Which is _(beautiful),the black coat or the blue one?3.This mooncake is _(cheap)of all.4.He is _(strong)in the class.5.English is _(widely)spoken in the world.the biggestmore beautifulthe cheapestthe strongestthe most widelyLets enjoy the beauty of nature!mountainmountaindesertdesert

16、riverriverlakelakeoceanoceanfresh lakesalt lakeDo you know these places?the Saharathe Caspian SeaQomolangmathe Nile说一说 3分钟Zhujiang River is _.Yellow River is _ than Zhujiang River.Yangtze River is the _ river in China.What is the longest river in the world?The Nile is the _ river in the world.珠江珠江2210公里公里黄河黄河5464公里公里长江长江6300公里公里尼罗河尼罗河6671公里公里longlongerlongestlongestThe Tai Mountain is _.The Emei Mountain is _ than Tai Mount.Qomolangma is _.highhigherthe highestQomolangma说一说 3分钟The Caspian Sea is