人教版（2024）八年级下册（2024）Section A教课ppt课件

这是一份人教版（2024）八年级下册（2024）Section A教课ppt课件，共17页。PPT课件主要包含了 895， 768，thousand，million，billion，largest，close，louder，far等内容，欢迎下载使用。
1. T review the usage f the cmparatives and superlatives.2. T master the rules abut hw t read large numbers in English.3. T talk abut mre natural wnders and places using the target language.
Read the sentences. Circle the adjectives which cmpare things. Underline the adverbs which cmpare actins.
1.Munt Kilimanjar is________ (five thusand, eight hundred and ninety-five) metres (twenty-five thusand, seven hundred and sixty- eight) cubic metres f water purs dwn Inga Falls each East African Rift Valley is abut 4,000 (______________) miles Taklimakan Desert has a ttal area f abut 337,000 (____________________________________) square kilmetres.
three hundred and thirty-seven thusand
fur thusand
Write r spell ut the numbers.
/ˈkjuːbɪk/ 立方米
1.从数字的右端向左数，每三位数加一个逗号。2.从右向左，第一个逗号处读thusand（千），第二个逗号处读millin（百万），第三个逗号处读billin（十亿）。3.读数时，通常在hundred后加and；若百位数为0，则在thusand后加and。4.英语中无直接表示“万”和“亿”的单位词，需用thusand和millin表达，如“一万”是ten thusand、“一亿”是ne hundred millin。
四、较大数字的表达与读法
9，365,278,689
注意：小数点读作“pint”，小数点左边的数按整数读法读，右边的数依次读出每个数字。例如:3.14读作“three pint ne fur”8848.86 读作“eight thusand，eight hundred and frty-eight pint eight six" .
2,674 → ______________________________________________164,213,430 → ________________________________________ _________________________________________18,357,089 → _________________________________________ __________________________________________twenty-eight thusand, six hundred and fifty-six ___________frty millin, fur hundred and twenty-fur thusand _______
tw thusand six hundred and seventy-fur
ne hundred and sixty-fur millin, tw hundred and thirteen thusand, fur hundred and thirty
eighteen millin, three hundred and fifty-seven thusand, and eighty-nine
Cmplete the passage with the crrect frms f the wrds in the bx.
My friends and I visited Victria Falls in Africa last year. Visiting ne f the wrld's_________ waterfalls was a magical experience. As we went_________t the falls, the nise f the water slwly grew_________and luder. Then, right befre ur eyes, the waterfall appeared. It went n fr as ________ as the eye culd see. Later, we sat in a special pl at the tp f the falls. There, we felt the water rush past us and becme a part f the waterfall. It was the scariest but als the_______________experience f ur trip!
mst amazing
/ˈkjuːbɪk/ adj. 立方的
It went n fr as far as the eye culd see.它一眼望不到头。（教材P35 4c）
as far as... 远至（某处）
Everything is pssible ________ yu wrk hard.A. as much as B. as sn as C. as lng as D. as far as
拓展：as far as... 就……的限度，到……的程度相关短语&例句as far as I/we knw 据我/我们所知as/s far as I can see 依我看1. As far as we knw, the Sahara is the biggest desert in the wrld. 据我们所知，撒哈拉沙漠是世界上最大的沙漠。2.As far as I can see, there is n difference between the tw cmputers. 依我看，这两台电脑没有差别。
一、比较级(用于两者之间的比较)用法
形容词或副词的比较级+thanThe Changjiang River is lnger than it.长江比它长。Bill runs faster than any ther by in his class.比尔跑得比班上其他任何男孩都快。“比较级+and+比较级(单音节词和部分双音节词)” 或“mre and mre+原级(多音节词和部分双音节词)”表示“越来越……”。Summer is cming. It's getting htter and htter.夏天就要来了。天越来越热了。Our hmetwn is becming mre and mre beautiful. 我们的家乡变得越来越美丽。“the +比较级...，the+比较级..”表示“越……,就越……”。 The mre yu read, the mre yu knw. 你阅读得越多,知道的就越多the + 比较级 + f the tw (+ 名词复数) 表示“两者中较……的那个”。 Mike is the taller f the tw bys. 迈克是两个男孩中较高的那个。Which/Wh... + 比较级, A r B? 表示“ A和B哪个/谁更……？” Which city is larger, Beijing r Shanghai? 北京和上海，哪个城市更大？
二、 最高级(用于三者或三者以上的比较)的用法： ①the+形容词的最高级＋f/in... He is the tallest f the three. 他是这三个人中最高的。 He is the funniest in his class. 他是他们班最有趣的。②ne f the+形容词最高级+可数名词复数＋f/in... ……中最……的……之一 Pingya Ancient City is ne f the best-kept ancient cities in China.平遥古城是中国保存最完好的古城之一。③Which/Wh ...+(the) +最高级, A, B r C ?Wh sings the best in yur class, Lily,Tm r Jack?你们班谁唱的最好，莉莉、汤姆还是杰克？the +序数词+形容词最高级+可数名词单数+in/f 短语, 意为“在…中是第几……的……” The Yellw River is the secnd lngest river in China. 黄河是中国第二长河。
三、形容词、副词比较级、最高级构成： 一、 规则变化 ①一般情况下，单音节或双音节的形容词(或副词）比较级＋er ，最高级＋est clever－cleverer－cleverest few－fewer－fewest small－smaller－smallest ②以e结尾的词，比较级＋r，最高级＋st nice－nicer－nicest cute－cuter－cutest large－larger－largest ③以“辅音字母＋y”结尾的变y为i＋er或est easy－easier－easiest happy－happier－happiest④多音节和部分双音节词在形容词原级前＋mre构成比较级，＋the mst构成最高级。 beautiful－mre beautiful－the mst beautiful careful－mre careful－the mst careful
不规则变化 gd/ well －better－bestbad/badly－wrse－wrst many/much－mre－mst little －less－least far－farther－farthest (距离远) far－further－furthest (程度深) ld－elder－eldest (长幼) ld－lder－ldest (年龄)
Tips：一好一坏；一多一少；一远一老
用所给词的适当形式填空
1.The Yellw River is _________ (lng) than the Huaihe Tai is the _________ (high) f the tw muntains in sea is getting mre and mre _________ (beautiful) with envirnmental lake is the _________ (deep) in ur is _________ (lng), the Amazn River r the Nile River?6.This river is three metres __________ (wide) than that ne. 7.Hainan Island is the secnd __________(large) island in China. 8.The sunset ver the cean is ne f the _______________ (amazing) sceneries in the wrld.
Sum up what yu have learned.
形容词和副词的比较级与最高级
1. 比较级+than2. the + 比较级, the + 比较级3. 比较级 + and + 比较级mre and mre + 形容词/副词原级
1. (the +) 最高级 + in/f/amng短语2. ne f the + 形容词最高级 + 可数名词复数 + in/f短语3. “Which/Wh...(+the)+最高级, A, B r C?”4. the + 序数词 + 形容词最高级 + 可数名词单数 + in/f短语
一、用所给词的适当形式填空。
1.Lin Ta runs ________(fast) than his classmates. He is the running star in his mre we cmmunicate with ur parents, the _______(gd) we'll understand each Li always has a lt f wrk t d. Fr her, nthing is _______________(imprtant) than a prper mst f the students, June is always the ________(busy) mnth in a Xuesen, father f China's space prgram, is ne f the ________(great) scientists in the wrld.
mre imprtant
1.The Natinal Library f China is ______ public library in Asia.A. large B. larger C. largest D. the largest2. In a DIY club, the mre we practice, ______ we becme.A. the wrse B. the wrst C. the better D. the best3. Jurney t the West is ne f ______ classic nvels in China. Peple like reading it.A. famus B. mre famus C. the mre famus D. the mst famus4. It is said that smart technlgy is making peple ______ than befre and ding them harm.lazy B. lazier C. laziest D. the laziest3.The frest is becming ______ because mre trees are planted every year. A. greener and greener B. green and green C. mre and mre green D. greenest