八下unit7sectionA1a-1c

1、Who is taller, Pan Changjiang or Liu Xiang?Liu Xiang.Which box is bigger, the red box or the green box? The red box.This apple is the biggest of all.Which apple is the biggest?形容詞和副詞的比較等級(jí)形容詞和副詞的比較等級(jí) 大多數(shù)形容詞和副詞有三個(gè)等級(jí)大多數(shù)形容詞和副詞有三個(gè)等級(jí): a. 原級(jí)，原級(jí)，即原形。如即原形。如big(大）。大）。 b. 比較級(jí)，比較級(jí)，表示表示 “ 較較 ” 或或 “ 更更一些一些 ”。 如如:

2、 bigger（更大）（更大） c. 最高級(jí)，最高級(jí)，表示表示 “最最”。如。如: biggest（最大）（最大）1. 規(guī)則變化規(guī)則變化形容詞和副詞的比較級(jí)和最高級(jí)的構(gòu)成形容詞和副詞的比較級(jí)和最高級(jí)的構(gòu)成(1)一般在詞尾加 -er 或 -est highhigher-highest(2)以字母e結(jié)尾的詞，在詞尾加 r 或 -st latelater-latest(3)重讀閉音節(jié)詞詞尾只有一個(gè)輔音字母時(shí)，先雙寫該輔音字母，再加 er 或 -est bigbigger-biggest(4)以“ 輔音字母+y ”結(jié)尾的雙音節(jié)詞，先把“ y ”改為“ i ”，再加 er 或 -est happyhap

3、pier-happiest(5)多音節(jié)詞和部分雙音節(jié)詞，在詞前加 more 或 most popular-more popularmost popular2. 不規(guī)則變化不規(guī)則變化原級(jí)比較級(jí)最高級(jí)good/wellbetterbestbad/badlyworseworstmany/muchmoremostlittlelessleastfarfartherfarthestfurtherfurthest 比較級(jí)的用法比較級(jí)的用法 表示兩者（人或事物）的比較表示兩者（人或事物）的比較, 用用 “比較級(jí)比較級(jí) + than”。Liu Xiang is taller than Pan Changjian

4、g.Beijing is bigger than Hainan. 最高級(jí)的用法最高級(jí)的用法 表示三者或三者以上表示三者或三者以上 ( 人或事物人或事物 ) 的比較。最高級(jí)前面一般加定冠詞的比較。最高級(jí)前面一般加定冠詞the, 后面可帶短語后面可帶短語in/of來說明比較的范圍。來說明比較的范圍。 如如: Tony is the tallest in our class. This ruler is the longest of all. 南岳衡山 海拔海拔1300.2米米 東岳泰山英文名：Mount Tai海拔1532.7米 北岳恒山北岳恒山西岳華山西岳華山海拔2154.9米，居五岳之首。 海

5、拔2016.1米 中岳嵩山中岳嵩山 海拔海拔1491.7米米 泰山泰山 1532.7米米 衡山衡山 1300.2米米 華山華山 2154.9米米 恒山恒山 2016.1米米 嵩山嵩山 1491.7米米What is the highest mountain of the five mountains?Whats the highest mountain in China?Emei Mountainsquare skwe(r) n. 平方平方meter mi:t(r) n. 米米deep di:p adj. 深的深的desert dezt n. 沙漠沙漠Qomolangma Do you kno

6、w its name?珠穆朗瑪峰簡稱珠峰，位于中國和尼泊爾交界的喜馬拉雅山脈之上，終年積雪。高度8,844.43米，是世界第一高峰，最長達(dá)26公里。Do you know how high it is? Its about 8,844 meters high, the highest mountain in the world. Its 6,671 kilometers long, the longest river in the world. The Nile尼羅河長6,671 千米，是世界上最長的河流。Do you know its name?Do you know how long it

7、 is?It is 1,025 meters deep, the deepest salt lake in the world. Do you know its name?The Caspian SeaDo you know how deep it is?里海是世界上最大、最深的咸水湖，深為1,025米。It is about 9,600,000 square kilometers in size， the biggest desert in the world. The SaharaDo you know its name?Do you know how big it is?撒哈拉沙漠是世界

8、第一大荒漠，大約960萬平方千米A: -What is the highest mountain/ the longest river / the deepest salt lake/ the biggest desert in the world?B: - QomolangmaThe NileThe Caspian SeaThe Sahara1a Match the facts you know.Qomolangma about 9,600,000 square kilometers in sizeThe Sahara1,025 meters deepThe Caspian Sea6,671

9、 kilometers longThe Nile8,844.43 meters high8,844.43 meters high. 8,844.43米高米高 meters high (long, wide, deep)米高（長，米高（長，深深)。英語表示英語表示“有多有多高高（長長,寬寬,深深）”時(shí)，一般時(shí)，一般將將基基數(shù)詞數(shù)詞和和數(shù)量單位數(shù)量單位放在表示放在表示長寬高深長寬高深的的形容詞形容詞前前作狀語作狀語。e.g. The tree is 2 meters high. 提問提問How+high/deep/long/wide +be+主語？主語？e.g. How high is the t

10、ree？注意：注意：square kilometer=km2 square meter=m2英語數(shù)字讀法英語數(shù)字讀法1百位數(shù)百位數(shù) “hundred(百百)”,表示表示101999先說幾百，再加先說幾百，再加and,再加末尾兩位再加末尾兩位數(shù)或末尾數(shù)。數(shù)或末尾數(shù)。 101 one hundred and one 320 three hundred and twenty 2千位數(shù)以上千位數(shù)以上 從數(shù)字的從數(shù)字的右端向左端右端向左端數(shù)起，每三位數(shù)加一個(gè)逗號(hào)數(shù)起，每三位數(shù)加一個(gè)逗號(hào)“，”。從右開始，。從右開始，第一個(gè)第一個(gè)“，”表示表示 thousand（千）（千），第二個(gè)第二個(gè)“，”表示表示mil

11、lion（百萬）（百萬），第三個(gè)第三個(gè)“，”表示表示billion(十億十億)。然后一節(jié)一節(jié)用幾百幾十幾的方法表示。在這類數(shù)詞中然后一節(jié)一節(jié)用幾百幾十幾的方法表示。在這類數(shù)詞中hundred, thousand, million , billion等詞一般都用等詞一般都用單數(shù)形式。單數(shù)形式。1,025 one thousand and twenty-five6,671 six thousand six hundred and seventy-one 9,600,000 nine million six hundred thousand568,095,301,700hundredtousandm

12、illionbillion十億十億千千百萬百萬百百注意：從后往前，三個(gè)數(shù)字標(biāo)一個(gè)逗號(hào)，讀的時(shí)候從前讀到后注意：從后往前，三個(gè)數(shù)字標(biāo)一個(gè)逗號(hào)，讀的時(shí)候從前讀到后213547028503786541053786549908650837065417902How high is Qomolangma? Qomolangma Qomolangma Its 8,844.43 metrs high. The Nile Its 6,671 kilometers long. The NileHow long is the Nile?The Caspian Sea The Caspian Sea It is 1,

13、025 metres deep.How deep is the Caspian Sea? The Sahara It is about 9, 600 ,000 square kilometres in size.The SaharaHow big is the Sahara ?1b. Listen and choose the best answer.( ) 1. Qomolangma is _ than any other mountain in the world. A high B higher C the highest ( )2. The Sahara is _ desert in

14、the world.A the highest B the longest C the biggest( )3. The Caspian Sea is _ of all the salt lakes.A the deepest B the longest C the cleanest( )4. The Nile is _ river in the world.A the longest B the biggest C the deepest BAAC1b. Listen and complete the sentences.1. Qomolangma is _ than any other m

15、ountain 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 longest1c. Use the information in 1b to Make conversations .A: What is the highest mountain in the world?B: Qomolangma.A: Wha

16、t is the longest river in the world?B: The Nile.A: What is the biggest desert in the world?B: The Sahara.A: What is the deepest salt lake in the world?B: The Caspian Sea.Whats the highest mountain in ?JapanAmericaEnglandRobson, Mount (羅布森山) Fuji Mountain(富士山)Mount Mckinley(麥金利山)Ben Nevis(本尼維斯本尼維斯）Ca

17、nada注意！Qomolangma is higher than any other mountain in the world. 注意：此句是比較級(jí)表達(dá)最高級(jí)的含義。注意：此句是比較級(jí)表達(dá)最高級(jí)的含義。any other +單數(shù)名詞單數(shù)名詞 “其它任何一個(gè)其它任何一個(gè)” 例如：例如：李明是他們班上最高的一個(gè)學(xué)生。李明是他們班上最高的一個(gè)學(xué)生。Li Ming is taller than any other student in his class.= Li Ming is the tallest student in his class.注意！The Caspian Sea is the d

18、eepest of all the salt lakes. 注意：用于最高級(jí)表達(dá)范圍的介詞：注意：用于最高級(jí)表達(dá)范圍的介詞：of ,in, among例如：在這三個(gè)中例如：在這三個(gè)中Li Ming是高的。是高的。Li Ming is the tallest of the three. Summing up（總結(jié)）（總結(jié)） New words : square -平方；正方形；廣場平方；正方形；廣場 meter-米；公尺米；公尺deep -深的深的 desert-沙漠沙漠 Phrases: square kilometre 數(shù)詞數(shù)詞+ metres deep/long/high any other mountain in the world of all the lakes Important sentences: 1.The Nile is 6,671 kilometres long. 2. Qomolangma is higher than any other mountain in the world. 3. The Caspian Sea is the deepest of all the salt lakes. 單項(xiàng)選擇。 ( ) 1. The Sahara is _ in the wo