人教版八年级英语下册 Unit7第3课时 教学课件PPT初二公开课

1、Unit 7 Whats the highest mountain in the world?Section A Grammar Focus-4c初中英语 八年级下册 RJNew word: oceanExpression: the Pacific OceanGrammar: 较大数字的表达方法； 形容词和副词的比较级和最高级Learning goalsQomolangma is 8,848.86 meters high and is still growing.It takes at least 30,000 USD to climb Qomolangma.More than 7,000 c

2、limbers reach the summit of Qomolangma.About 300 people have died on the mountain.Warming upSome interesting facts about Qomolangma5.The summit of Qomolangma is on the border of Nepal and Tibet (China). Nepal lies to the south and China to the north.8,848.86eight point eight six30,000thirty thousand

3、7,000seven thousand61,021sixty-one thousand and twenty-oneeight thousand eight hundred and forty-Can you read these large numbers?Presentation大数字的表达和读法 大于1000的基数词的表达法：从数字的右端向左数，每三位数加一个逗点；第一个逗点前的数为thousand（千）， 第二个逗点前的数为million（百万）， 第三个逗点前的数为billion（十亿）。读的时候通常在hundred后加and，如果百位数为0， 则在thousand后加and。267

4、42, 674andthousand hundredtwo thousand six hundred and seventy-four从数字右端向左数，每三位数加一个逗点；第一个逗点前的数为thousand（千）；读的时候通常在hundred后加and。1835708918,357,089andmillionthousandeighteen million, three hundred and fifty-seven thousand, and eighty-nine从数字右端向左数，每三位数加一个逗点；第一个逗点前的数为thousand（千）；第二个 逗点前的数为million（百万）；读的

5、时候通常在hundred后加and，如果百位数为0，则在thousand后加and。Reversal Game1,430,6722,760,431one million, four hundred and thirty thousand, six hundred and seventy-twotwo million, seven hundred and sixty thousand, four hundred and thirty-one 3826.BrainstormThe ise.g. The basketball player is 2 meters tall. The river is

6、 about 2 meters wide/deep.The mountain is about 2 thousand meters high. The river is about 2 kilometers long.长、宽、高、深的表达法： 基数词+单位词+形容词（long、wide、high、deep等）。当基数词大于1时， 单位词用复数形式。Whats the highest mountain in the world?Qomolangma.Its 8,844.43 meters high. Its higher than any other mountain.Which is the

7、deepest salt lake in the world?The Caspian Sea is the deepest of all the salt lakes.Did you know that China is one of the oldest countries in the world?Yes, I did. Its much older than the US.Find the comparatives and superlatives.How high is Qomolangma?此句型用比较级表 达最高级含义Grammar Focus形容词和副词通常有三种级别：原级(Po

8、sitive form): 没有比较含义，“”；比较级( Comparative form ):两者间比较“更”；最高级(Superlative form)：三者及三者以上比较， “最”。注意：某些形容词和副词只用原级，如：perfect、excellent、dead等。Presentation形容词和副词的比较级和最高级 语法概述形容词和副词的比较级用于两者之间的比较, 表示“较”或“更一些”；形容词和副词的最 高级用于三者或三者以上的人或物之间的比较，表示 “最”形容词最高级前一般要加定冠词the，副词 最高级前的the可以省略。（一）比较级和最高级的构成1. 规则变化单音节和部分双音节词

9、多音节词和部 分双音节词一般在 词尾直 接加-er 或-est以e结 尾的， 词尾 加-r或-st以“辅音 字母+y” 结尾的， 改y为i加-er或-est重读闭音节以 一个辅音字母 结尾的，双写 这个辅音字母 再加-er或-est在原级前加 more构成比较 级，加most构 成最高级long longer longestnice nicer nicestheavy heavier heaviestbigbiggerbiggestbeautifulmore beautifulmost beautiful2. 不规则变化原级比较级最高级good/wellbetterbestmany/muchm

10、oremostbad/badlyworseworstlittlelessleastfarfarther/furtherfarthest/furthest比较级 + than比较级 + and + 比较级the + 比较级，the + 比较级A + 倍数 + 比较级 + than + Bthe + 比较级 + of the two.Which/Who . + 比较级， A or B ?（二）比较级的用法【特别提醒】(1) 比较的对象必须一致。Your skirt looks more beautiful than mine. 你的裙子比 我的好看。(2) 有时为了避免重复，可用that或thos

11、e代替前面提到的词，而且that或those不能省略。The population of Suihua is much smaller than that of Harbin. 绥化的人口比哈尔滨的(人口)少得多。The dishes in this restaurant are more delicious than those in that restaurant. 这家饭店的菜比那家的好吃。(3) “a/an + 比较级”表示“又一/再一更的”。Lily has a doll, but she wants a bigger one. 莉莉有一 个玩具娃娃，但是她想要一个更大的。（三）最高

12、级的用法1. (the +) 最高级 + in/of 短语该结构意为“中最的”。I think spring is the best time of a year. 我认为春天是 一年中最好的时节。Tom works (the) hardest in Class 3. 在三班汤姆学习最努力。2. one of the + 最高级 + 可数名词复数 + in/of 短语 该结构意为“中最的之一”。Hangzhou is one of the most beautiful cities in the world. 杭州是世界上最美的城市之一。of与in都有“在当中”的意思。但它们有 严格的区别。用

13、of的时候,主语同of后面的词是 指同一类的人或物。而用in的时候,主语同in后 面的词是指不同类的人或物。3. the + 序数词 + 最高级 + 可数名词单数 + in/of 短语 该结构意为“在中是第几的”（从第二开始）。As we all know, the Yellow River is the second longest river in China. 众所周知，黄河是中国第二长河。4. Which/Who . + 最高级, A, B or C?该结构意为“A、B、C中，哪个/谁最？”。Which is the biggest, Beijing, Shanghai or Guan

14、gzhou?哪个（城市）最大，北京、上海还是广州？【特别提醒】(1)最高级前有物主代词、名词所有格等修饰时，其前 不加the。The Yangtze River is Chinas longest river. 长江是中国最长的河流。(2)当most表示“非常”时，其前不加the。It is a most useful book. 它是一本非常有用的书。4a Fill in the blanks with the correct forms of the words in the box.big much popular long old high1. The Amazon River is

15、one of the l_o_n_g_es_t rivers in the world. Its a little _l_o_n_g_e_r than the Yangtze River.2. Qomolangma is 8,844.43 meters h_i_g_h . Its one of the most p_o_p_u_l_a_r places for serious mountain climbers.Pacific Ocean.4a Fill in the blanks with the correct forms of the words in the box.big much

16、popular long old high4. Although Japan is o_l_d_erthan Canada, it is mu_c_h smaller.太平洋n. 大海，海洋3. No ocean in the world is as b_i_gas theMake comparisons according to the table.the Nile Riverthe Amazon Riverthe Yangtze Riverthe Yellow River6,671 km6,480 km6,300 km5,464 kmThe Nile River is the longes

17、t river in the world.No river in the world is as long as the Nile River.The Amazon River is one of the longest rivers in the world.The Amazon River is a little longer than the Yangtze River.The Nile River is much longer than the Yellow River.4b Write two comparisons about two topics. Write true fact

18、s.e.g.Two rivers: the Yangtze Riverand the Amazon River The Yangtze River is almost as long as the Amazon River. The Amazon is longer than the Yangtze, but the Yangtze is the longest river in China.1.2.1.2.Two cities: S_i_n_g_ap_o_r_eand K_u_a_l_a_L_u_mp_u_r _S_in_g_a_p_o_r_e_i_s_a_s_mo_d_e_rn a_s_K

19、u_al_a_Lu_m_p_u_r_. _S_in_g_a_p_o_r_e_i_s_b_i_g_g_e_r _th_a_n K_u_a_l_a_L_u_mp_u_r_a_n_d_h_a_s a_l_a_rg_e_r_p_o_p_u_l_a_ti_o_n_t_h_a_n_Ku_a_la L_u_m_p_u_r_. Two animals: R_a_b_b_itand S_n_a_i_l _A ra_b_b_i_t _is b_ig_g_e_r_t_h_a_n_a sn_a_i_l._A sn_a_i_l _is sma_ll_e_r_t_h_an a_r_a_b_b_it_,_a_n_d_i_t

20、_r_u_n_s_s_lo_we_r _t_h_an a_r_a_b_b_it_. 4c Write five questions using comparisons. Then ask your partner your questions.Wh_a_t_i_s_th_e h_ig_h_e_s_t_b_u_i_ld_i_n_g_i_n_o_u_r ci_t_y_? Wh_a_t_i_s_th_e b_u_s_ie_s_t_s_u_b_w_a_y st_a_ti_o_n_i_n_o_u_r ci_t_y_? Wh_a_t_i_s_th_e la_r_g_e_s_t _sh_o_p_p_i_n_

21、g_ma_ll in o_u_r _c_it_y_?Wh_i_c_h_i_s_th_e b_ig_g_e_s_t_p_a_r_k_i_n_o_u_r_c_i_ty_?Wh_i_c_h_i_s_th_e lo_n_g_e_s_t_r_o_a_d_i_n_o_u_r_c_i_ty_?Which place is the best for our school trip?Our school is going on a school trip in the city. Which is the best place to go to? Can you give some advice and why

22、? Work in groups of 5 and report to the class.Remember to use comparisons.Example:We think is the best place for us to go on a school trip. Of all the places, it is the . And we can also . So we all think it is a good idea to visit .一、单项选择A. carefulC. most carefulB. more carefulD. the most careful1.

23、(2021北京中考)The teacher is glad to see that Tony is Bthan before.2.(2021吉林中考) Is Larry as Bas Oliver?No, he isnt. Larry is shorter.A. tallerB. tallC. the tallestExercises3.(2021黄冈中考) Who is the girl dancing on the stage?Oh, shes my friend Maria. She dances B than before.A.wellB.much betterC.bestD.the

24、best 4.(2021青海中考) Chinese government has controlledCOVID-19 C.I think so. China is the only country that allows millions of people traveling around during holidays. A.successfulB.more successfullyC.most successfullyA.the tallest; taller C.the tallest; tallB.tallest; taller D.tallest; tall5.(2021新疆中考) Do you know that Tom is one of Cstudents in his class? Yes, I do. Hes a