人教版八年级下册-unit7知识点讲解课件.pptx（纯ppt,可能不含音视频素材）

1、9yuki吕宇晴八年级英语下unit7 Section A 2知识点讲解2谈论地理1.语法点讲解32020珠峰登顶测量3攀登者4Chinas top action star,Wu Jing,is going to conquer Qomolangma.中国功夫巨星吴京将征服珠峰。Wu acted in a film called The Climbers.It is based on the real-life expeditionof four Chinese mountaineers in 1960,who were the worlds first to climb Qomolangma

2、s north side successfully.吴京主演的电影攀登者，改编自1960年四位中国登山家的真实探险故事，他们也是全球首批成功从北坡登顶珠峰的人。知识点讲解51.1025 meters deep翻译：1025米深深的（形容词adj.）deeply修饰带有感情色彩的动词 dislike，hate，love，think深地（副词adv.）表示具体深度Mike take a breath，and began the first try.麦克做了一次深呼吸并开始了他的第一次尝试。Dig the hole please！请把洞挖深点。He was（）moved by the story.他

3、被这个故事深深地感动了。deep-deeper-deepest知识点讲解6形状特征，用“基数词+单位名词+形容词”The river is 50 meters wide.这条河50米宽。造句：我表弟1.75米高。拓展：基数词+单位名词+形容词往往构成复合形容词，每个词之间用“-”连接。a six-year-old boya two-meter-long table这里的单位名词不能用复数，而是用单数知识点讲解-真题演练7Among the four seas off the coast of China，East China sea is the second（C）A.deep B.deepe

4、rC.deepeat D.the deepest“the+序数词+形容词最高级”表示第几(大，长，深等)，题目中的second为序数词人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）知识点讲解82.China has the biggest population in the world（n.）人口 常用big/large或small修饰 询问人口多少用what提问 (疑问词+be)the population of your city？the population of this town is （large）than that o

5、f our townWhat islarger人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）知识点讲解93.Feel free to ask me anything on todays Great Wall tour.关于今天的长城之旅，请随意向我提问吧feel free to ask（表示允许）可以随便做某事Feel free to ask question if you dont understand.翻译：Can I use your phone？可以借你电话一用-Feel free.随便用吧人教版八年级下册 unit7知识点

6、讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）知识点讲解103.Feel free to ask me anything on todays Great Wall tour.关于今天的长城之旅，请随意向我提问吧tour（n.）旅行，旅游tourist（n.）游客，观光者every year，（tour）from home and abroad visit places of interest，taste delicious food and enjoy themselves in Xiamen.tourists人教版八年级下册 unit7知识点讲解（PPT58张）人

7、教版八年级下册 unit7知识点讲解（PPT58张）知识点讲解114.The main reason was to protect their part of the country.主要原因是保卫自己的国家protect（V.）保护 常构成动词短语：protect from（=keep from）Wearing dark galsses can protect your eyes from the sun.戴墨镜可以保护眼睛不受伤害人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）知识点讲解124.The main reason wa

8、s.主要原因是保卫自己的国家句子分析：动词不定式短语做表语My dream is to（作文可用句式）小红莓乐队DREAM人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）知识点讲解13as正如（连词.）连接从句中的谓语动词往往是see，know，expect。eg：As we all know，the Pacific is the largest ocean in the world.正如我们所知道，太平洋是世界上最大的海洋 As everyone expected，we won the game 翻译：5.As you can se

9、e，its quite tall and wide.正如你所见，它又高又宽。人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）As的用法14连词介词as作为，当做As a student，I must follow the school rules.像，按照，引导方式状语从句连词当的时候。引导时间状语从句You must do everything as I ask you to.She sings as she walks.她边走边唱。人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT

10、58张）知识点讲解15as正如（连词.）连接从句中的谓语动词往往是see，know，expect。eg：As we all know，the Pacific is the largest ocean in the world.正如我们所知道，太平洋是世界上最大的海洋 As everyone expected，we won the game 翻译：5.As you can see，its quite tall and wide.正如你所见，它又高又宽。人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）知识点讲解16as far as 就而

11、言；据eg：As far as I know，this is highly unlikely.就我所知，那是极其不可能的。正如我们所知道，太平洋是世界上最大的海洋 As far as I can see，there are no mistakes 依我看，没什么差错6.As far as I know，there are no man-made objects as big as this.据我所知，还没有和这个一样大的人造物体了。As far as I know人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）知识点讲解17inclu

12、de（V.）包括，包含 including（介词）包括eg：A good British breakfast always includes sausages一顿丰富的英式早餐往往会包含香肠Many middle school students like reading Harry Potter，including me大部分中学生喜欢读哈利破特，包括我在内7.Even more serious difficulties include freezing weather condition and heavy stormsge.更严重的困难是冰冻天气以及强烈的暴风雪。人教版八年级下册 unit

13、7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）知识点讲解18freeze（V.）结冰，冷冻 freezing（adj.）冰冻的，结冰的eg：Water （freeze）at zero degree水在零摄氏度结冰。I am （freeze）！我快冻僵了7.Even more serious difficulties include freezing weather condition and heavy stormsge.更严重的困难是冰冻天气以及强烈的暴风雪。人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PP

14、T58张）知识点讲解19condition（n.）条件，状况 eg：His living condition are not good.他们是生活状况不容乐观7.Even more serious difficulties include freezing weather condition and heavy stormsge.更严重的困难是冰冻天气以及强烈的暴风雪。人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）知识点讲解20take in 1.吸入，吞入（体内）2.理解，领会3.收留 He was homeless，so we

15、took him in.他无家可归，我收留了他During the whole class，I didnt take anything in.在一整节课中，我什么也没学会。8.Its also very hard to take in air as you get near the top.当你接近山顶时，你还会感到呼吸非常困难。人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）知识点讲解21句子分析：to reach the top作为定语修饰前面的people。补充：动词不定式作为定语必须后置eg：The next train to

16、 arrive was from Xiamen下一列到站的火车是从厦门开来的It was a game to remember.那是一场令人难忘的比赛9.The first people to reach the top were Tenzing N orgay and Edmund Hillary on May 29,1953.第一个登顶的是旦增.诺尔盖和埃德蒙.希拉里，在1953年5月29日人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）知识点讲解22句子分析：连词while连接并列句，while意为然而，前后句子形成对比关系eg

17、：Some are rich while others are poor有些人富有，然而有些人贫穷。10.The first Chinese team did so in1960，while the first woman to succeed was Junko Tabei from Japan in 1975.第一支中国登山队在1960年完成了这一壮举，而1975年登顶的日本人田部井淳子成为第一个成功登顶的女性寄生虫（parasite2019）人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）success成功23132succes

18、s（n.）成功，成就 一般不可数名词，但指成功的人或事物可数successful（adj.）成功的succeed（v.）成功No one can （success）without any hard work人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）知识点讲解24挑战 （V.）eg:He challenged me toanother game of chess.他向我挑战再下一盘棋（n.）This is a job with enough challenge.这是一个很有挑战性的工作in face of 面对 eg：He is

19、very brave in face of danger.在面对困难时他很勇敢11.One of the main reason is because people want to challenge themselves in face of difficulties.一个主要的原因是人们想在困难面前挑战自我。人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）知识点讲解25 （Vt.）达成，完成，实现 eg:With courage one can achieve anything.只要有勇气，无事不可成。12.The spirit

20、of these climbers shows us that we should never give up trying to achieve our dream.这些登山者的精神告诉我们：永远不要放弃尝试实现我们的梦想！同义句转换Work hard，and you can make your dream come true.Work hard，and you can (人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）知识点讲解26even through=even if 即使，虽然，引导让步状语从句。13.Why do so m

21、any people try to climb this mountain even through it is dangerous？虽然很危险，为什么这么多人想攀登这座山峰。eg：Theyll stand by you even if you dont succeed.即使你不成功，他们也会支持你。人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）Grammar Focus重点句型理解271.Whats the highest mountain in the world？Qomolangma2.How high is Qomolang

22、ma?Its 8,844.43 meters high.Its higher than any other mountain3.Which is Sea is the deepest of all the salt lakes is Caspian Sea.The Caspian Sea is the deepest of all the salt lakes.4.Did you know that China is one of the oldest countries in the world?Yes,I did.Its much older than the US.人教版八年级下册 un

23、it7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）Section B28知识点讲解2谈论自然1.写作技巧3人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）灭绝动物29We should protect the animals in danger！2019年12月23日，中国科学家在国际学术期刊整体环境科学发表的一篇论文说，地球上最大的淡水鱼之一、中国特有物种长江白鲟已经灭绝。结论其实延迟了10多年。根据这些科学家多年研究的结果，长江白鲟的灭绝时间应在2005-2010年之间。人教版八年级下册 uni

24、t7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）Panda！胖达30人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）知识点讲解311.weighs 5,000 kilos.重5000公斤。教材 P53 1aweighs作动词，意为“重;称的重量”。拓展 weight n.重量The baby weighs three kilos.这个婴儿3公斤重。The shopkeeper weighed the tomatoes.售货员把西红柿称了一下。常用短语：lose weight 减肥反义词 gain w

25、eight 增重人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）随堂演练32用所给单词的适当形式填空。1.An adult elephant (weigh)as much as 60 people.2.Dick decided to lose （weigh)by eating less and doing more exercise.答案 1.weighs 2.weight拓展：high 高的（形容词）height 高度，身高（名词）long 长的（形容词）length长度（名词）人教版八年级下册 unit7知识点讲解（PPT58张）

26、人教版八年级下册 unit7知识点讲解（PPT58张）知识点讲解2.At birth,a baby panda is about to kilos.刚出生时，熊猫宝宝体重约到公斤。教材P53 1cat birth 意为“出生时”，在句中常作时间状语。Their son weighed eight pounds at birth.他们的儿子生下来有8磅重。At birth,he was thin and weak.刚出生的时候，他很瘦弱。随堂演练同义句转换No one liked him when he was born.He was not welcome（）.他刚出生的时候，没有人喜欢他。a

27、t birth人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）知识点讲解3.A panda can live up to to years.大熊猫能活 到 年。教材P53 1cup to用在数字之前，意为“多达，高达”。The boss pays him up to 5,000 yuan every month,老板每月给他的薪酬能达到5000元。There are up to 2,000 students in our school.我校学生多达2000名。拓展up to sb.意为“是某人的职责；由某人决定；胜任”。It is u

28、p to you to clean our classroom today.今天应由你打扫我们的教室。Its all up to you.一切取决于你人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）根据汉语提示完成句子1.我班学生多达100人。There are 100 students in our class.2.这次要花多长时间？这取决于他们。How long does it take?It to them.答案1.up to 2.is up to人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7

29、知识点讲解（PPT58张）知识点讲解4.An adult panda weighs many times more than a baby panda.一只成年大熊猫的体重是一只小熊猫的很多倍。教材P53 1d adult形容词，意为“成年的；成人的”。名词，意为“成年人”He spent his adult life in China.他在中国度过了成年时期。Tickets for adults are 20 yuan.成人票价为20元。many times more than 意为“是很多倍”，many times许多倍，time在这里作可数名词，意为“次数、倍数”。I watch TV

30、three times a week.我一周看三次电视。人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）知识点讲解many times 在此处修饰比较级 more.Bob weighs twice more than me.鲍勃的体重是我的两倍。随堂演练合并句子。An elephant eats 150 kilos of food a day.A panda eats 10 kilos of food a day.An elephant eats（）（）（）a panda a day.一头大象每天的食量是一只熊猫的15倍。答案 15

31、times more人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）知识点讲解5.It is 8.30 a.m.at the Chengdu Research Base.早上8:30在成都研究基地。教材 P54 2bresearch不可数名词，意为“研究；调查”，常与动词do,make和动词短carry out(进行）等搭配，表示“做或进行研究工作”，其后可接介词on,in,into,for等表示研究的内容。These scientists are busy with scientific research all year arou

32、nd.这些科学家们一年到头忙于科学研究工作。They are doing some research on the animal.他们正在对这种动物进行科学研究。人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）随堂演练根据汉语提示完成句子。宇航员将在上面生活并进行一些研究工作。Astronauts will live on it.research是不可数名词，经常与do/make搭配使用。答案do/make some research人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT5

33、8张）知识点讲解6.At 9:00 a.m.,they find that most of the babies are already awake hungry.到了早上9:00,他们发现大多数熊猫宝宝巳经醒来了并且饿了教材P54 2bawake形容词，“醒着的”，在句中作表语，对应词是asleep,意为“睡着的”I was awake at 10 oclock yesterday evening.昨天晚上10点钟我还醒着。Is the baby awake or asleep?婴儿醒了还是睡着了？人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（

34、PPT58张）注意：awake作定语时，放在所修饰词的后面，即作后置定语。There were many people awake at that time.当时很多人都醒了。拓展：wake动词，“醒来”；wake.up“把弄醒”。随堂演练He fell（）early last night，and he was（）early this morning.A.sleep;wake B.asleep;wakeC.asleep;awake D.sleep;awake点拨：awake在be动词之后作表诺。点拨fall asleep“入睡”，是固定短语。答案：C人教版八年级下册 unit7知识点讲解（PP

35、T58张）人教版八年级下册 unit7知识点讲解（PPT58张）知识点讲解 When the babies see the keepers，they run over with excitement and some of them even walk into their friends and fall over!当（熊猫）宝宝们见到饲养员时，它们兴奋地跑过来，有些甚至撞到同伴而摔倒了。（教材P54 2b）！1.run over意为“跑上前去；跑去”，其中 over用副词，表示“从的一到另一边；穿越”。She ran over to say hello,but I didnt recogn

36、ize her.她跑过来打招呼，但我没有认出她来。注意run over还可意为“压过去；碾过”。Last year,a bike ran over her and hurt her leg.去年一辆自行车从她身上过，伤了她的腿。人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）知识点讲解6.At 9:00 a.m.,they find that most of the babies are already awake hungry.到了早上9:00,他们发现大多数熊猫宝宝巳经醒来了并且饿了教材P54 2bawake形容词，“醒着的”，在

37、句中作表语，对应词是asleep,意为“睡着的”I was awake at 10 oclock yesterday evening.昨天晚上10点钟我还醒着。Is the baby awake or asleep?婴儿醒了还是睡着了？人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）知识点讲解excitement作不可数名词，意为“激动；兴奋”。He can hardly say any words becase of excitement.他激动得说不出话来。拓展 excited激动的；兴奋的（涉及的对象往往指人）exciting

38、令人激动的（描述物）比较：Skiing is more exciting than skating.滑雪比滑冰更刺激。He was excited to hear the news.他听到那消息很激动。人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）知识点讲解 fall over“跌倒”。Children often fall over while coming down the stairs.小孩子经常在下楼时摔倒。辨析fall over,fall down 与 fall off词语用法 fall over意为“跌倒”，强调“向前摔

39、倒”。fall down意为“倒下”，强调的是“滑倒”；掉下。fall down from=fall“从某处掉fall down下来”。fall off意为“跌落”，强调的是“从某处跌落；从某处掉下来”。人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）知识点讲解My brother fell over and hurt his legs.我弟弟跌倒并把腿摔伤了。The boy fell down and hurt badly.男孩滑倒了，伤得很重。The girl fell off the bike.女孩从自行车上掉了下来。随堂演练T

40、he old man his 3-wheel bike.But luckily,he didnt hurt himself.A.fell overB.fell offC.fell downD.fell tofall过去式 fell过去分词 fallen人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）知识点讲解8.Scientists say there are now fewer than 2,000 pandas living in the forests.科学家们说现在只有不到2000只大熊猫生活在森林里。教材P54 21）The

41、re be+名词（短语）v.-ing意为“某处有某人或某物在做某事”短语living.作后置定语，修饰pandas.There is a truck collecting rubbish outside.外面有一辆卡车正在收垃圾随堂演练There are some boysbasketballoverthere.Lets go and join them.A.are playing B.playing C.to play人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）知识点讲解9.The babies often die from i

42、llness.熊猫宝宝经常死于疾病。教材P54 2bdie from“死于(某种原因）”。Few people died from the earthquake because the government took action in time.因为政府及时采取行动，所以没有多少人死于这次地震。辨析die from 与 die of词语用法die from“死于”，主要指事故等方面的外部原因。In old days,many people died from hunger and cold.在旧社会，很多人死于饥饿和严寒。die of“死于”，主要指疾病，衰老等自身的原因。It is sai

43、d that the old man died of heart trouble.病、据说老人是死于心脏疾病。人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）知识点讲解随堂演练He died traffic accident last week.A.Of B.from C.with D.forillness名词，“疾病”。He still smiles in the face of illness.在疾病面前他依然微笑。形容词ill加后缀ness构成名词，类似的名词还有很多。例如。拓展kind(善良的）kindness(善良）happ

44、y(幸福的）happiness(幸福）B人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）知识点讲解10.huge adj.大的；极多的教材P55 3ahuge形容词，可在句中作表语或定语。An elephant is huge.大象的体形很庞大。辨析huge,large,big 与 great词语用法例句“huge”巨大的”，强调尺寸而非重量。Its leaves can be made into a huge fan.它的叶子能被制作成巨大的扇子。large“大的”，多指面积范围大。The South China Sea is la

45、rge and beautiful.中国的南海面积广大且非常美丽。big“大的”，多指体积大，还表示年龄大。Do you know the big boy?你认识那个大男孩吗？人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）知识点讲解great抽象的意义，一般指“伟大的；重大的”Tu Youyou is a great scientist.屠呦呦是一位伟大的科学家。随堂演练1.She is enough to ride a bike.(big/great)2.He caught a whale.(huge/large)人教版八年级下册

46、 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）形容词、副词的比较级和最高级人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）形容词、副词的比较级和最高级的构成单音节词和部分双音节词一般在词尾加er,-est.short-shorter-shortestfast-faster-fastest以不发音的字母e结尾的词加r,-st.nice-nicer-nicest fine-finer-finestlate-later-latest以重读闭音节结尾，且词尾只有一个辅音字母的形容词或副词，应该先双

47、写该辅音字母，然后再加er,-est.big-bigger-biggestthin-thinner-thinnestfat-fatter-fattest以“辅音字母十y”结尾的双音节词，应该先把y变为i，再加er,-est.easy-easier-easiestfunny-funnier-funniestearly-earlier-earliest多音节词和部分双音节词在词前加 more,most若否定，前面加 less，least.popular-more popular-most popularinteresting-more interesting-most interestingcar

48、efully-more carefully-most carefully不规则变化good/well-better best bad/ill/badly-worse worst many much-more mostfar-farther farthest/further furthest little-less-least old-older oldest/elder eldest人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）比较等级之间的转换1.原级与比较级之间的转换，可用“less+原级十than”替换“not so/as十原

49、级”。Hot dogs are not so delicious as sandwiches.Hot dogs are less delicious than sandwiches.热狗不如三明治好吃。2.比较级之间的转换。常改变比较对象的位置并使用反义词。例如：My sister is three years older than I.我姐姐比我大3岁。I am three years younger than my sister.我比姐姐小3岁。人教版八年级下册 unit7知识点讲解（PPT58张）人教版八年级下册 unit7知识点讲解（PPT58张）553.最高级与比较级之间的转换。（1

50、)用“比较级than+any other+名词单数”。Tom runs fastest in his class.汤姆在他班里跑得最快。Tom runs faster than any other student his class汤姆比他班里其他任何同学跑得都快（2)用“比较级+than+all the(other)+名词复数或 any of the(other.)名词复数”。注意：当主语在比较的范围内时用other,当王语不在比较的范国时，不用other.例如：She is the most beautiful girl in the school.她在学校是最漂亮的女孩。She is m