2017年人教版初中英语八年级英语下册全套课本同步重难点精讲

1、精选优质文档-倾情为你奉上2017年人教版初中英语八年级英语全套课本同步重难点精讲Unit 7 Whats the highest mountain in the world?课文重难点讲解Section A1. about 9,600 ,000 square kilometers in size. 大小约9,6000,0000平方公里。【解析1】square adj. “平方米” , 用于数字后表面积。an area of 95 square meters 95平方米的面积 n , 正方形；广场Many old people like dancing on the square after

2、supper.【解析2】in size = have /has an area of. （面积）大小2. 1，025 meters deep 深1，025米【解析1】1,025 meters “深1,025米”【注】在英语中，表示事物的长、宽、高、深等时，主要有两种表达方式：结构1：“基数词 + 单位名词+ 形容词（long,wide,tall, deep等）”。如果数词超过1，单位名词要用复数形式。【注】单位词有： meter; foot; inch; kilogram 等 Yao Ming is over 2 meters tall. The river is 50 meters wide

3、. “基数词+ 单位名词+ in + 名词（length; width; height; depth等） two meters long = two meters in length 2米长 three feet high = two feet in height. 3英尺高结构2： 长、宽、高、深还可用复合形容词表示 “数字+ 量词（单位）+形容词（long/ wide/ tall/ deep等）” . 各个词间用连字符连接，常作前置定语修饰名词。Jeremy Shu-How Lin is a 1.91-meter-tall- basketball player.【解析2】deep adj.

4、 深的 take a deep breath.深深呼吸【拓展】 adj n deep depth long length high height wide width 3. Qomolangma is _ than any other mountain in the world.珠穆朗玛峰比世界上任何山都_.【解析】 “any other +可数名词的单数” 任何其他的【用法1】any other “其他任何一个” ,后接可数名词单数，指在同一范围内除了某人或某物以外的其他任何人或物通常用于比较级，多用于同一范围内相比较。 Shanghai is bigger than any other c

5、ity in China.【用法2】 “any other +可数名词单数” 可与 “the other + 可数名词复”互换，也可用最高级形式表达。Lucy is more careful than any other student in her class. (any other + 可数名词单数）=Lucy is more careful than the other students in her class. (the other + 名词复数）= Lucy is the most careful student in her class.4. Its a lot bigger t

6、han the population of the US. （中国）人口比美国多对多。【解析1】a lot .得多；很多；非常【辨析】(1) a lot 很多，做副词短语，修饰动词，放在动词之后。相当于very much. It usually rains a lot at this time of year. (2)a lot of = lots of + 复数名词 =many +复数名词=much+ 不可数名词【解析2】 population 人口；人口数量population常与the连用,做主语且强度整体人口时，谓语动词一般用单数，The population is increasin

7、g faster and faster. 当主语时“人口的百分之几、几分之几”时，谓语动词常用复数形式。 Three quarters of the population are workers. 表示人口的"多"或"少"时, 用"large"或"small"The population of China is very large. 中国人口众多( ) The population of the town is much _ than that of your town. A. less B. fewer C.

8、smaller 询问某国、某地有多少人口时, 用"How large.?"How large is the population of your hometown? 你们家乡有多少人口? 提问有多少人口，常用“ what is the population of ?” What is the population of Canada? 加拿大的人口有多少? 表示 “某地有多少人口” 时，常用1）The population of 某地be数词（该句型中population前用冠词the。）2）某地has a population of 数词（people）（该句型中popu

9、lation前用冠词a。）例如：The population of China is about 13 billionChina has a population of about 1.3 billion中国大约有13亿人口。5. It has a much longer history than the US. （中国）比美国历史长得多。【解析】much 得多 （修饰比较级）类似的词还有：even “更.” , a lot “很多；.得多” a little “比.一点”My classroom is a little bigger than yours.6. The US is not e

10、ven years old. 美国的历史甚至不到_ 年。【解析】even 甚至 (用在比较级前，表示程度）【2012山东济宁】In the talent show, I performed well and Ann did even _B_. A. well B .better C. more D. worse7. Feel free to ask me anything on todays Great Wall tour.针对今天的长城之旅，大家可以自由提问我任何问题。【解析】 tour n 旅行 tourist n 旅游者 touristy adj. 游客很多的.tour guide 导游

11、My brother wants to be a _(tourist) v 旅行 traveller n 旅游者 travelling adj. 旅行的travel to 到旅行 travel all over the world. 周游世界【辨析】tour/ trip/ travel/ journey 词语用法travel一般指长途旅行，到国外或远方旅行。travel 还可作动词tour“旅行，周游，观光” .一般团队都是tourtrip一般指短距离旅行，直达目的地的旅行journey有时并不指真正意义的“旅行”， 而只是表示走过一段距离。【记】 观光游玩用tour

12、 ，长途陆路用journey， 短途短期用trip，travel 用法最普遍，特别用于指“游记”8. How long is the wall? 长城有多长？【解析】how long 多长；多久 对长度提问 How long is the table? About 1.2 meters. 对时间提问，常用for或since引导的时间状语来回答。 How long does it take you to do your homework in the evening? For two hours.9.The main reason was to protect their part of the

13、 country. 主要的原因是保卫自己的国家。【解析】 protect v “保护” We should protect tect sb./ sth from 保护某人/ 某物使其不受Protect your eyes from the sun. 不要让阳光伤害你的眼睛。10. As you can see , its quite tall and wide. 正如你所看到的， 长城非常高，也非常宽广。【解析】as conj.像一样，正如 （用来引导状语从句） I was surprised as he opened the door. prep. 作为11. As

14、far as I know, there are no man-made objects as big as this. 据我所知，没有任何一个人造物有长城这么长。【解析】as far as I know据我所知 as far as “就.来说，至于.” , 引导状语从句，强调范围或程度，常与动词know, see,等连用，可放在句首或句中。【记】as far as I can remember 据我所记得的as far as I can see 依我所见12. One of the words most dangerous sports is mountain climbing,登山是世界上

15、最危险的运动之一。【解析】one of + the adj. 最高级 + 可数名词复数13 Of all the mountains , Qomolangma rises the highest and is the most famous.在所有的山峰中， 珠穆朗玛峰最高，最有名。【解析】famous = well- know adj. 著名的， 有名的(1) be famous for 因而著名 （某人因某种知识、技能或特征而出名） China is famous for the Great Wall and Pandas(2) be famous as 作为.而出名 （某人以某种身份而出

16、名） Lu Xun was famous as a writer.14.Even more serious difficulties include freezing weather conditions and heavy storms. （比这） 更严重的困难包括冰冻的天气条件和强烈的暴风雨。【解析1】include 包括；包含 include v 包括 including prep 包括（放在被包括的对象之前）【解析2】freezing adj. 冻冰的；结冰的freezing adj. 冻冰的，结冰的freeze v Today it is freezing cold.frozen a

17、dj. 冻结的，被冰覆盖的 I dont like frozen food.【解析3】condition 条件；状况 out of condition 不健康，身体不好； in good condition 情况良好；完好15.It is also very hard to take in air as you get near the top. 并且越接近顶部呼吸越困难。【解析】take in 吸入； 吞入（体内）take after（外貌）相像 take away 拿开 take down 写下，记下take in吸收，吸纳 take off 起飞；脱下take it easy 别紧张ta

18、ke to 喜欢，开始从事 take pictures照相 take care of 照顾，照料16. The first Chinese team did so in 1960 , while the first woman to succeed was Junko Tabei from Japan in 1975. 1960年第一支中国登山队登上了顶峰，1975年日本的田部井淳子成为第一个成功登上顶峰的女子。【解析1】while conj. 然而 (连接并列句） He is a worker while I am a doctor. conj . 当.的时候，（引导时间状语从句） Whil

19、e I was doing my homework ,my mother came in .【解析2】succeed v 成功，达到 success n 成功successful adj. 成功的successfully adv成功地 succeed in doing sth 成功地做某事17.Why do so many climbers risk their lives? 为什么这么多登山者愿意冒生命危险？【解析】risk ones life to do sth 某人舍命做某事 There is a risk of sth/ doing sth 有（做）某事的危险 take risks 冒

20、险18.One of the main reasons is because people want to challenge themselves in the face of difficulties. 最主要的原因之一是因为人们在面临困难的时候想挑战自我。【解析1】challenge v/n 挑战face a challenge 面临挑战challenge sb. to sth向某人挑战 He challenged me to a race.他向我挑战赛跑。challenge sb. to do sth 向某人挑战【解析2】in the face of 面对（问题、困难等）They sh

21、owed courage in the face of danger. 面对危险他们表现出了勇气。19.The spirit of these climbers shows us that we should never give up trying to achieve our dreams. 这些登山者的精神告诉我们， 我们应该从不放弃实现自己的梦想。 【解析】achieve v 获得；达到； 实现 achievement n 完成； 成绩achieve ones dream = ones dream comes true实现某人的梦想词条是否接宾语用法achieve是主语一般为“人”co

22、me true否主语一般是“梦想；理想”20. It also shows that humans can sometimes be stronger than the forces of nature.它还告诉我们， 人类有时候比自然的力量更强大。【解析1】human n 人；人类 No human could live like this .没有人能这样生活。【解析2】force n 力量； the forces of .的力量 The force of human is great. V. 迫使；强迫 force sb. to do sth 强迫某人做某事 Nobody can forc

23、e me to do something.【解析3】nature 不可数名词 “自然界；大自然” natural adj. 自然地 in nature 在自然界中Section B- Self Check1. The elephant weights many times more than this panda. 这头大象的重量是这只熊猫的很多倍。【解析1】weigh v 称的重量 weight n 重量【记】 She weighs herself every day and wants to lose weight.【解析2】time “是.的几倍”主语 + 数词 + times + as

24、 +形容词+ as +被比较的内容Our new school is four times as big as the old one. “次数” 一次 once 两次 twice 三次及三次以上 ： 基数词 + times three times 三次 three or four times 三到四次【短语】many times 很多倍 last time (在)上次时 every time 每次/每回 each time 每当时 the first time 第一次时 next time (当)下次时 【句型 】  Its time for

25、 sth . 或 Its time ( for sb . ) to do sth . 意为：该是的时候了   Its time for dinner . 该是吃晚餐的时候了。   Its time for children to go to bed .

26、0;是小孩睡觉的时候了。2.At birth, a baby panda is about _ to _ kilos. 刚出生的小熊猫幼崽约_到 _公斤。【解析】at birth 出生时 （用作时间状语） give birth ( to sb/ sth) 生孩子；产仔3. A panda can live up to _ to _ years. 一只熊猫活_ 年到_ 年【解析】up to 高达 up to +数量词 达到 （某数量、程度等）；至多 I can take up to four people in my car. 直到 （现在）Up to now , Tony has been v

27、ery quiet. be up to sb. “由某人决定” Shall we go out or stay in ? Its up to you.4. Lin Wei and the other panda keepers are preparing the milk for the baby pandas breakfast. 林微和其他熊猫饲养员们正在给熊猫幼崽准备牛奶作为早餐。【解析1】the other 其他的 （指两个事物或两个人中的“另一个”， 后接名词时，表示“其他的人或物”；one. the other . （两者中）一个.， 另一个.the others=the othe

28、r +复数名词the other的复数形式是the others “其他东西，其余的人”。特指某一范围内的“其他的（人或物）”。Two boys will go to the zoo, and the others will stay at home. 两个男孩将去动物园，其余的留在家里。 【解析2】preparefor 为准备1). prepare sth.表示"准备."，后接名词或代词作宾语。Our English teacher was preparing the lessons when I came into the office. 我进办公室时，我们的英语老师在

29、备课。2). prepare to do sth.表示"准备做."。They were preparing to cross the river when it began to rain. 他们正准备过河，突然下雨了。3). prepare for sth.表示"为.做准备"。The students are busy preparing for the final exam.学生们正在准备期末考试5. At 9:00 a.m, they find that most of the babies are already awake and hungry

30、.上午9:00的时候，他们发现大部分熊猫幼崽已经醒来并且饿了。【解析】awake adj. 醒来 （反义词）asleep 睡着的 She was awak all night.V. 唤醒；使醒来 = wake up The noise awak me. 6. When the babies see the keepers, they run over with excitement and some of them even walk into their friends and fall down! 当熊猫幼崽们看到饲养员时便激动地跑了过来，有些甚至撞倒它们的伙伴，绊倒在地！【解析1】run

31、 over 撞倒 run ran run running     runner 赛跑的人【短语】run after 追逐,追求  run away from 从跑掉;逃避  run out (某物)被用完  run out of 用完(某物)  run into 无意间碰到,和相撞  【解析2】excitement 激动；兴奋exciting 形容词，表示"

32、令人兴奋的；使人激动的"，指人、事、物本身让人兴奋、激动 He told us an exciting story yesterday.excited 形容词，表示"兴奋的"，指人、物对.感到兴奋，是（主动地感到）兴奋的excite v "(使)兴奋" excitement n 激动；兴奋 Are you excited about going to Beijing?  be excited ab

33、out 对感到激动 to ones excitement 使某人兴奋的是【解析3】fall down 跌倒fall “落下，跌落，降落”，指在重力的作用下落下，或失去平衡而跌落The leaves fall in the autumn.fall down强调的是“滑倒、倒下”，后接宾语时应加上介词fromThe book fell down from the table to the floor. 【短语】 fall down 倒下 fall over 落在.之上, 脸朝下跌倒 fall off 下降, 跌落 fall over“向前摔倒、跌倒”。7. The baby often die f

34、rom illness and do not live very long. 熊猫幼崽常死于疾病，并且活不久。【解析1】die v. （延续性动词） be dead 死，死亡 death n. 死，死亡dead adj. 死的 【拓展】die from 死于die v“死”表示生命的结束 dead adj 死的death n 死亡 常用短语 die from + 外因 “死于”，主要指事故等方面的外部原因。die from a traffic accident 死于交通事故 The old man died from a car accident last year. 这个老人去年死于一场车祸

35、2 die of + 内因 主要指疾病、衰老、情感等自身原因die of hunger/an illness 饿/病死 His grandfather died of liver cancer in 1992. die out“（家族、物种等）灭绝；绝迹 Dinosaurs died out 65 million years ago. 恐龙在六千五百万年前灭绝了【解析2】illness 疾病；病ill /sick 共同点："生病的；有病的" 不同点：ill adj."生病的；有病的"作表语，不能作定语 be ill in hospital sick 作表

36、语/作定语，"病人"a sick man 或the sick,She is ill / sick in bed. 她卧病在床。She is looking after her sick father .她在照顾她生病的父亲。【拓展】sick "恶心的；厌倦的" The smell makes me sick.这气味使我感到恶心。8. Adult pandas spend more than 12 hours a day eating about 10 kilos of bamboo.成年熊猫每天花12个小时来吃掉大约10公斤的竹子。【解析】spend (

37、in) doing 花时间做某事【】spend/pay/cost/take 花费(1)spendspentspent v 花费,主语是人 sb.+ spend +时间/钱+on sth sb. +spend +时间/钱+（in） doing sthspend on= pay for 支付He spends too much time on the computer games. (2) pay paid paid v 支付，主语是人 sb.+ pay + 钱+for sth I pay 10 yuan for the book. (3) cost cost cost v 花费，主语是某物或某事

38、 sth cost sb. +钱 某物花费某人多少钱 A new computer costs me a lot of money. (4)taketook taken v 花费It takes /took sb. some time to do sth. 做某事花费某人多长时间It takes him 3 hours to do his homework.9. But then humans started to cut down the forests, and there was less bamboo for the pandas. 但是后来人类开始砍伐森林，导致可供熊猫吃的竹子越来越

39、少。【解析1】cut down 砍伐；砍倒cut down 砍倒，减少，降低，缩短 The little boy cut down the young tree 【拓展】与cut有关的短语cut something from something 切下，割下cut something away 切除，剪去cut up 切碎 cut off切断，停止【解析2】less 更少的less是little（小；少）的比较级： He spends less time (in) doing experiments. 他做实验花时间较少。“less+形容词或副词”构成劣等比较，作“较不”，“更不”解。 It i

40、s less cold than it was yesterday. 天气不如昨天那样冷。【拓展】not less than + 基数词表示"不下于；至少；不止"no less than + 基数词表示"达.之多（言其多）" There are not less than 40 students in this class. 这个班级至少有40个学生。 No less than 1,000 people were missing in the earthquake. 地震中失踪人数多达一千人。 10. Scientists say there are n

41、ow fewer than 2000 pandas living in the remaining forests. 科学家们说现在只有不到2000只大熊猫生活在幸存的森林中了。【解析】 There be + 名词（短语） + ving. 某处有某人或某物在做某事There is a truck collecting rubbish outside.【解析】remind v保持，仍是（系动词+adj. ）11. Another 200 or so live in zoos or research centers in China and other countries.另外的200 只左右生存

42、在动物园或中国和其他国家的研究中心。【解析】another +数词 另外的, 再another 同类事物（三个以上）的另一个， I don't like this one, please show me another. 我不喜欢这个,请给我另一个。 some. others一些，另一些Some boys are reading; others are listening to the radio. 有些孩子在阅读,有些则在听收音机。 one . the other 表示两者里面的另一个！ I've bought two sweaters . One is for you an

43、d the other is for my brother. other+复数名词Where are the other students? 其他同学在哪里?12. We all hope that in the future there will be a lot more pandas than now.【解析】there be句型的将来时【2013铜仁】Theres going to _ an English evening tonight? Would you like to go with us? Id love to. A. have B. has C. is D. be13. A

44、nother reason for fewer and fewer pandas is because people are cutting down forests so pandas have fewer places to live and less bamboo to eat.熊猫越来越少的另外一个原因是因为人们砍伐森林，所以可供熊猫居住的地方越来越小，可供其吃的竹子也越来越少。【解析】比较级 +and +比较级 越来越【2013辽宁鞍山1】After rebuilding, our school is becoming _.A. more and more beautiful B.

45、more beautiful and beautifulC. beautiful and beautiful D. the more beautiful专心-专注-专业单元短语一、重点短语1. as big as 与一样大2. one of the oldest countries 最古老的国家之一3. feel free to do sth. 随意地做某事 feel free to ask sb. sth. on 就随意问某人某事4. as far as I know 据我所知5. man-made objects 人造物体 6. part o f. . 的组成部分7. the highes

46、t mountain 最高的山脉 8. in the world 在世界上9. any other+名词单数 其他任何一个.any other mountain 其他任何一座山10. of all the salt lakes 在所有的咸水湖中11. run along 跨越 12. freezing weather 冰冻的天气13. take in air 呼吸空气14. the first people to do sth. 第一个做某事的人15. in the face of difficulties 面临危险16. give up doing sth. 放弃做某事 17. achiev

47、e ones dream 实现某人的梦想18. the forces of nature 自然界的力量19. reach the top 到达顶峰 20. even though 虽然;尽管21. at birth 在出生的时候 22. be awake 醒着23. run over with excitement 兴奋地跑过去24. walk into sb. 撞到某人 25. fall over 摔倒26. take care of 照顾;照料 27. every two years每两年28. cut down the forests 砍伐林木 29. endangered animal

48、s 濒危动物30. fewer and fewer pandas 大熊猫越来越少31. be in danger 处于危险之中32. the importance of saving these animals拯救这些动物的重要性33.as you can see 正如你看到的 34.up to 直到35.prepare for为准备 36.die from 死于 37. or so 大约，左右 38.in the future 将来 39.protect from/against保护使不受，防御40.succeed in doing sth. 成功做某事41.there be sb./sth

49、. doing有某人/某物正在做某事42.teach sb. about sth. 教某人有关内容43.send sb.to do sth. 派某人去做某事二、重点句型1. It is -adj. + (for sb. ) to do sth.It is also very hard to take in air as you get near the top.当你接近山顶时，连呼吸都会困难。2. . . . is because.One of the main reasons is because people want to challenge themselves in the face

50、 of difficulties.其中的一个主要的原因是人们想要在面临困难时挑战自己。3. . . . show(s) that.The spirit of these climbers shows us that we should never give up trying to achieve our dreams.这些登山者的精神向我们证明：我们永远都不应该放弃实现自己的梦想。4. How high/ deep/. . . is . ?How high is Qomolangma?珠穆朗玛峰有多高？5. Although. “ ，Although Japan is older than Canada，it is much sm