Unit7八年级英语下册精品课件（人教版）

这是一份Unit7八年级英语下册精品课件（人教版），共56页。PPT课件主要包含了内 容 提 要等内容，欢迎下载使用。
1.词 组 记 忆
2.考 点 过 关
3.语 法 突 破
4.写 作 训 练
1. （可以）随便（做某事) ______________________ 2. 就我所知____________________________________ 3. 吸入，吞入_________________________________ 4.面对（问题，困难） _________________________ 5. 即使，虽然__________________________________ 6. 出生时___________________________ 7. 到达（某数量，程度），不多于________________ 8. 走路时撞到__________________________________ 9. 绊倒_________________________________________ 10.大约 ________________________________________
.as far as I knw
.in the face f
.even thugh
考点1. Qmlangma is higher than any ther muntain in the wrld. 珠穆朗玛峰比世界上其他任何一座山都高。
【解析】higher than any ther muntain比其他任何山都高，any指任何一个，后接单数名词。这种比较级形式可以替换为最高级形式，即：形容词比较级+than any ther+单数名词=最高级+单数名词。原句相当于Qmlangma is the highest muntain in the wrld.。
e.g. Tm runs faster than any ther student in his class. 汤姆比他班上的任何人都跑得快。
This bk is mre difficult than any ther bk here.=________________________________________
This bk is the mst difficult bk here.
【拓展】表示最高级的结构还有：形容词比较级+than the ther + 复数名词。
【即学即练】—Everyne knws Canada is the secnd largest cuntry in the wrld.—That is, it is larger than ____________ cuntry in Asia.A. any B. any ther C. ther D. anther
Asia is bigger than the ther cntinents n the earth. 亚洲是地球上最大的洲。
考点2. China has the biggest ppulatin in the wrld. It’s a lt bigger than the ppulatin f the US. 中国是世界上人口最多的国家。它比美国人口要多得多。
【解析1】ppulatin作主语，表达一个整体概念时，谓语动词用单数，当其前有分数或百分数修饰时，谓语动词可用单数或复数。
The ppulatin f Nigeria is mre than 100 millin. (强调整体性) 尼日利亚的人口数量为1亿多。
（1）问人口数量的句型是：What’s the ppulatin
What’s the ppulatin f the wrld nw? 现在世界人口是多少？
（2）形容人口多少用big，large或small。
The city has a big/large/small ppulatin. 这个城市人口多/少。
【即学即练】1.The ppulatin f the wrld _______ still _______ nw. A. will；grw B. has；grwn C. is；grwing D. is；grwn 2.The ppulating f India is _____ than that f China. A.bigger B.smaller C.mre D.less
【解析2】a lt bigger大多了,bigger是比较级,前面用a lt修饰。a lt, a little, much, a bit, still, even, far等可以用来修饰形容词或副词的比较级,表示程度,起强调作用。
My rm is a little smaller than yurs.我的房间比你的稍小一点儿。
【即学即练】— Hw did yu find yur trip t Water Park in the summer f 2016?— I enjyed it. It was ________ than I expected. A. even much interestingB. far mre interesting C. s far interesting D. far frm interesting
【答案】B 【解析】考查形容词。根据后面的“than I expected”可知，此处运用比较级mre interesting，而far可以修饰比较级。
考点3. Did yu knw that China is ne f the ldest cuntries in the wrld? 你知道中国是世界上最古老的国家之一吗？
【解析1】该句含有由that引导的宾语从句，从句表示的是客观事实或真理，即使主句是过去时，从句也要用一般现在时。
He tld me that the sun rises in the east. 他告诉我太阳从东方升起。(客观事实)
【即学即练】My teacher tld me that light ____________ at high speed.A. traveledB. wuld travel C. travels
【解析2】本句中的ne f意为＂……中的一个＂或＂……之一＂，后面接复数名词，当名词前有形容词修饰且有比较范围时，形容词应用其最高级形式。
Sng Jie is ne f the tallest students in ur class. 宋杰是我们班最高的学生之一。
【注意】ne f ... 作主语时，谓语动词要用单数形式。
One f the girls is my sister. 这些女孩中有一个是我妹妹。
【即学即练】As we knw, the Yangtze River is ne f _____ rivers in the wrld.A. lng　 B. lnger C. Lngest D. the lngest
【答案】D【解析】本题用寻找题眼法。由句中＂ne f＂可知为＂ne f＋the＋形容词最高级＋可数名词复数＂结构。
考点4. Feel free t ask me anything n tday’s Great Wall tur. 关于今天的长城之旅，请随意向我提问。
feel free是英语口语中一个常用表达。feel free t d sth.表示＂无拘束做某事，按照自己的意愿去做某事＂。
If yu have any questins, please feel free t ask me. 如果有任何问题，请随意提问。
【即学即练】—Mary, can I use yur dictinary?—Yes, __________.A. enjy yurself B. feel free C.n way
考点5. The main reasn was t prtect their part f the cuntry. 主要原因是保护他们那部分的国土。
prtect v. 保护；防护。常用短语：
Peple build huses t prtect themselves against bad weather.人们建造房屋来抵御坏天气。
【即学即练】Sme steps have been taken t prtect the frest . A. frm being destryed B. frm destrying C.t destry D.t be destryed
考点6. As far as I knw, there are n ther man-made bjects as big as this. 据我所知，再没有其他像它这样大的人造物体了。
【解析1】as far as I knw是一个固定的表达方式，还可以说s far as I knw，意思是＂据我所知＂。
As far as I knw, he will be away fr three mnths. 据我所知，他将离开三个月。
as far as还可表示＂像……那样远；远到……＂，后跟名词或从句，强调至某一指明地点的距离。在否定句中，也可用s far as。
We went as far as Lin Rck Tunnel.我们一直走到狮子山隧道公路那儿。
【即学即练】—We will certainly enter a gd high schl ____ we wrk hard.—Yes. Our dream will cme true by wrking hard. A. as sn as　 B. as lng asC. as far as D. even if
【解析2】man-made人造的，为形容词性的合成词。类似的有：gd-lking相貌好看的；hard-wrking勤劳的；well-knwn著名的；fast-fd专门提供快餐服务的。
考点7. Even mre serius difficulties include freezing weather cnditins and heavy strms. 更加严峻你的困难包括极冷的天气状况和巨大的风暴。
【解析1】include为及物动词，其后可接名词或动名词，指在一个整体中包括了其中一部分内容或项目等，强调包含部分。
The price includes bth the huse and the furniture. 价钱包括房子和家具(的价格)。(接名词)
【即学即练】He tk an active part in all kinds f activities, i ____________ tennis, swimming, running and s n.
【答案】including
【解析2】cnditin名词，意为＂条件；状况＂，既可作可数名词，也可作不可数名词。
Everything is in gd cnditin. 一切状况良好。He is verweight and ut f cnditin. 他体重超重且健康状况不佳。
【即学即练】—The _______ f Xinjiang is peaceful, thugh many terrrists keep making truble.—I believe thse terrrists will fail in the end.A. cnditin B. situatin C. envirnment D. perfrmance
考点8. It is als very hard t take in air as yu get near the tp. 当你接近山顶的时候，你还会感到呼吸非常困难。
【解析1】“It is + adj.+ t d sth.”句型中It作形式主语放在句首,而把真正的主语放在句尾。常用于此句型的形容词有imprtant, difficult, dangerus, necessary, useful, pssible等,用来对t d sth.进行说明。此句型可以转换成“T d sth.is+adj.”。
It is imprtant t study English well.学好英语很重要。
It’s very difficult t climb Qmlangma.攀登珠穆朗玛峰很难。
【即学即练】____________ that she has been married fr a year. But n ne knws wh her husband is.A. It is said B. It says C. It believed D. It believes
【答案】A【解析】句意：据说她已经结婚一年了。但是没有一个人知道她丈夫是谁。固定句型：It is said that据说，因为it为形式主语，真正主语为that从句，it和say为被动关系，故答案为：A。
【解析2】as作连词，相当于when。as引导时间状语从句，作＂当……的时候＂解，有＂随着……＂之意，与while意义相近，强调两个动作同时发生，或某事一发生，另一事立即发生。
He shuted alud as he ran alng. 他一边往前跑，一边高声地呼喊。
I was startled as he pened the dr. 他一开门，我吓了一跳。
【即学即练】Li Lei isn’t ____________ Liu Ming. A. tall as B. as taller as C. as tall asD. as the taller as
考点9. ... while the first wman t succeed was Junk Tabei frm Japan in 1975. ……而来自日本的田部井淳子在1975年成为第一个成功的女登山者。
【解析1】succeed是不及物动词，意为＂实现目标；成功＂，不能用于被动语态。常用短语：succeed in ding sth. 成功做成某事；succeed in sth.在某方面获得成功。
—Culd yu tell me hw t succeed in making a speech in frnt f peple?
你能告诉我怎样在人们面前成功发表演讲吗？
(1)success n. 成功The party was a big success. 晚会非常成功。
(2)successful adj. 成功的I was successful in passing the math exam. 我成功地过了这次数学测验。
(3)successfully adv. 成功地
—What d yu think f the speech given by Chairman Xi Jinping in the UN?—It’s very exciting. His speech ____________ getting freign friends’ appreciatins. A. succeeded in　B. lked dwn C. gave up D. came abut
考点10.The spirit f these climbers shws us that we shuld never give up trying t achieve ur dreams. 这些登山者的精神向我们表明：我们绝不应该放弃实现我们梦想的尝试。
【解析1】give up 意为＂放弃＂，后面可以接名词、代词或动名词作宾语。如果宾语是名词，那么名词可以放在 give 和 up 之间，也可以放在 up 之后；如果宾语是代词，那么代词只能放在 give 和 up 之间。
My uncle wants t give up drinking wine. 我叔叔想戒酒。
【即学即练】Dn’t ____________ yur hpe and try again.A. give up B. lk up C. wake up D. make up
【解析2】achieve及物动词，意为＂达到；完成；成功＂，其宾语可以是＂实现＂的目标、目的等，也可以是＂取得＂的胜利、成功、名誉、地位等。
She achieved n success. 她没有获得成功。
注意：achieve表示＂实现＂时，与realize，cme true同义，但cme true为不及物动词短语，而另外两个均为及物动词。
He achieved/realized his dream. 他的梦想实现了。
At last, his dream came true. 最后，他实现了他的梦想。
【即学即练】He will never ____________ anything if he desn’t wrk hard.A. hpe B. wish C. achieve D. succeed
考点11. Why d s many peple try t climb this muntain even thugh it is dangerus? 为什么即使它很危险还有那么多的人尽力攀登这座山？
even thugh用作从属连词，意为＂即使；尽管＂，相当于even if，引导让步状语从句，不与并列连词but连用。even if的从句中含有强烈的假定性，even thugh则多以从句之内容为前提。
Even if yu dn’t succeed, they will stand by yu. 即使你们不成功，他们也会支持你们。
【即学即练】_____ Frank left schl at 16, he still became a successful writer. A. Ever since　　　 B. In fact C. After all D. Even thugh
考点12. This elephant weighs many times mre than this panda.这只大象比这只大熊猫重很多倍。
【解析1】weigh既可作及物动词，表＂称重＂，也可作连系动词，表＂有……重；重＂。
I weighed the bx. It weighs 20 kg. 我称了这个盒子，它重20公斤。
weigh的名词形式为weight。常用短语：in weight在体重方面。The by weighs 20 kg.＝The by is 20 kg in weight. 这个男孩重20公斤。
【即学即练】He ____________（weight）nly 70 kils nw after taking a balanced diet.
【解析2】time在此意为＂倍数，次数＂，表示三倍或三倍以上时使用。表示 ＂A 比B长（宽、高、大、重等）N倍＂时，其结构为＂A＋be＋基数词（N＋1）＋times＋形容词比较级＋than＋B ＂。
This hall is five times bigger than ur classrm. 这个大厅比我们的教室大四倍。
【即学即练】—I hear yu’ve bught a new huse.—Yes, it csts t much. Anyway, it’s ___________ my ld ne. A. twice as big as B. as twice big as C. bigger tw times than D. tw times bigger as
考点13.At birth, a baby panda is abut 0.1 t 0.2 kils. 出生时，一只大熊猫宝宝大约0.1到0.2千克重。
【解析】birth n. 出生;诞生。常见搭配：
【辨析】　brn/birth
(1) brn是bear的过去分词,意为“出生”,常用结构:sb.was/were brn。
I was brn in summer in 1988.我出生于1988年的夏天。
(2) birth是名词,意为“出生,诞生,分娩”,反义词是death,意为“死,死亡”。
She gave birth t a girl last night.她昨晚生了一个女孩。
考点14.Panda keepers are preparing milk fr the baby pandas’ breakfast. 大熊猫饲养员正在准备大熊猫宝宝的早餐牛奶。
【解析】prepare sth. fr sb./sth. 给……准备……。
She prepared a nice breakfast fr us. 她给我们准备了可口的早餐。
prepare fr＂为……做准备＂，fr后面的宾语是准备的对象。
The students are busy preparing fr the final exam. 学生们正在忙着准备期末考试
【即学即练】—Can yu g t the beach with me?—I’d lve t. But I have t _______________ tmrrw’s exam.A. lk fr B. ask fr C. prepare fr
考点15.they find that mst f the babies are already awake and hungry.他们发现大多数的大熊猫宝宝已经醒来并且饿了。
【解析】awake此处用作形容词，意为“醒着的”，它在句中常作表语。反义词是asleep。
Is he awake r asleep？他是醒着还是睡着了？
【辨析】awake与wake
awake形容词，意为“醒着”，常用作表语wake动词，意为“弄醒；醒”，常与副词up连用
It’s eleven at night. He is still awake. 夜里十一点了，他还没有睡。
Please wake me up at six in the mrning. 请早上六点叫醒我。
【即学即练】After wrking all night， Kate culdn’t stay____________the next mrning.（wake）
考点16.Sme kinds f whales are in danger. 一些种类的鲸处于危险之中。
【解析】in (great) danger处于(极度)危险之中，是主语本身处于危险之中，处于危险状况/危险处境，其反义词组为ut f danger＂脱离危险＂。
The ld man is in danger. 这位老人处于危险中。
danger-----_____________(形容词)
形容词、副词的比较等级
1. 形容词和副词的比较级与最高级的变化规则
farther/further
farthest/furthest
2. 形容词/副词原级的用法
（1）用于＂＂结构中，否定形式为nt 。
This picture is nt s gd as that ne. 这幅画不如那幅好。
【即学即练】Li Hua’s shes are as ________ as Zhang Hui’s.A. cheapB. cheaper C. the cheapest
（2）表示＂A是B的……倍＂时，用A＋谓语动词＋倍数＋as＋原级＋as B。
Our schl is twice as large as theirs. 我们学校是他们学校的两倍大。
（3）修饰形容词原级的词：very， t， s，enugh等。
The girl is s beautiful. 这个女孩是如此的漂亮。
3. 形容词/副词比较级的用法
（1）A＋谓语动词＋比较级＋than B... A比B……
My bike is mre beautiful than hers. 我的自行车比她的好看。
【即学即练】Peter is 15 years ld. He is _________ than his father. A. tall　　　B. taller C. tallest D. the tallest
【答案】B【解析】本题用寻找题眼法。由句中的than可知本空应用形容词的比较级形式。
（2）Which/Wh＋谓语动词＋比较级，A r B?
Wh runs faster, Jim r Tm? 谁跑得更快，吉姆还是汤姆？
【即学即练】—Which seasn d yu like__________ in Panzhihua, the dry seasn r rainy seasn?—The rainy seasn. A. well　 B. better　 C. best D. the best
（3）表示＂越来越……＂时用比较级的重叠结构，即＂比较级＋and＋比较级＂，多音节词和部分双音节词用＂mre and mre＋原级＂。
It’s becming clder and clder. 天气变得越来越冷了。
The prblem is becming mre and mre serius. 问题变得越来越严重了。
【即学即练】—Ry never likes junk fd.—Neither d I. That’s prbably why I’m becming _______nw.A. healthy and weak B. healthier and healthierC. weaker and weaker D. mre and mre healthily
（4）表示＂越……就越……＂时用＂the＋比较级，the＋比较级＂。
The mre careful yu are, the fewer mistakes yu will make. 你越细心，犯的错就会越少。
【即学即练】The earlier kids learn t be independent, the __________ it is fr their future. A. gd　 B. well　 C. better　　 D. best
【答案】C【解析】本题用固定句式法。句意：孩子们越早学会独立，对他们的未来就越好。固定句式the＋比较级...， the＋比较级...表示＂越……，就越……＂。
（5）表示＂两者之间比较……的一个＂时常用＂the＋比较级＋f the tw＂。
He is the thinner f the tw. 他是两个中较瘦的那一个。
【即学即练】Of the tw shirts, I’d like t chse the __________ ne t save sme mney fr a cap. A. cheapest　　　 　 B. cheaperC. mre expensive D. mst expensive
【答案】B【解析】根据句中＂Of the tw shirts＂可知本句是两者之间的比较，应用比较级。句意＂两件衬衫中，我想要选较便宜的那件，省下来的钱买一顶帽子。＂
（6）修饰比较级的词和短语有a little，a bit，a lt，much，far，even等。
Yu are a little thinner than Jim. 你比吉姆瘦点儿。
【即学即练】The bx was _______ than I had expected. I was ut f breath when I gt hme. A. mre heavier　　　B. much heavierC. little heavier D. very heavier
（1）三者或三者以上比较用最高级，形容词最高级前加the，副词可不加。句末常跟in/f短语表示范围。
4. 形容词/副词最高级用法
Tm is the cleverest f the three. 汤姆是他班里最聪明的。
He runs fastest in the class. 在这个班里他跑得最快。
【即学即练】—Lily has tw sisters, desn’t she?—Yes. She’s taller and lder than her tw sisters, but she’s nt ______ne f the three. A. the tallest　　　 B. yungest C. shrtest D. the cleverest
（2）Which/Wh＋谓语动词＋the＋形容词/副词最高级，A，B r C?
Wh is the tallest, Tm, Kate r Bill? 谁是最高的，汤姆、凯特还是比尔？
【即学即练】—Which city is _____ beautiful, Hangzhu, Beijing r Shanghai?—Hangzhu, I think.A. the mst B. the better C. mre
【答案】A【解析】本题用语法判定法。由问句可知是在三个城市之间比较，知要用最高级形式。故选A。
（3）表示＂最……的……之一＂时用ne f＋the＋形容词最高级＋复数名词。
Miss Xu is ne f the mst ppular teachers in ur schl. 徐老师是我们学校最受欢迎的老师之一。
【即学即练】This temple is ne f _________________ buildings in the twn. We must take actin t prtect it. A. ld　　　　 B. lder C. ldest D. the ldest
1.The bridge is abut ____________ lng. A.five hundred meter B.five hundred meters C.five hundreds meters D.five hundred f meters2.They ften drive t the cuntryside and ________ the fresh air. A.bring in B.take in C.get in D.turn in3.In ur class,Jasn is the _______ .He always makes us laugh. A.funny B.funnier C.funniest D.much funnier4.---I’m srry t hear that Bill failed the exam again. ---Dn’t wrry abut him. he will never give up until he _______. A.succeed B.successful C.succeeded D.succeeds 5.Mike always des his hmewrk as _________ as the exams. A,gd B.better C.well D.best
1.The wrld’s ppulatin is grwing ________ and there is ________ land and water fr grwing rice. A.larger;less B.larger;fewer C.mre;less D.mre;fewer2.I hpe everyne can care abut __________ the envirnment and stp ________ things. A.prtecting;wasting B.prtecting;t waste C.prtect;wasting D.prtect;t waste3.I think Zib is becming ___________. A.mre beautiful and mre beautiful B.mre and mre cleaner C.mre and mre beautiful D.clean and clean4.---What d yu think f math,Lily? ----I think it’s ________ than English. A.much difficult B.mre difficult C.mst difficult
书面表达。世界上仅有一个地球，我们就生存在这个地球上，所以保护环境是我们义不容辞的责任。那么，我们应该做些什么？我们该怎么做呢？take gd care, imprtant, nly ne earth, ur duty t… plant trees, cllect battery, plastic(塑料的) bags, prtect animals, spit, in public places, rubbish, … …_____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
It’s an imprtant jb t take gd care f the envirnment. Because we have nly ne earth, we can’t live withut it. It’s ur duty t prtect it. I think we can plant mre and mre trees. We can als cllect batteries and dn’t use plastic bags. We must prtect animals. Dn’t spit in public places! Dn’t thrw rubbish everywhere! I believe we can make ur hme cleaner and mre beautiful!