英语选择性必修 第一册Unit 5 Working the Land评课课件ppt

这是一份英语选择性必修 第一册Unit 5 Working the Land评课课件ppt，共60页。PPT课件主要包含了课前自主预习，Ⅰ猜词意，课文语篇研读，课堂新知讲练，用法详解，归纳拓展，随堂知能小练，写作高效提升，写作指导等内容，欢迎下载使用。

A．例子；实例；事例B．完全必要的；极其重要的C．消化；领会；领悟；摘要；文摘D．可供选择的事物；可供替代的；非传统的E．礼物；呈现；提交；当前的
1．Even in small cmpanies，cmputers are an essential tl.(　　)2．He gave in nly at the last mment because he had n alternative.(　　)3．My friend gave me a present n my birthday.(　　)【答案】1－3　BDE
4．This affects the crps grwn n the land and，in turn，the animals and humans wh digest them.(　　)5．I wuld nrmally suggest taking time ff wrk，but in this instance I’m nt sure that wuld d any gd.(　　)【答案】4－5　BDECA
Ⅱ.猜单词拼写1．essential adj.完全必要的；极其重要的→ ________ adv.必要地2．instance n．例子；实例；事例→ ________n．(同义词)例子；榜样3．present n．礼物→________ v．(词性转换)呈上；递交【答案】1．essentially　2．example　3．present
Ⅲ.预备写作素材1．在我看来，是我最好的朋友改变了我对生活的态度。_____________，my best friend changed my attitude twards life.2．我宁愿你明天和我待在一起。__________ yu stayed with me tmrrw.【答案】1．In my pinin　2．I wuld rather
3．遗憾的是，她犯了这样一个错误。________ that she has made such a mistake.4．我觉得这地方有点危险。I ________________ that this place is a little dangerus.5．我更希望珍妮来参加这次派对。I wuld prefer Jenny ______________the party.【答案】3．It is a pity　4．have a feeling　5．t cme t
Ⅰ.阅读课文，判断信息正误(　　)1．Chemical pesticides and artificial fertilisers can fight crp disease and increase prductin.(　　)2．Pesticides can damage the land by nly killing harmful bacteria and insects.【答案】1－2　TF
(　　)3．Chemical fertilisers make crps grw fast t be rich in nutritin.(　　)4．Organic farmers keep their sil rich and free f disease thrugh natural means.(　　)5．Organic farming serves the high demand fr fd arund the wrld.【答案】3－5　FTF
Ⅱ.阅读课文，选择正确选项(　　)1．Why did many farmers welcme the intrductin f chemical farming?A．Because it can fight crp disease and increase prductin.B．Because it harms bth the land and peple’s health.C．Because it can help prduce rich sil.D．Because it is nt expensive.【答案】A
(　　)2．What cncerns many peple abut the use f pesticides?A．Pesticides can damage the land.B．Chemicals can stay in the sil fr a lng time.C．Pesticides can kill harmful bacteria and insects.D．Chemicals may make peple ill and even cause cancer.【答案】D
(　　)3．Why d rganic farmers change the kind f crp grwn in each field every few years?A．Because it helps put imprtant minerals back int the grund.B．Because it can avid damage t the envirnment.C．Because it can help increase utput.D．The authr didn’t tell us.【答案】A
(　　)4．Why can’t we stp the use f man-made chemicals in agriculture entirely?A．Because rganic farming cst us a lt f mney.B．Because rganic farming can meet peple’s need.C．Because chemical farming brught us huge prfit.D．Because chemical farming helps serve the need fr fd.【答案】D
◇词汇拓讲1．in turn相应地；转而；依次；轮流(P55)This affects the crps grwn n the land and，in turn，the animals and humans wh digest them.【翻译】这影响了生长在土地上的作物，进而影响消化它们的动物和人类。
by turns轮流；依次take turns ding/t d... 轮流做……It’s ne’s turn t d sth.轮到某人干某事
The girls tk it in turn t wipe dwn the tables after meals.女孩子们饭后轮流擦桌子。When it is my turn，I realised why the prcess was mving s slw.当轮到我的时候，我明白进程为什么这么慢了。
[针对练习]单句语法填空(1)The girls called ut their names ________ turn.(2)They tk ________(turn) t care abut their parents.(3)It is my turn ________(clean) the classrm this week.【答案】(1)in　(2)turns　(3)t clean
完成句子(4)She ______________________________.她依次向每一个人问同样的问题。【答案】(4)asked everyne the same questin in turn/by turns
2．essential adj.完全必要的；极其重要的(P55)They may lk beautiful n the utside，but inside there is usually mre water than essential minerals，and they ften have less flavur as well.【翻译】它们可能外表看起来很漂亮，但里面通常有更多的水，而不是必需的矿物质，而且它们的味道通常也更差。
be essential t/fr... 对……很重要It is essential that...(shuld) d...做……是完全必要的。It is essential fr sb.t d...对某人来说做……是完全必要的。
It is essential t knw where the prblem lies.完全有必要知道问题在哪里。It is essential that we (shuld) deal with the prblem.我们很有必要处理这个问题。
[针对练习]单句语法填空(1)Sun and water are essential ________ the grwth f crps.(2)It is essential fr us ________(set) ur gal realistically.(3)It is essential that yu ________(learn) Chinese histry.【答案】(1)t/fr　(2)t set　(3)(shuld) learn
完成句子(4)________________ yu shuld cme hme early.你很有必要早点回家。(5)A rich and varied cultural life ______________________．丰富多样的文化生活对这对夫妇而言是至关重要的。【答案】(4)It is essential that(5)is essential t/fr this cuple
3．alternative n．可供选择的事物adj.可供替代的；非传统的(P55)As an alternative，sme farmers have switched t rganic farming，and many custmers have turned t rganic fd when they shp at the lcal grcery.【翻译】作为另一种选择，一些农民转向有机农业，许多顾客在当地杂货店购物时转向有机食品。
(1)have n alternative/chice but t d sth.别无选择只好做某事have the alternative f ding sth.有做某事的选择；可以做某事There’s n t d sth.……别无选择只好做某事。an alternative t... ……的替代品(2)alternatively adv.可供选择地
He gave in nly at the last mment because he had n alternative.他只是在最后一刻因为没有选择才做了让步。If he wants t g t Hng Kng tnight，he has n alternative but t g by air.如果他今晚想去香港，除了坐飞机外别无选择。
【特别提醒】“别无选择只好做……”的其他表达形式还有：have n chice but t d sth.；can’t d sth. but d sth.；can d nthing but d sth.等。在这些结构中，若but之前出现实义动词d的某种形式，不定式要省略t，否则，but之后的t不能省略。
[针对练习]单句语法填空(1)I had n alternative but ________(accept) the ffer.(2)We culd walk r ________(alternative) we culd g in Ted’s car.(3)If yu dn’t like the schl lunch，yu have the alternative f ________(bring) yur wn.【答案】(1)t accept　(2)alternatively　(3)bringing
完成句子(4)I ______________ reprt him t the plice at that time.在那时，我别无选择，只好向警方告发他。【答案】(4)had n alternative/chice but t
4．instance n．例子；实例；事例(P56)Fr instance，they may grw crn r wheat in a field ne year，and then grw beans there the next.【翻译】例如，他们可能一年在一块地里种玉米或小麦，然后第二年再改种豌豆。
fr instance例如in this instance在此情况下in the first instance第一；首先
In bth instances，the result is besity.这两种情况导致的结果都是肥胖。Mst fd webs，fr instance，cnsist f many weak links rather than a few strng nes.例如，大多数食物网由许多薄弱链接组成，而不是几个强有力的链接组成。
[针对练习]单句语法填空(1)________ the first instance，yur child will be seen by an ear，nse and thrat specialist.(2)There are a number f imprvements，____________ instance，bth muse buttns can nw be used.【答案】(1)In　(2)fr
完成句子(3)This prblem seemed t be cmplex ________________，but it culd be easily slved.这个问题乍一看似乎很复杂，但其实很容易解决。(4)She has mastered several freign languages，___________ _________，French.她精通几种语言，例如法语。【答案】(3)in the first instance　(4)fr instance
5．depth n．向下(或向里)的距离；深(度)(P56)Organic farmers als plant diverse crps that use different depths f sil t help keep it rich.【翻译】有机种植的农民也种植不同的农作物，利用不同深度的土壤来保持土壤肥沃。
(1)frm the depth f the mind从心底里；真心地at a depth f... 在……的深度in the depths f... 在……正中；在……深处in depth深入地；全面地(2)deep adj.深的　adv.深深地(3)deeply adv.深深地；强烈地(4)deepen v．(使)变深；(使)加深
The smaller lake ranges frm five t furteen feet in depth.小一些的湖深度从5英尺到14英尺不等。【语境串联】She belngs t herself. Nbdy can measure the depth f her heart，deep as sea.她属于自己。没有人能测出她心有多深，深似大海。
[针对练习]单句语法填空(1)Plant the beans ________ a depth f abut six inches.(2)When her sn gt injured and disabled in the accident，she was in ________ depths f despair.【答案】(1)at　(2)the
完成句子(3)This subject will be cvered ________________ next term.这个话题将在下学期深入讨论。(4)____________________________，many things I did with my father still live.在我记忆深处，我与父亲一起做过的很多事仍然存在。【答案】(3)in depth　(4)In the depths f my memry
◇句式解读1．(P55)Fr example，pesticides can damage the land by killing nt nly harmful bacteria and insects，but als helpful nes.【翻译】例如，杀虫剂不仅可以杀死有害的细菌和昆虫，还可以杀死有益的细菌和昆虫，从而破坏土地。【句式剖析】句中的nt als...意为“不仅……而且……”，用作并列连词，相当于“nt als...”。
(1)该结构常用来连接并列成分，如两个主语、谓语、宾语、表语、定语、状语或句子，在意义上强调后者，其中als可以省略。(2)“nt als...”连接主语时，谓语动词的单复数形式遵循“就近”原则；当nt nly 位于句首连接两个句子时，第一个分句要用部分倒装，第二个分句不倒装。
Shakespeare was nt nly a writer but (als) an actr.莎士比亚不仅是一位作家，而且是一位演员。Light and bright clurs make peple nt nly happier but mre active.淡雅和鲜艳的颜色不但使人更快乐，也会使人更加活泼。
[针对练习]单句语法填空(1)They nt nly brke int his ffice _______als tre up his papers.(2)Nt just the students but als their teacher ________(like) playing ftball.【答案】(1)but　(2)likes
完成句子(3)Nt nly _______________ crrectly，but he als speaks it fluently.他不仅能准确地说英语，而且说得很流利。(4) has saved the bys frm the fire.不仅是你而且还有他从火中救出了那些男孩。【答案】(3)can he speak English(4)Nt nly yu but (als) he
2．(P55)As fr chemical fertilisers，crps grwn with them usually grw t fast t be rich in nutritin.【翻译】至于化肥，用它们种植的作物通常生长得太快，而不含丰富的营养。【句式剖析】句中的意为“太……而不能……”，表示否定含义。
(1)t＋adj.＋t d sth.，其中的形容词为表示情感、心情或倾向等主语态度的词，常见的有anxius，eager，glad，happy，pleased，ready，willing等，表示肯定意义，意为“非常/很……干某事”。(2)can’t/can never 再……也不过分
It’s t cheap t be gd.这东西太便宜，好不了(即便宜无好货)。
[针对练习]单句语法填空(1)Yu can’t be t careful ________(d) yur hmewrk.完成句子(2)He is ________________________．他总是乐于助人。【答案】(1)t d (2)t ready t help thers
一句多译(3)当她听到这则消息时激动得说不出话来。She was ________________ she culdn’t say a wrd when she heard the news.＝She was ___________________ when she heard the news.【答案】(3)s excited that；t excited t say a wrd
Ⅰ.单句语法填空1．He asked each f us ________ turn t describe hw the Internet had affected ur lives.2．If he takes n this wrk，he will have n alternative but ________(meet) an even greater challenge.3．What’s the ________(deep) f the lake?4．________ nly is she pretty but als kind-hearted.【答案】1．in　2．t meet　3．depth　4．Nt
5．Smetimes，I was t weak ________(g) t schl s my educatin suffered.6．There ________(be) tw thusand students in ur schl.7．Sme fds ________(digest) mre easily than thers.8．She is an ________(essential) selfish persn.【答案】5．t g　6．are　7．are digested8．essentially
9．There are jbs mre dangerus than truck driving；________ instance，training lins.10．Are yu sure yu ___________(entire) understand the imprtance f cmpleting these frms as accurately as pssible?【答案】9．fr　10．entirely
Ⅱ.短语填空in additin，in turn，because f，as fr，as well，fr instance1．I’ll d sme reading fr fun，and fr knwledge _______.2．Thery is based n practice and ________ serves practice.3．Yu need mney and time；_______，yu need diligence.【答案】1．as well　2．in turn　3．in additin
4．________ parents，nthing can be cmpared with their children’s physical and mental health.5．We can prtect ur envirnment by creating less waste at the start—________，buying reusable prducts and recycling.6．________ the help yu gave me that summer，my life changed.【答案】4．As fr　5．fr instance　6．Because f
Ⅲ.课文语法填空Chemical pesticides and artificial fertilisers have been in widespread use in farming 1． the middle f the 20th century，but scientists fund that their lng-term use can smetimes 2． (d) harm t bth the land and peple’s health. In mst 3． (cuntry)，sme pesticides like DDT have been prhibited because f the damage 4． (cause) t peple and the envirnment.【答案】1．since　2．d　3．cuntries　4．caused
5． (slve) the prblem，sme farmers have switched t rganic farming. They use natural waste frm animals as fertiliser instead 6． artificial fertilisers. By ding s，they make the sil in their fields 7． (rich) in minerals than befre. Many ther methds are als used t prduce rich sil. Farmers ften change the kind f crp grwn in each field every year. In this way，sme imprtant minerals 8． (put) back int the grund.【答案】5．T slve　6．f　7．richer　8．are put
Sme peple wuld prefer t stp the use f man-made chemicals in agriculture 9． (cmplete)，but rganic farming can’t serve the high demand fr fd arund the wrld. S scientists have t find a 10． (suit) slutin t the prblem.【答案】9．cmpletely　10．suitable
Ⅳ.完成句子1．We distribute the bks t charities，and thse rganisatins __________ give the bks t needy children.我们把书分发给慈善机构，这些机构转而把书分发给贫困的孩子们。2．____________________________ dismiss yu.我们只好辞退你，别无其他办法。【答案】1．in turn 2．We had n alternative but t 
3．Nt nly ____________________，but als he is clever.他不仅学习刻苦，而且还很聪明。4．My cffee is ________________________.我的咖啡热得没法喝。【答案】3．des he study hard4．t ht t drink
5．He desired that his bk be read by ________________.他希望有尽可能多的人读他的书。【答案】5．as many peple as pssible
◎单元写作目标如何写表达观点的文章动笔前，你的大体构思：____________________________________________________________________________________________________________________________________________________________________________________________________
◎话题佳句【引人入胜的开头句】Peple take different views n this questin.人们对这个问题的看法各不相同。In my pinin，it is wrng t...在我看来……是错误的。
I dn’t think it is a very gd way t...我认为……不是一个很好的方法。I’m writing t persuade yu t quit/give up...我写信是劝你放弃……【精彩纷呈的篇中句】Here are my reasns. First f all，I think it wuld be better if...我的理由如下。首先，我认为如果……会更好。The reasn that...……的原因是……
Hwever，sme f them hld a different view/hld the ppsite pinin.然而，有些人持不同的看法/相反的观点。If I were yu，I wuld...如果我是你，我会……N ne can ignre the fact that...没有人能忽视这个事实……
【回味无穷的结尾句】In cnclusin...总之……All things cnsidered...从各方面看来……As far as I’m cncerned，...我认为……Frm what has been discussed abve...通过以上讨论……
◎写作范例【写作任务】关于有机农业和化学农业，你们班举行了一场辩论。请结合你们的讨论结果，写一篇支持有机农业的英语作文，100词左右。
内容包括：1．化学农业的危害；2．有机农业的优点；3．讨论的结果和大家的期待；4．发表自己的观点。
【遣词造句】Ⅰ.用本单元所学单词或短语填空1．______________adj.化学的　n．化学制品2．______________n．营养；滋养3．______________adj.营养丰富的【答案】1．chemical　2．nutritin　3．nutritius
4．______________n．肥料5．______________有机农业6．______________导致【答案】4．fertiliser　5．rganic agriculture　6．lead t
Ⅱ.本单元语块、语法运用1．句式积累(1)就现代农业的发展而言，化学农业和有机农业是两个关键词。________________ the develpment f mdern agriculture，chemical agriculture and ______________ are tw key wrds.【答案】(1)In terms f；rganic agriculture
(2)关于化学农业和有机农业有各种观点。There are _______________ chemical agriculture and rganic agriculture.(3)毫无疑问，残留在作物内部的化学物质会导致癌症或其他疾病。that the chemicals staying inside the crps ______________ r ther illnesses.【答案】(2)varius pinins abut(3)There is n dubt；can lead t cancer
(4)此外，这些蔬菜长得很快，几乎没有营养。Besides，the vegetables grw _______________________．(5)第二，有机农产品简单地使用天然肥料，使蔬菜和水果既美味又有营养。Secnd，rganic prduce simply uses natural fertilisers，and _____________________________.【答案】(4)s fast that they cntain little nutritin(5)makes vegetables and fruit tasty and nutritius
2．句式升级(6)将句(1)(2)合并为含有定语从句的句子_________________________________________________【答案】(6)In terms f the develpment f mdern agriculture，chemical agriculture and rganic agriculture are tw key wrds，abut which there are varius pinins.
(7)将句(5)升级为含有现在分词短语的句子_________________________________________________【答案】(7)Secnd，rganic prduce simply uses natural fertilisers，making vegetables and fruit tasty and nutritius.
【连句成篇】_________________________________________________One pssible versin：In terms f the develpment f mdern agriculture，chemical agriculture and rganic agriculture are tw key wrds，abut which there are varius pinins.
Chemical agriculture has many disadvantages. There is n dubt that the chemicals staying inside the crps can lead t cancer r ther illnesses. Besides，the vegetables grw s fast that they cntain little nutritin. Organic fd is becming increasingly ppular with custmers. The first reasn is that peple attach great imprtance t health. Secnd，rganic prduce simply uses natural fertilisers，making vegetables and fruit tasty and nutritius.S it is wiser t chse rganic fd.
◎写作练笔近日，你们班就中学生该不该进行军训进行了讨论。针对这一讨论，请写一篇短文，发表你的看法，内容包括：1．军训目的；2．军训内容；3．你的看法。注意：1．词数100左右；2．可以适当增加细节，以使行文连贯。参考词汇：军训military training
_________________________________________________One pssible versin：The aim f military training is t develp a sense f discipline and teamwrk in students and students are expected t experience the hardships t develp their strng will.But fr a student，the military training is ften cnsidered bring because he just fllws a dull way f exercise，fr example，standing in the sun r running fr a lng time.