2024春高中英语Unit3Conservationperiod1TopicTalk课件（北师大版选择性必修第一册）

这是一份2024春高中英语Unit3Conservationperiod1TopicTalk课件（北师大版选择性必修第一册），共46页。

UNIT 3　CONSERVATIONPeriod One　Topic Talk课前自主预习A．猎取，猎杀B．灭绝的，绝种的C．紧急的，急迫的D．一项，一条E．转换，改变Ⅰ.猜词意1．The most urgent thing in a fire is to make sure everyone is out of the building. (　　)2．She started studying English，but switched to law in her second year. (　　)3．Many tribes became extinct when they came into contact with Western illnesses. (　　)4．Several items of clothing lay on the floor. (　　)5．Cats like to hunt mice and birds. (　　)【答案】1—5　CEBDAⅡ.猜单词拼写1．conserve v.& n.→ __________ n．保护2．information n.→ __________ adj.有教育意义的；知识性强的【答案】1.conservation　2.informative3．legally adv.→ __________ adv.非法地，违法地4．incredible adj.→ __________ adv.非常，极端地5．recycle vi.&vt.→ __________ adj.不可回收的【答案】3．illegally　4.incredibly　5.unrecyclableⅢ.预备话题素材1．We each should _______ ________ ________ in changing current urgent situations.(发挥作用)2．If we want a better place to live in，we need to________ ________ ________ to protect it.(尽我们的职责)3．________ ________ ________ ________ (非法猎捕野生动物) will be punished severely.【答案】1.have a role　2.do our part3．Illegally hunting wild animals课堂新知讲练◇词汇拓讲1．threat n．威胁；(灾难等坏事)发生的可能(P110) After the lecture，I can see that the use of oil and coal is one of the biggest threats to our planet.【翻译】讲座结束后，我明白了石油和煤炭的使用是对我们星球最大的威胁之一。(1)make threats against sb对某人进行威胁under threat受到威胁(2)threatening adj.恐吓的，威胁的threatened adj.受到威胁的threaten vt.威胁到；危及；威胁，恐吓【语言提升】There is a real threat of war.的确有可能发生战争。He threatened to take his boss to court.他扬言要把他的老板告上法庭。【温馨提示】-en作后缀可用于构成动词，常表示“使，使成为，变得”等含义。常见的此类动词还有：shorten 使缩短；deepen加深，使变深；broaden使变宽，加宽；sharpen使锋利，削尖；strengthen加强；frighten使害怕。【针对练习】单句语法填空(1)Wildlife has been greatly ______(threat) in the modern age.(2)Our neighbour threatened __________(call) the police if we didn’t stop the noise.(3)Some cultures see direct eye contact as impolite or _______ (threaten)behaviour，while Americans see it as a sign of genuineness and honesty.【答案】(1)threatened　(2)to call　(3)threatening2．switch vi.& vt.转换，改变(P110) We definitely need to switch to different forms of power as soon as possible.【翻译】我们确实需要尽快转向到(其他)不同形式的能源。switch to切换到；变成switch on＝turn on打开(电器)switch off关闭(电器)；不再想着；不再注意；失去兴趣switch over 换台；换频道switch (from A) to B　(由A)转变成B【语言提升】To keep fit，you can switch to morning or lunchtime exercise.为了保持健康，你可以转变到早上或午间锻炼。What happens when you switch on a computer?当你开启电脑时，发生了什么？【针对练习】用switch相关短语的正确形式填空(1)Please ________________ the radio to listen to news and the weather forecast.(2)Be sure to ________________ the light when you leave the office.【答案】(1)switch on　(2)switch off(3)We’d better take the train into the city centre，then a bus，____________ the tram(有轨电车)，then maybe a taxi.(4)This play is too boring.Will you please ________________ to CCTV 5 to watch the live football match?【答案】(3)switching to　(4)switch over3．cut down削减，砍倒(P110)I think we should cut down the use of unrecyclable plastic to protect our planet.【翻译】我认为我们应该减少使用不可回收塑料来保护我们的地球。(1)cut down砍倒(2)cut down还可以表示“减少”，其后面也可以直接接宾语。cut...down (to...) 减少……(至……)cut down on...减少(在某个方面的开支)【语言提升】(3)cut构成的其他短语：cut up切碎cut off切断cut in插话；插入cut out切掉；删去；关掉Desertification is also formed because people cut down trees and dig up grass.人们伐树掘草也会造成荒漠化。Cut down on fatty foods if you want to lose weight.你如果想减肥，就得少吃高脂肪食物。【针对练习】用cut的相关短语填空(1)Experts think the amount of homework for the students should be ________.(2)The water supply has been ________ temporarily because the workers are repairing one of the main pipes.(3)It is impolite to ________ when other people are talking.(4)I have been advised to ________ the poem from my article.【答案】(1)cut down　(2)cut off　(3)cut in　(4)cut out◇句式解读1．(P109—110) It was by Professor Linda Wei，the environmental expert，wasn’t it?【翻译】那是环境专家琳达·魏教授写的，不是吗？【句式解读】本句是一个附加疑问句，由陈述部分“It was by Professor Linda Wei，the environmental expert”和附加疑问部分“wasn’t it”构成。【句式提升】附加疑问句由陈述部分和附加疑问部分组成。其中附加疑问部分用于表示反问、疑问或强调等。附加疑问句的基本用法如下：(1)附加疑问句的构成：“肯定的陈述部分＋否定的附加疑问部分”或“否定的陈述部分＋肯定的附加疑问部分”。(2)附加疑问部分的主语：一般用与前面陈述部分的主语一致的人称代词(3)回答：对“否定的陈述部分＋肯定的附加疑问部分”的肯定回答仍然用yes，否定回答用no，但是yes译为“不”，no译为“是的”。【归纳拓展】附加疑问句的其他常见情况：(1)当陈述部分的主语是everybody，everyone，someone，nobody，somebody等时，附加疑问部分的主语通常用they。Everyone knows the answer，don’t they?每个人都知道答案，不是吗？(2)陈述部分为含有定语从句或主语从句的主从复合句时，附加疑问部分的主语和谓语一般和主句的主语和谓语保持一致。He is not the man who gave us a report，is he?他不是给我们做报告的那个人，是吗？(3)当陈述部分为there be结构时，附加疑问部分仍由there和be来构成。There’s no water，is there?没有水了，是吗？(4)当陈述部分中有seldom，hardly，never，few，nothing，little等表示否定意义的词时，附加疑问部分用肯定形式。You have nothing against it，have you?你没有什么反对的，对吗？(5)当陈述部分是 “I/We＋think/believe/suppose/expect...＋宾语从句”时，附加疑问部分的主语和谓语往往和从句的主语和谓语保持一致，但要注意否定转移。I don’t think he is a suitable man for the job，is he?我认为他不是做那项工作的合适人选，不是吗？(6)“祈使句＋附加疑问部分”型附加疑问句中，附加疑问部分一般用will you。Don’t close the door，will you?别关门，好吗？(7)以Let’s开头的祈使句，附加疑问部分用shall we；以Let us开头的陈述句，附加疑问部分用will you。Let’s meet at the school gate，shall we?我们校门口见，好吗？【针对练习】补全下面的反意疑问句(1)There is little doubt in your mind that he is innocent(无辜的)，____________？(2)He hardly gets up late，____________？(3)Everyone is here，__________？【答案】(1)is there　(2)does he　(3)aren’t they(4)Let us do it now，______________？(5)—Mike seldom has breakfast at home，________？—No，but he did this morning.(6)I don’t think Michael has finished the report，_________？【答案】(4)will you　(5)does he　(6)has he2．(P110)...there will be no rhinos left in the world in 20 years.【翻译】二十年后，世界上将没有犀牛了。【句式解读】本句中的left是leave的动词的-ed形式，意为“剩下”。它在此作定语，修饰前面的名词rhinos。【句式提升】(1)动词的-ed形式作定语分为前置和后置两种情况：①前置定语：单个的动词的-ed形式作定语，通常放在被修饰词之前，但有些单个的动词的-ed形式习惯上放在所修饰词语的后面，如left。②后置定语：动词的-ed形式短语作定语时，通常放在被修饰词之后，它的作用相当于一个定语从句。This is one of our required subjects.这是我们的必修课之一。(2)动词的-ed形式作定语常用来修饰名词或代词，其逻辑主语就是它所修饰的名词或代词。动词的-ed形式表示被动、完成(不及物动词的动词的-ed形式只表示完成)。【针对练习】单句语法填空(1)A survey _________(make)at the end of last month suggests that 80% of the students in our school will study science in the future.【答案】(1)made(2)Jim has retired，but he still remembers the happy time he __________(spend) with his students.(3)The producer comes regularly to collect cameras ________ (return) to our shop for quality problems.【答案】(2)spent　(3)returned 翻译句子(4)我上周从图书馆借了一本马克·吐温写的书。____________________________________________【答案】(4)I borrowed a book (which/that was) written by Mark Twain from the library last week.随堂知能小练Ⅰ.单词拼写1．The next __________(一项) on the agenda is the publicity budget.2．Coal ____________(采矿业) has always been a dangerous occupation.3．I looked inside his ________(塑料制的) bag and saw some carrots with soil.【答案】1.item　2.mining　3.plastic4．We’re in the process of ___________(转换) over to a new system of invoicing.5．These books，while they seem like ________(有教育意义的)，are not necessarily truthful.6．A big jump in energy ________(保护) could be achieved without much disruption of anyone’s standard of living.【答案】4．switching　5.informative　6.conservation7．They leave business cards informing them what they can and can’t ______(回收利用)，and let them know how their efforts work.8．One winter day while he was ________(猎取)，he saw the tracks of animals in the snow.【答案】7．recycle　8.huntingⅡ.单句语法填空1．The ______________(hunt) agreed to take us to go hunting tomorrow.2．__________(urge) measures have been taken to prevent car emission.3．They were charged with bringing goods into the country ________(illegal).【答案】1.hunter　2.Urgent　3.illegally4．Some experts appealed to people to rescue many species from ________(extinct).5．Some of the greatest problems we face today are the serious ________(destroy) of our environment.6．But the rising sea level and the carbon pollution causing warming oceans are ________(threat) their existence.【答案】4．extinction　5.destruction　6.threateningⅢ.完成句子1．I ____________________ him the secret.我渴望去告诉他这个秘密。2．I was very lucky __________________ so cheap.我很幸运，能以这么便宜的价格买到这本书。【答案】1.have an urge to tell2．to get the book3．I hope I can get a good mark and that_______________.我希望我能取得一个好成绩，然后我能上大学。4．The way ________________ is vitally important.抚养子女选用何种方式是极其重要的。【答案】3.I can go to college4.we choose to bring up children