Unit 3 Section Ⅰ Topic talk & Lesson1（课件PPT）-【金榜题名】2025-2026学年高二英语选择性必修第一册高中同步学案（北师大版）

Unit 3 　CONSERVATION Section Ⅰ　TOPIC TALK & LESSON 1 Unit 3 返回导航 1 Unit 3 返回导航 1 Unit 3 返回导航 1 I think destroying nature is the biggest threat to our planet Unit 3 返回导航 1 If we want a better place to live in, we need to do our part to protect it we each should have a role in changing current urgent situations What do you think we should do Unit 3 返回导航 1 We need to reduce plastic Unit 3 返回导航 1 目录 contents Part 01 课前 知识储备 Part 02 课堂 优化探究 Part 04 课时作业(七) Part 03 随堂 达标演练 Unit 3 返回导航 1 课前 知识储备 返回导航 Unit 3 返回导航 1 塑料制的 采矿业 一项，一条 不可回收的 百万富翁 (牛、羊等头上的)角 大量的 太阳光(能)的 (使)孵化 Unit 3 返回导航 1 conservation destroy recycle threat switch illegally hunt extinct incredibly urgent Unit 3 返回导航 1 species wipe unusual varied decrease blame affect endangered restore Unit 3 返回导航 1 have a role do one's part die out be at risk 彻底毁灭 把……归咎于 Unit 3 返回导航 1 Unit 3 返回导航 1 Unit 3 返回导航 1 Unit 3 返回导航 1 Unit 3 返回导航 1 Unit 3 返回导航 1 Unit 3 返回导航 1 which which/that that that who Unit 3 返回导航 1 whose that whose that where Unit 3 返回导航 1 课堂 优化探究 返回导航 Unit 3 返回导航 1 Unit 3 返回导航 1 Unit 3 返回导航 1 off over Unit 3 返回导航 1 switched on Switch off Unit 3 返回导航 1 Unit 3 返回导航 1 Unit 3 返回导航 1 of play the role of a young teacher Unit 3 返回导航 1 Unit 3 返回导航 1 Unit 3 返回导航 1 plays an important part in take part in Unit 3 返回导航 1 After class，everyone takes an active part in interest groups Unit 3 返回导航 1 Unit 3 返回导航 1 Unit 3 返回导航 1 by in on Unit 3 返回导航 1 on the decrease decreased by 20% increased by 30% Unit 3 返回导航 1 Unit 3 返回导航 1 Unit 3 返回导航 1 to blame for on Unit 3 返回导航 1 Don't always blame your own failure on others Unit 3 返回导航 1 Unit 3 返回导航 1 Unit 3 返回导航 1 by with Unit 3 返回导航 1 Affected with high fever Unit 3 返回导航 1 Unit 3 返回导航 1 Unit 3 返回导航 1 down for Unit 3 返回导航 1 what I am dying for Unit 3 返回导航 1 Unit 3 返回导航 1 Unit 3 返回导航 1 at risk the Unit 3 返回导航 1 at risk of dying out Unit 3 返回导航 1 Unit 3 返回导航 1 Unit 3 返回导航 1 Unit 3 返回导航 1 Unit 3 返回导航 1 Unit 3 返回导航 1 Unit 3 返回导航 1 four times as large as/four times the area of three times as heavy as/three times the weight of three times as much Unit 3 返回导航 1 Unit 3 返回导航 1 Unit 3 返回导航 1 without without Unit 3 返回导航 1 随堂 达标演练 返回导航 Unit 3 返回导航 1 destruction threatened illegally hunter(s) extinction Unit 3 返回导航 1 Urgent varied naturally pollution negatively Unit 3 返回导航 1 It occurred to were set up cut the risk solar energy Unit 3 返回导航 1 drop out of began with (had) dreamed up make sense Unit 3 返回导航 1 take action lives on shoulder the blame wipe out In short die out Unit 3 返回导航 1 课时作业（七） 点击进入 word Unit 3 返回导航 1 谢谢观看 Unit 3 返回导航 1 [单元话题导引] Topic：Conservation Ⅰ.话题词汇 1．destroy nature　　　　　破坏大自然 2．plastic waste 塑料废品 3．the biggest threat to our planet 　　　　　对我们星球最大的威胁 4．cut down forests 砍伐森林 5．have a role 起某种作用 6．do one's part 尽自己的职责 7．illegal hunting 非法打猎 8．extinct species 灭绝的物种 9．unrecyclable items 不可回收物品 10．urgent situations 紧急的形势 Ⅱ.话题情境 根据情境和提示完成对话。 高二学生Adam正在学校电台接受采访，本期主题是对环境保护的了解和看法。 Interviewer：Hello and welcome to School Talk. Today we'd like to talk about conservation. We are glad to invite Adam again to express his opinions on how to protect the environment. Adam：Hi, everybody. I'm honored to be here. 1. (我认为破坏大自然是对我们星球最大的威胁). Interviewer：I totally agree with what you say. 2. (如果我们想要一个更好的居住环境，我们就要尽职尽责去保护它). Adam：Yes, I think so. And I think 3. (我们每个人都应该发挥作用改变当前严峻的形势). Interviewer：That sounds great. 4. (你认为我们应该怎么做呢)? Adam：5. (我们需要减少塑料垃圾，禁止砍伐森林和非法捕猎等). Interviewer：Yes. Our planet is in danger. Species are dying out. It is our duty to protect the environment. Thank you for coming to speak to us, Adam.Good luck. Ⅰ.知识图解 重点 词汇 1.plastic adj.　　　 2．mining n. 3．item n. 4．unrecyclable adj. 5．informative adj. 6．horn n. 7．mass adj. 8．solar adj. 9．hatch vi.& vt. 重点 词汇 10． n．保护 11． 　　vt.破坏；毁掉 12． vi.& vt.再利用，回收利用 13． n．威胁；(灾难等坏事)发生的可能 14． vi.&vt.转换，改变 15． adv.非法地，违法地 16． vi.& vt.猎取，猎杀 17． adj.灭绝的，绝种的 18． 　adv.非常地，极端地 19． adj.紧急的，急迫的 重点 词汇 20． n．物种，种 21． vt.擦；拭 22． adj.异常的；不平常的 23． adj.各种各样的，形形色色的 24． vi.&vt.减少n．减少；减少的量 25． vt.责怪，指责 26． vt.影响 27． adj.濒危的 28． vt.(使)恢复 重点 短语 1. 　 起某种作用 2． 尽自己的职责 3． 消失；绝迹，灭绝 4． 处境危险，受到威胁 5．wipe out 6．be to blame 重点 句式 1.They found that human activity is causing species to die out 1，000 times faster than normal. 2．Without forests，we would have no air to breathe，and without clean water we would be unable to survive. 重点 语法 限制性和非限制性定语从句 Ⅱ.阅读导学 A.阅读P52—53文章，判断正(T)误(F)。 1．Over 90 percent of all ever living species are extinct in 500 million years. 2．It is natural for species to die out usually. 3．If a sixth mass extinction occurs，entire species will be wiped out. 4．In order to avoid the sixth extinction，we need to stop traveling around. 答案：1～4　FTFF B.阅读P52—53文章，选出最佳选项。 1．What is one of the reasons for extinction? A.Sleep of volcanoes. B.Changes in sea levels. C.The increase of the oxygen. D.The decrease in temperature. 答案：B 2．What are scientists mainly concerned about as to reasons for species' dying out? A.Ages.　　　　B．Ways. C.Numbers. D．Rates. 答案：D 3．Why would we humans be at risk of dying out if 75% of all species on Earth die out? A.We will have no clean air or water. B.We will kill all species for food. C.We will have no factory farming. D.We will kill one another for water. 答案：A 4．How can we avoid the sixth extinction? A.By producing more species. B.By stopping destroying the planet. C.By taking action to protect ourselves. D.By moving to another planet immediately. 答案：B Ⅲ.单句语法填空 1．He gave us another piece of advice， I think is of great help to the research work. 2．The book my classmate lent me is very useful. 3．There is always something we are not satisfied with in our life. 4．We talked about the people and things we remembered in our primary school. 5．I'd like to make friends with those are rich in experience and knowledge. 6．There are still some people living conditions are terrible. 7．This is the best film I have ever seen these years. 8．Have you seen the film Titanic， leading actor is world­famous? 9．Who is that man is going to give us a lecture? 10．This is the place I grew up. 1．switch vi.&vt.转换；改变 We definitely need to switch to different forms of power as soon as possible.(教材P108) 我们必须要尽快转换到使用不同形式的能源。 switch on　　　打开(电灯、电视等) switch off 关上(电灯、电视等) switch over 改变；转换 ①Then I get up，go downstairs and switch on the TV in the living room. 然后我起床，下楼，打开起居室里的电视。 ②I just happened to switch although I haven't been watching the Olympics. 我并没有一直在看奥运会，当时只是恰好换到这个频道。 ③Don't forget to switch the cooker. 别忘了关掉炊具。 [链接写作]　用所学短语升级句中加黑短语 ④Turn off the gas，power etc at the mains. ⑤He seated himself on the sofa and turned on TV. 2．have a role起某种作用 We all have a role to play in protecting the environment.(教材P109) 我们在保护环境方面都可以发挥一定作用。 play a(n)...role in　在……中起…… 作用 play the role of... 扮演……的角色 the leading role 主角 ①Farming plays an important role in the country's economy. 农业在该国经济中起着重要的作用。 ②He played the role a successful lawyer in the play. 他在剧中扮演一位成功的律师。 ③My sister plays the leading role in this film. 我姐姐是这部电影的主角。 [链接写作]　完成句子 ④He will in the movie. 他将要在电影中扮演一个年轻教师的角色。 3．do one's part尽自己的职责 If we all do our part，we can live a healthier life on Earth.(教材P109) 如果我们都能尽自己的职责，我们就能在地球上过上更健康的生活。 take part (in)　 参加 play a part (in) 起作用；扮演角色 in part 部分地；在某种程度上 ①Her success was due in part to luck. 她的成功在某种程度上是由于运气好。 ②The Internet our lives. 互联网在我们生活中起着重要作用。 ③My cousin was invited to the boat race. 我的表姐应邀参加划船比赛。 [链接写作]　 翻译句子 ④课下大家积极参与兴趣小组。 . 4．decrease vi.& vt.减少 n．减少；减少的量 According to scientists，they include volcanic eruptions，asteroids hitting the Earth from space，changes in sea levels，the decrease of the oxygen content of the sea and global warming.(教材P52) 科学家们认为，造成物种灭绝的原因包括火山喷发、小行星从太空撞击地球、海平面高度改变、海水含氧量下降和全球变暖。 decrease to...　 减少到 decrease by... 减少了…… a decrease in... 在……(方面)降低/ 减少 on the decrease 正在减少 ①The number of workers in the factory has decreased to 700 persons so far. 到目前为止这家工厂的工人数量已减少到700人。 ②Compared with last year，the price of corn has decreased 5%. 与去年相比，玉米的价格降低了百分之五。 ③There has been a steady decrease population in this city.这个城市的人口在持续下降。 ④In our school the number of students who are addicted to computer games is the decrease. 在我们学校迷恋网络游戏的学生数目正在下降。 [链接写作] 完成句子 ⑤The production of the cotton this year is ，and compared with that of last year，it has ，but the price has ． 今年的棉花产量在下降，与去年相比，下降了20%，但价格却上涨了30%。 [名师指津]　decrease to...后接数字，表示“减少/下降到……”；decrease by...后接数字、百分数，表示“减少/下降了……”。 5．blame v．责怪，指责 This time，human activity will be to blame.(教材P52) 这一次，人类的活动应当(为大灭绝)承担责任。 (1)blame sb. for (doing) sth. 　为某事责备某人/责备某人做了某事 blame sth. on sb.　把某事归咎于某人 be to blame (for) 应(为……)承担责 　　　　　任；该(为……)受责备 (2)put/lay the blame for sth. on... 将某事归咎于…… ①She blamed her husband for the failure of their marriage. →She blamed the failure of their marriage on her husband. 她把婚姻的失败归咎于她丈夫。 ②I am not (blame) for my laziness，mum.I'm what you have made me. 妈妈，你不该责备我懒惰。我这么懒也是你娇惯出来的。 ③It is common that nowadays some students put the blame their poor performance in study their low IQ. 如今，一些学生把他们的学习成绩不好归咎于他们的智商低，这很常见。 [链接写作]　 完成句子 ④ ．Sometimes you yourself are to blame for it. 不要总把失败归咎于他人。有时该怪你自己。 [名师指津]　 　be to blame短语中blame不能用被动形式，该短语为主动形式表示被动含义。 6．affect vt.影响 It is clear that human activity has negatively affected all other species on Earth，including animals and plants.(教材P53) 显然，人类活动已经对地球上包括动物和植物在内的所有其他物种产生了负面影响。 be affected by　　　　被……感动/影响 be affected with 被……感染 ①The noise from the street affected our work. 街上的嘈杂声影响了我们的工作。 ②She was deeply affected his bravery. 她被他的勇敢深深地打动了。 ③Lily was affected flu，when she was in touch with the patient. 莉莉和病人接触的时候被感染而感冒了。 [链接写作]　同义句转换 ④Though he was affected with high fever，he continued with his work. → ，he continued with his work. 7．die out消失；绝迹，灭绝 How many times up to today has life on the Earth almost died out？(教材P52) 到今天为止地球上的生命几乎绝迹了多少次？ die of/from　死于 die down (风或噪音等)渐弱； 逐渐平息 be dying for 渴望，极想得到 ①Some rare birds are in danger of dying out because of human activities. 一些稀有鸟类由于人类活动正面临灭绝的危险。 ②When the applause had died ，she began her speech. 掌声平息后，她开始演讲。 ③After hours of working in the hot sun，he was dying a cold beer. 在烈日下工作数小时后，他真想喝上一杯冰镇啤酒。 [链接写作]　 完成句子 ④You mentioned that you would like to teach me English in return，which is exactly ． 你提到你愿意以教我英语作为回报，这正是我所渴望的。 8．be at risk处境危险，受到威胁 Of course，as we humans depend on so many species for our survival，we would also be at risk of dying out.(教材P53) 当然，由于我们人类依赖众多物种，所以我们的生存也受到威胁。 (1)at(the)risk of...　冒着……的风险 take a risk (＝take risks)　冒险 take the risk of doing sth.　冒险做某事 (2)risk doing sth.　冒险做某事 ①Because of wearing earphones，many teenagers are at risk of hearing loss. 由于佩戴耳机，许多青少年面临听力丧失的危险。 ②If we go to war，innocent lives will be put ． 如果我们发动战争，无辜的生命就会受到威胁。 ③Taking a risk is not a thoughtless exercise. 冒险并不是盲目的行动。 ④She couldn't take risk of leaving her daughter alone. 她不敢冒险让女儿独自待着。 [链接写作]　同义句转换 ⑤It's reported that the bird is in danger of dying out. →It's reported that the bird is ． 1．They found that human activity is causing species to die out 1，000 times faster than normal.(教材P53) 他们发现，人类活动导致物种灭绝的速度是正常情况下的1000倍。 [句式剖析]　 1．They found that human activity is causing species to die out 1，000 times faster than normal.(教材P53) 他们发现，人类活动导致物种灭绝的速度是正常情况下的1000倍。 The researchers found that laptop users took twice as many notes as those who wrote by hand. 研究人员发现，笔记本电脑用户记的笔记是那些手写者的两倍。 [句式拓展] 英语中表示倍数的句型常见的有以下五种： (1)A is...times as long/wide/high/large/deep...as B．如： The dictionary is almost five times as expensive as that one. 这本字典的价格是那本字典的五倍。 We have produced by now three times as many computers as we did last year. 我们目前已经生产出的计算机的数量是去年的三倍。 (2)A is...times longer/wider/higher/larger/deeper...than B．如： The new street is 3 times wider than the old one. 新街比老街宽两倍。 (3)A is...times the length/width/height/size/depth...of B．如： China is almost twice the size of their country in area. 在面积上中国差不多是他们国家的两倍。 This rope is more than five times the length of that one. 这根绳的长度是那根绳的五倍多。 (4)A is...times＋what从句．如： The length of the road is double what it was three years ago. 这条路的长度是三年前的两倍。 The dictionary costs three times what it did before. 这本字典的价钱是过去的三倍。 (5)A has increased/decreased/reduced/gone up/risen by...times.如： The price of meat has gone up by three times. 肉价上涨了三倍。 The costs have been reduced by 20% after the new equipment was brought in. 新设备引进后，成本已经减少了20%。 [迁移应用] 完成句子 (1)亚洲的面积是欧洲的四倍。 Asia is Europe. (2)这块大石头的重量是那块的三倍。 This big stone is that one. (3)这个国家的新鲜蔬菜真贵。这些卷心菜花了我十美元，是在国内时的三倍。 Fresh vegetables in this country are expensive indeed.These cabbages cost me $10， as they do at home. (4)据统计，男性死于皮肤癌的可能性是女性的两倍以上。 According to statistics，a man is more than twice as likely to die of skin cancer as a woman. 2．Without forests，we would have no air to breathe，and without clean water we would be unable to survive.(教材P53) 没有森林，我们将没有空气呼吸，没有干净的水，我们将无法生存。 [句式剖析]　 Without his wartime experiences，Hemingway wouldn't have written his famous novel A Farewell to Arms. 没有战时的经历的话，海明威就不可能写出《永别了，武器》这部名著。 Please don't leave without me. 请让我和你一起去。 They never meet without quarreling. 他们一见面就要吵嘴。 [迁移应用] 完成句子 (1)没有水就没有生命。 There will be no life water. (2)李先生，非常感谢你的支持和鼓励。我认为没有你的帮助我就不可能克服这个困难。 Thank you very much for your support and encouragement，Mr. Li.I don't think I can overcome the difficulty your help. Ⅰ.单句语法填空 1．The floods brought (destroy) to the area. 2．The union (threat) that they would go on strike if their demands were not met. 3．They were charged with bringing goods into the country (illegal). 4．The (hunt)agreed to take us to go hunting tomorrow. 5．Some experts appealed to people to rescue many species from (extinct). 6． (urge)measures have been taken to prevent car emission. 7．A (vary) and ancient food culture should be famous worldwide. 8．The glass appears to reflect light (natural). 9．We can't afford to overlook such serious (pollute) to the environment. 10．On the other hand，there are always some people who view this gap (negative). Ⅱ. 选词填空 shoulder the blame　take action　wipe out　it occurred to　die out　cut the risk　in short　solar energy　set up　live on 1． me that I could use your car to fetch my homework. 2．Organisations to help those affected by the earthquake. 3．Jogging can of diseases such as heart attack. 4．To ensure the pod can use ，it was equipped with these panels. Ⅱ.选词填空 come up with　be committed to　drop out of　die of　give away　put in effort　begin with　be regarded as　make sense　dream up 1．The poor child will not school because of the help from the local charity organisation. 2．The trouble me and should end with me. 3．They different ways to get more money but all failed. 4．It doesn't to have a public space that no one can use. 5．We need to to prevent similar disaster to happen again. 6．The animal meat instead of grass. 7．The driver was brave enough to . 8．The medicine can help unhappy memories. 9． ，we need another 3 million dollars to cover the expense. 10．Measures should be taken before the endangered animals ． $$