Unit 3 Conservation（复习课件）英语北师大版选择性必修第一册

该高中英语单元复习课件围绕“Conservation”主题，系统整合词汇、短语、语法及写作知识。通过知识图谱将核心词汇如conserve、threaten，重点短语如contribute to、in danger of，单元语法如非限制性定语从句与主题写作串联，构建逻辑清晰的知识网络。 其亮点在于融合语言能力与思维品质培养，如主题写作提供正反观点议论文模板及范文，训练学生运用非限制性定语从句和it形式主语准确表达。语法部分通过对比表区分限制性与非限制性定语从句，搭配即时训练提升分析判断能力。综合训练分层设计，从单词拼写到短文填空适配不同水平学生，助力教师精准教学，有效巩固单元知识。

北师大版·选择性必修第一册 Unit 3 Conservation 单元复习 Unit 3 Conservation 复习目标 知识图谱 考点串讲 单元语法 主题写作 综合训练 复习目标 知识图谱 考点串讲 单元语法 主题写作 综合训练 CONTNETS 1.学生能够掌握本单元重点词汇，如 conserve, threaten, extinct, restore, prohibit, sustain, contribute, tolerate, decline, reserve 等，并能在不同语境中正确运用。（重点掌握） 2. 学会重要短语和句型，如 contribute to, die out, in danger of, be home to, prohibit sb. from doing, It is +adj. +to do，非限制性定语从句等，并能利用这些短语和句型进行口头和书面表达。（重点掌握） 3. 提高阅读理解能力，能够读懂关于物种保护、环境危机、生态修复、可持续发展主题的文章，理解文章主旨大意、细节信息，并能根据文章内容进行推理判断。​ 4. 培养书面表达能力，能够运用所学词汇、短语和句型，写环保倡议书、演讲稿，正反观点议论文，呼吁保护生物与生态环境，做到词汇丰富、句式多样、逻辑清晰。 复习目标 知识图谱 It is +adj. +to do 分限制性定语从句 单元语法 2. for/against常用句式 3. 必背短文模板 主题写作 1. 论说文解读 动词：conserve 保护；threaten 威胁；restore 恢复；prohibit 禁止；sustain 维持；contribute 促成、贡献；decline 下降；reserve 保护、预留 形容词：endangered 濒危的；extinct 灭绝的；sustainable 可持续的；fragile 脆弱的；native 本土的；vulnerable 易受伤害的 重点单词 名词：extinction 灭绝；reserve 保护区；habitat 栖息地；decline 下降；conservation 保护；species 物种 die out 灭绝 be home to 是…… 的栖息地 重点短语 contribute to 促成、有助于 in danger of 处于…… 危险之中 take action 采取行动 Conservation Unit 3 Conservation 考点串讲 北师大版·选择性必修第一册 考点串讲 重点词汇 单词 词形 意思 vt. 保护；保存 vt. 威胁；危及 adj. 灭绝的，绝种的 vt. 恢复；修复 vt. 禁止，阻止 vt. 维持；使持续 conserve threaten extinct restore prohibit sustain 考点串讲 重点词汇 单词 词形 意思 vi.&vt. 贡献；促成，导致 v./n. 下降；衰退 vt./n. 预留；保护区 adj. 易受伤害的；脆弱的 n. 栖息地 adj. 脆弱的 contribute decline reserve vulnerable habitat fragile 考点串讲 词形转换 1.conserve vt. 保护 → conservation n. 保护；保存 → conservative adj. 保守的 2.threaten vt. 威胁 → threat n. 威胁 3.extinct adj. 灭绝的 → extinction n. 灭绝 4.restore vt. 恢复 → restoration n. 恢复；修复 5.prohibit vt. 禁止 → prohibition n. 禁止 6.sustain vt. 维持 → sustainable adj. 可持续的；unsustainable adj. 不可持续的 考点串讲 词形转换 7.contribute v. 贡献；促成 → contribution n. 贡献；促成因素 8.decline v./n. 下降 → declining adj. 下滑的，衰退的 9.reserve v./n. 保护，储备 → reservation n. 预约；保护区 10.vulnerability n. 脆弱 → vulnerable adj. 易受伤害的 11.fragility n. 脆弱 → fragile adj. 脆弱的 12.native adj. 本土的 → n. 本地人；native species 本土物种 考点串讲 词汇精讲 conserve vt. 保护；保存 情景导学 We must conserve natural resources for future generations. 我们必须为后代保护自然资源。 用法归纳 conserve natural resources /wildlife 保护自然资源 / 野生动植物 词汇拓展 ①conservation n.（生态）保护 即时训练 People are trying their best _______________(conserve) the fragile ecosystem.. to conserve 考点串讲 词汇精讲 2. threaten vt. 威胁；危及 情景导学 Human caused pollution threatens many native species. 人为污染危及很多本土物种。 用法归纳 ①threaten sth. 危及某物 ②threaten to do sth. 威胁要做某事 词汇拓展 ①threat n. 威胁；a threat to … 对…… 的威胁 即时训练 Pollution is a great threat ________ wildlife survival. to 考点串讲 词汇精讲 3. restore vt. 恢复；修复 情景导学 Scientists are making efforts to restore the damaged wetland. 科学家正在努力修复遭到破坏的湿地。 用法归纳 ①restore sth. to… 把…… 恢复到…… 状态 词汇拓展 ① restoration n. 恢复，修复 即时训练 They hope ______________(restore) the local habitat to its original state to restore 考点串讲 词汇精讲 4. prohibit vt. 禁止，阻止 情景导学 The law prohibits people from hunting endangered animals. 法律禁止人们捕猎濒危动物。 用法归纳 ①prohibit sb. from doing sth. 禁止某人做某事 词汇拓展 ①prohibition n. 禁止 即时训练 Rules prohibit visitors ________destroying plants in the reserve. from 考点串讲 词汇精讲 5. sustain vt. 维持；使持续 情景导学 Clean water and fresh air sustain all forms of life on earth. 洁净的水和空气维持地球上所有生命。 用法归纳 ①sustain life /development 维持生命 / 发展 词汇拓展 sustainable adj. 可持续的 即时训练 We need _______________(sustain) balanced development of nature and society. to sustain 考点串讲 词汇精讲 6. contribute vi.&vt. 贡献；促成，导致 情景导学 Human activities greatly contribute to species’ decline. 人类活动极大地造成物种数量下降。 用法归纳 ①contribute to (doing) sth. 促成；导致；为…… 做贡献（to 是介词） 词汇拓展 contribution n. 贡献；促成因素 即时训练 Cutting down forests contributes to many animals ____________(lose) their habitats.. losing 考点串讲 词汇精讲 7. decline v./n. 下降；衰退 情景导学 The number of this rare species has declined sharply in recent decades. 近几十年来，这一珍稀物种的数量急剧下降。 用法归纳 on the decline 在下降，在衰退 即时训练 Many bird species are ________ the decline because of pollution. on 考点串讲 词汇精讲 8. reserve vt./n. 预留；保护区 情景导学 The government has built many nature reserves to protect endangered wildlife. 政府建立很多自然保护区保护濒危野生动植物。 用法归纳 nature reserve 自然保护区 即时训练 Many large nature _____________(reserve) have been set up for vulnerable animals.. reserves 考点串讲 句型精讲 Prohibiting illegal hunting, people are making great efforts to save endangered species. Sentence 1 prohibiting… 作伴随状语，逻辑主语为主句 people） 主句 译文：人们禁止非法捕猎，正竭尽全力拯救濒危物种。 即时训练 Knowing the importance of nature, we take action to protect wildlife. 了解大自然的重要性，我们采取行动保护野生动植物。 考点串讲 句型精讲 Many areas are home to endangered species which are in danger of dying out. Sentence 2 主句，谓语为:are home to which 引导定语从句修饰species 译文：很多地区是那些濒临灭绝的濒危物种的栖息地。 即时训练 This wetland is home to kinds of birds that are in danger of dying out. 这片湿地是多种濒临灭绝鸟类的栖息地。 . 。 考点串讲 句型精讲 It is vital for ordinary citizens to contribute to wildlife conservation. Sentence 3 It is +adj. + for sb. to do sth. it 作形式主语 译文：普通公民为野生动植物保护做出贡献是至关重要的。 即时训练 It is necessary for us to take action to protect fragile ecosystems. 对我们来说，采取行动保护脆弱的生态系统是十分必要的。 形式主语 不定式作真正主语 Unit 3 Conservation 单元语法 北师大版·选择性必修第一册 单元语法 限制性和非限制性定语从句 一、核心定义 定语从句：修饰主句中名词/代词（先行词），相当于形容词，分为两类： 限制性定语从句：对先行词必不可少限定，去掉后主句意思不完整，无逗号 非限制性定语从句：对先行词补充额外信息，去掉后主句意思完整，必须加逗号 单元核心考点：非限制性定语从句不能用that、关系词不可省略、可指代整件事 单元语法 二、核心五大区别（考试必考对照表） 对比维度 限制性定语从句 非限制性定语从句 逗号 无逗号 必须有逗号 引导词that ✅ 可用 ❌ 绝对禁用 关系词省略 作宾语可省略 ❌ 一律不可省略 修饰范围 仅修饰前面名词 可修饰名词 / 前面整句话 语义作用 限定、分类（缺一不可） 补充、说明（可有可无） 单元语法 三、分项精讲+对标例句（人际关系单元适配） 1. 限制性定语从句（无逗号） 用法：用来区分、限定先行词，告诉读者“哪一个” Eg. Friends who understand you are precious.懂你的朋友很珍贵。（限定：不是所有朋友，是懂你的朋友） 2. 非限制性定语从句（有逗号，写作高分核心） 用法：对已知人物/事物补充额外信息，不影响主句主干 Eg. We should cherish our true friends, who always support us.我们应该珍惜真挚的朋友，他们总会支持我们。（补充说明朋友的品质） 超高分用法：which指代整件事 Eg. He apologized to me sincerely, which helped fix our friendship.他真诚向我道歉，这修复了我们的友谊。（本单元写作万能句）。 单元语法 四、重点特例（考试最易丢分） 1. 专有名词、独一无二的人/物，后面只用非限制性（必须加逗号） ✅ Tom, who is my best friend, is very sincere. 2. 介词+关系代词：非限制性从句只用 whom / which，绝不用that ✅ I communicated with Tom, to whom I owed an apology. 3. 数词/代词+of+which/whom 只能用于非限制性从句 ✅ I have many friends, most of whom are easy-going. 单元语法 五、单元适配写作高分句型（可直接套用） You can have a sincere talk with your friend, which can clear up misunderstandings.你可以和朋友真诚沟通，这能消除误会。 2. We should learn to forgive others, which is the key to long-term friendship.我们应该学会包容他人，这是长久友谊的关键。 单元语法 即时训练（单句填空） The girl ____________ helped me is my best friend. I quarreled with my friend yesterday, ________ made me upset. My teacher, ________ we respect greatly, always gives us useful advice. who/that which whom 极简背诵口诀 有逗号，非限制，不用that，不省略； 无逗号，限制定，区分事物、定唯一。 Unit 3 Conservation 主题写作 北师大版·选择性必修第一册 主题写作 A “For” and “Against” Essay 主题写作：正反观点议论文 主题解读：For and Against Essay 即正反观点对比议论文。题型特点：针对某一社会现象/事物，客观阐述支持方优点和反对方弊端，最后给出个人观点，全程客观、逻辑清晰、结构固定。适配考点：总分总结构、非限制性定语从句、it形式主语、衔接词运用 主题写作 A “For” and “Against” Essay 主题写作：正反观点议论文 写作思路： 第一段：引入话题——点明当下热议现象，引出正反争议 第二段：正方观点（For）——支持者理由+具体优势（2点） 第三段：反方观点（Against）——反对者理由+具体弊端（2点） 第四段：个人观点——总结利弊，给出自己的客观看法 主题写作 正反观点议论文 开头段 中间段 结尾段 Recently, there has been a heated debate about ____(话题). 最近关于……出现了激烈的争议。 Opinions vary from person to person. 人们的观点各不相同。 Some people are in favor of it, which brings us many benefits.有些人对此表示支持，这能为我们带来诸多益处。（非限制性定语从句） It is beneficial for us to ____ and improve our efficiency. 这对我们……、提升效率很有帮助。（it形式主语） However, others hold the opposite opinion, which may cause some problems.然而，其他人持相反观点，这可能会引发一些问题。 They argue that it may bring some disadvantages and even affect our daily life.他们认为这会带来一些弊端，甚至影响日常生活。 We should treat it rationally and make full use of its advantages. 我们应理性看待，充分利用其优势。 Every coin has two sides. We should strike a balance between them. 事物皆有两面性，我们需要在两者之间寻求平衡。 主题写作 写作素材 3. 写作素材 ✅ 引入话题句型 Recently, there has been a heated debate about ____(话题). 最近关于……出现了激烈的争议。 Opinions vary from person to person. 人们的观点各不相同。 ✅ 正方（支持）通用句型 Some people are in favor of it, which brings us many benefits. 有些人对此表示支持，这能为我们带来诸多益处。（非限制性定语从句） It is beneficial for us to ____ and improve our efficiency. 这对我们……、提升效率很有帮助。（it形式主语） 主题写作 写作要点 ✅ 反方（反对）通用句型 However, others hold the opposite opinion, which may cause some problems. 然而，其他人持相反观点，这可能会引发一些问题。 They argue that it may bring some disadvantages and even affect our daily life. 他们认为这会带来一些弊端，甚至影响日常生活。 ✅ 个人观点结尾句型 We should treat it rationally and make full use of its advantages. 我们应理性看待，充分利用其优势。 Every coin has two sides. We should strike a balance between them. 事物皆有两面性，我们需要在两者之间寻求平衡。 主题写作 写作模板 Recently, there has been a heated debate about ____(写作话题). Opinions vary from person to person. Some people are in favor of it, which ____(正方优势). Firstly, it can ____(优点1). Besides, it is helpful for us to ____(优点2). However, others hold the opposite view. They think it may ____(弊端1). What’s worse, it will ____(弊端2), which is not good for our study and life. As far as I am concerned, every coin has two sides. We should treat it rationally and make good use of its benefits. 主题写作 写作练习 如今短视频备受学生追捧，请你以 The Advantages and Disadvantages of Short Videos 为题，写一篇正反观点议论文，词数100左右。 主题写作 写作范文 Recently, there has been a heated debate about short videos. Opinions vary from person to person. Some people are in favor of it, which enriches our spare-time life. Firstly, it can bring us relaxation and reduce our pressure. Besides, it is helpful for us to gain useful knowledge and latest information. However, others hold the opposite view. They think it may waste plenty of our time. What’s worse, it will distract us from our study, which is not good for our study and life. As far as I am concerned, every coin has two sides. We should treat it rationally and make good use of its benefits. Unit 3 Conservation 综合训练 北师大版·选择性必修第一册 综合训练 一、根据句意及汉语提示写出单词。 ●We should ________(保护) natural resources for future generations. ●Pollution ________(威胁) the survival of many native species. ●Scientists are trying to ________(修复) the damaged wetland. ●Many rare animals are protected in nature ________(保护区). ●Cutting down forests leads to the ________(灭绝) of some species. conserve threatens restore reserves extinction 综合训练 二、单句语法填空 ________(Realize) the risk, people began to protect local wildlife. Many ________(decline) species are in danger of dying out. The rule prohibits visitors from ________(hunt) any wild creatures here. Human activities contribute to many animals ________(lose) their habitats. Pollution spread across the river, ________(cause) serious damage to fish. Realizing declining hunting losing causing 综合训练 三、完成句子 根据单元短语补全句子，每空一词 Many rare animals are _____ _____ _____ _____ _____ (濒临灭绝的危险). This forest ________ ________ ________（是…… 的栖息地）various native birds. Human activities ________ ________(促成) the decline of wildlife. We should ________ ________ (采取行动) to protect fragile ecosystem. in danger of dying out is home to take action contribute to 综合训练 四、句型转换 按照要求改写句子，保持句意不变 People have realized the danger. They take measures to protect species.（合并为现在分词作状语） Realizing the danger, people take measures to protect species. 2. Many species may die out because of human damage.（用 in danger of 改写） Many species are in danger of dying out because of human damage. 3.It is very important for us to contribute to wildlife protection.（it 形式主语） It is vital for us to contribute to wildlife protection. 综合训练 五、短文语法填空阅读短文，填入合适单词或括号内动词不定式形式 Nowadays many native species 1.________(threaten) by human activities. 2._______(Realize) the serious situation, people begin to take action. Some species are 3.________ danger of dying out. Pollution contributes to many creatures 4.______(lose) their habitats. The government built nature 5._______(reserve) to protect wildlife. Strict rules prohibit people from 6._______(hunt) rare animals. Pollution spread across rivers, 7._______(bring) great harm to fish. We should try 8._________(conserve) fragile natural environment. This forest is home 9._______ lots of vulnerable species. Small actions can make a difference 10.________ conservation work. 1.are threatened 2.Realizing 3.in 4.losing 5.reserves 6.hunting 7.bringing 8.to conserve 9.to 10.to 感谢聆听 北师大版·选择性必修第一册 $