Unit 3 Trees and us 知识清单-2025-2026学年沪教版英语七年级下册

该初中英语知识清单系统梳理沪教版七年级下册Unit 3“Trees and us”内容，涵盖单元主题目标、核心词汇、重点短语、句型、语法及写作指导，围绕“树木与环境保护”主题，搭建从词汇分类、语法规则到话题写作的递进式学习支架。 清单通过分类呈现词汇（名、形、动等）、分级讲解语法（现在进行时用法及易错提醒），关联语言知识与环保主题，如“provide用法”结合树木作用实例，培养语言能力和思维品质。设计词性转换表、重点句型功能分类（描述重要性、呼吁保护等），学生可自主系统复习，教师可直接用于课堂教学，提升教学实效。

沪教版七年级英语下册 Unit 3 Trees and us 知识清单 一、单元主题与目标 主题范畴：人与自然 —— 树木的重要性与环境保护 核心问题：为什么树木对我们很重要？ 学习目标：能够谈论树木的重要性，描述树木的作用，提出保护树木的方法 二、核心词汇 1. 名词（树木及其组成部分） 英文 中文 英文 中文 tree 树；树木 branch 树枝 root 根；根茎 leaf (pl. leaves) 叶子 trunk 树干 forest 森林 wood 木；木头 furniture （可移动的）家具 oxygen 氧；氧气 product 产品；制品 species 种；物种 side 一面 hole 洞；孔；坑 stick 棍；条 environment 自然环境 human 人；人类 2. 形容词 英文 中文 英文 中文 silent 不说话的；沉默的 convenient 便利的；方便的 important 重要的 useful 有用的 necessary 必要的；必需的 fresh 新鲜的 clean 干净的 harmful 有害的 wooden 木质的 environmental 环境的 3. 动词 英文 中文 英文 中文 create 创造 overlook 忽略；未注意到 treat 以……态度对待 communicate 交流；沟通 borrow 借；借用 dig 掘（地）；挖（洞） spread 传播 provide 提供 produce 生产；产生 protect 保护 absorb 吸收 harm 伤害；损害 save 拯救；节约 pollute 污染 reuse 重复利用 recycle 回收利用 4. 其他核心词汇 英文 中文 英文 中文 knowledge 知识；学问 character 文字 translation 译文；译本 accident 意外；偶然的事 culture 文化 legend 传说 5. 词性转换 词性 单词 转换形式 形容词→名词 silent silence (n. 沉默) 形容词→副词 silent silently (adv. 沉默地) 动词→名词 create creation (n. 创造)；creator (n. 创造者) 动词→形容词 create creative (adj. 有创造力的) 动词→名词 communicate communication (n. 交流) 动词→名词 produce production (n. 生产) 名词→形容词 wood wooden (adj. 木质的) 名词→形容词 accident accidental (adj. 意外的) 形容词→副词 accidental accidentally (adv. 意外地) 名词→形容词 knowledge knowledgeable (adj. 知识渊博的) 三、重点短语 1. 树木的作用与重要性 英文 中文 take in 吸收；摄入 produce oxygen 产生氧气 greenhouse gases 温室气体 create a clean environment 创造洁净的环境 provide sb. with sth. 为某人提供某物 provide sth. for/to sb. 向某人提供某物 make our lives more convenient 使我们的生活更方便 be important for 对……重要 be good for 对……有好处 a safe place for...to live ……生活的安全场所 2. 树木制品 英文 中文 be made of 由……制成（看得出原材料） be made from 由……制成（看不出原材料） come from 来自 be made of wood 由木材制成 forest-friendly products 森林友好型产品 3. 保护树木 英文 中文 cut down 砍倒；砍伐 cut down forests 砍伐森林 call on sb. to do sth. 号召某人做某事 stop cutting down trees 停止砍伐树木 protect trees 保护树木 save the planet 拯救地球 harm trees 伤害树木 do harm to 对……有害 write/print on both sides 双面书写/打印 reuse paper 重复使用纸张 borrow...from... 从……借入 4. 其他重要短语 英文 中文 to begin with 首先；第一点 look around 环视；环顾 in fact 事实上；实际上 for example 例如 according to 据……所说；按……所报道 by accident 偶然；意外地 communicate with 与……沟通 ask each other for help 互相求助 date back to 追溯到 spread across 传遍 四、重点句型 1. 描述树木的存在与普遍性 From the deepest forests to our towns and cities, trees are all around us. 从最深的森林到我们的城镇和城市，树木无处不在。 We share our world with trees. 我们与树木共享这个世界。 2. 描述树木的重要性 To begin with, forests are a safe place for animals, insects, and plants to live. 首先，森林是动物、昆虫和植物生活的安全场所。 Trees are also good for us humans because they take in greenhouse gases like CO₂ and produce oxygen. 树木对我们人类也有好处，因为它们会吸收二氧化碳等温室气体并产生氧气。 This means they help create a clean environment for everyone on this planet. 这意味着它们有助于为地球上的每个人创造一个干净的环境。 3. 描述树木对人类生活的贡献 Trees make our lives more convenient. 树木使我们的生活更加方便。 Just look around your room. A lot of the furniture is made of wood. 看看你的房间，很多家具都是木头做的。 Trees also provide us with delicious fruit and wonderful drinks. 树木也为我们提供了美味的水果和很棒的饮料。 4. 表达树木与人类的关系 They are our silent friends, but we often overlook them. 它们是我们的无声朋友，但我们常常忽视它们。 Trees do so much for us. We can’t imagine a world without them. 树木为我们做了很多。我们无法想象没有它们的世界。 5. 描述对树木的威胁 However, humans are not treating trees in a kind way. 然而，人类并没有善待树木。 We are cutting down forests all around the world. 我们正在砍伐世界各地的森林。 We are polluting the water and the air, and this harms trees. 我们正在污染水和空气，这损害了树木。 6. 呼吁保护树木 We need to do more to protect trees and save our planet. 我们需要做更多的事情来保护树木和拯救我们的星球。 五、语法知识：现在进行时（The Present Continuous Tense） 1. 定义与用法 用法 说明 例句 表示此刻正在进行的动作 说话瞬间正在发生 I am doing my homework now. 表示现阶段正在进行的动作 当前一段时间内持续，但此刻未必进行 He is writing a report on trees these days. 表示按计划将要发生的动作 用于go, come, leave等位移动词 We are leaving for Shanghai tomorrow. 2. 常用时间状语 时间状语 例句 now / right now I am reading a book now. at the moment She is cooking at the moment. these days We are planting trees these days. Look! / Listen! Look! The bird is singing. Be quiet! Be quiet! The baby is sleeping. 3. 谓语结构 句型 结构 例句 肯定句 主语 + am/is/are + 现在分词 I am writing. He is running. 否定句 主语 + am/is/are + not + 现在分词 She is not (isn’t) sleeping. 一般疑问句 Am/Is/Are + 主语 + 现在分词 Are you listening to me? 特殊疑问句 疑问词 + am/is/are + 主语 + 现在分词 What are you doing? 4. 现在分词（-ing形式）的构成规则 情况 变化规则 例词 一般情况 直接加 -ing work → working, play → playing 以不发音的-e结尾 去e加 -ing write → writing, take → taking 以 ie 结尾 变 ie 为 y，再加 -ing lie → lying, die → dying 重读闭音节结尾（辅-元-辅结构） 双写末尾辅音字母，再加 -ing run → running, swim → swimming, put → putting, begin → beginning 5. 不用进行时的动词（状态动词） 以下动词通常不用于现在进行时，而用一般现在时： 类别 常用动词 感官动词 see, hear, smell, taste, feel 情感/喜好 like, love, hate, prefer 认知/观点 know, believe, understand, think, remember, forget 所属关系 have (有), belong to, own 存在状态 be, seem, appear, look (看起来) 对比： √ I know the answer. (知道是一种认知状态，不用进行时) X I am knowing the answer. √ She likes this poem. (喜好是常态) X She is liking this poem. 例外：如果have表示“举行、度过、吃饭”等动作含义，可以用进行时： √ They are having a meeting now. (举行会议) √ She is having dinner. (吃饭) 6. 易错提醒 错误用法 正确用法 说明 I am wanting to go. I want to go. want 不用进行时 She is knowing the truth. She knows the truth. know 不用进行时 He is being tall. He is tall. be 描述特征不用进行时 They are having a car. They have a car. have 表“拥有”时不用进行时 六、重点词汇用法详解 1. provide 的用法 搭配 结构 例句 provide sb. with sth. 为某人提供某物 Trees provide us with oxygen. provide sth. for/to sb. 向某人提供某物 Trees provide oxygen for us. 注意：provide 强调“提供所需之物”，与offer（主动提出）、supply（供应）有细微差别。 2. be made of vs. be made from 短语 含义 区分 例句 be made of 由…制成 看得出原材料 The desk is made of wood. (能看出是木头) be made from 由…制成 看不出原材料 Paper is made from wood. (已看不出木头形态) 3. take in 的用法 含义 例句 吸收（气体/液体） Trees take in CO₂ and produce oxygen. 收留；收容 The kind family took in the homeless dog. 理解；领会 It was hard to take in all the information. 4. cut down 的用法 含义 例句 砍倒（树木） People cut down too many trees. 减少（数量/开支） We should cut down the use of paper. 注意：接名词时可放在down前后均可，接代词时必须放在中间：cut it down (√) / cut down it (X) 5. communicate 的用法 搭配 含义 例句 communicate with sb. 与某人交流 Trees can communicate with each other. communicate sth. to sb. 把某事传达给某人 She communicated her ideas to the team. 6. call on 的用法 搭配 含义 例句 call on sb. to do sth. 号召某人做某事 Let’s call on people to save trees. call on sb. 拜访某人 I will call on my teacher tomorrow. 7. by accident 的用法 含义：偶然；意外地（相当于 accidentally） 反义词：on purpose (故意地) 例句：According to a legend, Shennong discovered tea by accident. 8. according to 的用法 含义：根据；据……所说 注意：不能与 in my opinion 混用，according to 引述他人观点 例句：According to the report, trees can warn each other of danger. 七、话题写作指导 1. 话题词汇 树木的作用：provide, produce oxygen, take in, create a clean environment, make our lives convenient 树木制品：be made of wood, furniture, paper, come from trees 保护树木：protect, save, plant trees, reuse paper, cut down, call on 2. 常用句型 Trees are important to us because... To begin with, trees can... Trees also provide us with... We can’t imagine a world without trees. However, humans are not treating trees well. We need to do more to protect trees. Let’s call on people to... 3. 写作范例 Why Are Trees Important? Trees are our silent friends, but we often overlook them. In fact, they are very important to us. To begin with, forests are a safe place for animals and plants to live. Trees also provide us with many things in our daily life. A lot of furniture is made of wood, and paper comes from trees as well. Besides, trees take in greenhouse gases and produce oxygen. This helps create a clean environment for everyone. However, humans are not treating trees in a kind way. We are cutting down too many forests and polluting the air and water. We need to do more to protect trees and save our planet. Let’s call on people to plant more trees and stop wasting paper! 1 学科网（北京）股份有限公司 $