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Unit 3 Trees and us 写作学案 【写作导引】 本单元以“Trees and us”为核心话题,围绕“树木的重要性、树木的特性、保护树木的方法”展开,核心聚焦“用英语说明树木的作用、描述树木相关活动、提出保护树木的建议”,运用现在进行时、形容词后缀-ful/-less 等基础语法,搭配树木相关核心词汇与简单句型,提升七年级学生的说明类写作连贯性和逻辑表达力。常见写作角度包括:① 说明树木对人类与自然的重要性;② 描述植树节活动或护树行动;③ 分享树木的神奇特性;④ 仿写课本“树木保护”风格的短文。所有内容严格贴合课本话题、词汇与语法要求,适配七年级学生认知水平,可直接用于课堂同步训练。 【单元话题】 “树木的重要性与保护”。请根据课本“Writing”板块范例,写一篇关于树木的短文,包括树木的作用、人类对树木的破坏及我们该如何保护树木,词数80-100左右,题目为“Why We Need to Protect Trees”。 _ 【范文】 Why We Need to Protect Trees Trees are our silent friends and play a vital role in our world. We can’t imagine life without them. Trees are very useful to all living things. They take in greenhouse gases like CO₂ and produce oxygen, which keeps the air clean. They provide food such as fruits and materials like wood for furniture and paper. Forests are also safe homes for animals and insects. However, humans are cutting down too many trees and polluting the air and water, which harms them greatly. We must protect trees. We can plant more saplings on Tree Planting Day, reuse paper to save wood, and stop cutting down forests. Let’s work together to protect our green friends and make the Earth more beautiful! 【译文】 为什么我们需要保护树木 树木是我们沉默的朋友,在我们的世界中扮演着至关重要的角色。我们无法想象没有树木的生活。 树木对所有生物都非常有用。它们吸收二氧化碳等温室气体,产生氧气,保持空气清新。它们提供水果等食物,以及木材等用于制作家具和纸张的材料。森林也是动物和昆虫的安全家园。然而,人类砍伐了太多树木,还污染空气和水,这对树木造成了极大伤害。 我们必须保护树木。我们可以在植树节种植更多树苗,重复使用纸张以节约木材,停止砍伐森林。让我们共同努力,保护我们的绿色朋友,让地球变得更美丽! 亮点词块 1.silent friends 沉默的朋友 2.vital role 至关重要的角色 3.take in 吸收 4.greenhouse gases 温室气体 5.produce oxygen 产生氧气 6.plant saplings 种植树苗 7.cut down 砍伐 高分句子 1.They take in greenhouse gases like CO₂ and produce oxygen, which keeps the air clean.(贴合单元核心知识,说明树木的生态作用,逻辑清晰) 2.However, humans are cutting down too many trees and polluting the air and water, which harms them greatly.(用however表转折,点出树木面临的危机,衔接自然) 3.We can plant more saplings on Tree Planting Day, reuse paper to save wood, and stop cutting down forests.(用并列结构列出护树行动,具体可行,符合七年级写作要求) 【拓展1】 班级要制作“护树行动手册”,请你写一段文字介绍植树节当天的植树活动,包括活动过程、你的分工及活动感受,词数不少于70。 My Tree Planting Day Experience _ 【拓展1范文】 My Tree Planting Day Experience March 12 is Tree Planting Day. Last year, I joined my classmates to plant trees in People’s Park, and it was a meaningful experience. When we arrived, we divided into groups. My job was to dig holes with a shovel. At first, it was hard work, but I didn’t give up. After digging three deep holes, my teammates put saplings into them. We held the saplings straight while filling the holes with soil. Finally, we watered the young trees carefully. Some classmates even made name cards for the saplings to wish them grow well. Though we felt tired and sweaty, we were all happy. I realized that planting trees is not easy, and we should cherish every tree. Protecting trees means protecting our home. 【拓展1译文】 我的植树节经历 3月12日是植树节。去年,我和同学们一起去人民公园植树,那是一次很有意义的经历。 到达后,我们分成了小组。我的任务是用铲子挖坑。一开始,这活儿很费力,但我没有放弃。挖好三个深坑后,我的队友们把树苗放进坑里。我们扶直树苗,同时用泥土把坑填满。最后,我们仔细地给小树苗浇了水。有些同学还为树苗制作了名字卡片,祝愿它们茁壮成长。 虽然我们又累又出汗,但都很开心。我意识到种树并不容易,我们应该珍惜每一棵树。保护树木就是保护我们的家园。 【拓展2】 请根据以下提示,仿写“树木的神奇特性”的短文,运用本单元核心语法,词数80左右,开头已给出。 提示 信息 核心内容 树木的特性(能交流、互相帮助、感知危险)、科学家发现(通过树根传递信息)、我们的感悟(应敬畏树木) 语言要求 运用现在进行时、形容词,贴合单元语法重点 Trees are more amazing than we think. They are not just silent plants—they have many surprising abilities. _ 【拓展2范文】 Trees are more amazing than we think. They are not just silent plants—they have many surprising abilities. Scientists have found that trees can communicate with each other. They send messages through their roots when they are in danger. For example, if insects are eating a tree’s leaves, it will warn nearby trees to produce a special liquid to keep insects away. Healthy trees also share nutrients with sick or young trees. Right now, many trees are working together to survive in forests. These facts make me realize that trees are intelligent living things. We should respect and protect them, for they are an important part of our ecosystem. 【拓展2译文】 树木比我们想象的更神奇。它们不仅仅是沉默的植物——它们有许多令人惊讶的能力。 科学家发现树木之间可以交流。当它们处于危险中时,会通过树根传递信息。例如,如果昆虫在吃一棵树的叶子,它会警告附近的树产生一种特殊的液体来驱赶昆虫。健康的树木还会与生病或年幼的树木分享养分。此刻,森林里的许多树木正在共同努力生存。 这些事实让我意识到树木是有智慧的生物。我们应该尊重和保护它们,因为它们是我们生态系统的重要组成部分。 本话题作文的一些实用短语与句型积累 一、核心主题词汇 1.树木与生态相关(单元重点) 树木部位:branch 树枝;leaf(复数leaves)叶子;root 树根;trunk 树干;sapling 树苗;fruit 果实 树木作用:produce oxygen 产生氧气;take in CO₂ 吸收二氧化碳;provide wood 提供木材;purify air 净化空气;protect soil 保护土壤;be home to 是……的家园 语法相关:现在进行时(am/is/are + doing);形容词后缀-ful(useful 有用的;harmful 有害的);形容词后缀-less(useless 无用的;harmless 无害的) 护树行动:plant trees 种树;dig holes 挖坑;water saplings 给树苗浇水;reuse paper 重复使用纸张;stop cutting down forests 停止砍伐森林;protect trees 保护树木 1. 语法相关(单元重点) 现在进行时用法: 表示正在发生的动作:Scientists are studying tree communication.(科学家们正在研究树木的交流方式。) 表示现阶段正在进行的动作:We are planting more trees this month.(这个月我们正在种更多的树。) 动词-ing形式变化: 一般动词+ing:plant planting;water watering 以不发音e结尾去e+ing:produce producing;purify purifying 重读闭音节双写尾字母+ing:dig digging;cut cutting 形容词后缀-ful/-less: 名词+ful(表“充满……的”):use useful;harm harmful;care careful 名词+less(表“没有……的”):use useless;harm harmless;home homeless 1. 表达类(单元基础) 逻辑连接:and 和;but 但是;however 然而;for example 例如;so 所以;because 因为;right now 此刻 常用短语:play a vital role 扮演至关重要的角色;cut down 砍伐;pollute the air and water 污染空气和水;Tree Planting Day 植树节;fill...with... 用……填满……;warn...to... 警告……去……;share...with... 与……分享…… 二、实用句型积累 1.说明树木的重要性(贴合单元核心) Trees are our...friends. They play a vital role in... 树木是我们……的朋友,它们在……中扮演着至关重要的角色,例:Trees are our green friends. They play a vital role in keeping the Earth healthy.(树木是我们的绿色朋友,它们在维护地球健康中扮演着至关重要的角色。) They can...and... 它们能……和……,例:They can take in harmful gases and produce clean oxygen.(它们能吸收有害气体,产生洁净的氧气。) Forests are home to... 森林是……的家园,例:Forests are home to thousands of animals and plants.(森林是成千上万动植物的家园。) 1. 描述护树活动(贴合单元主题) On Tree Planting Day, we... 植树节那天,我们……,例:On Tree Planting Day, we went to the hill and planted many saplings.(植树节那天,我们去了山上,种了很多树苗。) First, we...Then, we...Finally, we... 首先,我们……然后,我们……最后,我们……,例:First, we dug holes. Then, we put saplings in them. Finally, we watered them carefully.(首先,我们挖坑。然后,我们把树苗放进去。最后,我们仔细浇水。) Though we felt..., we were very happy. 虽然我们感到……,但我们很开心,例:Though we felt tired, we were very happy to see the young trees standing straight.(虽然我们感到累,但看到小树苗笔直站立,我们很开心。) 1. 提出护树建议与感悟(贴合单元内涵) We must/should...to protect trees. 我们必须/应该……来保护树木,例:We should reuse paper and stop cutting down forests to protect trees.(我们应该重复使用纸张,停止砍伐森林来保护树木。) Trees are...and we can’t live without them. 树木是……,我们没有它们就无法生存,例:Trees are important for our planet and we can’t live without them.(树木对我们的星球很重要,我们没有它们就无法生存。) Protecting trees means protecting... 保护树木意味着保护……,例:Protecting trees means protecting our own home.(保护树木意味着保护我们自己的家园。) 三、课堂实用句型 提问句型:What do trees do for us?;How can we protect trees?;What amazing facts do you know about trees?;What did you do on Tree Planting Day?;Why are trees important to our planet? 回答句型:Trees produce oxygen and provide food.;We can plant trees and reuse paper.;Trees can communicate with each other.;I planted saplings with my classmates.;Because they keep the air clean and protect soil. 学科网(北京)股份有限公司 $