初中英语人教版（2024）九年级上册（2024）Unit 1 The Changing WorldSection A2a-2d课前预习课件ppt

这是一份初中英语人教版（2024）九年级上册（2024）Unit 1 The Changing WorldSection A2a-2d课前预习课件ppt，共22页。PPT课件主要包含了词根词缀拆解速记，Lead in，我国沙尘暴核心发源地，生态自然环境最脆弱，sandstorms，knowledge，shortages，technology，better，machines等内容，欢迎下载使用。
目录新单词预习 Vcabulary 课堂导入 Lead in 新知学习 Knwledge课堂巩固练习题 Exercise课堂小结 Summary分层课后作业 Hmewrk
1. sandstrm /ˈsændstɔːm/n. 沙尘暴复合词：sand（沙子）+ strm（暴风雨）→ 沙子风暴 → 沙尘暴2. farmland /ˈfɑːmlænd/n. 耕地复合词：farm（农田、耕作）+ land（土地） → 耕种的土地 → 耕地3. shrtage /ˈʃɔːtɪdʒ/n. 短缺词根：shrt（adj. 短的，不足的） 后缀：-age 名词后缀， 表 “状态、总量” shrt + -age → 不足的状态 → 短缺4. lack /læk/n. 缺乏原生词根，无拆分，可关联记忆：lack=lacks（缺少）5. bush /bʊʃ/n. 灌木基础单词，衍生：bushy adj. 灌木丛生的（-y 形容词后缀）
6. rt /ruːt/ n. 根核心词根：rt- 表 “根、根源”衍生：rted adj. 生根的；uprt v. 连根拔起（up - 向上 + rt 根）7. sil /sɔɪl/n. 土壤基础词，同根：siled adj. 沾泥土的8. sandy /ˈsændi/adj. 含沙的；铺满沙子的词根：sand n. 沙子 后缀：-y 形容词后缀，表 “充满… 的”sand + -y → 满是沙子的 → 含沙的9. gvernment /ˈɡʌvənmənt/n. 政府 词根链：gvern v. 统治、管理gvern + -ment → gvernment n. 管理机构 → 政府（-ment 名词后缀，表机构 / 行为）10. supprt /səˈpɔːt/n.&v. 支持前缀：sup- = sub- 向下、在底下 词根：prt 搬运、承载sup（在下方）+ prt（承载）→ 在底下托住 → 支撑、支持11. crn /kɔːn/n. 玉米；谷物 基础词根，无词缀拆分，固定记忆
翻译句子： The shrtage f water makes the sandy sil lse its rt, the gvernment gives supprt t grw crn n the farmland, stp sandstrm and prtect the bush.中文翻译 水资源短缺让沙质土壤流失根系，政府提供支持在耕地种植玉米，抵御沙尘暴、保护灌木。
综合科技创新水平相对最弱
田地（耕地）人均最短缺
1.全国沙尘气象数据显示，南疆塔里木盆地年沙尘暴日数全国第 一，局部区域年均沙尘超 50 天2.全省 70% 区域属于三江源、柴达木高寒干旱区：平均海拔 3000 米以上、氧气稀薄、全年低温、降水极少、植被恢复极慢、冻土广布，土地沙化、草原退化、水土流失风险全国最高；同时大范围戈壁荒漠，生存自然约束极强3.《中国区域科技创新评价报告 2025》全国 31 省区综合得分 排名，西藏常年垫底4.福建 “八山一水一分田”，山地丘陵占全省 80% 以上，平地极少； 人均耕地仅 0.58 亩，低于联合国 0.8 亩粮食安全警戒线
difficult envirnment
lack f technlgy
farmland shrtage
Rank the fllwing prblems frm 1 t 4, with 1 being the wrst.
Give yur reasns.
difficult envirnment
farmland shrtage
按马斯洛层级严重性排序farmland shrtage 耕地短缺 → 破坏生理需求（吃饭根本）difficult envirnment（缺水恶劣环境） → 同样冲击生理需求，次于耕地短缺3.sandstrms 沙尘暴 → 破坏安全需求，威胁稳定生存环境4.lack f technlgy 技术匮乏 → 仅限制顶层自我实现,不威胁生存
Listen t the cnversatin between Gerge’s father and Li Rui’s grandfather. What prblems in 2a did they mentin?
They mentined tw prblems —sandstrms and farmland shrtage.
difficult 、sandstrmsfarmland 、lack f 、
get 、fewer sandstrmshuge 、have 、
farmland / fields
Listen again and fill in the table. Hw has the envirnment affected lcal lives?
Listening Scripts
Bb: I'm amazed by hw green yur hmetwn has becme! Grandpa: Have yu seen the crn fields utside f the twn yet? Bb: Yeah!They're huge! Grandpa: There used t be sandstrms all the time, and the fields were getting smaller and smaller. Then, after ne big sandstrm, we decided t d smething. Bb: What did yu d? Grandpa: We fund a small bush. It had lng rts that culd hld the sil tgether. We began planting it in sandy areas. The gvernment prvided supprt t. Bb: Wasn't it difficult t plant s many bushes? Grandpa: Yes, it was. At the beginning, we wrked by hand. Later, we had machines t help. We have planted many bushes and trees since then. There are fewer sandstrms nw and the envirnment is getting better. It has als imprved ur lives. Everyne has becme richer and happier.
Discuss the changes in 1c. Hw d yu think they happened?
A: The area used t be cvered with sand.B: What did they d t slve this prblem? A: They planted bushes and trees. The land has becme ...
A: The area used t be cvered with sand.B: What did they d t slve this prblem? A: They planted bushes and trees. The land has becme rich and suitable fr farming. At first they wrked by hand, then machines gave them help. With the gvernment’s supprt, sil is well prtected. The difficult envirnment has ttally changed.
一、英汉互译sandstrms ___________________farmland shrtage ___________________lack f technlgy ___________________difficult envirnment ___________________固定沙土 ___________________手工劳作 ___________________政府扶持 ___________________长根系 ___________________
沙尘暴 耕地短缺 技术匮乏 恶劣环境hld the sil tgether wrk by handgvernment’s supprt lng rts
二、根据对话简答1.What tw serius prblems did the place have in the past? There were cnstant sandstrms and farmland was becming smaller and kind f bush did peple find? What’s its functin? A bush with lng rts. Its lng rts can hld the sil tgether t stp tw supprts did lcal peple get? The gvernment prvided supprt and later machines helped with planting.
根据所学内容，填入合适的单词或短语
Great changes have taken place in Li Rui’s hmetwn. In the past, peple spent 1.____________ getting t the twn. The bus ride t schl needed 2.____________ n bumpy rads. Peple 3.__________ g a lng way t visit dctrs because there was n 4.____________ here. There were n places fr 5. , and the hills were full f 6. . Nw everything is different. New rads cut the travel time t just 7. . It nly takes 8. t get t schl. A new 9.________ stands in the twn, and a 10.____________ is right dwn the street. Lts f trees are planted n hills, s they lk green and beautiful.
supermarket
（一）核心 4 大环境问题（2a）sandstrms 沙尘暴difficult envirnment 恶劣环境（缺水）farmland shrtage 耕地短缺lack f technlgy 技术匮乏（二）听力对话核心脉络（Past-Actin-Present 时间线）Past（过去困境） 常年沙尘暴、耕地不断缩减；农耕完全依靠人力劳作，无机械设备。Actin（治理措施） 寻找长根系灌木固定沙土，在沙地大规模种植；政府提供扶持；引入机器辅助种植。Present（现在改善） 玉米田面积广阔；大量灌木树木落地；沙尘暴减少、环境变好；居民生活富裕幸福。
（三）重点词汇 & 短语sandstrm n. 沙尘暴；farmland n. 耕地；bush n. 灌木；rt n. 根；sil n. 土壤 sandy adj. 含沙的；gvernment n. 政府；supprt n.&v. 支持；machine n. 机器 used t d 过去常常；hld the sil tgether 固定沙土；wrk by hand 手工劳作（四）核心语法used t + 动词原形:描述过去持续存在、现在已改变的状态 / 动作 例：There used t be sandstrms all the time. 过去这里常年沙尘暴。现在完成时 have/has + 过去分词：强调从过去持续到现在的结果 例：We have planted many bushes since then. 比较级 fewer（更少）、better（更好）体现环境前后变化
A 层 基础巩固（学困生）背诵本课 4 个环境类短语 + 10 个重点单词，中英抄写 2 遍；完整默写 2c 听力填空原文；熟读 2b 对话 3 遍，能通顺朗读。B 层 能力提升（中等生）完成课堂全部基础 + 提升练习题；背诵 2b 对话，脱稿口头复述过去、行动、现在三段变化；用 5 句话描述家乡环境的过去与现在（必须用上 used t、现在完成时）。