Unit8 知识点总结2025-2026学年沪教版八年级下册英语

2026-05-07
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沪教版八年级下册英语第8单元知识点总结 (黔东南州专用) 资料类型:知识点精讲 + 分层默写 + 易错突破 + 语法专练 + 写作模板 适用版本:沪教版(上海教育出版社) 适用地区:贵州省黔东南州 适用阶段:八年级下册|单元复习|期中期末备考 一.单元学习目标(核心素养版) 知识目标: 1.掌握本单元20个核心词汇的发音、词性、词义及中考常考词性转换。 2.熟练运用10个重点短语,能完成填空、造句、句型转换等中考题型。 3.熟记10个重点句子,能进行同义句转换与仿写。 4.精通原因状语从句(because/as/since/because of)用法,应对中考单选、句型转换、完成句子。 能力目标: 1.能读懂关于宇宙、外星生物、未知世界的叙事类短文。 2. 能运用本单元知识点写80–100词想象类短文。 3. 能正确区分易混点,避免中考常见失分。 情感目标: 1.培养探索未知、热爱科学的精神。 2. 引导理性思考,树立科学认知观。 二.单元知识思维导图 1.核心词汇:alien/astronaut/spaceship/mention/refuse/frighten等 2.重点短语:look out of / in fear / because of / run away等 3.重点句型:教材10个核心句 4.易错突破:because/because of;frightened/frightening;mention;refuse 5. 语法核心:原因状语从句(because/as/since/because of) 6. 写作应用:遇见鸟人(模板+句型+范文) 7. 分层巩固:词汇默写+短语句子+语法专练+单元小测 三.重点词汇背默 1.____________ n. 外星人;外星生物(alien) 2.____________ n. 宇航员(astronaut) 3.____________ n. 火箭(rocket) 4.____________ n. 宇宙飞船(spaceship) 5.____________ n. 不明飞行物(全称Unidentified Flying Object)(UFO) 6.____________ v. 俯冲(dive) 7.____________ n. 灌木(bush) 8.____________ v. 提到;说起(mention) 9.____________ adj. 害怕的;恐惧的(frightened) 10.____________ n. & v. 害怕;恐惧(fear) 11.____________ adj. 丑陋的;难看的(ugly) 12.____________ v. 拒绝(refuse) 13.____________ n. 生物;动物(creature) 14.____________ n. & v. 损坏;破坏(damage) 15.____________ n. & v. 碰撞;坠毁(crash) 16.____________ n. 维(构成空间的因素)(dimension) 17.____________ n. 胡言乱语(nonsense) 18.____________ adj. 模糊的(vague) 19.____________ v. 争论;辩论(argue) 20.____________ v. 使失望(disappoint) 四.词汇词性转换 + 易混词辨析 词性转换: 1. frighten v. 使害怕 → frightened adj.(人)感到害怕的 → frightening adj.(物)令人害怕的 2.disappoint v. 使失望 → disappointed adj.(人) → disappointing adj.(物) 3. refuse v. 拒绝 → refusal n. 拒绝 3.argue v. 争论 → argument n. 争论 4.damage v./n. 损坏 → damaged adj. 受损的 ## 易混词辨析 : 1.alien n. 外星人 / astronaut n. 宇航员 2.damage v. 损坏(可修) / crash v. 坠毁(不可修) 3. fear n./v. 害怕 / frightened adj. 感到害怕的 核心词汇固定搭配(★必背,贴合中考句型) 1.mention sth. to sb. 向某人提起某事(中考句型转换常考) 2.refuse to do sth. 拒绝做某事(中考单选、完成句子高频) 3.in fear 害怕地(中考完形、阅读理解常考短语) 4.because of + 名词/短语(中考完成句子必考) 五.重点句子背默 1.____________? 你对未知世界了解多少? 2.____________? 其他星球上可能有生命吗? 3.____________. 我确定昨晚有什么东西落在了山附近的森林里,因为我听到了一声巨响。 4.____________. 它很高,有一个圆圆的头和银色的身体。 5.____________. 既然没有其他人看到这些外星人,我拒绝相信你们。 6.____________. 这艘宇宙飞船因为损坏而无法飞行。 7.____________. 如果我非常清楚地记得一件事,我就会回到它发生的那一刻。 8.__________? 为什么我们不能像在空间的其他维度移动一样在时间中移动呢? 9.____________. 我们无法逃离当下。 10.____________. 结果,地球人和鸟人成为了朋友! 六.重点短语背默 短语 例句 1._______look out of Tina woke up at midnight and looked out of her window.(蒂娜半夜醒来,向窗外望去。) 2._______dive towards She saw a yellow light in the sky and it suddenly dived towards the ground.(她看到天空中有一道黄光,它突然向地面俯冲下来。) 3.____mention sth.to sb. Tina mentioned it to her brother Tom the next morning.(第二天早上,蒂娜把这件事告诉了她的弟弟汤姆。) 4.________hide behind They heard some strange voices, so they hid behind some bushes.(他们听到一些奇怪的声音,所以躲到了灌木丛后面。) 5._______keep quiet They hid behind some bushes and kept quiet.(他们躲在灌木丛后面,保持安静。) 6._________in fear The children saw the aliens and ran away in fear.(孩子们看到外星人,害怕地跑开了。) 7.______because of The spaceship was damaged because of a crash.(这艘宇宙飞船因为碰撞而损坏了。) 8.______run away When the aliens saw them, the children ran away quickly.(当外星人看到他们时,孩子们迅速跑开了。) 9._______speed up We need to speed up in order to get to the airport in time.(为了及时赶到机场,我们需要加快速度。) 10.______move about You can move about freely in all directions of Space.(你可以在空间的各个方向自由移动。) 七.易错点背默 1.易错点:because 与 because of 的用法辨析 用法分析: ①because 是连词,后面接完整的句子(主句+从句),表示“因为”,语气最强,可回答why引导的疑问句; ② because of 是介词短语,后面接名词、名词短语或代词,不能接句子,侧重“由于某种原因”。 易错例句: (错误)He didn’t go to school because the bad weather. (正确)He didn’t go to school because of the bad weather. / He didn’t go to school because the weather was bad. 【拓展】because 和 so 不能同时出现在同一个句子中(中文可同时说“因为…所以…”,英文不行)。 例:(错误)Because it rained, so we stayed at home. (正确)Because it rained, we stayed at home. / It rained, so we stayed at home. 2.易错点:frightened 与 frightening 的用法辨析 用法分析:① frightened 是形容词,修饰“人”,表示“感到害怕的”,主语是人;② frightening 是形容词,修饰“事物”,表示“令人害怕的”,主语是事物或事件。 易错例句: (错误)The children were frightening when they saw the aliens. (正确)The children were frightened when they saw the aliens. 【拓展】类似用法的词:excited(感到兴奋的,修饰人)/ exciting(令人兴奋的,修饰事物);surprised(感到惊讶的,修饰人)/ surprising(令人惊讶的,修饰事物)。 3.易错点:mention 的用法 用法分析:mention 是及物动词,常见搭配:mention sth. to sb.(向某人提起某事),不能说“mention sb. sth.”;其否定形式为 don’t mention it(不客气,用于回答感谢),注意与“拒绝相信”(refuse to believe)区分开。 易错例句: (错误)She mentioned me the news. (正确)She mentioned the news to me. 【拓展】mention 后面可接that从句,例:He mentioned that he had seen the UFO. (他提到他见过不明飞行物。) 4.易错点:refuse 的用法 用法分析:refuse 是及物动词,常见搭配:refuse to do sth.(拒绝做某事),不能接doing sth.;后面可接名词,表示“拒绝某物”。 易错例句: (错误)He refused going to the forest. (正确)He refused to go to the forest. (他拒绝去森林。) 【拓展】refuse 的名词形式是 refusal,例:His refusal made his parents sad. (他的拒绝让他的父母很伤心。) 八.语法点记忆 1.语法点及其用法 核心语法:原因状语从句(Adverbial clauses of reason) 定义:用来表示主句动作或状态发生原因的从句,回答“why”引导的疑问句,说明“为什么”。 (1)常用引导词:because, as, since(三者均表示“因为”,语气和用法有区别) ①because:语气最强,表“直接原因”,可放在句首或句中,回答why引导的疑问句;句首时,后面用逗号与主句隔开。 例句(教材原句):I’m sure something landed in the forest near the hills because I heard a loud noise last night. (我确定昨晚有东西落在山附近的森林里,因为我听到了一声巨响。) ②as:语气比because弱,表“双方都已知的原因”,意为“由于”,可放在句首或句中,句首时用逗号隔开。 例句(教材原句):As it was too late to go outside, Tina and her brother Tom decided to go and have a look the next day instead. (由于太晚不能出去,蒂娜和她的弟弟汤姆决定第二天再去看看。) ③since:语气比as更弱,表“已知的、显然的原因”,意为“既然”,通常放在句首,后面用逗号隔开。 例句(教材原句):Since no one else saw these aliens, I refuse to believe you. (既然没有其他人看到这些外星人,我拒绝相信你们。) (2)关键注意点: ①引导词because, as, since 后面必须接完整的句子(主谓结构); ②原因状语从句可放在主句前或主句后,放在主句前时,必须用逗号与主句隔开; ③because 和 so 不能同时使用(避免重复); ④because of 是介词短语,不是连词,不能引导从句,后面接名词/名词短语/代词(与because用法区分开,见易错点1)。 2.语法练习题 (一)单项选择 1. — Why did Tina and Tom go to the forest? — ______ Tina heard a loud noise there last night. A. Because B. As C. Since D. Because of 2. ______ no one else saw the aliens, Tom’s father refused to believe them. A. Because B. As C. Since D. Because of 3. The spaceship couldn’t fly ______ the damage. A. because B. as C. since D. because of 4. ______ it was raining, we stayed at home to read books. A. Because of B. As C. Unless D. Though (二)句型转换 1.He refused to believe her because no one else saw the aliens.(对划线部分提问) 2.The children ran away because they were frightened.(改为同义句) 3.Since it is too late, we can’t go out.(改为同义句) (三)完成句子 1.我们不能在森林里着陆,因为树木太多了。(用because of完成句子) We can’t land in the forest ______ ______ ______ ______. 2.既然你知道这个秘密,就不要告诉别人。(用since完成句子) ______ ______ ______ the secret, don’t tell it to others. 3.他拒绝帮助我们,因为他没有时间。(用because完成句子) He refused to help us ______ ______ ______ no time. (四)补充练习(中考真题风格) 1.The boy was ______ (frightening/frightened) to see the UFO. 2.The story is so ______ (frightening/frightened) that I can’t sleep. 3.He refused ______ (tell) us the truth. 4.She mentioned the plan ______ me.(填介词) 5. We didn’t go out ______ the rain.(填because或because of) 九.写作模板与高分范文(中考专用) 1. 基础模板: One day, I looked out of the window and saw ______. Suddenly, ______. I felt ______ because ______. As a result, ______. 2. 高分模板: Last night, when I was ______, I noticed ______. To my surprise, ______. I ______ because ______. From this experience, I learned that ______. 3. 高分范文: Meeting the Bird People Liz and Gus finally reached the landing site and saw Captain Troy, who looked worried because they had been away for long. Suddenly, they heard beautiful voices from the sky. They looked up and saw many bird people with colorful wings. They were friendly and kind. Liz began to sing to them because she wanted to show her kindness. The bird people joined her happily. As a result, the people from the Earth and Bird World became good friends. 4.写作评分标准 8-10分:内容完整,语法正确,运用本单元词汇、句型及原因状语从句,句式多样,有细节描写,书写工整。 5-7分:内容较完整,语法基本正确,能运用部分本单元词汇、句型,句式单一,细节较少,书写较工整。 0-4分:内容不完整,语法错误较多,未运用本单元知识点,句式混乱,书写潦草。 十、参考答案与详细解析 一、重点词汇背默答案 1.alien 2. astronaut 3. rocket 4. spaceship 5. UFO 6.dive 7. bush 8. mention 9. frightened 10. fear 11.ugly 12. refuse 13. creature 14. damage 15. crash 16.dimension 17. nonsense 18. vague 19. argue 20. disappoint 二、重点句子背默答案 1.How much do you know about the unknown world? 2.Is there possibly life on other planets? 3.I’m sure something landed in the forest near the hills because I heard a loud noise last night. 4.It was tall with a round head and a silver body. 5.Since no one else saw these aliens, I refuse to believe you. 6.The spaceship couldn’t fly because of the damage. 7.If I remember something very clearly, I will return to the moment when it happened. 8.Why can’t we move through time like we move through other dimensions of space? 9.We cannot escape the present. 10.As a result, the people from the Earth and the Bird People became friends! 三、语法练习题答案 + 解析 (一)单项选择 1.A解析:回答 why 疑问句,必须用 because。 2.C解析:表示 “既然”,已知显然的原因,用 since。 3.D解析:the damage 是名词短语,用 because of。 4.B解析:表示 “由于”,已知原因,用 as。 (二)句型转换 1.Why did he refuse to believe her? 解析:对 because 引导的原因状语提问,用 why。 2.The children ran away because of fear. 解析:because + 句子 = because of + 名词。 3.As it is too late, we can’t go out. / It is too late, so we can’t go out. 解析:since 可与 as 替换;也可改用 so 句式。 (三)完成句子 1.because of too many trees 2.Since you know 3.because he has (四)补充练习 1.frightened 解析:修饰人,感到害怕的。 2.frightening 解析:修饰物,令人害怕的。 3.to tell 解析:refuse to do sth. 固定搭配。 4.to 解析:mention sth. to sb. 固定搭配。 5.because of 解析:the rain 是名词短语。 学科网(北京)股份有限公司 $

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Unit8 知识点总结2025-2026学年沪教版八年级下册英语
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Unit8 知识点总结2025-2026学年沪教版八年级下册英语
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Unit8 知识点总结2025-2026学年沪教版八年级下册英语
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