Unit 4 Amazing Plants and Animals 单元重点词汇变形分层必考90题- 2026-2027学年人教版八年级上册英语

**基本信息** 本专项按基础识记→能力提升→综合拓展三层梯度设计，全维度覆盖词汇音、形、义、变形及语境应用，系统提升语言能力与学习能力。 **专项设计** |模块|题量/典例|方法提炼|知识逻辑| |----|-----------|----------|----------| |基础识记|45题（音标写词20题+中文提示写词25题）|音形匹配解决拼读难题，中文释义巩固词义记忆|从音形关联到词义掌握，夯实词汇拼写根基| |能力提升|20题（词形转换）|词汇语法结合，针对性突破名词单复数、词性转换等变形失分点|连接词汇基础与语法应用，构建词形变化能力| |综合拓展|25题（语境首字母填空）|依托完整句子场景，训练单词辨析与固定搭配的灵活运用|从孤立记忆到语境应用，提升词汇综合语言运用能力|

答案解析 第一部分：基础识记层级（45 分） Ⅰ. 根据句意及音标提示写出单词（共20小题，每小题1分） 1. 答案：ocean。解析：音标 /ˈəʊʃn/ 对应名词ocean，意为海洋；the ocean 泛指地球上的海洋，符合海洋覆盖地表71%的语境。 2. 答案：role。解析：音标 /rəʊl/ 对应名词role，意为角色；固定搭配play an important role in 表示在……中起到重要作用，为中考高频短语。 3. 答案：without。解析：音标 /wɪˈðaʊt/ 对应介词without，意为没有；句意为我们离开水无法生存，逻辑通顺。 4. 答案：rose。解析：音标 /rəʊz/ 对应名词rose，意为玫瑰；母亲节赠送玫瑰是常见情景。 5. 答案：tool。解析：音标 /tuːl/ 对应名词tool，意为工具；词典是学习外语的实用工具。 6. 答案：Bamboo。解析：音标 /ˌbæmˈbuː/ 对应名词bamboo，意为竹子；位于句首首字母大写，后文说明竹子属于草本植物。 7. 答案：planet。解析：音标 /ˈplænɪt/ 对应名词planet，意为行星；问句询问距离太阳最近的行星。 8. 答案：honey。解析：音标 /ˈhʌni/ 对应不可数名词honey，意为蜂蜜；蜜蜂产出蜂蜜，词义唯一匹配。 9. 答案：believe。解析：音标 /bɪˈliːv/ 对应动词believe，意为相信；固定结构not…until 直到……才，符合句意。 10. 答案：weigh。解析：音标 /weɪ/ 对应动词weigh，意为称重；助动词did后必须使用动词原形。 11. 答案：butterfly。解析：音标 /ˈbʌtəflaɪ/ 对应名词butterfly，意为蝴蝶；修正题干音标书写小笔误，花园里看见蝴蝶飞舞。 12. 答案：appear。解析：音标 /əˈpɪə(r)/ 对应动词appear，意为出现；歌手登台亮相，用不定式to后接原形。 13. 答案：popular。解析：音标 /ˈpɒpjələ(r)/ 对应形容词popular，意为流行的；固定搭配be popular among 在……中受欢迎。 14. 答案：disappointing。解析：音标 /ˌdɪsəˈpɔɪnt/ 词根为disappoint；修饰事物名词result，用-ing形容词disappointing，表示令人失望的。 15. 答案：tiny。解析：音标 /ˈtaɪni/ 对应形容词tiny，意为微小的；显微镜用来观察微小细胞，贴合科学场景。 16. 答案：climate。解析：音标 /ˈklaɪmət/ 对应名词climate，意为气候；固定搭配climate change 气候变化。 17. 答案：importance。解析：音标 /ɪmˈpɔːtns/ 对应名词importance，意为重要性；固定结构the importance of ……的重要性。 18. 答案：communicate。解析：音标 /kəˈmjuːnɪkeɪt/ 对应动词communicate，意为交流；how to do 结构中用动词原形，communicate with sb 和他人沟通。 19. 答案：imagine。解析：音标 /ɪˈmædʒɪn/ 对应动词imagine，意为想象；主语I后直接用原形，畅想未来生活。 20. 答案：actually。解析：音标 /ˈæktʃuəli/ 对应副词actually，意为实际上；副词修饰整个句子，前后形成转折对比。 Ⅱ. 根据句意及汉语提示写出单词（共25小题，每小题1分） 1. 答案：ton。解析：汉语提示“吨”，可数名词ton；a ton of 一吨，修饰砖块。 2. 答案：action。解析：汉语提示“行动”，名词action；固定搭配take action 采取行动。 3. 答案：up to。解析：汉语提示“接近”，固定短语up to，描述飞蛾捕食蚊子的数量上限。 4. 答案：is home to。解析：汉语提示“是……的家乡”，固定短语be home to；主语the Amazon rainforest 为单数，be动词用is。 5. 答案：happiness。解析：汉语提示“幸福；快乐”，不可数名词happiness；定冠词the后接名词作句子主语。 6. 答案：protect。解析：汉语提示“保护”，动词protect；不定式to后用原形，protect eyes 保护眼睛。 7. 答案：per cent。解析：汉语提示“百分之……”，固定表达per cent，数字71修饰。 8. 答案：disappointed。解析：汉语提示“失望的”，-ed形容词disappointed，专门修饰人的内心感受。 9. 答案：wings。解析：汉语提示“翅膀”，可数名词wing；此处表泛指，使用复数形式wings。 10. 答案：land。解析：汉语提示“陆地”，名词land；on land 在陆地上，与海洋形成对比。 11. 答案：shoots。解析：汉语提示“幼苗；嫩芽”，名词shoot；谓语动词come为原形，主语用复数shoots。 12. 答案：goodness。解析：汉语提示“美德”，不可数名词goodness，作介词of的宾语。 13. 答案：take a walk。解析：汉语提示“散步”，固定短语take a walk；every morning为一般现在时，主语复数用原形。 14. 答案：is connected with。解析：汉语提示“与……相连”，固定搭配be connected with；主语the Internet单数，be动词用is。 15. 答案：In fact。解析：汉语提示“实际上”，固定短语in fact，句首单词首字母大写。 16. 答案：For this reason。解析：汉语提示“出于这个原因”，固定短语for this reason，句首大写。 17. 答案：plays a part in。解析：汉语提示“在……中发挥作用”，固定短语play a part in；主语AI为单数，谓语动词变三单plays。 18. 答案：except。解析：汉语提示“除了”，介词except，表范围排除。 19. 答案：lively。解析：汉语提示“精力充沛的”，形容词lively，修饰人物she。 20. 答案：ant。解析：汉语提示“蚂蚁”，名词ant；the ant 代表蚂蚁这一类生物。 21. 答案：humans。解析：汉语提示“人”，名词human，此处表泛指人类，用复数humans。 22. 答案：stored。解析：汉语提示“存储”，动词store；food和store是被动关系，be动词was后用过去分词stored。 23. 答案：connection。解析：汉语提示“联系”，名词connection；形容词close修饰名词。 24. 答案：connect。解析：汉语提示“连接”，动词connect；祈使句please后接动词原形。 25. 答案：In order to。解析：汉语提示“为了”，固定短语in order to，用来引导目的状语，句首大写。 第二部分：能力提升层级（20 分） 用括号内所给单词的适当形式填空（共20小题，每小题1分） 1. 答案：action。解析：括号单词act，take后需要名词；固定搭配take action 采取行动，故变形名词action。 2. 答案：to store。解析：括号单词store；固定结构use sth to do sth 使用某物去做某事，不定式表目的，填to store。 3. 答案：communication。解析：括号单词communicate；介词in后接名词，固定搭配keep in communication with 与……保持联系，变形名词communication。 4. 答案：importance。解析：括号单词important；定冠词the后需要名词，the importance of ……的重要性，变形名词importance。 5. 答案：tiniest。解析：括号单词tiny；in the universe 是大范围比较，形容词使用最高级tiniest，前面搭配the。 6. 答案：disappointed。解析：括号单词disappoint；系动词felt后接形容词，主语是人，用-ed形容词disappointed，表感到失望。 7. 答案：imagination。解析：括号单词imagine；介词of后接名词，imagine变形名词imagination，意为想象。 8. 答案：connection。解析：括号单词connect；定冠词the后接名词，the connection between A and B A与B之间的联系，变形名词connection。 9. 答案：belief。解析：括号单词believe；形容词性物主代词her后接名词，believe变形名词belief，意为想法、信念。 10. 答案：goodness。解析：括号单词good；介词of后接名词，good变形抽象名词goodness，意为美德。 11. 答案：butterflies。解析：括号单词butterfly；some后接可数名词复数，butterfly变复数butterflies。 12. 答案：African。解析：括号单词Africa；修饰名词zebra需要形容词，Africa变形形容词African，非洲的。 13. 答案：shot。解析：括号单词shoot；Once upon a time 为一般过去时，shoot的过去式是shot。 14. 答案：folding。解析：括号单词fold；修饰名词chair，用动名词作形容词folding，folding chair 折叠椅。 15. 答案：protection。解析：括号单词protect；形容词first-class后接名词，protect变形名词protection，意为保护。 16. 答案：livelier。解析：括号单词lively；much修饰形容词比较级，lively比较级livelier，意为更有活力的。 17. 答案：without。解析：括号单词with；结合句意“没有多年规划就无法实现梦想”，加否定前缀with→without，介词没有。 18. 答案：weight; weighed。解析：第一空，the后填名词，weigh变形weight（体重）；第二空，was提示过去时，weigh变过去式weighed。 19. 答案：disappear。解析：括号单词appear；句意希望交通堵塞消失，需要加否定前缀dis-构成disappear；will是情态动词，后面必须使用动词原形。 20. 答案：Actually。解析：括号单词actual；修饰整个句子要用副词，actual变形actually，句首首字母大写。 第三部分：综合拓展层级（25分） 根据句意及首字母提示补全单词（25 小题，每小题1分） 1. 答案：popular。解析：固定搭配be popular in 在……受欢迎，篮球是校内热门运动。 2. 答案：shot。解析：后半句became为一般过去时，shoot表示射击，过去式shot，对应后羿射日神话。 3. 答案：human。解析：human drivers 人类驾驶员，和driverless cars 无人驾驶车辆形成对比。 4. 答案：honey。解析：蜜蜂产出蜂蜜，honey为不可数名词，语境唯一匹配。 5. 答案：except。解析：except介词，意为除……之外，所有人去音乐会唯独我留下写作业。 6. 答案：land。解析：固定搭配on land 在陆地上，和海洋生物形成对比。 7. 答案：without。解析：without 没有，人类离不开水和空气，否定介词。 8. 答案：bamboo。解析：bamboo竹子，是熊猫的主要食物。 9. 答案：connection。解析：Wi-Fi connection 无线网络信号，岩石房间信号变弱。 10. 答案：communicate。解析：communicate with sb 和某人交流，to后使用动词原形。 11. 答案：disappointed。解析：feel后接形容词，修饰人内心失落，用disappointed。 12. 答案：imagine。解析：can是情态动词，后接动词原形imagine，想象无水的世界。 13. 答案：importance。解析：固定结构the importance of ……的重要性，人们生病才懂得锻炼的重要。 14. 答案：oceans。解析：four 四，可数名词ocean变为复数oceans，四大洋。 15. 答案：planets。解析：one of + 可数名词复数，planet变复数planets，火星是行星之一。 16. 答案：protect。解析：try one’s best to do sth 尽全力做某事，protect the Earth 保护地球。 17. 答案：role。解析：固定搭配play a role in 在……发挥作用，形容钟南山在抗疫中的贡献。 18. 答案：weighs。解析：主语an adult polar bear 是单数，一般现在时谓语动词变三单weighs，重达。 19. 答案：tiny。解析：tiny形容词微小的，小虫体型极小，很难在草丛中发现。 20. 答案：tool。解析：tool名词工具，锤子是修理木制品的工具。 21. 答案：lively。解析：lively形容词热闹的，傍晚广场有歌舞，充满生机。 22. 答案：climate。解析：climate气候，昆明常年凉爽，吸引游客。 23. 答案：provinces。解析：one of 后接名词复数，province变复数provinces，山东省是华东省份之一。 24. 答案：appear。解析：will后接动词原形，雨后湖面会出现彩虹。 25. 答案：believe。解析：believe动词相信，主语I后用原形，坚信努力可以改变未来。 学科网（北京）股份有限公司 $夯实词汇基础・突破变形考点・单元专项精练 人教版（新教材）八年级上册Unit 4 Amazing Plants and Animals 单元重点词汇变形分层90题 学校：______________ 班级：______________ 姓名：______________ （考试时间：50分钟 满分：90分） 资料说明 整套词汇专项按基础识记→能力提升→综合拓展三层梯度划分，由浅入深，完整覆盖音、形、义、变形、语境全维度考点： 1. 基础识记（45分）：内设音标写词、中文提示写词两类基础题型，先通过音标训练音形匹配，解决单词不会读、不会拼的难题；再结合中文释义巩固词义记忆，全覆盖单元核心四会单词，夯实拼写根基。 2. 能力提升（20分）：词形转换专项，囊括名词单复数、词性转换、时态变化、形副词转换等高频易错考点，词汇语法结合，针对性突破变形失分点。 3. 综合拓展（25分）：语境首字母填空，依托完整句子设置场景，考查单词辨析与固定搭配，训练学生结合上下文灵活运用词汇的能力。 第一部分：基础识记层级（45 分） Ⅰ. 根据句意及音标提示写出单词（共20小题，每小题1分） 1．The ________ /ˈəʊʃn/ covers about 71% of the Earth’s surface. 2．Parents play an important ________ /rəʊl/ in children’s education. 3．Water is important to us. We cannot live ________ /wɪˈðaʊt/ it. 4．Little Mary gave her mother a beautiful ________ /rəʊz/ as a gift on Mother’s Day. 5．A dictionary is a useful ________ /tuːl/ for learning a new language. 6．________ /ˌbæmˈbuː/ is not a tree but a kind of grass, and it can grow very fast. 7．Which ________ /ˈplænɪt/ is the nearest to the sun? 8．No bees（蜜蜂）, no ________ /ˈhʌni/, No work, no money. 9．I won’t ________ /bɪˈliːv/ you until I see with my own eyes. 10．—How much did the panda _________ /weɪ/ when it was born? —About 100 grams. 11．I saw a beautiful ________ /ˈbʌtəflaɪ/ flying in the garden. 12．The fans held their breath and waited for the singer to ________ /əˈpɪə(r)/ on stage. 13．Tik Tok (抖音) is becoming more and more ________ /ˈpɒpjələ(r)/ among young people. 14．All the teammates were upset about the ________ /ˌdɪsəˈpɔɪnt/ result. 15．The scientist used a ________ /ˈtaɪni/ microscope to study the cells in the lab. 16．More and more people are concerned about ________ /ˈklaɪmət/ change. 17．Aron tells us the ________ /ɪmˈpɔːtns/ of being in control of one’s life. 18．It’s important for us to learn how to _________ /kəˈmjuːnɪkeɪt/ with others. 19．I often __________ /ɪˈmædʒɪn/ what my life will be like in the future. 20．At first I thought the problem was hard, but ________ /ˈæktʃuəli/ it was quite easy. Ⅱ. 根据句意及汉语提示写出单词（共25小题，每小题1分） 1．The truck was carrying ‌a ________ (吨) of‌ bricks, weighing over two thousand pounds. 2．We can take ________ (行动) to make a great difference to the health of our planet Earth. 3．Moths are awake at night and can eat ________ ________ (接近) 1,200 mosquitoes in an hour. 4．The Amazon rainforest ________ ________ ________ (是……的家乡)‌ millions of species, many of which are still undiscovered. 5．The ________ (幸福；快乐) on the children’s faces made us feel warm. 6．We wear sunglasses to ________ (保护) our eyes from the sun. 7．Over seventy-one ________ (百分之……) of the Earth’s surface is covered by water. 8．My friend Kate didn’t pass the exam so she felt ________ (失望的). 9．My teachers always tell me that knowledge will give us ________ (翅膀) to fly high. 10．This animal cannot live on ________ (陆地). 11．In spring, fresh bamboo ________ (幼苗；嫩芽) come out from the ground and become a favorite dish for many people. 12．Bamboo is a symbol of ________ (美德) in Chinese culture. 13．Every morning, many people ________ ________ ________ (散步) along Erhai Lake to enjoy the fresh air. 14．The Internet ________ ________ ________ (与……相连) our daily life nowadays. 15．________ ________ (实际上), it’s not hard for us to find some sunshine every day in our lives. 16．________ ________ ________ (出于这个原因), we must take actions to protect blue whales. 17．AI ________ ________ ________ ________ (在……中发挥作用) many fields (领域) in our everyday life. 18．The workers in this factory have to work every day ________ (除了) some important festivals. 19．She is such a ____________ (精力充沛的) girl that she never feels tired with different kinds of activities. 20．The ________ (蚂蚁) is small, but it can lift things which weigh a lot more than its body. 21．People kill wolves because they think wolves are dangerous to ________ (人). 22．In ancient times, food was ________ (存储) up for winter. 23．The food in every country has a close ________ (联系) with its culture. 24．Please ________（连接）the printer to the computer. 25．________ ________ ________ (为了) develop children’s independence, parents should ask their children to do some housework at home. 第二部分：能力提升层级（20 分） 用括号内所给单词的适当形式填空（共20小题，每小题1分） 1．Before taking ________, we need to think about the problem carefully. (act) 2．People use many tools ________ (store) the food for the cold winter. 3．With the development of modern technology, we can keep in ________ (communicate) with our friends through the Internet. 4．Many people haven’t understood the ________ (important) of the wetlands. 5．It is written in a book that “What is ________ (tiny) thing in the universe? Probably no one knows.” 6．All the football fans on the playground felt ________ (disappoint) when they watched their team miss the goal. 7．Through the works of art, Van Gogh leads us into his world of ________. (imagine) 8．The ________ (connect) between smoking and heart disease is well-known. 9．My grandma never throws away old clothes. In her _________, they can still be useful. (believe) 10．Helping others is always a symbol of ________ (good) in Chinese culture. 11．Look, there are some ________ (butterfly) flying in the flower bush. 12．This is an ________ zebra and it eats leaves as well as grass. (Africa) 13．Once upon a time, there were ten suns in the sky. A man called Hou Yi ________ (shoot) nine of them. 14．That ________ (fold) chair is very convenient, and you can fold it up when you don’t use it. 15．China provides first-class ________ (protect) to tigers and pandas. 16．The boy looks much ________ (live) in the sports clothes and trainers. 17．A dream can’t come true ________ (with) years of planning and hard work. 18．—What was the ________ of your daughter when she was at birth? —She ________ about 2.5 kg. (weigh) 19．We hope the problems of traffic jams will ________ in the near future. (appear) 20．________, the movie is better than I have expected. (actual) 第三部分：综合拓展层级（25 分） 根据句意及首字母提示补全单词（共25小题，每小题1分） 1．Basketball is one of the most p________ sports in our school. Everyone likes it. 2．After Hou Yi s________ the ninth sun, people’s life became normal again. 3．Driverless cars will make fewer mistakes than h________ drivers do. 4．Bees are animals that make h________ for us. 5．Everyone e________ me went to the concert. I had to finish my homework at home. 6．Some animals live in the sea and some live on l________. 7．Water and air are very important for human beings. We can’t live w________ them. 8．The pandas at the zoo love eating b________, and they spend most of their time chewing it. 9．After you go into the room made of rocks, the Wi-Fi c________ gets quite weak. 10．We can use our body to c________ with each other without saying a word. 11．The new kung fu movie had boring fights and the story wasn’t interesting. We felt very d________ and left the cinema quickly. 12．Can you i________ a world without water? The land will be dry and nothing can grow. 13．Many people don’t realize the i________ of doing exercise until they become ill. 14．There are seven continents (洲) and four o_______ in the world. 15．Mars is one of the p________ that is much smaller than the sun. 16．We should try our best to p________ the Earth because it is our home. 17．Zhong Nanshan plays a very important r________ in fighting against COVID-19. 18．An adult polar bear w________ up to 1000 kilograms. 19. The little bug is so t________ that you can hardly find it in the grass. 20. A hammer is a useful t________ when you fix wooden things. 21. The park becomes l________ with music and dancers every evening. 22. Lots of tourists love Kunming for its cool c________ all year round. 23. Shandong is one of the largest p________ in East China. 24. When rain stops, a rainbow will a________ above the lake soon. 25. I strongly b________ hard work can change our future. 学科网（北京）股份有限公司 $