Unit 4 Amazing Plants and Animals（上）-2026-2027学年八年级英语上册知识点精讲（人教版）

Unit 4 Amazing Plants and Animals 知识点精讲（上） popular tool actually appear land feel free to do ⊙单元核心词汇 weigh believe connect,connected,be connected with without imagine disappointed connection 。单元同步语法 形容词最高级（-est/most形式) 。单元文章对话 重点句型讲练 教材同步词汇全解全练 重点1 单元词汇 1.popular/'popjele(r)/adj受欢迎的；流行的 词形变化：popularity(n.受欢迎)；popularly(acw.普遍地) 搭配：be popular with受.欢迎 例句：This song is popular with young people..这首歌在年轻人中很受欢迎。 2.tool /tu:I/n.工具；器具 搭配：a tool for doing sth..做某的工具 例佝：A hammer is a useful tool.锤子是一种有用的工具。 3.actually/'eektfueli/adv.实际上；事实上 词形变化：actual(ad.实际的) 例句：Actually,I don't know the answer..实际上，我不知道答案。 4.appea司/epra(r)lv.出现；显得 词形变化：appearance(n.外观；出现)；disappear(.消失) 搭配：appear to do sth.似乎做某事 例句：The sun appears in the east..太阳出现在东方。 5.and /laend/n.陆地；土地v.着陆；降落 词形变化：landing(n.着部陆) 搭配：on land在陆地上；land on降落于 例句：The plane will land at8o'cIock.飞机将在8点着陆。 6.feel free to do/fi:lfri:tu:du:/短语.随意做某事；尽管做某事 词形变化：feel(v.感觉)；free(adj.自由的) 例句：Feel free to ask me any questions.尽管问我任何j问题。 7.weigh/wer/V.称的重量；有.重 词形变化：weight(n.重量)；weighs(第三人称单数 搭配：weigh..kilos重.公斤 例句：The elephant weighs about5,000 kilos.这头大象重约5000公斤。 8.believe /br'li:V/V.相信；认为 词形变化：belief(n.信念)；believable(adj.可信的)；unbelievable(adj.难以置信 的) 搭配：believe in信任；believe it or not信不信由你 例佝：I believe you can do it..我相信你能做到。 9.connect/ke'nekt/v.连接；联系 词形变化：connected(ad.连接的；有联系的)；connection(n.连接；联系)； disconnect(v.断开) 搭配：connect Ato/with B把A和B连接起来；be connected with与有联系 例句：The bridge connects the two cities.这座桥连接两个城市。 The two events are connected with each other..这两个事件相互关联。 10.without/w'δat/prep.没有；不 搭配：without doing sth..没有做某事 例句：She went to school without breakfast..她没吃早餐就去上学了。 11.imagine'meed3rnlv.想象；设想 词形变化：imagination(n.想象力)；imaginative(adj.富有想象力的) 搭配：imagine doing sth.想象做某事 例佝：Can you imagine living on the moon'?你能想象在月球上生活吗？ 12.disappointed/,se'porntrd/adj.失的；沮丧的 词形变化：disappoint(v.使失望)；disappointment(n.失望)；disappointing(adj, 令人失望的) 搭配：be disappointed with/at/in对.…感到失望 例句：He was disappointed with the result..他对结果感到失望。 考点通关 单元词汇 (一)单句填空（用所给词的适当形式填空） 1.This game is very (popular)with children. 2.A knife is a useful (tool)in the kitchen. 3 (actual),he is not a teacher but a doctor. 4.The first stars (appear)in the sky at night. 5.The bird can fly over the (land)and sea 6.Please (feel free to)ask me if you have any questions. 7.The bag (weigh)about 10 kilos 8.1 (believe)that we will win the game. 9.The two cities are (connect)by a high-speed railway 10.Don't go out_ (without)an umbrella;it's raining. 11.Can you (imagine)a world without trees? 12.She felt (disappoint)because she lost the game. 13.There is a strong (connect)between exercise and health 14.The computer is (connect)with the printer. 15.You should believe (in)yourself. (二)短文填空 Do you know the Great Wall?It is one of the most 1. (popular)places in China.2. (actual),it is a 3. (tool)for protecting the country long ago.When you stand on it,you can 4. (imagine)how hard the workers worked.The Great Wall 5. (appear)like a dragon over the 6. (land).7. (feel free to)visit it anytime!Some stones 8. (weigh) over 1,000 kilos.I 9. (believe)you will be amazed.The wall 10. (connect)many watchtowers,and it is 11. (connect)with Chinese history. 12. (without)the Great Wall,China's history would be different.Many people feel 13. (disappoint)if they miss it.The 14. (connect) between the wall and Chinese culture is very deep.So come and see it! 参考答案 1.popular;2.tool;3.Actually;4.appear;5.land;6.feel free to;7.weighs; (一）单句填空 8.believe;9.connected;10.without;11.imagine;12.disappointed; 13.connection;14.connected;15.in 1.popular;2.Actually;3.tool;4.imagine;5.appears;6.land;7.Feel free (二)短文填空 to;8.weigh;9.believe;10.connects;11.connected;12.Without; 13.disappointed;14.connection 教材同步语法全解全练 重点2 单元语法 形容词最高级(-est/most形式) 项目 内容 定义 用于三者或三者以上的人或事物之间进行比 较，表示"最”。 构成规则 1.单音节词及部分双音节词：词尾加-est (如tall→tallest) 2.以不发音的e结尾：加-st(如nice→ nicest) 3.以"辅音字母+y”结尾：变y为i再加 -est(如happy一happiest) 4.重读闭音节结尾且末尾只有一个辅音字 母：双写该辅音字母再加-est(如big一→ biggest) 5.多音节词和部分双音节词：在词前加 most(如beautiful→most beautiful)) 1.主语+be+the+形容词最高级+ (in/of/among...) 例：She is the tallest girl in our class.. 常用结构 2.主语+动词+(the)+形容词最高级+ (名词)+范围 例：He runs(the)fastest of all.. 1.最高级前通常加the,但副词最高级前的 the可省略。 2.比较范围常用介词短语表示： ·in+集体/地点(in the world/inmy family） 注意事项 ·of/among+同类个体(of the three among them) 3.常见不规则变化： good/well→best bad/,badly→worst many/much→most little→least big→biggest,,hot→hottest,happy- 高频形容词示例 happiest,interesting most interesting, popular-most popular 考点通关 单元语法 语法专练一：单项选择(8题) 1.-Which city is in China? A.big B.bigger C.biggest 2.Tom is student in our class.He always gets the highest marks. A.a good B.better C.the best 3.This is movie I have ever seen. A.most interesting B.the most interesting C.more interesting 4.Of all the subjects,English is for me. A.easy B.easier C.the easiest 5.Mount Qomolangma is mountain in the world. A.high B.higher C.the highest 6.Lisa is girl in the group.She always helps others. A.friendly B.friendlier C.the friendliest 7.-Who runs in your school? A.fast B.faster C.(the)fastest 8.This is house in the neighborhood.It has five floors. A.tall B.taller C.the tallest 语法专练二：语法填空(10题) 用括号内所给词的正确形式填空，使句子完整、通顺。 1.This is book I have ever read. 2.Summer is season of the year in my city. 3.Who jumped in the sports meet? 4.She is one of teachers in our school. 5.The Nile is river in the world. 6.My sister is child in our family. 7.This computer is one in the store. 8.Among the three girls,Jenny is 9.Which animal is lion,tiger or snake? 10.He is person I know.He always smiles. 参考答案 语法专练一：单项选择 1.C;2.C;3.B;4.C;5.C;6.C;7.C;8.C 1.the best;2.the hottest;3.the farthest furthest;4. 语法专练二：语法填空 the most popular;5.the longest;6.the youngest;7.the most expensive;8.the tallest;9.the most dangerous; 10.the happiest 教材同步文章句型精讲 重点3 文章句型 1.We need each other to live. 结构：need sb..to do sth.需要某人做某事 中文：我们需要彼此才能生存。 2.Bees are one of the best examples of this connection. 结构：one of+可数名词复数.之一 中文：蜜蜂是这种联系的最好例子之一。 3.Their greatest work is pollination. 结构：主语+s+名词 中文：它们最伟大的工作是授粉。 4.On one trip,they often visit 50 to 100 flowers. 结构：主语+visit+数字+名词 中文：在一次行程中，它们经常拜访50到100朵花。 5.As they fly from one flower to another,they take pollen with them. 结构：as+时间状语从句，主句 中文：当它们从一朵花飞到另一朵花时，会带走花粉。 6.This action helps plants grow. 结构：help sb./sth.(to)do sth.帮助某人/某物做某事 中文：这个动作帮助植物生长。 7.Without their work,about 80 per cent of the plants in the world cannot grow. 结构：Nithout+名词，主语+cannot+动词原形 中文：没有它们的工作，世界上大约80%的植物无法生长。 8.Many scientists believe that bees are the most important animals on this planet. 结构：believe that+宾语从句 中文：许多科学家认为蜜蜂是这个星球上最重要的动物。 9.They work hard together to make their homes. 结构：work hard to do sth.努力做某事 中文：它们一起努力建造它们的家。 10.In order to store honey,they create honeycombs. 结构：in order to+动词原形为了.… 中文：为了储存蜂蜜，它们建造蜂巢。 11.Another interesting thing about bees is how they communicate. 结构：Another+名词+is+从句 中文：关于蜜蜂的另一件有趣的事是它们如何交流。 12.When a bee finds new food,it uses a dance to tell the others where and how far away the food is. 结构：When+时间状语从句，主句 中文：当一只蜜蜂发现新食物时，它会用舞蹈告诉其他蜜蜂食物在哪里以及有多远。 13.The number of bees is dropping,and scientists are worried. 结构：The number of+可数名词复数+is+形容词 中文：蜜蜂的数量正在下降，科学家们很担心。 14.Think about what you can do to protect one of the most amazing animals on earth. 结构：think about+疑问词从句 中文：想一想你能做些什么来保护地球上最神奇的动物之一。 考点通关 文章句型 练习一：单项选择 1.We need each other live. A.to B.for C.with D,of 2.Bees are one of the best of this connection. A.example B.examples C.exemplify D.exampling 3.Their greatest work is A.pollinate B.pollination C.pollinating D.pollinated 4.On one trip,they often 50 to 100 flowers. A.visits B.visited C.visit D.visiting 5.As they fly one flower another,they take pollen. A.from;to B.to;from C.from;from D.to;to 6.This action helps plants A.grow B.grows C.growing D.grew 7.Without their work,about 80 per cent of the plants grow. A.can B.cannot C.must D.may 8.Many scientists believe bees are the most important animals. A.what B.that C.which D.who 9.They work hard together their homes. A.make B.making C.to make D.made 10.In order to store honey,they honeycombs. A.create B.creates C.creating D.created 练习二：完成狗子（根据中文提示， 每空一词) 1我们需要彼此才能生存。 We each other live. 2.蜜蜂是这种联系的最好例子之一。 Bees are one of the best of this 3.它们最伟大的工作是授粉。 Their work is 4.在一次行程中，它们拜访50到100朵花。 On one they 50 to 100 flowers. 5.这个动作帮植物生长。 This helps grow. 6.没有它们的工作，世界上大约80%的植物无法生长。 their work,about 80 of the plants cannot grow. 7许多科学家认为蜜蜂是这个星球上最重要的动物。 Many scientists that bees are the most animals on this planet. 8.它们一起努力建造它们的家。 They work hard together their homes. 9为了储存蜂蜜，它们建造蜂巢。 In order to honey,they honeycombs. 10.蜜蜂的数量正在下降。 The of bees is 练习三：翻译句子（将下列佝子译成英语） 1我们需要彼此才能生存。 2.蜜蜂是这种联系的最好例子之一。 3.它们最伟大的工作是授粉。 4.当它们从一朵花飞到另一朵花时，会带走花粉。 5.这个动作帮植物生长。 6.没有它们的工作，世界上大约80%的植物无法生长。 7许多科学家认为蜜蜂是这个星球上最重要的动物。 8为了储存蜂蜜，它们建造蜂巢。 9当一只蜜蜂发现新食物时，它会用舞蹈告诉其他蜜蜂。 10想一想你能做些什么来保护蜜蜂。 练习一：单项选择 1.A 2.B 3.B 4.c 5.A 6.A 7.B 8.B 9.c 10.A 1.need;to 2.examples;connection 3.greatest;pollination 4trip;visit 5.action;plants 练习二：完成句子 6.Without;per cent 7.believe;important 8.to;make 9.store;create 10.number;dropping 1.We need each other to live. 2.Bees are one of the best examples of this connection. 3.Their greatest work is pollination. 4.As they fly from one flower to another,they take pollen with them. 5.This action helps plants grow. 练习三：翻译句子 6.Without their work,about 80 per cent of the plants in the world cannot grow. 7.Many scientists believe that bees are the most important animals on this planet. 8.In order to store honey,they create honeycombs. 9.When a bee finds new food,it uses a dance to tell the others. 10.Think about what you can do to protect bees. A 教材同步单元练习 一、阅读理解 A篇 Bees are amazing insects.They live in large groups called colonies().Each colony has one queen bee,many worker bees,and some drones().The queen's job is to lay eggs.Worker bees do all the other work:they clean the hive,feed the young,and collect food.Drones only mate with the queen. Worker bees are the busiest.They fly from flower to flower to collect nectar and pollen.On a single trip,a worker bee may visit 50 to 100 flowers.They use their long tongues to suck nectar.The nectar is stored in a special stomach and taken back to the hive.There,other worker bees turn it into honey.Honey is the bees'food for winter. Bees also do something very important for plants.When a bee lands on a flower, pollen sticks to its body.When it flies to another flower,some pollen falls off.This is called pollination ()Without bees,many plants cannot make fruits or seeds.In fact,about one-third of the food we eat depends on bees. Sadly,bees are in danger.Their number is dropping because of pesticides() habitat loss,and climate change.Scientists are worried.They say we must protect bees. What can you do?You can plant flowers in your garden.You can also avoid using harmful chemicals.Every small action helps! ()1.What is the main job of worker bees? A.To lay eggs. B.To mate with the queen. C.To do different kinds of work. D.To protect the hive. ()2.What does the underlined word "it"in Paragraph 2 refer to? A.The flower.B.The nectar. C.The stomach. D.The honey. ()3.According to the passage,pollination is important because A.it helps bees make honey B.it helps plants produce fruits and seeds C.it makes flowers beautiful D.it helps bees find food ()4.Which of the following is NOT a reason for the drop of bee numbers? A.Pesticides. B.Habitat loss. C.Climate change. D.Too many flowers. ()5.What is the best title for this passage? A.How Bees Make Honey B.The Life of Bees and Their Importance C.Why Bees Are Dangerous D.How to Keep Bees as Pets B篇 Plants are amazing living things.They can grow in many different places,from hot deserts to cold mountains.Some plants are very small,like moss )Others are very tall,like redwood trees.But all plants need sunlight,water,air,and soil to survive. Some plants have special ways to get food.For example,the Venus flytrap ( grows in poor soil.It gets extra food by catching insects.When an insect touches the tiny hairs inside the trap,the leaves close quickly.The plant then digests the insect.This sounds scary,but the Venus flytrap only catches small insects,not people! Other plants have amazing ways to protect themselves.Cacti()live in dry deserts.They have thick stems to store water.Their leaves are changed into spines ( to stop animals from eating them.Some plants can even "talk"to each other.When a plant is attacked by insects,,it gives off a chemical(化学物质).Nearby plants"smel" this chemical and start making their own protection. Plants are also important for the environment.They take in carbon dioxide(二氧化a碳) and give out oxygen().This helps clean the air.They also provide food and shelter for animals.Without plants,life on Earth would not be possible. ()1.What does the Venus flytrap do to get extra food? A.It catches insects with its leaves. B.It uses its spines to catch insects. C.It grows in rich soil. D.It drinks water from insects. ()2.How do cacti protect themselves from animals? A.By storing water in stems. B.By giving off a chemical. C.By having sharp spines. D.By growing very tall. ()3.What does the underlined phrase "give off"in Paragraph 3 mean? A.吸收 B.发出 C.阻止 D改变 ()4.What is the main idea of Paragraph 4? A.Plants can talk to each other. B.Plants are important to the environment. C.Plants provide food for animals. D.Plants need carbon dioxide. ()5.Which of the following is TRUE according to the passage? A.All plants need the same amount of water. B.The Venus flytrap can catch small animals like mice. C.Plants can communicate with each other in some ways. D.Cacti do not need any water to survive. 二、完形填空 Bees are wonderful creatures.They work hard every day to make our world a better place.But have you ever wondered how bees 1.with each other?They use a special "dance language". When a worker bee finds a good source of food,it flies back to the hive and does a dance.The dance tells other bees 2.the food is and how far away it is.If the food is close,the bee does a round dance.If the food is far,it does a waggle dance( 摆舞).The bee moves in a figure-eight pattern(8字形and waggles its body.The direction of the waggle tells other bees which way to go. This is not the only 3. thing about bees.They also have a great sense of smell. They can 4. flowers from far away.And they can remember the location of good flowers for a long time. Bees are also very 5..They work as a team.Each bee has its own job.Some bees are nurses.They take care of the baby bees.Some bees are guards.They protect the hive 6. enemies.Some bees are cleaners.They keep the hive clean. But bees are in trouble.The number of bees is 7. quickly.Scientists are trying to find out why.One reason is the use of pesticides.These chemicals kill insects,8. they also kill bees.Another reason is that bees are losing their homes.People cut down trees and 9.flowers.This makes it hard for bees to find food. We need to help bees.We can plant more flowers in our gardens.We can stop using harmful chemicals.Every small action 10. Remember:without bees,our world would be very different. A.talk B.communicate C.play D.fight A.what B.when C.where D.why A.boring B.strange C.dangerous D.amazing A.smell B.see C.hear D.taste A.lazy B.selfish C.organized D.noisy A.for B.from C.with D.against A.rising B.dropping C.growing D.flying A.so B.but C.or D.and A.plant B.water C.destroy D.protect A.matters B.works C.changes D.happens 三、阅读短文回答问题 Do you know that some plants can "eat"animals?Yes,there are about 600 species (of meat-eating plants in the world.They usually grow in places where the soil is poor.They get extra food by catching insects and other small animals One of the most famous meat-eating plants is the Venus flytrap.It grows in the USA. Its leaves are like two open jaws().On each leaf there are three tiny hairs.When an insect touches the hairs,the leaves snap shut突然合上)very quickly.The plant then slowly digests the insect. Another interesting plant is the pitcher plant ()It lives in Asia,Australia,and the Americas.Its leaves are shaped like a cup.The cup is filled with a special liquid () Insects are attracted by the plant's sweet smell.When they land on the edge of the cup,they slip and fall into the liquid.The plant digests them. Meat-eating plants are amazing,but they are not dangerous to humans.They only catch small creatures like flies,ants,and spiders.Even the largest meat-eating plant can only digest a small mouse. So,the next time you see a fly,remember:there might be a plant that would love to have it for lunch! 1.Why do some plants eat animals? 2.How does a Venus flytrap catch an insect? 3.Where does the pitcher plant live? 4.Are meat-eating plants dangerous to humans? 5.What is the best title for this passage?(Please write it in English.) 四、短文填空 用方框中所给单词的适当形式填空，使短文完整正确。（每个单词限用一次，每空限填一个单 词。) be,flower,make,important,for,they,because,plant,also,large Bees are small insects,but they are very 1. to our planet.Why?Because they help 2. grow.When bees fly from 3.to flower,they carry pollen ( on 4. bodies.This helps plants make fruits and seeds.In fact,about one third of the food we eat 5.possible because of bees. Bees 6. make honey.They collect nectar from flowers and turn it into honey.Honey is a delicious food 7.humans.People use it in many ways. But bees are in danger.The 8. number of bees is getting smaller.Scientists say this is 9.of pesticides (and loss of habitat.We need to do something to protect bees.Planting flowers is a good way.It gives bees more food.We should 10. stop using harmful chemicals. 1. 2. 3. 4. 5. 6 7. 8. 9. 10. 五、写作 话题：Why Bees Are Important to Us 提示： 1.蜜蜂在自然界中的作用是什么？（传粉、帮助植物生长） 2.蜜蜂对人类食物有哪些影响？（提供蜂蜜，帮助水果和蔬菜生长） 3.我们应该如何保护蜜蜂？（多种花、少用杀虫剂等） 要求：80词左右，语句通顺，语法正确。 参考答案 一、 阅读理 A篇：1.C2.B3.B4.D5.B 解 B篇：1.A2.C3.B4.B5.C 二、完形填 空 1.B;2.C;3.D;4.A;5.C;6.B;7.B;8.B;9.C;10.A 1.poor 2.snap shut quickly close) 三、阅读短 3.the Americas 文回答问题 4.No,they are not.No.) 5.Amazing Meat-eating Plants(或其他合理标题，如"Plants That Eat Animals'”) 四、短文填 1.important 2.plants 3.flower 4.their 5.is 6.also 7.for 8.large 9.because 空 10.also 五、写作 范文： Why Bees Are Important to Us Bees are very important to us.They help plants grow by carrying pollen from one flower to another.This is called pollination.Without bees,many plants would not produce fruits or seeds.About one-third of the food we eat comes from plants pollinated by bees. Bees also make honey,which is a healthy and delicious food.We use honey in many ways-on bread,in tea,and in cooking. However,bees are in danger because of pesticides and habitat loss.We can help them by planting flowers in our gardens and not using harmful chemicals.Let's work together to protect these amazing insects!(90 words)