Unit 4 Section B 2a-2c 课件2026-2027学年人教版英语八年级上册

Unit 4 Amazing Plants and Animals Section B How are plants and animals connected with us? Vocabulary in Use 2a-2d 学习目标 通过本节课学习，学生能够： 识别并理解词汇的基本含义、词性及构词规律，掌握名词后缀的基本用法。（学习理解） 能够正确运用词汇的适当形式完成句子和语篇填空，理解词汇在语境中的具体含义。（应用实践） 能够在真实情境中创造性使用所学词汇表达个人情感、描述事物，并初步理解词汇在生态语境中的引申意义。（迁移创新） Warming Up 点击播放视频 Let’s watch a video about whales, and then talk about your findings with your classmates. 上21世纪教育网 下精品教学资源 Circle the odd ones. Then give your reasons. 1. habit height size weight 2. joy happiness fun enjoy 3. angry disappointed smart sad 4. appear look seem watch 5. honey milk juice bread 2a /ˈhæpinəs/ n. 幸福；快乐 /ˌdɪsəˈpɔɪnt/ v. 使失望；使破灭 谢谢观赏 21世纪教育网（www.21cnjy.com)中小学教育资源网站 有大把高质量资料？一线教师？一线教研员？ 欢迎加入21世纪教育网教师合作团队！！月薪过万不是梦！！ 详情请看： Circle the odd ones. Then give your reasons. 2a different Tips: You can pay attention to the words’ part-of-speech,semantic category,grammatical function,substance category.（注意单词的词性、词义范畴、语法功能和物质类别） habit height size weight joy happiness fun enjoy angry disappointed smart sad appear look seem watch honey milk juice bread habit height size weight joy happiness fun enjoy angry disappointed smart sad appear look seem watch honey milk juice bread physical aspects nouns negative adjectives （消极的） linking verbs (系动词) drinks Let’s check All the others are ... 1. habit height size weight 2. joy happiness fun enjoy “Height,” “size” and “weight” are all physical measurements(物理测量), but “habit” means behavior. “Joy”, “happiness” and “fun” are all nouns that describe positive emotions. “Enjoy” is a verb that means you like something. Now, let’s circle the odd ones. 上21世纪教育网 下精品教学资源 3. angry disappointed smart sad 4. appear look seem watch 5. honey milk juice bread “Angry”, “disappointed” and “sad” are used to describe people’s negative feelings. “Smart” is used to describe someone's intelligence(智力) or quick thinking. “Appear”, “look” and “seem” are linking verbs(描述状态), but “watch” is an action verb (观察). “Honey” “milk” and “juice” are liquids(液体), but “bread” is a solid(固体) food. 上21世纪教育网 下精品教学资源 We can change verbs/adjectives into nouns by adding suffix.es We can add suffixes to their endings [ˈsʌfɪks] 后缀 happy (adj.) + -ness → happiness (n.) perform (v.) → performance (n.) educate (v.) → education (n.) real (adj.) → reality move(v.)-movement (n.) decide(v.)-decision (n.) Presentation 英语中，我们经常可以通过在形容词或动词后添加一个后缀 (suffix) 来构成名词。这个名词通常表示一种状态、品质、行为或概念。 名词变身术—Add the endings to form nouns.  Add the endings -ance,-(t)ion,-ness, and-ity to form nouns. Use your dictionary. 2b 1. act ___________ 2. good ___________ 3. kind ___________ 4. appear ___________ 5. real ___________ 6. imagine ___________ 7. connect ___________ 8. popular ___________ 9. communicate ___________ 10. important ___________ 请将他们分类： -ance -(t)ion -ness -ity action goodness kindness appearance reality imagination connection popularity communication importance Can you find any rules? Share with your partner. verbs → nouns adjectives → nouns act good appear kind imagine real connect popular communicate important action appearance imagination connection communication goodness kindness reality popularity importance v.＋ -(t)ion / -ance adj.＋ - ness / - ity / - ance n. -ance 结尾（多表 “行为、状态” ） -(t) ion 结尾（多表 “动作、结果” ，动词变名词常用 ） -ness 结尾（形容词 + ness 变 “状态、性质” ，超规律 ） -ity 结尾（形容词 + ity 变 “性质、状态” ，稍正式但基础 ） Let’s think 后缀suffix -age -ee/-er/-or/-ist -ication/ -tion/-sion -dom -ance/-ence -al -ment -(i)ty -ness -ism -ery 加在v.后 加在adj.后 加在v./adj.后 1. -ance 规则：通常加在动词后面 ，构成抽象名词表示行为、状态、性质等 。 perform（v.表演；执行 ）→ performance（n.表演；表现 ） assist（v.帮助 ）→ assistance（n.帮助；援助 ） 2. -(t)ion 规则：一般加在动词后，构成名词表示动作、过程或结果。 educate（v.教育 ）→ education（n.教育 ） decide（v.决定 ）→decision（n.决定 ） admit（v.承认；准许进入 ）→admission（n.承认；准许进入 ） The rules for forming nouns with the suffixes -ance, -(t)ion, -ness, -ity: 3. -ness 规则：加在形容词后面 ，构成抽象名词用来表示形容词所描述的性质、状态。 happy（adj.幸福的；快乐的 ）→ happiness（n.幸福；快乐 ） kind（adj.善良的 ）→ kindness（n.善良 ） 4. -ity 规则：常加在形容词后（部分词需对词尾做适当变化 ，如去掉不发音 -e 等），构成名词，表达与原形容词相关的性质、状态或情况。 active（adj.积极的 ）→activity（n.活动；活跃 ） possible（adj.可能的 ） →possibility（n.可能性 ） You may not realize it, but frogs play an important role in our ________ ecosystem. The smallest frogs are about the size of a pea, while larger ones can grow as big as a human hand. Many people know that frogs help to _______ farms by eating insects. _________, not everyone understands their __________ in nature. Frogs can live on _____ and in water. Because of this, they are popular subjects in studies on climate change and the ecosystem. however important land planet protect adj. V原 adv. n. Let’s predict adj.+n. help to do 形代+n. What kind of words would be put in the blanks? adv. （放句首），+句子 and 表并列，结构要和 in water 一致 n. 1. I felt ____________ when my favourite flowers died. 2. After the rain, some mushrooms ________ in the garden. 3. In my hometown, people often use bamboo baskets to ______ food. 4. What did you put in your luggage? It _______ a ton. 5. I can’t ________ my life without my pets. They mean a lot to me. appear disappoint imagine store weigh disappointed appear store weighs imagine 形容词 动词原形 动词原形 动词原形 动词三单 Complete the sentences with the correct forms of the words in the box. 2c n. 蘑菇；伞菌 n. 吨 对……来说意义重大 use sth. to do 使用某物做某事 meant Complete the passage with the correct forms of the words in the box. however important land planet protect You may not realize it, but frogs play an important role in our _______ ecosystem. The smallest frogs are about the size of a pea, while larger ones can grow as big as a human hand. Many people know that frogs help to _______ farms by eating insects. __________, not everyone understands their ___________ in nature. Frogs can live on ______ and in water. Because of this, they are popular subjects in studies on climate change and the ecosystem. protect However importance land planet’s 2d play a role (in) 在……中发挥作用；扮演角色 但是 重要的 陆地 行星 保护 形容词 动词原形 副词 名词 名词 What can frogs do for nature? Frogs help to protect farms by eating insects. Frogs can help in studies on climate change and the ecosystem. Frogs play an important role in the planet's ecosystem. planet's protect However importance land Language points 在...中扮演重要的角色 星球的生态系统 ...的尺寸、大小 表对比 和...一样大; as +原级+ as 通过吃昆虫；by (prep.)+ V-ing 在陆地上 因为，后+n./n.词组 关于 气候变化 The smallest ones are as tiny as a pea, and some big ones can be as large as your hand! They can jump in the field. They live in water or on land. Guess what animal it is? pea /piː/ n. 豌豆 It’s a frog. Complete the mind map and retell. • protect farms by ___________ • popular subjects of ___________ and the _____________ _________ Frogs • _________________ • _____________________ _________ living places sizes eating insects climate change ecosystem the size of a pea as big as a human hand on land in water importance Let’s retell Language Points 句 讲 练 例 You may not realize it, but frogs play an important role in our planet ecosystem. play a role in... 在······中扮演角色；起作用 同义短语：play a part in..., 其中in是介词，后面跟名词、代词或动名词。 Everyone should play a part in protecting the environment. 每个人都应该参与保护环境。 We sincerely hope that WWF（世界自然基金会） can play a role in (protect) this endangered species. protecting Every species has its unique value in the ecosystem. We should protect nature and maintain biodiversity. 每一个物种在生态系统中都有独特价值，我们要保护自然、维护生物多样性。 Exercise Frogs are __________ to the ecosystem because they eat insects. __________ they are small, they play a big role in nature. We must __________ frogs and their habitats. Frogs can live both on __________ and in water. They are an important part of the __________ we live on. planet protection land although importance important Although protect land planet 一、单项选择 ( )1. I was very ______ when I heard the bad news. A. angry B. anger C. angrily D. angrier ( )2. The little boy can’t ______ how big the world is. A. imagine B. imagine about C. imagine with D. imagine to ( )3. The old man likes to ______ his old photos in the box. A. store B. save C. enjoy D. hold ( )4. The ______ of the elephant is about 5 tons. A. high B. height C. weigh D. weight A A A D Exercise 1. I’d like to buy some sausages, ___________ (mushroom), onions and cheese to make a pizza. 2. Volunteers bring _________ (happy) to the elderly in nursing homes. 3. She experienced ______________ when she didn’t get the job she had applied for. (disappoint) 4. The film Coco helps viewers understand the ___________ (important) of family and dream. 5. Let’s find out what else we can do __________ (protect) as many animals as possible. mushrooms happiness disappointment importance to protect 二、用所给单词的适当形式填空 Homework 基础作业： 整理名词后缀的知识点，并画成思维导图。 提升作业： 模仿2d的段落结构，写一个关于另一种动物（如蜜蜂、蝴蝶等）的短段落，使用至少3个本课学到的词汇。 拓展作业： 研究青蛙或其他两栖动物在生态系统中的重要性，用英文写一段80词左右的介绍，尽量使用本课学到的词汇。 $