Unit 4 Reduce, Reuse, Recycle Section A Grammar Focus课件2026-2027学年人教版九年级英语下册

该初中英语课件聚焦状语从句与宾语从句，通过热身环节提问句子中的从句类型导入，以表格分类讲解从句类型及连接词，结合即时训练与合并句子练习，搭建从识别到运用的学习支架，助力学生掌握语法知识。 其亮点在于将环保主题融入语法教学，通过“介绍污染类型”任务引导学生用连接词表达观点，既提升语言能力又培养环保意识。练习设计分层且实例丰富，总结清晰涵盖语法与词汇，学生能在实践中深化思维品质，教师可直接依托资料高效开展教学。

Unit 4 Reduce, Reuse, Recycle Section A What causes pollution? （Grammar Focus） 目 录 Warming Up 2 Grammar 3 Exercises 4 Learning Objectives 1 Summary 5 At the end of the class, we are able to: 1. identify adverbial clauses and object clauses in sentences and tell them apart by their functions. 2. choose the correct connecting words (how, why, whether, unless, as soon as, if, that, while, so…that) to complete sentences and passages according to the context. 3. use connecting words to introduce a kind of pollution and express our own ideas about environmental problems. Learning Objectives Warming Up I wrote about air pollution because I’m really worried about it. Do you know why air pollution is getting worse nowadays? What clauses are contained in these two sentences? Adverbial Clause Object Clause Grammar Presentation 4a Read the sentences. Label the underlined sentence parts. Write A for adverbial clauses or O for object clauses. I wrote about air pollution because I’m really worried about it. ( ) Do you know why air pollution is getting worse nowadays? ( ) We organize the rubbish into different groups as soon as it arrives. ( ) I never realized that there are so many kinds of rubbish! ( ) While recycling is good, not everything can be recycled. ( ) A O A O A 状语从句 在复合句中，用作状语的从句叫做状语从句。状语从句根据它表达的意思可分为时间、原因、条件、让步等类型。 1. 时间状语从句 从属连词(组) 含义及用法 示例 when 当……的时候; 主从句动作同时或先后发生 When my mother came in, I stopped eating. while 正当……时； ①主从句动作同时发生； ②从句谓语动词用延续性动词 While my sister was reading the newspaper, I was watching TV. as 当……的时候; 主从句动作同时发生 We always sing as we walk. 从属连词(组) 含义及用法 示例 before 在……之前; 主句动作在从句动作之前 You can’t watch TV before you finish your homework. after 在……之后; 主句动作在从句动作之后 Lisa went to bed after she finished her homework. until/till 到……时；直到……为止 My mother didn’t sleep until/till I returned. 从属连词(组) 含义及用法 示例 since 自……以来; 主句一般用现在完成时，从句用一般过去时 Mr. Green has taught in that school since he came to China three years ago. as soon as 一……就; 从句常用一般现在时表将来 Be sure to let Tom know the news as soon as he arrives. 2. 条件状语从句 从属连词(组) 含义及用法 示例 if 如果; 在某种条件下某事很可能发生 Study hard, if you want to pass the exam. unless 除非；如果不; 相当于“if…not”, unless 语气较强 You will fail unless you work harder. as long as 只要；既然 I will be ready to help you as long as you need me. 3. 让步状语从句 从属连词(组) 含义及用法 示例 though/ although 虽然；尽管；即使； 主句中不可再用but Though they are twin brothers, they don’t look like each other. even if/ even though 即使；虽然； 表示语气更强的让步 Even though my brother is young, he can take good care of himself. 4. 目的状语从句 从属连词(组) 含义及用法 示例 so that 以便; 通常置于主句后，that可省略 John stood up so that he could see the blackboard clearly. in order that 为了……; 可置于主句前或主句后 Lily got up early in order that she could get to school on time. 5. 结果状语从句 从属连词(组) 含义及用法 示例 so...that 如此……以至于; 中心词为形容词或副词 It was so hot that we wanted to go swimming. such...that 如此……以至于; 中心词为名词 There are such a lot of people on the beach that we have no place to enjoy our holiday. so that 以至于，所以; 常用在口语中，that可以省略 She spoke slowly so that everyone understood her. 请从方框中选择合适的词填空，注意每个词只能用一次。 Instant Training. although until so that unless as soon as You will miss the bus _________ you hurry up. She didn’t stop running _________ she reached the finish line. _________ he was tired, he kept on working. Please turn on the light _________we can see clearly. I will call you __________ I get home. unless until Although so that as soon as 宾语从句 在复合句中，由一个句子充当宾语，位于及物动词、介词或复合谓语之后，这个句子叫做宾语从句。 连接词 在从句中的功能 示例 连接词 that（无实义） 不作成分， 可省略 We hope (that) our friendship will last forever. whether（是否） 不作成分， 不可省略 I’m writing to ask whether /if you’d like to be my friend. if（是否） 注意：that不可省略的情况 ①当从句主语是this、that或被this、that修饰时； ②当主句谓语动词与宾语从句之间有插入语时； ③当宾语从句中含有其他从句时； ④当句中的动词后接多于两个由that引导的宾语从句时，除第一个that可省略外，其余从句中的that均不可省略； ⑤it作形式宾语代替that引导的宾语从句时。 注意：只能用whether不能用if的情况 ①当与or not直接连用时； ②当宾语从句置于句首时； ③介词后的宾语从句。 连接词 在从句中的功能 示例 连接 代词 who (谁, 主格) 作主语、宾语或表语, 不可省略 Can you tell me who will play basketball with us? (作主语) whom (谁, 宾格) 作宾语, 不可省略 The girl whom the teacher is talking to is my younger sister. (作宾语) whose (谁的，所有格) 作定语, 不可省略 I often talk with the people whose mother language is English.(作定语) 连接词 在从句中的功能 示例 连接 代词 what (什么) 作主语、宾语或表语, 不可省略 We never know what will happen in the future! (作主语) which (哪一个) 作主语、宾语或定语, 不可省略 We are discussing which way we should go. (作定语) 连接词 在从句中 的功能 示例 连接 副词 when(何时) 作状语， 不可省略 Can you tell us when the band starts playing this evening? (作时间状语) where(哪里) After ten years, I still remember where we first met. (作地点状语定语) 连接词 在从句中 的功能 示例 连接 副词 how(如何) 作状语， 不可省略 My mother always taught me how to draw when I was young. (作方式状语) why(为什么) Think about things you can do in spring and why you do them. (作原因状语) 将两句合并为一句，每空一词： 1.Where is the nearest post office? Could you tell me? → Could you tell me ________ the nearest post office ________? 2.Does he like pop music? I wonder. → I wonder ____________ he ________ pop music. 3.The earth moves around the sun. The teacher told us. → The teacher told us ________ the earth _________ around the sun. 4.When will the train arrive? Can you tell me? → Can you tell me _________ the train _________ _________? where if / whether that Instant Training. is likes moves when will arrive 4b Complete the sentences with the connecting words in the box. Practice how  why  whether  unless  as soon as 1. I don’t know ________ we should throw away or reuse this plastic bottle. 2. We cannot deal with the environmental problem _________ everyone works together. 3. I wonder _______ harmful chemicals from waste get into human bodies. 4. ___________ the smog disappeared, she coughed less and slept better. 5. Can you tell me _______ air pollution and land pollution are harmful? whether unless how As soon as why adj. /inˌvaɪrənˈmentl/ ______ land, water, and air pollution are well-known problems, light pollution is a problem that most people are not aware of. Light pollution is caused by street and building lights. Most people do not realize ______ it can harm their health, causing eye problems or disturbing their sleep. Sometimes, the light on a road is ______ bright ______ it causes traffic accidents. Light pollution harms animals as well. Some insects get trapped and die in street lamps ______ they are attracted to the light. 4c Complete the passage with the connecting words in the box. if  that  while  so … that While that so that if adj. /ˌwelˈnəʊn/ v. /diˈstɜːb/ v.&n./ˈtræp/ n. /læmp/ Noise pollution is caused by busy streets or machines. It can bother people so that they suffer from hearing or memory loss, … 4d Introduce a kind of pollution. Use connecting words to link your sentences. Production v. /ˈbɒðə(r)/ n. /lɒs/ Noise pollution is caused by busy streets or machines. It can bother people so that they suffer from hearing or memory loss. If people live in noisy areas for a long time, they will feel tired and worried. While most people care about air pollution, they seldom realize the danger of noise pollution. What’s more, studies show that noise also influences students’ learning because loud noise makes it hard for them to pay attention in class. Unless we take action to reduce noise, the problem will become worse. Therefore, we should take action as soon as we can so that everyone can enjoy quiet environments. Example Exercises 一、根据汉语提示填空。 1. Many people are trying to solve the ______________ (自然环境的) problems in their cities. 2. Mo Yan is ____________ (众所周知的) as a great writer around the world. 3. Please don’t ___________ (打扰) your father while he is working in the study. environmental well-known disturb 4. The little mouse was ___________ (卡住) in the hole and couldn’t get out. 5. There is a new ___________ (台灯) on my desk. It gives me more light to read. 6. Don’t ___________ (花费时间精力) to wait for me. I can go home by myself. 7. The ___________ (丧失) of his old friend made him very sad. trapped bother loss lamp 二、用合适的引导词填空 1. The monitor doesn’t know _________ forgot to turn off the lights last night. 2. ___________ he was very tired, he still helped his little sister with her homework. 3. Please speak louder __________ everyone can hear you clearly. 4. I will tell him the news ________________ I see him. who Although so that when/as soon as 5. The box is _______ heavy _______ I can’t carry it. 6. Could you tell me _________ the nearest hospital is? 7. I don’t know ______________ she likes apples. 8. You won’t pass the exam ________ you study hard. 9. She waited at the station ______ her father came back. 10. Nobody knows ______ he left without saying a word. where if / whether unless until why so that 1. Grammar： 状语从句和宾语从句 2. Words and expressions: environmental, well-known, disturb, trap, lamp, bother, loss Summary $