Unit 5 Nature’s Temper Section A Grammar Focus课件 2025-2026学年人教版八年级英语下册

该初中英语课件聚焦过去进行时及when/while引导的时间状语从句，通过“Let's watch and learn”视频情境导入，结合风暴来临时学生上课、母亲做饭等动作实例，从定义、核心公式到标志词（如at 8 yesterday）逐步过渡，对比一般过去时，构建“情境感知-语法解析-应用练习”的学习支架。 其亮点在于融合语言能力与文化意识，通过台风应对措施等语篇渗透“灾难无情人有情”内涵，借助延续性与非延续性动词对比、句子合并练习（如“I was doing homework when the typhoon landed”）培养思维品质。采用情境教学与分层练习，学生能提升语法应用能力和安全意识，教师可依托系统支架高效开展教学。

Unit 5 Nature’s Temper Section A What happens during a natural disaster? Grammar Focus 能够结合例句识别when和while引导的时间状语从句，理解其表意功能；能够理解过去进行时的表意功能，分析句子结构特征，并通过与一般过去时的对比，加深对过去进行时的理解。（学习理解） 01 能够了解龙卷风的相关知识以及应对措施，同时体会语篇中蕴含的“灾难无情人有情”的内涵。（迁移创新） 03 能够正确使用过去进行时及从属连词when和while连句、造句、补全语篇，并基于语法板块语篇的内容，准确描述过去某一时刻正在发生的动作。（应用实践） 02 教学目标 救援队正在搜救。 Rescue teams were searching for survivors. Let’s watch and learn. 思考问题：这些句子都描述了什么类型的时间？动作有什么特点？ When the storm came Students were having lessons. Mother was cooking in the kitchen. Father was driving home. Rescue teams were searching for survivors. 过去进行时表示在过去某一特定时间点或某一段时间内正在进行或持续发生的动作。 核心公式：was/were + 动词-ing形式 否定句：was/were + not + 动词-ing形式 疑问句：Was/Were + 主语 + 动词-ing形式 过去某一具体时刻正在进行的动作 标志词：at 8 yesterday, at that moment, at this time last week 实例： At 9 p.m. last night, I was watching a movie. （昨晚9点，我正在看电影。） What were you doing at this time yesterday? （昨天这个时候你在做什么？） 练习：根据时间描述动作 When the rain started (昨天下雨时), I ____________ (walk) home. At 9 last night (昨晚9点), my family ____________ (watch) a movie. was walking was watching Let’s look and say! It is 6 o'clock now. Paul is at home. He is watching TV. At 4 o'clock he wasn't at home. He was at the sports club. He was swimming in the pool. He wasn't watching TV. 过去某一段时间内持续进行的动作 标志词：from 7 to 9, all morning, the whole afternoon 实例： She was practicing the piano from 2 to 4 yesterday. （昨天2点到4点，她一直在练钢琴。） They were cleaning the house all morning. （他们整个上午都在打扫房子。） 练习：根据时间描述动作 1.During the snowstorm, people （stay）indoors. 2.While the flood waters were rising, volunteers （help）the elderly. were staying were helping Let’s look and say! Jack was reading when his phone rang. Learn the time adverbial clauses guided by "when" and "while" 以when和while引导的时间状语从句 1)延续性动词和非延续性动词 延续性动词指动作可以延续一段时间，而不是瞬间结束。 如：work、study、drink、eat等。 非延续性动词指动作极为短暂，瞬间结束。 如：start、begin、hit、jump、knock等。 ：作为背景的长动作（+ when短动作） 结构：长动作（进行时） + when + 短动作（一般过去时） 实例： I was walking in the park when I saw an old friend. （我正在公园散步时，看到了一位老朋友。） They were having dinner when the phone rang. （他们正在吃晚饭时，电话响了。） 练习：根据时间描述动作 I （read）a book when the phone rang. was reading Learn the usage of the reflexive pronouns. 用法 ①when表示“当……的时候”。从句中既可用延续性动词，又可用非延续性动词，这些动词既可以表示动作，又可表示状态。从句中动作既可和主句的动作同时发生，又可在主句的动作之前或之后发生。如： Mary was having dinner when I saw her. The boy was still sleeping when his mother got home yesterday morning. ②while表示“在……的时候”、“在……期间”。它强调主句的动作与从句的动作同时发生或主句的动作发生在从句的动作过程中。while从句中必须是表示动作或状态的延续性动词。如： The weather was fine while we were in Beijing. She called while I was out. While the boys were playing football, it rained. ③如果主句的动作在从句的动作过程中发生，从句常用进行时。如: 1. Why should we avoid falling down when we go downstairs? ________________________________________________ ________________________________________________ 2. What should we do to keep safe if we can’t escape from the building in time? ________________________________________________________________________________________________ Because accidents may happen when many people rush into a crowded stair./Because it may be very dangerous. We should hide ourselves under a table and stay away from windows. Learn the usage of the reflexive pronouns. 主句 从句 长 短 短 长 长 长 when when/while while when/while + 长: 短: was/were+ V-ing (过去进行时态) 动词过去式 (一般过去时态) Value lives. Some people care about the things that are valuable. You will lose the best opportunity to run away. Anything is less valuable than your lives. Keep calm. When you are caught in a building, you should keep calm. Don’t shout all the time. You should save your energy and try to find some food and water. 1. What is the most valuable thing to us according to the passage? ________________________________________________ 2. What can we learn from the passage? ________________________________________________________________________________________________ Our lives. We should remember some advice on how to keep safe when an earthquake happens. 1. I did my homework. The typhoon landed on the coast. 2. The power went out. My father and I made dinner. 3. Kate wrote a letter. Her brother called to warn her of the storm. Combine each pair of sentences using when or while. I was doing my homework when the typhoon landed on the coast. The power went out while my father and I were making dinner. Kate was writing a letter when her brother called to warn her of the storm. go out(火或灯光)熄灭 warn sb. of... 警告某人…  4. My parents packed the supplies. I moved our things off the floor. 5. I slept soundly. It rained cats and dogs. While my parents were packing the supplies, I was moving our things off the floor. When I slept soundly, it was raining cats and dogs.  rain cats and dogs 下倾盆大雨 The river got its name Huanghe in Chinese 29. ________ its water is yellow, as it took lots of yellow sand to the water when it ran through the Loess Plateau(黄土高原). The river starts from Qinghai Province in northwestern China. It runs through a lot of places before 30. ________ (run) into the Bohai Sea. because running 1.He was watch TV when the doorbell rang. ( ) 2.Were you play football at 4 yesterday afternoon? ( ) 3.While we were walking, we see a beautiful bird. ( ) 4.When the rain started, we were having a picnic. ( ) 5.They were not go to school while it was snowing. ( ) 6.What were you doing at this time last week? ( ) × × × √ × √ He was watching TV when the doorbell rang. Were you playing football at 4 yesterday afternoon? While we were walking, we saw a beautiful bird. They were not going to school while it was snowing. 判断句子正误，对的打√，错的打×并改正 Press here to exercise more. Words： relative truck supply preparation Phrases：get into an accident next time emergency supplies make preparations Useful expressions 20 20 Lavf58.29.100 Packed by Bilibili XCoder v2.0.2 $