Unit 5 Nature's temper Section A 4a-4d过去进行时课件 2025-2026学年人教版八年级英语下册

Unit 5 Nature’s Temper Section A 4a--4c Learning goals 1. 观察并归纳过去进行时的结构（was/were + doing）及其基本用法，理解其表示过去某一时刻或时间段正在进行的动作。 2. 理解并区分 when 和 while 在引导时间状语从句时的不同用法（when 后接短暂性动作或同时性动作，while 后接持续性动作）。 3. 能正确运用过去进行时描述过去某个时刻正在发生的事情。能用 when 和 while 连接两个同时发生的动作，并能根据语境选择合适的连词。 4. 能完成课本 4a–4c 的语法练习，并在情境中准确使用目标语法。 一、核心语法：过去进行时 1. 基本概念 过去进行时，用来描述过去某一个具体的时间点/时间段内，正在持续进行的动作。 - 结构： 肯定句： 主语+was/were + 动词-ing  - 主语是I/he/she/单数名词 → 用  was  - 主语是you/we/they/复数名词 → 用  were  课本例句拆解： -  What were you doing while it was snowing heavily?  （大雪纷飞的时候，你正在做什么？） 这里的 were doing 和 was snowing ，都是过去进行时，描述两个同时持续的动作 Free talk Ask and answer doing her homework What was she doing at the time of the rainstorm? She was___________________at home. What was he doing at the time of the rainstorm? He was________at the library after school. reading What was he doing at the time of the rainstorm? He was____________from the supermarket. walking home She was_________________after work. waiting for the bus What was she doing at the time of the rainstorm? 场景1：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，at the time当时， at the time of..在...的时候 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) TV. was walking was watching 场景2：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. were staying 一、基础题（过去进行时填空） 用  was  或  were  填空，补全句子。 1. I ______ washing my clothes at 7:00 yesterday evening. 2. They ______ playing basketball when the rain began. 3. She ______ not reading a book when I called her. 4. What ______ your parents doing at that time? 5. The children ______ drawing pictures while the teacher was talking. Read the sentences. Pay attention to when ,while and the verbs. What were you doing while it was snowing heavily? I was travelling on the train then. What were your family doing when the typhoon hit? My children and I were reading together. When my neighbour called, my family were having dinner. We were driving home when the strong winds started. While we were driving home, the strong winds started. It was raining hard while we were driving back. 一、用when 还是while,一句话口诀: -- when跟 短动作（瞬间发生）， while跟长动作（同时进行）， 一长一短用when , 两长动作用while 。 - when跟 短动作（瞬间发生） （一般过去时）(理解：一个正在进行的持续的动作，被一个短暂的动作打断了。) 连词when/while 辨析 连词when/while 辨析 时态 选择 长动作用while（v. 过去进行时），一个短动作用when（v.一般过去时） 如：（hit, call, start） 如：snow, drive, wait,eat 1. 过去进行时 + when + 一般过去时 （最常考） 核心逻辑：一个持续的长动作（过去进行时），被一个短暂的突发动作（一般过去时）打断。 -  We were driving home when the strong winds started.  -  They were reading in the library when the rainstorm came.  -  When my neighbour called, my family were having dinner.  2. while + 过去进行时，主句一般过去时」 核心逻辑：在一个持续动作进行的过程中，发生了另一个动作。  While we were driving home, the strong winds started.  -  While you were sleeping, I called Jenny and she helped me.  3. while + 过去进行时，主句也用过去进行时 核心逻辑：两个动作在过去同时持续发生。 -  While Linda was sleeping, Jenny was helping Mary with her homework.  -  It was raining hard while we were driving back.  二、易错题（when/while 辨析） 选择正确的连词填空。 1. ______ I was walking in the park, I saw a cat. 2. He was listening to music ______ his mother came in. 3. ______ the storm started, we were eating dinner. 4. My sister was doing her homework ______ my brother was playing games. 5. ______ she was cooking, the phone rang. Practce 1. I did my homework. The typhoon landed on the coast. 步骤分析： - 长动作： did my homework （做作业，可持续） - 短动作： landed （台风登陆，瞬间发生） - 逻辑：长动作进行时，被短动作打断，用  when ，主句改过去进行时。 ✅ 合并答案：  I was doing my homework when the typhoon landed on the coast.  2. The power went out. My father and I made dinner. 步骤分析： - 长动作： made dinner （做饭，可持续） - 短动作： went out （停电，瞬间发生） - 逻辑：做饭时突然停电，用  when ，主句改过去进行时。 ✅ 合并答案：  My father and I were making dinner when the power went out. 3. Kate wrote a letter. Her brother called to warn her of the storm. 步骤分析： - 长动作： wrote a letter （写信，可持续） - 短动作： called （打电话，瞬间发生） - 逻辑：写信时被电话打断，用  when ，主句改过去进行时。 ✅ 合并答案：  Kate was writing a letter when her brother called to warn her of the storm.  4. My parents packed the supplies. I moved our things off the floor. 步骤分析： - 两个都是长动作： packed the supplies （打包物资）和  moved our things （搬东西）， 都是可持续的动作，强调“同时进行”。 - 逻辑：两个动作同时发生，用  while ，两个句子都改成过去进行时。 ✅ 合并答案：  While my parents were packing the supplies , I was moving our things off the floor.  （也可以反过来写： I was moving our things off the floor while my parents were packing the supplies. ） 5. I slept soundly. It rained cats and dogs. 步骤分析： - 两个都是长动作： slept soundly （熟睡）和  rained cats and dogs （下大雨），都是可持续的动作，强调“同时进行”。 - 逻辑：两个动作同时发生，用  while ，两个句子都改成过去进行时。 ✅ 合并答案：  While I was sleeping soundly, it was raining cats and dogs.  （也可以反过来写： I was sleeping soundly while it was raining cats and dogs. ） was While were When were A: Excuse me, Miss. What were you doing when the tornado hit? B: My family and I were hiding in a safe room. A: That's good. What did you do while you were waiting there? B: Oh, while we were waiting, we tried to keep my little sister calm. A: How did you do that? B: My dad gave her some chocolate. He told her we were hiding from an angry lion. That worked well! A: What a kind father! What was it like after the storm? B: When we stepped outside, the sun was shining! A: What were people doing then? B: Everyone was asking each other if they were OK. Some were starting to clean the streets. A: Oh, great! The tornado was scary, but it also brought people closer together. B: That's right! 4d p45 Past Continuous Tense 过去进行时 结构 用法 when 与while was/were + v-ing 否定/疑问: was/were not, Was/Were...? 表示过去某个时刻正在进行的动作 表示过去某个时间段正在进行的动作 -- when跟 短动作（瞬间发生）， while跟长动作（同时进行）， 一长一短用when , 两长动作用while at 8:00 last night, at that time from 7 to 9 yesterday Summary 1.When Jenny_________( look) up, thick black clouds _____________ ( form) in the sky.（珍妮抬头看的时候，厚厚的乌云正在天空中聚集。） 2. While they______________ (wait), Jenny's little sister ___________(start) to cry. （他们等待的时候，珍妮的小妹妹开始哭了起来。 3. When they ___________(step) outside, they ________(find) the sun _________(shine). （他们走出去的时候，发现太阳正照耀着。） 4. People ___________(ask) one another if they were safe while some __________( start) to clear the streets.（人们互相询问是否安全，同时有些人正开始清理街道。） 作业：用所给词的适当形式填空 $