Unit6 What disaster strikes 过去进行时 & whenwhile 辨析课件2026-2027学年外研版英语八年级上册

该初中英语课件聚焦过去进行时（定义、肯否疑问句式、动词-ing变形规则）及when/while用法辨析，通过“课间热身”题导入，从具体时间标志词填空过渡到语境应用，关联现在进行时旧知，搭建阶梯式学习支架。 其亮点在于用表格对比动词-ing规则、when/while时态搭配，结合“when接短动作，while接长动作”口诀梳理逻辑，聚焦过去进行时与一般过去时差异等易错点，通过单选、改错题型强化语言能力，培养对比分析的思维品质，助力学生系统掌握语法，教师可直接用于课堂提升教学效率。

Unit6 What disaster strikes 过去进行时 & when/while 用法辨析 单击此处编辑母版标题样式 单击此处编辑母版文本样式 第二级 第三级 第四级 第五级 单击此处编辑母版标题样式 单击此处编辑母版文本样式 第二级 第三级 第四级 第五级 单击此处编辑母版标题样式 单击此处编辑母版文本样式 第二级 第三级 第四级 第五级 单击此处编辑母版标题样式 单击此处编辑母版文本样式 第二级 第三级 第四级 第五级 单击此处编辑母版标题样式 单击此处编辑母版文本样式 第二级 第三级 第四级 第五级 单击此处编辑母版标题样式 单击此处编辑母版文本样式 第二级 第三级 第四级 第五级 单击此处编辑母版文本样式 第二级 第三级 第四级 第五级 学习目标 1.掌握过去进行时定义、肯 / 否 / 疑问三种句式结构，熟练动词 - ing 变形规则 2.精准区分 when（短暂动作）与 while（持续性动作）的使用场景 3.辨析过去进行时 vs 一般过去时核心差异，规避高频易错题型 4.能完成单选、改错、语法填空三类题型，熟练用于书面表达 过去进行时（was/were doing） 定义：表示过去某一具体时刻或某一段时间内正在进行的动作，常与具体时间点、时段或背景动作结合。 结构：was/were + 动词-ing形式 主语为单数（I/he/she/it）：用 was 主语为复数（we/you/they）：用 were 否定式：was/were + not + 动词-ing（wasn’t/weren’t doing） 疑问式：Was/Were + 主语 + 动词-ing? 【考点提示】:at + 具体过去时刻、at that time 固定搭配过去进行时 动词-ing变化规则（同现在进行时） 变化类型 规则 例词 一般情况 直接加-ing practise → practising, explain → explaining 以不发音e结尾 去e加-ing hope → hoping, face → facing 重读闭音节（元+辅结尾） 双写末尾辅音加-ing swim → swimming, push → pushing 以ie结尾 变ie为y加-ing lie → lying, die → dying 核心用法与例句 用法 标志词 例句 过去某具体时刻正在进行的动作 at 8:00 yesterday, at that time, when + 短暂动作 At 20:10 last night, Xiaoming was reading the story Sink or Swim. 过去某一段时间持续进行的动作 all morning, the whole day, while + 持续动作 He was practising maths problems all weekend to improve his grade. 过去的背景动作（为另一个动作提供场景） when/while Jiajia’s heart was beating fast when she stepped into the swimming pool. 课间热身 1.My brother ____________ (play) computer games at 7:30 last night. 答案：was playing 解析：at 7:30 last night 是过去具体时刻，用过去进行时；主语 my brother 单数，be 动词用 was，play 直接加 ing。 2.________ you ________ (do) your homework at that time yesterday? 答案：Were; doing 解析：at that time yesterday 为过去进行时标志；一般疑问句把 were 提前，主语 you搭配 were，do 变 doing。 课间热身 3.Look! At that moment last Sunday, they ____________ (plant) trees in the park. 答案：were planting 解析：at that moment last Sunday（上周日那个瞬间），动作当时正在发生；主语 they 复数，be 动词用 were。 4.I ____________ not ________ (watch) the movie at 9 p.m. yesterday. 答案：was; watching 解析：at 9 p.m. yesterday 过去时刻，否定结构 was/were not + doing；主语 I 搭配 was。 课间热身 5.Her mother ____________ (cook) dinner the whole evening yesterday. 答案：was cooking 解析：the whole evening（一整晚）是过去持续时段，用过去进行时，主语 her mother 单数用 was。 6.We ____________ (talk) about our childhood all morning last Saturday. 答案：were talking 解析：all morning 表示过去一整段持续时间，主语 we 复数，be 动词用 were。 when 与 while 的用法辨析（核心考点） 二者均引导时间状语从句，用于连接两个过去的动作，核心区别在于动作的持续性和时态搭配 连词 接的动作类型 常用时态搭配 例句 when 短动作（瞬间完成） 或 长动作（持续进行） 短动作：一般过去时 长动作：过去进行时 1. When the swimming team won first place, we were watching the match. 2. I was going to a competition when I stayed in Guangzhou. while 长动作（持续进行，必须接进行时） 从句：过去进行时 主句：过去进行时/一般过去时 1. Jiajia felt scared while she was learning to swim. 2. While he was checking his notes, the teacher explained difficult ideas to him. when 与 while 的用法辨析（核心考点） 核心口诀 when 接短动作，时态可普可进行；while 接长动作，时态必须是进行。 长对长用 while，短对长用 when；主长从短用 when，主短从长用 while。 1.I was preparing dinner ______ my son arrived home. A. while B. when C. since D. if 答案：B 辨析：arrived 是短暂瞬间动词，从句短动作只能用 when；while 后必须接进行时长动作。 2.______ my grandpa was talking about his past life, I listened carefully. A. When B. While C. What D. Where 答案：B 辨析：从句为过去进行时持续性动作，优先用 while。 when 与 while 的用法辨析（核心考点） 3.They were planting trees ______ it began to rain. A. while B. when C. until D. though 答案：B 辨析：began to rain 是突发短暂动作，短动作用 when。 4.______ we were walking along the river, we saw many old houses. A. While B. When C. Before D. After 答案：A 辨析：前后都是持续进行的动作，长动作并行，固定用 while。 5.—Why didn’t you answer the phone? —I ______ a shower ______ you rang. A. took; when B. was taking; when C. took; while D. was taking; while 答案：B 辨析：“洗澡” 是当时持续进行的动作用过去进行时 was taking；rang 打电话是瞬间短动作，连词用 when。 核心易错点 1.过去进行时 vs 一般过去时 过去进行时：强调动作正在进行（未完成）→ He was reading at 9:00.（9点时他正在读，没读完） 一般过去时：强调动作完成→ He read a book yesterday.（昨天他读了一本书，读完了） 时态 核心侧重 标志性时间词 过去进行时 过去某刻正在做，动作未完成 at 8 yesterday, at that time, then 一般过去时 动作完整结束，有结果 yesterday, last week, ten years ago 核心易错点 2.while 从句的谓语动词 while 后不能接短暂性动词（如 join, find, stop），只能接持续性动词的-ing形。 判断句子正误。 1.While I met my old neighbour, I was walking along the old street ten years ago. 答案：❌ 辨析：while 后面只能接持续性、可用于进行时的动词；met（遇见）是瞬间短暂动词，不能用 while 引导，应改为 When。 2.While my grandma was chatting with friends, my grandpa was drinking tea. 答案：✅ 辨析：主从句都是持续性长动作，均使用过去进行时，两个并行长动作可用 while 连接，句子正确。 核心易错点 3.While the rain stopped, we went to visit the old houses in the town. 答案：❌️辨析：stopped（停止）是瞬间短动作，while 不能搭配短暂动词，连词改为 When。 4.While we lived in the small village, there were no tall buildings at all. 答案：❌️辨析：while 引导从句时，从句动词必须是进行时；lived 为一般过去时延续动词，这种场景只能用 when。 5.While my father was repairing his old bike, I helped him clean the yard. 答案：✅️ 辨析：从句 was repairing 是持续性进行动作，符合 while 的使用规则，句子无误。 课堂小结 过去进行时：was/were + doing，描述过去正在进行的动作，分清主谓搭配与 ing 变形。 when&while 核心区别： ✦ when：短动作 / 长动作都能用； ✦ while：只接持续长动作，从句必须用进行时，不可接瞬间动词。 易混对比：过去进行时重过程；一般过去时重结果。 题型要点：做题先看时间标志词、判断动作长短，再选择时态与连词 单项选择 1.—What were you doing at 8:00 last night? —I _____________ a story about success. A. read B. was reading C. am reading D. will read 2.We _____________ the match when our team won the first place. A. watch B. were watching C. watched D. are watching 3.Jiajia was scared of water _____________ she was learning to swim. A. when B. while C. because D. so B B B 4.— _____________ did you feel when you overcame your fear? —Happy and free. A. What B. How C. When D. Why 5.When the bell rang, the students _____________ their homework. A. do B. were doing C. did D. are doing 6.While he _____________ hard all term, his maths grade improved a lot. A. works B. worked C. was working D. is working B B C 7.—Where was Tom? —He _____________ in the library when I saw him. A. studies B. studied C. was studying D. is studying 8.She stepped into the water _____________ her heart was beating fast. A. when B. while C. if D. although 单句改错（每句1处错误） 1.He were practising swimming when he felt tired. _____________________________________________________________________ C B 错误点：were → was 辨析：主语 He 为第三人称单数，过去进行时中单数主语搭配 be 动词 was；were 只用于复数主语 /you。 2.While I joined the swimming club, I made many friends. _____________________________________________________________________ 3.At 9:00 yesterday, she reads a book about successful people. _____________________________________________________________________ 4.They was not watching the race when the winner crossed the line. _____________________________________________________________________ 错误点：While → When 辨析：join（加入）是瞬间短暂动词，while 从句只能接持续进行动作，短暂动词只能when 引导。 错误点：reads → was reading 辨析：at + 过去具体时间点，要用过去进行时，不能用一般现在时 reads。 错误点：was → were 辨析：主语 they 是复数，过去进行时搭配 be 动词 were，was 只用于单数主语。 教学课件 教学课件 Unit6 What disaster strikes 过去进行时 & when/while 用法辨析 Thank you for listening! 教学课件 $