Unit8 语法专项 过去进行时+复合词构词法课件 2025-2026学年译林版八年级英语上册

教学课件 译林英语八年级上册 Unit8 语法专项 +Word Power 过去进行时+复合词构词法 全解精讲+分层练习 1 学习目标 1.掌握过去进行时的定义、句型结构及时间状语搭配 2.精准区分when/while/as的用法，灵活连接时态 3.理解复合词的构词规则，熟记高频复合词 4.能完成填空、句型转换、单选等多样题型 5.能在语境中综合运用本单元语法和词汇知识 语法核心一：过去进行时 核心定义 过去进行时表示过去某一时刻或某一阶段正在进行的动作 强调动作在过去特定时间点“正在发生”，而非完成结果 核心特征：动作具有持续性，需结合时间状语或语境判断 常搭配时间状语：at 8 last night、this time yesterday、at that moment 过去进行时句型结构表 句型形式 完整结构 例句 肯定句 主语 + was/were + 动词-ing + 其他 She was drawing a picture at 9 last night. 否定句 主语 + was/were + not + 动词-ing + 其他 They were not playing football this time yesterday. 一般疑问句 Was/Were + 主语 + 动词-ing + 其他？ Were you listening to music when he came? 特殊疑问句 疑问词 + Was/Were + 主语 + 动词-ing + 其他？ What were you doing at 7 yesterday morning? 过去进行时 be动词选择规则 be动词用was还是were，由主语的人称和数决定 1.主语为I/he/she/it及单数名词 → 用was 例：He was reading a book. / The bird was flying. 2.主语为we/you/they及复数名词 → 用were 例：We were talking. / The children were running. 注意：不可混淆be动词形式，避免出现was搭配复数主语的错误 过去进行时 动词-ing形式变化规则 1.一般情况：直接加-ing → read→reading、play→playing 2.以不发音e结尾：去e加-ing → write→writing、take→taking 3.重读闭音节（辅+元+辅）：双写末尾辅音加-ing → run→running、stop→stopping 4.以ie结尾：变ie为y加-ing → lie→lying、die→dying 例：She was writing a letter. / They were running on the playground. 过去进行时 时间状语详解 1.具体时刻类：at 3 o'clock yesterday afternoon、last Sunday morning at 10 例：I was swimming at 2 pm yesterday. 2.阶段持续类：all morning yesterday、during the holiday last year 例：They were working all day yesterday. 3.从句引导类：when/while/as引导的时间状语从句 例：He was sleeping when the phone rang. 语法核心二：时间连词 when/while/as 用法辨析 连词 核心用法 动作类型搭配 例句 when 可指“某一点时间”或“一段时间” 长动作（进行时）+ 短动作（一般过去时） I was eating when the doorbell rang. while 仅指“一段时间”，强调动作同时性 长动作+长动作（均用进行时） While she was cooking, I was cleaning. as 强调“一边……一边……”，动作同步 长动作+长动作（可省进行时） He was singing as he walked home. when vs while 核心区别（易混点） 1.动作时长：when可接短动作（瞬间性）和长动作，while仅接长动作 错误：While the accident happened, I was walking. 正确：When the accident happened, I was walking. 2.时态搭配：when可连接“进行时+一般过去时”，while常连接“进行时+进行时” 3.位置灵活：when引导的从句可放句首或句末，while从句放句首需加逗号 as的特殊用法+三大连词实战运用 as侧重“动作同时发生”，可译为“一边……一边……” 例：She was watering flowers as her son was doing homework. 实战技巧： •短动作（如happen、ring、arrive）出现时，优先用when •两个持续动作同时进行，用while或as •强调动作伴随，用as Word Power 核心：复合词 定义与构词特点 复合词是由两个独立单词组合而成的新单词 新单词含义与原单词含义相关联，词性多为名词 构词特点：无需加连字符（部分特殊词除外），直接组合 核心作用：丰富词汇量，简化表达，高频用于日常交流 复合词高频构词类型表 构词类型 构词方式 高频词汇 例句 名词+名词 两个名词直接组合 thunderstorm、snowball、policeman、headache There was a heavy thunderstorm last night. 动词+名词 动词词根+名词 passport、playground、postcard、airport We bought postcards for our friends. 其他类型 特殊组合形式 sometimes、weekend、countryside、something We went to the countryside last weekend. 复合词 易错点+记忆技巧 1.易错拼写：headache（勿写headach）、airport（勿写airpot）、postcard（勿漏c） 2.词性判断：复合词多为名词，可作主语、宾语或表语 3.记忆技巧：拆分记忆，先记原单词含义，再组合理解 例：snow（雪）+ ball（球）→ snowball（雪球） 复合词 拓展词汇+语境例句 1.名词+名词：toothbrush（牙刷）、bookstore（书店）、classroom（教室） 例：I bought a new toothbrush this morning. 2.动词+名词：breakfast（早餐）、sunrise（日出）、notebook（笔记本） 例：We watched the sunrise by the lake. 3.其他类型：anywhere（任何地方）、everyone（每个人）、sometime（某时） 例：Everyone likes the new playground. 语法小练1：过去进行时填空 1.I ______________ (watch) TV when my parents came back. 2.They ______________ (not study) at 8 last night. 3.What ______________ you ______________ (do) this time yesterday? 4.The wind ______________ (blow) hard when we arrived. 5.She ______________ (read) a novel while her brother ______________ (play) games. 6.My sister ______________ (draw) a picture at 3 yesterday afternoon. was watching were not studying were doing was blowing was reading was playing was drawing 语法小练2：时间连词填空 选择when/while/as填空 1.______________ I was walking home, I met an old friend. 2.He was listening to music ______________ the rain started. 3.They were talking ______________ they walked along the street. 4.______________ the teacher was speaking, no one dared to talk. 5.The boy was riding a bike ______________ he fell off. 6.We were cooking ______________ our guests arrived. While/As when as While when when 词汇小练：复合词填空 根据提示组合复合词填空 1.A ______________ (police + woman) helped the lost child. 2.I have a ______________ (tooth + ache) and need to see a doctor. 3.We waited for our uncle at the ______________ (air + port) for two hours. 4.There will be a ______________ (snow + storm) tomorrow. 5.The students played games on the ______________ (play + ground) after class. 6.She sent a ______________ (post + card) to her pen pal in America. policewoman toothache airport snowstorm playground postcard 句型转换小练（一） 按要求改写句子，每空一词 1.He was playing basketball at 4 yesterday afternoon.（改为否定句） He ______________ ______________ playing basketball at 4 yesterday afternoon. 2.They were having dinner when the phone rang.（改为一般疑问句） ______________ they ______________ dinner when the phone rang? 3.She was reading a book in the library.（对划线部分提问） ______________ ______________ she reading a book? was not Were having Where was 句型转换小练（二） 1.While Tom was doing homework, his mother was cooking.（改为同义句） Tom was doing homework ______________ his mother was cooking. 2.I was watching TV at 8 last night.（对划线部分提问） ______________ ______________ you ______________ at 8 last night? 3.The children were running on the playground.（改为感叹句） ______________ ______________ the children were running on the playground! 4.He wasn't listening to music this time yesterday.（改为肯定句） He ______________ ______________ to music this time yesterday. while What were doing How happily was listening 单项选择小练（一） 1.My brother ______________ a kite when it began to rain. A. flies B. flew C. was flying D. is flying 2.______________ we were talking, the teacher came into the classroom. A. When B. While C. As D. Since 3.They ______________ not ______________ TV at 7 last night. A. was; watching B. were; watching C. was; watch D. were; watch 4.I saw a car accident ______________ I was walking to school. A. when B. while C. as D. B and C C B B D 单项选择小练（二） 1.What ______________ you ______________ at this time yesterday? A. do; do B. did; do C. were; doing D. are; doing 2.A ______________ is a place where people play games. A. playground B. postcard C. airport D. countryside 3.While my father ______________ the newspaper, my mother was washing clothes. A. read B. reads C. was reading D. is reading 4.It ______________ heavily when we left home. A. rain B. rains C. was raining D. rained C A C C 单项选择小练（三） 1.She ______________ a letter to her friend while she was waiting for the bus. A. writes B. wrote C. was writing D. is writing 2.My sister has a ______________, so she can't eat sweet food. A. headache B. toothache C. stomachache D. backache 3.______________ were you doing when the fire alarm rang? A. What B. When C. Where D. Who 4.They ______________ happily when I saw them. A. chat B. chatted C. are chatting D. were chatting C B A D 短文填空小练 用括号内单词的正确形式填空 Yesterday evening, it ______________ (rain) hard. I __________ ____ (do) my homework in my room. My parents ______________ (watch) TV in the living room. While we ______________ (stay) at home, our neighbor ______________ (knock) at the door. He wanted to borrow an umbrella. was raining was doing were watching were staying knocked 短文填空小练 Last Sunday, my family went for a picnic. When we arrived at the park, some children ______________ (fly) kites. My father ______________ (put) up the tent while my mother ______________ (prepare) food. I ______________ (take) photos of the beautiful scenery. Suddenly, a ______________ (thunder + storm) came. We quickly ran to the car. were flying was putting was preparing was taking thunderstorm 改错题小练 1.He was play football when the bell rang. 错误：______________ 改正：______________ 2.While the accident happened, she was walking. 错误：______________ 改正：______________ 3.They were not do their homework at 7 last night. 错误：______________ 改正：______________ 4.I have a headach because of cold. 错误：______________ 改正：______________ 5.What were you do at this time yesterday? 错误：______________ 改正：______________ 6.The policeman were helping the old man cross the street. 错误：______________ 改正：______________ play playing While When do doing headach headache do doing were was 易混点辨析 1.过去进行时vs一般过去时：前者表“正在进行”，后者表“完成结果” 2.when/while：when接短动作，while接长动作，同时进行用while 3.复合词拼写：注意headache、airport等易错词，勿漏写字母 4.动词-ing变化：重读闭音节需双写末尾辅音，如run→running 5.be动词搭配：单数主语用was，复数主语用were，不可混淆 知识梳理 1.过去进行时：was/were+动词-ing，表过去某时/阶段正在进行的动作 2.时间连词：when接短动作，while/as接长动作，区分时态搭配 3.复合词：名词+名词、动词+名词等构词类型，熟记高频词 4.核心考点：过去进行时句型、连词辨析、复合词拼写、动词-ing变化 5.解题技巧：先判断动作类型（长/短），再确定时态和连词 教学课件 Unit8 语法专项 +Word Power 过去进行时+复合词构词法 Thank you for listening! 28 $