Unit 5 Section B & Self Check单元知识点讲解2022-2023学年人教版英语八年级下册

Unit 5 What were you doing when the rainstorm came? Section B & Self Check 教材知识全解 讲透知识 查漏补缺 知识点一 一般过去时的被动语态 教材原文 On this day, Dr. Martin Luther King was killed.这一天,马丁·路德·金博士被杀害了. 本句中的was killed是一般过去时的被动语态,其结构是“was/were+动词的过去分词”. He was sent to prison for stealing.他由于偷窃被关进监狱. The parcel was sent to the wrong destination.包裹被送错了目的地. 例1(2020重庆中考B卷)When I was young, I________ by my grandparents. A. look after B. looked after C. am looked after D. was looked after 解析 句意:当我小的时候,我爷爷奶奶照顾我.根据句意以及标志词by判断是被动语态,故排除A、B选项,再根据时间状语从句 When I was young,可判断是一般过去时态的被动语态,故答案选D. 答案 D 知识点二 in silence的用法 教材原文 My parents did not talk after that, and we finished the rest of our dinner in silence.在那之后,我的父母没有说话,我们默不作声地吃完了剩下的晚饭. 本句中的in silence是固定短语,意为“沉默;无声”,其中 silence是名词,意为“沉默;缄默;无声”. They hugged each other in silence for a long time.他们默默地拥抱了彼此很长时间. 拓展 同根词 silent adj.沉默的 keep silent保持沉默 silently adv.沉默地 -ly是副词后缀 silence n.沉默;无声 in silence沉默;无声 例2 (2020吉林德惠九中线上测试)They went out of the room in________ after they heard the bad news. A. fact B. excitement C. silence D. public 解析 句意:听到这个坏消息后,他们默默地走出了房间.in silence 意为“沉默;无声”,是固定搭配,符合题意,故答案选C. 答案 C 重点难点全解 精讲精解 精准高效 when和while引导的状语从句 when和while都可以用来引导时间状语从句,它们可以和过去进行时搭配,主句和从句的时态搭配是这 样的: 主句的时态 连词 从句的时态 过去进行时 when 一般过去时 一般过去时 while 过去进行时 过去进行时 while 过去进行时 When the rainstorm came, he was reading in the library.暴风雨来的时候,他正在图书馆看书. Someone came in while my mother was cooking.我妈妈正在做饭的时候,有人进来了. They were cleaning the classroom while you were playing games. 你们正在玩游戏的时候,他们正在打扫教室. 拓展 时间状语从句的引导词很多,常见的还有: before 在······之前 I wiped my shoes on the mat before I came in.我在进门前把鞋在垫子上擦了擦. after在······之后 I found your coat after you had left the house.你离开房子之后,我找到了你的外套. as当······的时候 He smiled as he passed.他路过时笑了笑. since 自从 Since his wife died, he's let himself go.自从他妻子死后,他就不修边幅了. until 直到 Let's wait until he comes back.咱们等到他回来吧. 温馨提示 since引导的从句多用一般过去时, 其所在句子的主句多用现在完成时. 单元语法全解 熟悉句型 把握要领 过去进行时的用法和句式变化 1.过去进行时的用法 过去进行时用于描述过去某个时刻正在发生的动作或存在的状态,它的基本结构是“