Unit 8 "Once upon a Time" 复习讲义 一、核心考点详解(20个) 1. 一般过去时的构成与用法 规则变化:动词原形 + ed(play → played)。 不规则变化:需单独记忆(eat → ate, write → wrote)。 用法:描述过去发生的动作或状态,常搭配时间状语如 yesterday, last week, in 2020。 例题:She _____ (finish) her homework an hour ago. 答案:finished 解析:时间状语 "an hour ago" 表明动作发生在过去,finish 为规则动词,直接加-ed。 2. 过去进行时结构(was/were + doing) 用法:表示过去某一时刻正在进行的动作,常与 when/while 连用。 例题:While Tom _____ (watch) TV, his mother _____ (cook) dinner. 答案:was watching; was cooking 解析:while 引导两个同时进行的持续性动作,均用过去进行时。 3. 连词 when 与 while 的区别 when:可接瞬间动作或持续性动作(When he arrived, I was reading)。 while:仅接持续性动作(While I was reading, he arrived)。 例题:_____ the bell rang, we were having a meeting. 答案:When 解析:rang 是瞬间动作,只能用 when。 4. 直接引语转间接引语 步骤:调整时态(一般现在时 → 一般过去时); 替换人称(I → he/she); 修改时间/地点状语(today → that day, here → there)。 例题:Tom said, "I will visit my grandma tomorrow." → Tom said _____. 答案:he would visit his grandma the next day. 5. 情态动词表推测(must/can't/might) must:肯定推测(It must be true)。 can't:否定推测(He can’t be at home)。 might:可能性较低(It might rain)。 例题:The phone is ringing. It _____ be John; he’s in the library. 答案:can’t 解析:根据语境 "he’s in the library" 判断是否定推测。 (以下为部分考点,其余考点包括:形容词/副词比较级、动词不定式作目的状语、感叹句结构、固定搭配等,均配例题与解析。) 二、语法专项突破 1. 直接引语转间接引语易错点 时态不调整: 错误:He said, "I am tired." → He said he is tired. 正确:He said he was tired. 时间状语未修改: 错误:She said, "I’ll go today." → She said she would go today. 正确:She said she would go that day. 2. 过去进行时与一般过去时对比 区别:过去进行时:强调动作的持续性(I was reading at 8 p.m.)。 一般过去时:强调动作的完成(I read the book yesterday)。 练习:When I _____ (walk) to school, I _____ (see) a cat. 答案:was walking; saw 解析:walk 是持续性动作(进行时),see 是瞬间动作(一般过去时)。 三、题型解题技巧与练习 1. 完形填空三步法 步骤:通读全文,把握故事主线; 根据上下文逻辑选择选项; 复查时态和固定搭配。 例题:Once, a poor farmer _____ (find/found) a magic lamp. 答案:found 解析:故事背景为过去,需用一般过去时。 2. 阅读理解细节题技巧 方法:定位关键词,比对原文信息。 例题:(原文)The tortoise won because he never stopped. 问题:Why did the tortoise win 答案:Because he kept moving without stopping. 3. 写作技巧:叙事结构 模板:开头:Once upon a time...(背景); 发展:First... Then... Finally...(事件顺序); 结尾:The moral is...(寓意)。 练习:Write a story about "The Ant and the Grasshopper"(120词)。 范文:Once, an ant worked hard... The grasshopper laughed... Winter came... The ant survived... Moral: Work hard today for tomorrow. 四、综合练习与解析 1. 选择题 题目:What _____ you doing when the teacher came in A. ... ...