Unit 2 Grammar-when-where从句分析课件2026-2027学年外研版英语九年级上册

该初中英语课件聚焦时间与地点状语从句，通过例句分析导入，系统讲解when、where等引导词的结构与用法，衔接易错点（如时态搭配、when/while/as辨析）及分层练习，构建从基础规则到综合应用的学习支架。 其亮点在于结合实例对比（如时态错误与正确示例、when/while/as用法表格），通过填空、翻译、段落写作等多样练习，培养学生语言能力（语法理解与表达）、思维品质（分析与辨析）及学习能力（策略运用）。学生能巩固语法知识提升运用能力，教师可借助清晰结构高效开展教学。

Unit 2：Grammar 1.7.2013 Hello, everyone! Today, we're going on an exciting journey to explore one of the most amazing archaeological discoveries in China: Sanxingdui. Get ready to uncover the secrets of an ancient civilization! ‹#› Grammar Practice 1: Summarize the Rules Analyze the Sentence Patterns (a) When the tins are ready, put all your money into them. (b) Now let＇s get back where we started --the dreams tins. Rule 1: when（时间状语） Structure: Sentence, when +sentence. When +sentence, sentence. Rule 2: where（地点状语） Structure: Sentence+where +sentence. Where +sentence, sentence. Use: To express the time. Use: To express the place. 1.7.2013 Let's practice what we've just learned. Here are three sentences. Your task is to summarize the grammar rules for 'such...that', 'so...that', and 'so that'. Discuss with your partner and try to figure out the patterns. ‹#› 1.时间状语从句 如果我们用从句来表达一件事情或一个行为发生的时间，那么这个从句就叫时间状语从句。不同的引导词引导的时间状语从句的意思也不同。下面我们来看一下几种常见的时间状语从句: (1)when引导的时间状语从句 when意为“当......的时候”既可以表示在某一时间点发生的事，又可以表示在某一时间段发生的事。主句与从句描述的动作或事情可以同时发生，也可以先后发生。例如: When it is sunny, many people go out for a picnic. When I got home, I found my baby girl dancing in the sitting room. (2)as soon as引导的时间状语从句 as soonas意为“一......就......”，强调动作紧密相连。 例如:Mary’s family always go somewhere beautiful as soon as the vacation starts. We began to work as soon as we got to the office. (3)before/after引导的时间状语从句 before意为“在......之前”，after意为“在......之后" 例如:All things are difficult before they are easy. My mother sometimes cooks dinner after I come back from school. (4)while引导的时间状语从句 while引导的时间状语从句表示主句的行为在从句行为进行的过程中发生。由于while从句表示一个持续的行为，所以从句中要用持续性动词或状态动词，且持续性动词常用进行时态。例如: While they were crossing the Amazon Forest, many people died. Don't make any noise while I am recording. (5)until引导的时间状语从句 until表示动作或状态一直持续到某一时刻， 即“直到......为止”。例如: He waited until all the guests left. I will wait until you finish all the work. 否定句（not... until 表 “直到…… 才”）： He didn’t go to bed until he finished his homework. （规则：否定主句+ until 从句，表 “动作直到从句发生才开始”） (6)since引导的时间状语从句 since引导时间状语从句时，主句常用完成时，意为“自从......”。 例如:I have known Bill since he was born. He has studied very hard since he came to our school. 规则1：since 从句用一般过去时，主句用现在完成时。 Since I came to this school, I have made many friends. 规则2：It’s + 一段时间 + since 从句（用一般过去时，且从句动词为短暂性动词时，表 “动作结束多久”）。 It’s 3 years since I left my hometown.（表 “离开家乡 3 年了”） 一、易错点1：时态搭配混乱（核心考点：主将从现 / 主过从过） 不理解时间状语从句的时态逻辑——从句表 “将来动作” 时，不用将来时，用一般现在时（主将从现）；主句从句均表 “过去动作” 时，时态一致（主过从过）。 错误示例： When we will visit the industrial area tomorrow, we will wear masks.（×） As soon as the news reporter arrived at school, the students will cheer.（×） 正确示例： When we visit the industrial area tomorrow, we will wear masks.（√） （主将从现：从句用一般现在时表将来，主句用一般将来时） As soon as the news reporter arrived at school, the students cheered.（√） （主过从过：主句从句均用一般过去时，时态一致） — 常见连词：as soon as、when、before、after。 二、易错点2：when/while/as 的用法混淆 错误本质：不清楚三者的核心区别——动作的持续性 + 时态搭配。 连词 核心用法 时态搭配 错误示例 正确示例 when 可接短暂性 / 持续性动词 主现从现 主过从过 While he knocked at the door, I was doing homework.（×） When he knocked at the door, I was doing homework.（√） while 只接持续性动词 主句进行时 + 从句一般时 When my mother cooked, I watched TV.（×） While my mother was cooking, I watched TV.（√） as 强调 “同时进行”，语气较弱 主从时态一致 As we walk, we sing songs.（√）（表同时进行） - 关键口诀：while 接 “持续动作”，常用进行时；when “灵活”，可接短暂 / 持续动作；as“边…… 边……”。 Practice！(用跟时间相关的连词填空) When when When/ As until as soon as since before after While until I was watching TV ______ my father came back home yesterday evening. ______ she grew up, she became more interested in traditional folk arts. We will not start the meeting ______ all the students arrive. I will send you a message ______ I get to the folk art museum tomorrow. He has learned paper-cutting ______ he was ten years old. Please wash your hands ______ you have meals. We went out for a walk ______ we finished our homework last night. ______ my mother was cooking, I was practicing puppet shows in the room. I didn’t know the truth ______ my teacher told me. ______ you see the old artist, please ask him some questions about shadow puppets. The little boy cried ______ he saw his father at the hospital. It will be a long time ______ we can master all kinds of folk arts. I felt very relaxed ______ I finished visiting the art exhibition. ______ we walked along the street, we enjoyed beautiful paper-cut works on the wall. You can’t leave the classroom ______ the bell rings. My grandma told me old stories ______ she made paper-cuts. ______ the rain stops, we will go to watch the puppet show outside. They have protected local folk arts ______ 2018. I closed all the windows ______ I left my house this morning. ______ he was talking, all the listeners took notes carefully. Practice！(用跟时间相关的连词填空) as soon as before after As until while/as When/ As soon as since before While/As 2.地点状语从句 地点状语从句主要由表示地点的词(如where,wherever和anywhere等)引导。 Please keep sitting where you are. He is welcome wherever/anywhere he goes. Grammar Practice 2: Fill in the Blanks Complete the sentences with when or where. where when when where 1.7.2013 Now for some fill-in-the-blank exercises. Read the sentences carefully and choose the correct word: 'such', 'so', or 'so that'. Let's do the first one together. ... OK, now the second one. ... Time's up! Let's check the answers. ‹#› Grammar Practice 3: Complete the webpage with when or where. where when When where when when 1.7.2013 Excellent! For our final grammar task, let's rewrite a sentence using the patterns we've learned. The original sentence is 'It shows treasures from the Han Dynasty.' Can you rewrite it using 'such...that', 'so...that', and 'so that'? Try to make your sentences meaningful. ‹#› 1. 当我到达电影院时，电影已经开始了。 When I arrived at the cinema, the movie had already started. 2. 他走到哪里都受到人们的厌恶。 Wherever he goes, he is hated by people. 3. 自从我们进入大学后，我们的校园生活变得越来越丰富了。 Since we entered the college, our school life has become more and more colorful. Practice！(用when 和where翻译下列句子) 4. 直到雪停了，我们才出发去博物馆。 We didn’t set off for the museum until the snow stopped. 5. 爸爸在做饭的时候，我妈妈在打扫房间。 While my father was cooking, my mother was cleaning the room. 6. 在有山有水的地方，空气通常很清新。 Where there are mountains and rivers, the air is usually fresh. Practice！(用when 和where翻译下列句子) 7. 随着时间的推移，我们越来越清晰地明白努力的意义。 As time goes by, we understand the meaning of hard work more and more clearly. 8. 我将在你需要我的任何时候、任何地方帮助你。 I will help you whenever and wherever you need me. 9. 当老师走进教室时，学生们立刻停止说话。 When the teacher walked into the classroom, the students stopped talking at once. Practice！(用when 和where翻译下列句子) Summary & Homework Summary • We mastered the adverbial clauses: when and where. Homework 1. Review the key points and vocabulary from this lesson. 2. Write a short paragraph (about 80 words) about how to use money wisely by using when and where. 1.7.2013 That's all for today's lesson. Let's quickly summarize what we've learned. We talked about the amazing Sanxingdui and practiced some important grammar. For your homework, please review today's lesson and write a short paragraph about a historical site you like. See you next time! ‹#› $