Unit 5 We have only one earth 语法课件2026-2027学年中职英语外研版（第二版）基础模块1

这是一份中职英语Unit 5第五课时的同步教学课件，围绕时间状语从句展开，包含学习目标、从句含义、核心引导词（when/while/before/after/as）用法（表格呈现特点、动词要求及例句）、易错点对比、分层练习（基础填空、提升改写）、高考翻译及总结，为学生提供系统学习支架。 资料特色鲜明，通过表格清晰对比引导词用法，结合when与while的动词要求差异等易错点辨析培养思维品质，分层练习兼顾基础与能力提升，高考翻译链接升学需求，助力学生语言能力与学习能力发展。教师使用可高效开展语法教学，帮助学生扎实掌握知识点，尤其适合中职学生巩固语法基础、应对升学考试。

英 英 语 语 Unit 5 We Have Only One Earth! 第五课时---Grammar —— 时间状语从句1 (when, while, before, after, as) 2 Learning Objectives 学习when, while, before, after, as在时间状语中的含义及用法，通过完成相关练习掌握其用法。 一、时间状语从句的含义 用来说明主句动作发生的时间，由 “时间连词” 引导的从句（简单理解：回答 “什么时候做某事”）。 二、核心引导词 + 用法 引导词 用法特点 动词要求 例句 when 1. 动作可 “同时 / 先后” 发生； 2. 可表 “正在这时，突然”; 任意动词（短暂 / 持续） 1.______________（当我骑车时） the bike, I fell down. 2.I was going out ________________ (当铃声响的时候). while 1. 从句动作是 “持续做的事”； 2. 可表 “对比（而）” 仅持续动词 While she _________________(一边听) music, she was dancing. 2. My brother was playing games __________________.（当我学习的时候） 3.I like rice _____（而）he likes noodles. When I rode when the bell rang was listening to while I was studying while 引导词 用法特点 动词要求 例句 as 1. 强调 “一边… 一边”，主从句动作同步进行; 2. 表“随着”时，多接持续性动作 持续动词 1.We talked as we walked.（我们一边走一边聊）； 2. As time goes by, we become more mature.（随着时间流逝，我们变得更成熟了。） 二、核心引导词 + 用法 二、核心引导词 + 用法 引导词 用法特点 动词要求 例句 before 主句动作在从句 “之前” 发生；   任意动词 1.I always wash my hands____________ (在我吃东西之前). 2.She had left_________________.（我到之前） after 主句动作发生在从句之后，从句动作先完成 任意动词 1.____________________ (他完成作业之后) his homework, he went to the library. 2. We will go hiking ________________.（雨停之后） before I eat before I arrived After he finished after the rain stops 三、高频易错点对比 when vs while： ① when可接短暂性/持续性动词，while仅接持续性动词； ② 表“两个动作同时进行”用while，表“一个动作进行中，另一个动作突然发生”用when。 例： 改正下句子：While the rain started, we were walking. 原因：____________________________________________ When 参照第②点。while只能用于持续性动词。 before/after的时态逻辑：若主句用过去完成时（had done），从句用一般过去时（did），强调“从句动作先完成”。 例：She had studied English for 3 years before she went to college.（上大学前，她已经学了3年英语。） 三、高频易错点对比 四、课堂分层练习 基础题：选择合适的引导词填空（when/while/before/after/as） 1._________ I was cooking, my son was doing his homework. 2. We usually go for a walk __________ dinner. 3. ____________ he arrived at the station, the train had left. 4. She was reading a novel _____________ the light went out. 5. _________ the weather gets warmer, we can go swimming. While after Before/ when when As 四、课堂分层练习 提升题：改写句子（用括号内的引导词连接两个句子） 1. I finished my homework. I watched TV.（after） _____________________________________________ 2. He was playing football. He hurt his leg.（when） _____________________________________________ 3. We must clean the classroom. We leave school.（before） _____________________________________________ 4. The sun was rising. We climbed the mountain.（as） ______________________________________________ After I finished my homework, I watched TV. He hurt his leg when he was playing football We must clean the classroom before we leave school. As the sun was rising, we climbed the mountain. 连线高考：翻译句子 1. I liked listening to music _____________________(当我年轻的时候) 2. He went to play basketball ________________________(他做完作业后). 3. ________________________（随着科技的发展），our life becomes more convenient. 4. She had studied English for 3 years _____________________.（上大学前） 5. ________________________(当我正在看电视时), my mom came back. when I was young. after he finished his homework. As technology develops, before he went to college When I was watching TV SUMMARY 记准5个引导词的核心含义： when（当……时/这时）、 while（当……时/同时）、 before（在……前）、 after（在……后）、 as（当……时/一边/随着）； 2. 牢记when与while的区别、before/after的时态逻辑； 3. 从句可位于主句前（加逗号）或后（不加逗号）。 $