Unit1 Understanding ideas Grammar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if和because引导的状语从句，课堂从定义及例句导入，系统讲解条件（含if/unless辨析、主将从现等用法）和原因（含because/since辨析）状语从句，通过练习、语篇填空到撰写保护民间艺术故事，构建从理解到应用再到迁移创新的学习支架。 其亮点在于融合语法教学与文化传承，以民间艺术保护为主题，通过木偶戏等实例、语篇填空及故事写作，培养学生语言能力（正确运用从句完成语篇和写作）和文化意识（承担传承责任），同时通过辨析和改错提升思维品质。学生能将语法知识迁移到实际表达，增强文化责任感，教师可借助清晰结构和实例提高教学效率。

Unit1 Teenagers today Grammar Understanding ideas 学习目标 🔴 理解if和because引导的状语从句的用法；（学习理解） 🔴 正确运用if和because连接句子、完成语篇填空；（应用实践） 🔴 运用这两类从句，写一篇关于保护民间艺术、承担传承责任 的小故事。（迁移创新） 状语从句 用一个句子做状语来修饰主句，表示主句发生的时间，地点，原因，条件，结果等。 I often play basketball when I finish my homework. (时间) She draws pictures because she likes it. (原因) If it doesn’t rain tomorrow, we will go hiking. (条件) 状 语 从 句 1. 时间状语从句 （when, while, as, before, after, until...） 2. 地点状语从句 (where, wherever...) 3. 条件状语从句 (if, unless, as long as...) 4. 原因状语从句 (because, since, as, for...) 5. 目的状语从句 (so that, in order that...) 6. 结果状语从句 (so...that, such...that) 7. 让步状语从句 (though, although, even if, even though...) 8. 方式状语从句 (as, as if, as though...) 9. 比较状语从句 (than, as...as, ...) 条件状语从句 表示主句发生的条件或假设 If we keep exercising , we will stay healthy. 如果我们坚持锻炼，我们就会保持健康。 2. You will know more about the world if you read more. 如果你多读书，你就会更多地了解这个世界。 👉 位置：从句在前，逗号隔开；从句在后，两句连起来。 定义 条件状语从句 if 如果... 连词 unless 除非... If it is sunny tomorrow, we will go for a picnic. 如果明天天气晴朗，我们就去野餐。 2. You will miss the bus unless you hurry up. 除非你快点，否则你会错过公交车。 👉 其他的连词： as long as / so long as ”只要“， in case ”万一，以防” on condition that ”条件是” ， supposing (that) ”假如” unless +肯定句 = if + 否定句 = You will miss the bus if you don’t hurry up. if 与unless辨析 You will miss the bus unless you hurry up. ⚠易错警示：unless 后勿加否定词，否则双重否定导致语义混乱。 ❌ 错误：Unless you don’t give up. ✅ 正确：Unless you give up / If you don’t give up 条件状语从句 主将从现 用法 主情从现 主祈从现 If he comes here tomorrow, Iwill tell you. 如果他明天来这里，我会告诉你。 2. if you feel tired, you can have a short rest. 如果你感到疲惫，你可以暂时休息一下。 3. If you meet problems, call me anytime. 如果你遇到问题，随时给我打电话。 主句：一般将来时 主句：含有情态动词 从句：一般现在时 主句：祈使句 从句：一般现在时 从句：一般现在时 总结 条 件 状 语 从 句 从句做状语，表示主句发生的条件或假设。 从句在前，逗号隔开；从句在后，两句连起来。 if “如果”， unless“除非”， as long as“只要”...... ( if ...not = unless ) 主将从现，主情从现，主祈从现 定义 位置 用法 连词 👉 as long as / so long as ”只要“， in case ”万一，以防” on condition that ”条件是” ， supposing (that) ”假如” Exercise 选填 if / unless，或用所给单词正确形式填空。 1. ________ you trust your friends, you will get on well with them. 2. You won’t know the truth ________ you ask him yourself. 3. If she ________ (not arrive) on time, we will start without her. 4. Please ________ (enjoy) your holiday as long as you stay safe. 5. Unless he ________ (give) up his bad habits, he will have more trouble. If unless doesn’t arrive enjoy gives Exercise 1. If he ____ enough free time, he ____ the folk-art club. A. will have; joins B. has; will join C. has; joins 2. ____ away from the old folk art museum unless you ____ to lose such wonderful treasure. A. Don’t go; want B. Won’t go; will want C. Not go; want 3. If you ____ hard‑working, you ____ able to protect our traditional culture in the future. A. are; are B. will be; are C. are; will be 4. If more attention ____ to traditional folk arts, they ____ better in the future. A. will be paid; protect B. is paid; will be protected C. pays; will protect 原因状语从句 表示主句发生的原因 定义 He takes the underground because it saves him much time. 他乘坐地铁，因为这能帮他节省很多时间。 2. Because the city is very quiet , many people like living here. 因为这座城市十分安静，很多人喜欢住在这里。 👉 位置：从句在前，逗号隔开；从句在后，两句连起来。 原因状语从句 because因为 since既然 连词 Mark couldn’t come because he had to work. Mark来不了，因为他得工作。 Since everyone is here, let’s start. 既然大家都到齐了，那我们就开始吧。 其他的连词： as ”因为“， now that ”既然” considering that ”考虑到” ， seeing (that) “既然” 👉 ⚠ 易错警示：because/since 都不与so连用 ❌ Because folk arts are great, so we should protect them. ✅ Because folk arts are great, we should protect them. ✅ Folk arts are great, so we should protect them. because“因为”，用来回答why提出的问题 since“既然”，语气较弱，放在开头，表示显然的或已知的原因 because 与since辨析 I like puppets because they are full of magic. 我喜欢木偶因为它们充满魔力。 这句话可以用why 来提问： Why do you like puppet shows? 你为社么喜欢木偶表演？ Since everyone enjoys puppets, let’s learn more about it. 既然大家都喜欢木偶，那让我们来了解一下。 （已知事实） Exercise 选填 because / since 1. Tom doesn’t want to eat junk food ________ it is bad for his health. 2. ________ you have already finished your homework, you can go out for a walk. 改错练习 Because he likes travelling, so he visits many different cities every year. because since 错误：去掉 so / because ✅ Because he likes travelling, he visits many different cities every year. ✅ He likes travelling, so he visits many different cities every year. Exercise 1. Now find the sentences with ”if” or “because” in the passage. 在课文中找出 if / because从句。   2. Connect the sentences with “if” or “because”. 用if / because合并句子。 1.  More young people got to know this art. Zhan Haojing gave puppet shows at school. 2.  Wang Meng joins the traditional art club. She will learn how to protect traditional art. If I move my fingers, it will come to life! ...... More young people got to know this art because Zhan Haojing gave puppet shows at school. If Wang Meng joins the traditional art club, she will learn how to protect traditional art. 3. Complete the notice with ”if” or “because”. because if because If Introduce your own story about taking responsibility. 介绍你自己关于担负责任的小故事。 When did it happen? Where did it happen? Who was there? What did you do? How did you feel? Useful expressions: -- expressed their love for … -- encouraged me to … -- It was my responsibility to … -- will … if young people … -- I believe … Example: Last summer holiday, something meaningful happened at our community folk-art club. Some old artists and my classmates were there. Many old artists expressed their love for shadow puppet art. They encouraged me to introduce shadow puppets to more teenagers. I knew it was my responsibility to pass on our folk arts. If young people learn about shadow puppetry, they will help keep it alive. So I made short videos and shared them online. I felt really proud. I believe we should try our best to protect traditional arts because they are our great treasure. Thank You ! $