Unit 6 语法专项—连词（so…that/unles/sas soon as)课件2025-2026学年人教版英语八年级下册

教学课件 新人教版八年级下册 Unit 6 语法专项——连词（so…that/unless/as soon as） 全解精讲+分层练习 1 学习目标 1. 理解so…that/unless/as soon as的核心含义及对应从句类型 2. 熟练掌握三大从句的结构、时态规则及同义替换技巧 3. 能区分易混点（so…that与such…that等），规避常见错误 4. 完成填空、选择、句型转换、语篇填空等多样题型练习 知识点1：so…that引导结果状语从句（核心概念） 核心含义：如此……以至于…… 从句类型：结果状语从句，说明主句动作带来的最终结果 核心逻辑：主句描述程度，从句呈现该程度引发的结果 本单元贴合：描述礼仪、习俗的特点及带来的影响 注意：结果多为客观发生，前后句有明显因果关联 so…that 核心结构与用法 基本结构：so + 形容词/副词 + that + 完整句子 结构拆解：so修饰形容词/副词，表“程度”；that引导结果 形容词搭配：so + adj.（如formal/rude）+ that 副词搭配：so + adv.（如quickly/carefully）+ that 关键：that不可省略，从句需用完整句式（主谓宾/主系表） so…that 例句精讲（贴合单元话题） 1. The greeting is so polite that everyone likes it.（adj.+that） （这种问候方式如此礼貌，以至于每个人都喜欢。） 2. He bowed so quickly that I didn’t react in time.（adv.+that） （他鞠躬太快，我没能及时反应过来。） 3. 错误：It’s so a formal custom that we don’t do it.（结构错误） 4. 正确：It’s such a formal custom that we don’t do it.（后续讲解） so…that 同义替换（such…that） 替换场景：当so修饰的形容词后接名词时，可用such…that替换 替换结构：such + a/an + 形容词 + 单数名词 + that 对比例句（原句vs替换句）： 原句：It’s so formal a custom that we don’t do it.（较少用） 替换句：It’s such a formal custom that we don’t do it.（常用） 注意：不可混淆so和such的位置，名词前必须加形容词 so…that 小试牛刀（单句填空） 用so/such…that填空，注意结构规范 1. The party is _______ interesting _______ everyone is happy.（so/such） 2. It’s _______ a polite greeting _______ we all reply to it.（so/such） 3. She speaks _______ softly _______ no one can hear her.（so/such） 4. They have _______ much food _______ we can’t finish it.（so/such） so that such that so that so that 知识点2：unless引导条件状语从句（核心概念） 核心含义：除非；如果不 从句类型：条件状语从句，表“唯一条件”，语气较强硬 同义替换：unless = if … not（可互换，unless更简洁） 本单元贴合：描述礼仪中的“前提条件”（如带礼物、直呼其名） 关键：从句表条件，主句表该条件下的结果 unless 核心结构与时态规则 基本结构：unless + 完整句子（从句），+ 主句（完整句子） 时态规则：遵循主将从现原则 从句：一般现在时（表将来）；主句：一般将来时/情态动词/祈使句 语序：从句可置于句首（加逗号）或句中（无逗号） 注意：unless本身表否定，从句中不可再加not（避免双重否定） unless 例句精讲+同义替换 1. You can’t enter the room unless you take off your shoes.（原句） 同义句：You can’t enter the room if you don’t take off your shoes. 2. Unless you are invited, don’t join their talk.（句首，祈使句主句） 3. She won’t help you unless you ask politely.（主句含情态动词will） 4. 错误：Unless you don’t hurry up, you will be late.（双重否定） unless 小试牛刀（单句填空/改写） 1. You can’t use his pen _______ he agrees. 2. Don’t touch the things _______ the owner allows you. 3. 改写：You can’t go out if you don’t finish your homework.（用unless） ________________________________________ 4. 改写：Unless you study hard, you can’t pass the test.（用if…not） ________________________________________ unless unless You can’t go out unless you finish your homework. If you don’t study hard, you can’t pass the test. 知识点3：as soon as引导时间状语从句（核心概念） 核心含义：一……就…… 从句类型：时间状语从句，表两个动作紧接着发生 核心特点：动作间隔极短，强调“即时性” 本单元贴合：描述礼仪中的连贯动作（如见面鞠躬、进门脱鞋） 注意：主从句动作均为将来发生时，遵循特定时态规则 as soon as 核心结构与时态规则 基本结构：as soon as + 完整句子（从句），+ 主句（完整句子） 时态规则：遵循主将从现原则（与unless一致） 从句：一般现在时（表将来）；主句：一般将来时/情态动词/祈使句 语序：从句可置于句首（加逗号）或句中（无逗号）注意：as soon as不可拆分，不能省略as或soon as soon as 例句精讲（贴合单元话题） 1. As soon as we meet our neighbors, we say “Good morning”.（句首） （我们一见到邻居，就说“早上好”。） 2. I will call you as soon as I arrive at the airport.（句中，将来时主句） 3. Please stand up as soon as the teacher comes in.（祈使句主句） 4. 错误：As soon as he will come, we will start the party.（从句用将来时） 5. 正确：As soon as he comes, we will start the party. as soon as 小试牛刀（单句填空/改写） 用所给动词的适当形式填空，或改写句子 1. As soon as she _______ (get) home, she will cook dinner.（填空） 2. We _______ (bow) as soon as we meet a stranger.（填空） 3. 改写：He will send a message to me when he arrives. ________________________________________ 4. 改写：As soon as the class ends, students go out to play.（换语序） ________________________________________ gets bow He will send a message to me as soon as he arrives. Students go out to play as soon as the class ends. 易混点辨析（一）：so…that vs such…that 1. 相同点：均引导结果状语从句，含义均为“如此……以至于……” 2. 不同点（核心）：修饰对象不同 so：修饰 形容词/副词（无名词） such：修饰 形容词+名词（名词必须出现） 3. 对比例句： so：She is so kind that everyone helps her.（修饰adj. kind） such：She is such a kind girl that everyone helps her.（修饰adj.+n.） 易混点辨析（二）：unless vs if 1. 关系：unless = if … not，可互换，但语气不同 unless：语气强烈，表“唯一条件”（除非……才……） if … not：语气平淡，表“假设条件”（如果不……就……） 2. 对比例句： unless：I won’t go unless you go with me.（你陪我才去，唯一条件） if…not：I won’t go if you don’t go with me.（只是假设，无唯一感） 易混点辨析（三）：三大连词时态对比 1. so…that（结果状语从句）：主从句时态保持一致 例：He was so tired that he fell asleep.（主过从过） 2. unless（条件）、as soon as（时间）：均遵循主将从现 例：Unless it rains, we will go.（从现主将） 例：As soon as he comes, we will start.（从现主将） 3. 易错点：混淆时态规则，给unless/as soon as从句用将来时 专项练习一：用所给连词填空 用so…that/unless/as soon as填空，每词可重复使用 1. ___________ you finish your homework, you can watch TV. 2. The movie is _______ moving _______ many people cry. 3. You can’t pass the exam _______ you study hard every day. 4. ______________ we arrive in Beijing, we will visit the Great Wall. 5. She runs _______ fast _______ no one can catch up with her. 6. Don’t open the box _______ your mother tells you to. 7. ___________ the bell rings, the students will go back to their seats. 8. It’s _______ a cold day _______ we don’t want to go out. As soon as so that unless As soon as so that unless As soon as such that 专项练习二：单项选择 1. The custom is _______ special _______ we all remember it. A. so; that B. such; that C. too; to D. enough; to 2. You won’t get good grades _______ you try your best. A. if B. unless C. as soon as D. because 3. _______ I see her, I will give her the gift. A. As soon as B. Unless C. So that D. If 4. It’s _______ a beautiful dress _______ she wants to buy it. A. so; that B. such; that C. too; to D. enough; to A B A B 专项练习二：单项选择 5. _______ you don’t hurry up, you will miss the school bus. A. Unless B. If C. As soon as D. Because 6. He will call me _______ he gets the news. A. as soon as B. unless C. so that D. if 7. She speaks English _______ well _______ she can talk with foreigners. A. so; that B. such; that C. too; to D. enough; to 8. You can use my phone _______ you keep it clean. A. unless B. if C. as soon as D. so that 9. _______ the rain stops, we will go for a walk. A. As soon as B. Unless C. If D. Because 10. The problem is _______ difficult _______ I can’t solve it. A. so; that B. such; that C. too; to D. enough; to B A A B A A 专项练习三：句型转换 按要求改写句子，每空一词，保持原意不变 1. The story is so interesting that all students like it. It’s _______ _______ _______ _______ ________all students like it. 2. You can’t go out unless you finish your homework. You can’t go out _______ you _______ _______ your homework. 3. As soon as we get up, we brush our teeth.（对划线部分提问） _______ _______ you brush your teeth? such an interesting story that if don’t finish When do 专项练习三：句型转换 4. He is so tall that he can reach the top of the shelf.（改写同义句） He is tall _______ _______ reach the top of the shelf.（too…to） 5. As soon as she arrives, she will help her mother cook.（换语序） She will help her mother cook _______ _______ _______ she arrives. 6. Unless you ask for help, no one will help you. _______ you _______ _______ ________help, no one will help you. enough to as soon as If don’t ask for 专项练习四：动词形式填空 结合三大连词，用所给动词的适当形式填空 1. As soon as he _______ (reach) the station, he _________ (call) me.（主将从现） 2. The room is so dirty that I _______ (want) to clean it at once.（时态一致） 3. Unless we _______ (hurry) up, we _______ (be) late for the meeting. 4. She _______ (cry) so loudly that her mother _______ (hear) her just now. 5. As soon as the teacher _______ (come) in, the students __________ (stop) talking. 6. You ___________ (not pass) the test unless you _______ (study) hard. reaches will call want hurry will be cried heard comes will stop won’t pass study 专项练习五：语篇填空 阅读短文，用so…that/unless/as soon as填空，使语篇通顺连贯 Different countries have different customs. 1. ____________ you go to a foreign country, you should learn its customs first. 2. _______ you don’t know the customs,you may make mistakes. 3. ____________ I arrived in Japan last year, I found the customs were 4. _______ different from ours 5. _______ I felt surprised. People bow to each other 6. _______ they meet. You can’t use their first names7. _______ you know them well. It’s 8. _______ an interesting culture 9. _______I want to learn more about it. Unless As soon as so that as soon as unless such that As soon as 专项练习六：判断正误并改正 判断下列句子正误，对的打“√”，错的打“×”并改正 1. It’s such cold that we stay at home. ( ) 改正：________ 2. Unless you don’t study hard, you will pass the exam. ( ) 改正：________ 3. As soon as he will come, we will have dinner. ( ) 改正：________ 4. She is so a lovely girl that everyone likes her. ( ) 改正：________ 5. You can’t go out unless you finish your work. ( ) 改正：________ 6. The movie is so moving that I cried. ( ) 改正：________ × × × × √ √ It’s so cold that we stay at home. Unless you study hard, you will pass the exam. As soon as he comes, we will have dinner. She is such a lovely girl that everyone likes her. 高频错题解析（重点突破） 1. 错题：It’s such hot that we don’t go out.（so/such混淆） 错误原因：hot是形容词，无名词，应用so修饰 改正：It’s so hot that we don’t go out. 2. 错题：Unless it will rain, we will go for a picnic.（时态错误） 错误原因：unless从句用了将来时，违背主将从现 改正：Unless it rains, we will go for a picnic. 3. 错题：As soon as I will arrive, I will call you.（时态错误） 知识总结1：三大连词核心用法（口诀记忆） 1. so…that：如此以至于，形容副词跟so，结果状语时态同 2. unless：除非如果不，条件状语表唯一，主将从现要牢记 3. as soon as：一就紧相连，时间状语表即时，从句现来主句将 4. 同义换：unless=if not，so…that换such…that，修饰名词才用such  知识总结2：三大从句对比表 连词 从句类型 核心含义 时态规则 关键提醒 so…that 结果 如此……以至于 主从句时态一致 修饰adj./adv. unless 条件 除非；如果不 主将从现 本身表否定 as soon as 时间 一……就…… 主将从现 不可拆分 课堂小结 1. 掌握了so…that/unless/as soon as三大连词的核心含义和结构 2. 理解了三大从句的时态规则，能区分易混点，规避常见错误 3. 学会了同义替换技巧，能完成多种题型的综合运用 4. 结合单元文化话题，能在语境中灵活运用语法知识 5. 重点：牢记口诀，熟练掌握主将从现和so/such的用法差异 教学课件 Unit 6 语法专项——连词（so…that/unless/as soon as） Thank you for listening! 31 $