Unit 5 语法专项—— 宾语从句（Object Clauses）课件 2025-2026学年沪外教英语八年级上册

教学课件 沪外教英语八年级上册 Unit 5语法专项—— 宾语从句（Object Clauses） 全解精讲+分层练习 1 学习目标 理解宾语从句的基本概念、结构及功能 掌握 that/if/whether/wh- 三大类引导词用法 牢记核心规则：宾语从句必须用陈述语序 能区分不同引导词的用法，避免混用 熟练完成单选、填空、句型转换、改错 能正确合并简单句为宾语从句，提升句式运用能力 宾语从句基本概念 含义：在句中充当宾语的从句，补充“说/想/知道”的内容 本质：用一个完整句子，作另一个句子的宾语 核心结构：主句 + 引导词 + 从句 主句：含有谓语动词（say/think/ask等）的完整句子 从句：紧跟引导词，表达具体内容的完整句子 例：I know （主句）that he is a student（从句）. 宾语从句核心结构拆解 主句：主语 + 谓语动词（宾从相关动词） 引导词：连接主句和从句的“桥梁”（that/if/what等） 从句：必须用陈述语序（主语在前，谓语在后） 简单记：主句 + 引导词 + 主语 + 谓语 + 其他 例：She asks（主句） if（引导词） I like music（从句）. 注意：从句是完整句子，有自己的主谓结构 引导词分类（总览） 宾语从句的引导词分三大类，按需选择 that 引导：陈述确定事实，无实义 if/whether 引导：表“是否”，不确定疑问 wh- 引导：what/when/where等，具体疑问 核心区别：引导词决定从句的含义和语气 共同点：所有引导词后，从句都用陈述语序 引导词1：that（陈述事实） 含义：无实义，仅起连接作用，表“陈述事实” 用法：口语中可省略，书面语可保留 常见主句动词：say, think, believe, hope, find, agree 例句1：I think (that) he is right. 例句2：She says (that) she likes traditional customs. 注意：从句是确定的事实，无疑问语气 that引导的例句拓展 He believes (that) the tradition will last long. We find (that) different cultures have common points. My teacher says (that) we should learn about other cultures. I hope (that) I can visit other countries one day. They agree (that) it’s important to respect cultural differences. 引导词2：if/whether（表“是否”） 含义：均表“是否”，引导不确定的疑问语气 用法：从句是疑问内容，不确定真假/结果 常见主句动词：ask, wonder, know, want to know 例句1：I wonder if/whether he will come. 例句2：She asks if/whether we like the new custom. 注意：if/whether 不可省略，从句用陈述语序 if vs whether 区别 相同点：均表“是否”，多数情况下可互换 不同点1：whether 可与 or not 连用，if 不可 例：I don’t know whether he will come or not. 不同点2：whether 可放句首，if 不可 例：Whether he will come is unknown.（本课不重点） 考试重点：两者互换即可，优先记 if/whether 通用 if/whether引导的例句拓展 Do you know if/whether they celebrate Spring Festival? I wonder if/whether she can help me with my homework. He asks if/whether we can use our left hand to shake hands. We want to know if/whether the custom is still popular. She wonders if/whether he has visited many countries. 引导词3：wh-疑问词（具体疑问） 常用疑问词：what, when, where, who, why, how 含义：表具体疑问（什么/何时/哪里等），有实义 特点：疑问词本身在从句中充当成分（主语/宾语/状语） 常见主句动词：ask, know, wonder, tell, forget, remember 例句1：I don’t know where he lives.（where 作状语） 例句2：She asks what I like to eat.（what 作宾语） wh-引导的例句拓展（1） Do you know what the custom means?（what 作宾语） He asks when the party will start.（when 作状语） I wonder where they come from.（where 作状语） She tells me who will come to the meeting.（who 作主语） We don’t know why he is late.（why 作状语） wh-引导的例句拓展（2） Can you tell me how I can get to the museum?（how 作状语） I wonder what he will bring to the party.（what 作宾语） She asks who can help her with the problem.（who 作主语） Do you know when the custom started?（when 作状语） He doesn’t know where he can put his bag.（where 作状语） 核心规则：陈述语序（重中之重） 宾语从句必须用陈述语序：主语 → 谓语 → 其他 错误语序：引导词 + 谓语 + 主语（疑问语序） 正确语序：引导词 + 主语 + 谓语 + 其他 错误：I don’t know where can I go. 正确：I don’t know where I can go. 口诀：宾从语序要记清，主前谓后才可行 语序易错辨析（1） 原疑问句：Where is the park?（疑问语序） 改为宾从：I don’t know where the park is.（陈述语序） 原疑问句：What does he like?（疑问语序） 改为宾从：She asks what he likes.（陈述语序） 关键：把疑问句的助动词（does/is）还原，调整主谓位置 语序易错辨析（2） 错误：He asks what is your name. 正确：He asks what your name is. 错误：I wonder when will he arrive. 正确：I wonder when he will arrive. 错误：Do you know how can I solve the problem? 正确：Do you know how I can solve the problem? 三大引导词对比表 引导词 含义 从句语气 常见主句动词 例句 that 无实义（陈述事实） 陈述语气 say, think, hope, believe I think that he is kind. if/whether 是否 疑问语气（不确定） ask, wonder, know I wonder if he will come. wh-词 具体疑问（什么/何时等） 疑问语气（具体内容） ask, know, tell, wonder She asks where he lives. 高频主句动词分类 接that引导：say, think, believe, hope, find, agree 接if/whether引导：ask, wonder, know, want to know 接wh-引导：ask, know, wonder, tell, forget, remember 万能动词：know, wonder 可接三种引导词 记忆口诀：陈述用that，疑问if/whether，具体疑问wh- 常见错误1：引导词误用 错误：She thinks if he is right.（think 后接事实，不用if） 正确：She thinks that he is right. 错误：I ask that he will come.（ask 后接疑问，不用that） 正确：I ask if he will come. 规则：根据主句动词和从句语气，选择对应引导词 常见错误2：语序错误（高频考点） 错误：I don’t know what can I do. 正确：I don’t know what I can do. 错误：He asks where is the library. 正确：He asks where the library is. 错误：Do you know why did he leave? 正确：Do you know why he left? 常见错误3：引导词省略不当 错误：I hope if he can come.（hope 后接事实，用that，可省略） 正确：I hope (that) he can come. 错误：She asks that I can help her.（ask 后接疑问，用if/whether，不可省略） 正确：She asks if/whether I can help her. 规则：that可省，if/whether不可省 题型一：单项选择 1.I think ______ it’s important to respect different cultures. A. that B. if C. what D. when 2. She asks ______ we can join the cultural party. A. that B. if C. where D. who 3. Do you know ______ the custom of giving gifts started? A. that B. if C. when D. whether 4. I wonder ______ they will have a big dinner on that day. A. that B. what C. if D. who 5. He tells me ______ he has learned about many traditions. A. that B. if C. what D. why A B C C A 6. Can you tell me ______ I should do to join the activity? A. that B. if C. what D. where 7. I don’t know ______ he will arrive at the airport. A. that B. if C. when D. whether 8. She believes ______ the old tradition will be passed on. A. that B. if C. what D. where 9. We want to know ______ can help us with the cultural report. A. that B. if C. who D. when 10.He asks ______ we prefer tea or coffee at the party. A. that B. whether C. what D. where C C A C B 题型二：用引导词填空（基础） 1.Can you tell me ______ the museum is located? 2.I wonder ______ they will celebrate the festival this year. 3. Do you know ______ he can speak English well? 4.She tells me ______ she has visited the cultural center. 5.We don’t know ______ we should bring to the party. where if/whether if/whether that what 题型三：篇章填空 Cultural differences are interesting. I want to know 1______ different countries have different customs. I ask my teacher 2______ I can learn more about them. She tells me 3______ reading books is a good way. I wonder 4______ I can find such books. I believe 5______ I can learn a lot from these books. why if/whether that where that 题型四：句型转换（1） 1.He thinks. The custom is very interesting.（合并为宾从） → He thinks ______ the custom is very interesting. 2.She asks. Can I help her with the report?（合并为宾从） → She asks ______ she can help her with the report. 3. I don’t know. Where is the cultural center?（合并为宾从） → I don’t know ______ the cultural center is. that if/whether where 题型四：句型转换（2） 4. They say. They will visit the old town.（合并为宾从） → They say ______ they will visit the old town. 5. I wonder. Will they come to the party?（合并为宾从） → I wonder ______ they will come to the party. 6.He asks. What should I do next?（合并为宾从） → He asks ______ he should do next. that if/whether what 题型五：补全对话 A: Do you know ______ we will have a cultural show? B: I think ______ it will be held next Friday. A: I wonder ______ I can join the show. B: You can ask our teacher ______ you can take part in it. A: Thank you. I believe ______ she will help me. when that if/whether if/whether that 综合总结（1） 宾语从句结构：主句 + 引导词 + 从句（陈述语序） 三大引导词： that：陈述事实，可省略，无实义 if/whether：表“是否”，不可省略，疑问语气 wh-词：具体疑问，有实义，充当从句成分 核心规则：从句必须用陈述语序（主前谓后） 综合总结（2） 易错点：引导词误用、语序错误、引导词省略不当 高频考点：单选（引导词选择）、句型转换（合并句子） 解题技巧：先判断从句语气，再选引导词，最后调整语序 写作加分：用宾语从句替代简单句，丰富句式 记忆口诀：宾从三要素，引导、语序、语气 拓展：宾语从句时态（基础） 主句为一般现在时，从句可根据句意用任意时态 例：I know he is a student.（一般现在时） 例：I know he will come.（一般将来时） 主句为一般过去时，从句需用相应过去时态（本课了解） 例：He said he was a student. 重点：八年级重点掌握“主句现在时，从句任意时” 教学课件 Unit 5语法专项—— 宾语从句（Object Clauses） Thank you for listening! 32 $