Unit2语法讲解及习题：if_whether引导宾语从句+疑问词引导宾语从句2026-2027学年译林版英语九年级上册

译林英语九上Unit2语法讲解及习题： if/whether引导宾语从句+疑问词引导宾语从句 一、语法板块 A：Object clauses introduced by if or whether（if/whether 引导宾语从句） （一）基础定义 if /whether 用来把一般疑问句转换成宾语从句，表达 “是否”，从句语序必须用陈述语序（主语 + 谓语）。 常用搭配动词：ask, wonder, see, find out, be not sure （二）核心用法区分 1. 通用场景：绝大多数情况 if 和 whether 可互换 例句（单元话题：青少年烦恼）： I wonder if/whether I can get on well with my parents. 我想知道我是否能和父母好好相处。 2. 只能用 whether，不能用 if 的固定场景 ① 介词后面：It depends on whether you have enough time. ② 后接 or not：I don’t know whether he will come or not. ③ 不定式 to do 前：She hasn’t decided whether to join the club. 3. 时态规则 主句现在时，从句按需任意时态；主句过去时，从句改为对应过去时态。 He wondered if his parents would understand him. （三）课本原句参考 1. She wonders if this is normal. 2. She asks whether her mum has any advice. 二、语法板块 B：Object clauses introduced by question words（疑问词引导宾语从句） （一）基础定义 特殊疑问词（what/who/whose/when/where/why/how）引导特殊疑问句转化而来的宾语从句，从句永远陈述语序，疑问词在从句中充当成分，不可省略。 （二）分类 & 例句 疑问词 含义 例句 who/whom 谁（主格 / 宾格） I don’t know who I can ask for advice.（我不知道我能向谁求助） what 什么 I don’t know what I should do with my stress.（我不知道该怎么处理压力） why 为什么 I can’t understand why my parents set so many rules.（我不理解父母为什么定很多规矩） how 怎样，如何 I’m not sure how I can communicate with my parents.（我不确定如何和父母沟通） where 哪里 I want to know where I can get useful advice.（我想知道去哪里获取有用建议） when 何时 She wonders when she can have a talk with her mum.（她想知道什么时候能和妈妈谈心） （三）关键规则 1. 语序：去掉疑问倒装，变回 “主语在前，谓语在后” 错误：I don’t know why am I upset. 正确：I don’t know why I am upset. 2. 时态：和 that 宾语从句时态规则完全一致 主句过去时，从句同步变过去相关时态。 He asked me where I spent my free time. 三、综合练习题 题型一：用 if /whether 填空 1. I don’t know _________ I can pass the monthly exam. 2. It all depends on _________ you are willing to talk with your parents. 3. She hasn’t decided _________ to tell her worries to her dad. 4. We are not sure _________ the teacher will give us less homework or not. 5. He wonders _________ his best friend will forgive him after their argument. 6. Could you tell me _________ I should join the after-school club? 7. I’m thinking about _________ I need to give up my hobby for study. 8. No one knows _________ the teenage problem will disappear soon. 题型二：填入合适疑问词（what/who/where/when/why/how） 1. I don’t understand _________ my parents always worry about my grades. 2. She wonders _________ she can turn to when she feels lonely. 3. Can you tell me _________ I can do to reduce my study stress? 4. I want to know _________ I can go to ask Mr Friend for help. 5. He is not sure _________ he can have a heart-to-heart talk with his mum. 6. Nobody knows _________ the teenagers can solve their problems alone. 7. I don’t know _________ time is suitable for me to communicate with Dad. 8. We all wonder _________ advice the youth worker will give us. 题型三：句型转换（合并句子，改写宾语从句） （1）一般疑问句改 if/whether 宾语从句 1. Will my parents understand me? I wonder. 2. Do I have too much schoolwork? I am not sure. 3. Can she get along well with her classmates? He asks. 4. Does this way of solving problems work? We want to find out. 5. Should I give up my favourite hobby? She hasn’t decided. （2）特殊疑问句改疑问词引导宾语从句 6. Why do I feel tired every day? I can’t figure out. 7. Where can I get advice on teenage stress? I want to know. 8. How can I balance study and hobbies? He wonders. 9. Who can help me with my friendship problems? I don’t know. 10. What should I do when I argue with my friend? She asks me. 题型四：单项选择 1. I wonder _________ I can share my worries with my parents. A. that B. if C. what D. who 2. She doesn’t know _________ she can do to relax herself after school. A. how B. whether C. what D. when 3. It depends on _________ you have enough courage to talk about your problems. A. if B. whether C. that D. what 4. Could you tell me _________ I can find the youth worker Mr Friend? A. where B. who C. whose D. why 5. He asked me _________ I was upset about my heavy homework. A. that B. whether C. what D. how 6. We are not sure _________ we should solve the problem alone or ask adults for help. A. if B. whether C. where D. when 7. I can’t understand _________ my parents don’t allow me to hang out after school. A. why B. how C. if D. whether 8. No one knows _________ will give us useful advice on teenage problems. A. which B. whom C. who D. whose 四、参考答案 + 逐题详细解析 题型一 if/whether 填空答案 + 解析 1. if/whether 解析：普通宾语从句，二者均可，表 “是否能通过月考” 2. whether 解析：介词 on 后，只能用 whether，不能用 if 3. whether 解析：不定式 to do 前，固定只用 whether 4. whether 解析：后面有 or not，固定搭配 whether...or not 5. if/whether 解析：wonder 后通用，二者均可 6. if/whether 解析：could you tell me 后通用，表 “是否该参加课外社团” 7. whether 解析：介词 about 后，只能用 whether 8. if/whether 解析：knows 后通用，表 “青少年烦恼是否会很快消失” 题型二 疑问词填空答案 + 解析 1. why 解析：句意：我不明白父母为什么总担心我的成绩，表原因用 why 2. who 解析：turn to sb 向某人求助，指人用 who 3. what 解析：do 后缺宾语，表 “做什么” 用 what 4. where 解析：询问去哪里找 Mr Friend 求助，地点用 where 5. how 解析：不确定怎样和妈妈谈心，表方式用 how 6. how 解析：青少年如何独自解决问题，方式用 how 7. when 解析：询问什么时间适合和爸爸沟通，时间用 when 8. what 解析：想知道辅导员会给出什么建议，事物用 what 题型三 句型转换答案 + 解析 一般疑问句改写 1. I wonder if/whether my parents will understand me. 解析：一般疑问句变宾语从句，用 if/whether 引导，疑问语序改为陈述语序。 2. I am not sure if/whether I have too much schoolwork. 解析：一般疑问句转化，陈述语序，if/whether 均可。 3. He asks if/whether she can get along well with her classmates. 4. We want to find out if/whether this way of solving problems works. 5. She hasn’t decided whether to give up her favourite hobby. 解析：decide 后接不定式结构，只能用 whether，不可用 if。 特殊疑问句改写 6. I can’t figure out why I feel tired every day. 解析：疑问词 why 引导，从句改为陈述语序 I feel tired。 7. I want to know where I can get advice on teenage stress. 8. He wonders how he can balance study and hobbies. 9. I don’t know who can help me with my friendship problems. 10. She asks me what I should do when I argue with my friend. 题型四 单项选择答案 + 解析 1. B 解析：wonder 后接一般疑问含义宾语从句，用 if 表 “是否”。 2. C 解析：do 缺少宾语，what 在从句中作 do 的宾语，意为 “做什么”。 3. B 解析：介词 on 后面，只能用 whether，不能用 if。 4. A 解析：询问地点 “在哪里找到辅导员”，用 where。 5. B 解析：主句 asked，从句是一般疑问含义，用 whether 表 “是否”。 6. B 解析：后面有 or not 结构，固定搭配 whether...or not。 7. A 解析：不理解父母不让放学后外出的原因，用 why。 8. C 解析：从句缺少主语，指人，用 who（谁会给我们建议）。 ( 1 ) 学科网（北京）股份有限公司 $