Unit 2 Teenage problems Grammar 课件 2026-2027学年译林版英语九年级上册

该初中英语课件聚焦宾语从句语法，核心讲解if/whether及疑问词引导的宾语从句用法，通过“日常问题导入—直接与间接问句对比—规则解析—分层练习”的脉络，搭建从感知到运用的学习支架。 其亮点是以“Teenage problems”为主题，融合语言能力（从填空到对话再到书信写作的递进练习）、思维品质（错误例句对比强化语序规则）、学习能力（小组讨论与分层作业促进主动探究）。例如通过“是否锁门”“如何沟通”等真实情境例句，帮助学生提升语言运用与问题解决能力，教师可借助清晰结构高效实施语法教学。

Unit 2 Teenage problems Grammar Learning Objectives By the end of this lesson, we will be able to： 1.use if or whether to introduce object clauses that express yes-no questions； 2. use question words (what, why, how, where, who) to introduce object clauses that express wh-questions； 3. complete sentences and a conversation using the correct object clauses, and write a short letter about our problems. Think about your day Do you ever have questions like these in your mind? Question: Did I pass the test? Will my friend call me? Is it going to rain tomorrow? How do we say these questions in a different way? From Question to Statement Direct Question Indirect Question Did I pass the test? Will my friend call me? Is it going to rain tomorrow? I wonder if I passed the test. I’m not sure if my friend will call me. I don’t know if it is going to rain tomorrow. When we use “I wonder”, “I’m not sure”, or “I don’t know”, we change the question into a statement word order. Object clauses introduced by if or whether Read the text below and pay attention to the object clauses introduced by if or whether. Amy often argues with her best friend about silly small things. She wonders if this is normal, so she talks to her mum about it. Amy asks her mum whether she has any advice. Her mum tells her to talk to her friend about the situation. Amy wants to improve their friendship, but she isn‘t sure if talking about it will help. What can you find in these sentences? if/whether + a statement sentence 表疑问 How do we use it? 1. if/whether 引导宾语从句的基本概念 当我们要表达一个一般疑问句的含义（即“是否……”）时，可以使用 if 或 whether 引导宾语从句。这种从句通常跟在某些动词后面，如：ask, wonder, know, see, find out, be not sure 等。 例句：I wonder if he likes this film. 我想知道他是否喜欢这部电影。 He asked me whether I would like to go with him. 他问我是否愿意和他一起去。 How do we use it? 2. 核心结构 主句 + if / whether + 宾语从句 （从句用陈述句语序（主语 + 谓语）） 结构示例：I wonder + if + he is right. I’m not sure + whether + she will come. 例句：I‘m not sure if it will rain tomorrow. 我不确定明天是否会下雨。 The teacher wanted to know whether we understood the problem. 老师想知道我们是否理解了这个问题。 How do we use it? 3. if 和 whether 的主要区别 区别 if whether 正式程度 与or not连用 后接不定式 位于介词后 口语/非正式 正式场合更常用 可以说 if...or not，但不能说 if or not 可以说 whether or not 或 whether...or not ❌ ✅ 可以 (whether to go) ❌ ✅ 可以 (talk about whether...) How do we use it? Tip： if 口语常用较随意，whether 正式更严谨； or not 连用用 whether，不定式前也用 whether。 对比例句： I don’t know if he will come. I don‘t know whether he will come. ❌ I don’t know if or not he will come. ✅ I don‘t know whether or not he will come. ❌ I’m not sure if to go. ✅ I‘m not sure whether to go. How do we use it? 4. 宾语从句的语序规则（重点） 无论主句是什么句式，宾语从句必须使用陈述句语序（主语 + 谓语），不能使用疑问句语序。 例句： I wonder if is he right.❌ I wonder if he is right.✅ She asked whether does he like tea.❌ She asked whether he likes tea.✅ I’m not sure if can she come. ❌ I‘m not sure if she can come.✅ How do we use it? 5. 常用动词和形容词归纳 动词 ask, wonder, know, see, find out, remember, forget, decide 形容词 sure, certain, not sure, uncertain 例句： I forget if I locked the door. 我忘了是否把门锁上了。 She decided whether to join the club. 她决定是否加入这个俱乐部。 I’m certain whether he is telling the truth.（否定句更常见） 我无法确定他是否在说实话。 How do we use it? 6. 拓展：if/whether 与 that 引导宾语从句的区别 that 陈述事实（无疑问） I know that he is a teacher. if / whether 表达“是否”（有疑问） I wonder if he is a teacher. 对比： I believe (that) he is honest.（陈述事实） I wonder if he is honest.（表达疑问） How do we use it? We use if or whether to introduce an object clause that expresses a yes-no question. Such an object clause often follows verbs such as ask, see, wonder and find out. The word order in the clause should be the same as that in a statement. Is this normal? She wonders if this is normal.✅ She wonders if is this normal.❌ Tip We often use whether instead of if in formal situations. e.g.:The teacher wanted to know whether the students were under a lot of stress. Let's practice I just had my History exam, and I don’t know (1) ________ I passed it. I know (2) ______ I tried my best, but I‘m not sure (3)_________ that’s good enough. I‘ll have to wait to find out. I really hope (4) ______ I do well at school this year. That’s why I work so hard every day. I‘m not sure (5) ________ I need to do more. I wonder (6) ______ it would improve my grades or just make me more stressed. From the bottom of my heart, I just want to succeed and feel proud of myself. A1 Amy is writing a diary entry about her studies. Complete it below using that or if/whether. if/whether that if/whether that if/whether if/whether A2 Talk with your partner about your learning problems, using object clauses introduced by if or whether. Let's practice Useful Sentence Frames: I’m not sure if... I wonder whether... I don’t know if... Do you know whether...? I often ask myself if... Object clauses introduced by question words Read the text below and pay attention to the object clauses introduced by question words. Teenagers often have problems with their parents. They do not always understand why their parents have so many rules. Although this is a common problem, many teenagers do not know what they should do. They are not sure how they can have an honest dialogue with their parents. They do not know who they can ask for advice either. Object clauses introduced by question words 1. 疑问词引导宾语从句的基本概念 当我们要表达一个特殊疑问句的含义（即“谁、什么、哪里、为什么、怎么……”）时，可以使用疑问词（what, which, who, whom, whose, when, where, why, how 等）引导宾语从句。这种从句通常跟在某些动词或形容词后面，如：know, understand, wonder, ask, tell, forget, decide, be sure 等。 例句：I don’t know what he wants. 我不知道他想要什么。 I don’t understand why he is angry. 我不明白他为什么生气。 Object clauses introduced by question words 2. 核心结构 主句 + 疑问词 + 宾语从句 （从句用陈述句语序（主语 + 谓语）） 结构示例： I don‘t know + what + he wants. She wonders + why + he is sad. Can you tell me + where + the station is? Object clauses introduced by question words 3. 宾语从句的语序规则（重点） 无论主句是什么句式，宾语从句必须使用陈述句语序（主语 + 谓语），不能使用疑问句语序。 ❌ ✔ I don’t know what does he want. I don‘t know what he wants. Can you tell me where is the station? Can you tell me where the station is? She asked why did he leave. She asked why he left. I wonder how can I get there. I wonder how I can get there. Object clauses introduced by question words 4. 疑问词引导宾语从句的常见动词和形容词 动词 know, understand, wonder, ask, tell, forget, remember, decide, see, find out, explain 形容词 sure, certain, not sure, unsure 例句：I can‘t decide which one I should choose. 我无法决定该选哪一个。 Please explain why you were absent. 请说明你缺勤的原因。 I’m not sure where he lives. 我不确定他住在哪里。 Object clauses introduced by question words 5. 拓展：宾语从句的简化结构（疑问词 + to do） 当宾语从句的主语与主句主语一致时，可以将从句简化为 “疑问词 + 不定式” 结构。 例句： I don’t know what I should do. →I don‘t know what to do. She wonders how she can go there.→She wonders how to go there. Can you tell me where I can find help?→Can you tell me where to find help? He forgot which way he should take.→He forgot which way to take. Object clauses introduced by question words 6. 拓展：疑问词引导宾语从句的时态呼应 宾语从句的时态通常要与主句时态保持一致。 主句时态 从句时态 例句 一般现在时 根据需要选择时态 I know where he lives. 一般过去时 相应的过去时态 I knew where he lived. 一般现在时（客观事实） 一般现在时 The teacher told us why the sun rises in the east. Object clauses introduced by question words 7. 拓展：if/whether 与疑问词引导宾语从句的对比 引导词 用途 例句 if/whether 表达“是否”（yes-no疑问） I wonder if he is a teacher. 疑问词 表达具体信息（wh-疑问） I wonder who he is. Work out the rule We use a question word to introduce an object clause that expresses a wh-question. The word order in the clause introduced by a question word should be _________ (different from, the same as) that in a wh-question. different from Let’s practice 1. My parents often stick to their own ideas. I don’t know ______ I can communicate with them. (Kitty) 2. I need someone to share my worries with. I wonder ______ I should go to for help. (Peter) 3. I‘ve tried my best, but I don’t understand ______ I still get low marks. (Amy) 4. My parents often come home very late. Sometimes I don‘t know ______ I can talk to them. (Sandy) 5. Sometimes I’m careless. I wonder ______ I can be more careful. (Paul) 6. I often have difficulty in expressing myself. Who can tell me ______ I should do? (Suzy) B1 The Class 1, Grade 9 students are talking about their problems. Complete each object clause below with the correct question word. how who why when how what Let’s practice 1. Why did I argue with my friends yesterday? Can I explain __________________________________________________? 2. Can Millie help me get along well with my friends? I wonder ______________________________________________________. 3. Where can I find useful articles on friendship? I want to know ______________________. I think I need to learn more about friendship. 4. How much sleep do we need every day? I wonder ______________________________________________________. 5. Do I need to buy an English dictionary? I am not sure ___________________________________________________. 6. Do the students need to exercise for two hours every day? Can you tell me __________________________________________________? 7. What would life be like without science? I cannot imagine _________________________________________________. B2 Daniel has some questions. Rewrite his questions by using object clauses introduced by if/whether or a question word. why I argued with my friends yesterday if / whether Millie can help me get along well with my friends. where I can find useful articles on friendship how much sleep we need every day if / whether I need to buy an English dictionary if / whether the students need to exercise for two hours every day what life would be like without science Let’s practice Sandy: Do you ever feel lonely, Millie? I know (1) ______ I often feel that way. But I‘m not sure (2) __________ that’s normal. Millie: Yes, sometimes I feel lonely too. Sandy: Do you have any advice? I‘m never sure (3) ______ I should do about it. Millie: I usually talk to my parents. That helps me. But I don’t know (4) _________ it will work for you. Sandy: I‘ll try, but my parents are always busy. I don’t know (5) ________ else I can talk to. Millie: I see your problem. Have you ever heard of Mr Friend? He’s a youth worker. He helps teenagers with their problems. Maybe you can write to him. Sandy: That sounds like a great idea. Now I know (6) ______ I can find help. Thanks, Millie. B3 Sandy and Millie are talking about their problems. Complete their conversation with that, if/whether or a question word. that if / whether what if/whether who where Let’s practice B4 Write a short letter to Mr Friend to talk about one of your problems, using object clauses introduced by that, if/whether and question words. Useful Sentence Frames: I know that... / I believe that... / I hope that... I wonder if... / I’m not sure whether... I don‘t know what... / Can you tell me how... / I don’t understand why... Group work Task: 1. Work in groups of 4. 2. Talk about your problems and ask for advice. 3. Use object clauses with if/whether or question words in your sentences. Sentence Help: I’m not sure (if / whether) I should talk to someone. I wonder (who) I can ask for help. I don‘t know (what) I should do about it. Can you tell me (how) I can solve this problem? I don’t understand (why) I always feel stressed. Example: I have a problem with my studies. I‘m not sure if I need to change my...(学习方法). I wonder who I can ask for advice. I don’t know what I should do to improve my grades. Show time language correct form(形式正确) accurate meaning(意义精确) proper use(使用恰当) performance gentle(仪态文雅) confidence (自信) OK Good Excellent 表演过后让学生进行投票 I don’t know what tomorrow may bring, but I know who I can turn to and how I can grow through every difficulty. Exercise Tom: Hi, Mary. I have a problem. I don’t know (1) ______ I should do about my maths homework. Mary: Have you asked the teacher for help? Tom: I’m not sure (2) __________ she has time to help me. Mary: I think (3) ______ she is always happy to help students. Tom: Do you know (4) ______ I can find her after class? Mary: She is usually in the office. You can ask her (5) _________ she can explain the problems to you. Tom: Thanks. I hope (6) ______ I can finish my homework on time. Complete the conversation with that, if/whether, or a question word. what if / whether that where if/whether that Rewrite each question using the given sentence starter. 1. Is she a good teacher? I wonder ________________________________________ 2. Where can I find useful books? I want to know ________________________________________ 3. Why did he say that? I don’t understand ________________________________________ 4. Does he like playing football? I’m not sure ________________________________________ 5. What should I do now? Can you tell me ________________________________________ if/whether she is a good teacher. where I can find useful books. why he said that. if/whether he likes playing football. what I should do now? Translate the following sentences into English. 1.我不知道他是否喜欢这部电影。 _______________________________________________________. 2.你能告诉我图书馆在哪里吗？ _______________________________________________________. 3.她想知道为什么他这么难过。 _______________________________________________________. 4.我不确定我是否应该接受这个建议。 _______________________________________________________. 5.请告诉我怎样解决这个问题。 _______________________________________________________. I don’t know if/whether he likes this film. Can you tell me where the library is? She wants to know why he is so sad. I’m not sure if/whether I should take this advice. Please tell me how to solve this problem. Homework Basic homework Practical homework Extended homework Complete the following exercises on page 126–127（A2、A3） of your workbook Write 2 sentences using if/whether and 3 sentences using wh-words (who, what, how, etc.) after verbs like wonder, ask, know, or think. Write a short letter to a friend about a problem (60-80 words). Use at least two if/whether clauses and two wh- clauses to describe your worries. Include one or two questions you'd like to ask for advice. Homework $