Unit3 课时6 Grammar in Use (课件)【趣味课堂】英语仁爱版2024八年级上册

Exploring Lesson 6 Grammar in Use Prefixes & need to/don’t need to/needn’t do Unit 3 Sound Body, Sound Mind 单击此处输入标题文本 1 Lesson Objectives: In this lesson, we will be able to: 1. Master prefixes (non-, dis-, un-, mis-, in-, im-) and the usage of "need" as a main verb and modal verb. Grasp new words like unhealthy, sleepy, lose weight ect. 2. Skillfully use words with negative prefixes and "need" structures to talk about healthy habits and give suggestions in pair or group activities. 3. Evaluate personal living habits using learned grammar, cultivate health awareness, and care about others' well-being. 单击此处输入标题文本 2 Lead in Look and say What’s wrong with you? I ____________________. I eat too many hamburgers today. Eating too many hamburgers is unhealthy. You need to eat more vegetables. /ʌn'helθi/ adj.不健康的 have a stomachache healthy 健康的→ unhealthy 不健康的 need to do sth. 需要做某事 单击此处输入标题文本 3 Lead in Look and say I also stay up late playing games. An improper habit does harm to your health. You need to sleep early. ·stay up late to do 强调的是熬夜的 目的性，表示某人为了做某事而熬夜。 ·stay up late doing 则更侧重于描述 熬夜过程中持续进行的某个具体行为。 proper 恰当的→ improper 不适当的 need to do sth. 需要做某事 /ɪm'prɒpə(r)/ adj.不正确的 单击此处输入标题文本 4 Now, let's learn more prefixes(前缀) and how to use 'need' in our textbook. healthy 健康的→ unhealthy 不健康的 proper 恰当的→ improper 不适当的 need to do sth. 需要做某事 ↓ ↓ un-, im- 为否定前缀，它们可以改变单词的含义, 表示否定、相反或缺乏的意思。 单击此处输入标题文本 5 Activity 1 Look at the pictures and read the sentences. Pay attention to the words in bold. TIPS The prefixes non-, dis-, un-, mis-, in- and im- usually express the opposite meanings of the original words. He became a non- smoker in order to keep healthy. Sea food may seem to disagree with some people. Hamburgers may taste delicious, but it is unhealthy to eat too many of them. It is incorrect to do sports with an empty stomach. smoker 吸烟者→ nonsmoker 不吸烟的人 agree 同意→ disagree 不同意 healthy 健康的→ unhealthy 不健康的 correct 正确的→ incorrect 不正确的 prefix n. 前缀 /'priːfɪks/ 单击此处输入标题文本 6 Language points Activity 1 1. He became a non-smoker in order to keep healthy. 他为了保持健康，戒了烟。 1) in order to 表示 “为了、以便”，引导目的状语， 强调做某事的目的，可与to, so as to互换。 肯定式：in order to + 动词原形 否定式：in order not to + 动词原形 e.g. He studies hard in order to pass the exam. 他努力学习是为了通过考试。 She spoke quietly in order not to wake the baby. 她轻声说话，以免吵醒宝宝。 2) keep healthy 表示 “保持健康” 同义表达：stay healthy; keep fit 练习：他们每天训练，为了赢得比赛。 They practice daily ______________ win the competition. He became a non- smoker in order to keep healthy. in order to/to 单击此处输入标题文本 7 Language points Activity 1 2. Sea food may seem to disagree with some people. 海鲜可能似乎不适合有些人（吃）。 1) seem 表示 “似乎；好像；看来”，用来描述主语 给人的印象或判断，不强调事实本身，而是主观感受。 seem to do sth. 似乎做某事 e.g. She seems to enjoy reading. 她似乎喜欢读书。 It seems that + 从句 似乎……；看来…… e.g. It seems that he is late for class. 看来他上课迟到了。 拓展: 否定形式：seem not to do sth. 或 It doesn’t seem that + 从句 seem + 形容词 似乎…… 的 e.g. The problem seems difficult. 这个问题似乎很难。 练习：(1) He seems ______ when he hears from his girlfriend. A. happily B. happy C. to happy (2) The weather seems ________ everyone. A. to affect B. affect C. affects Sea food may seem to disagree with some people. B A 单击此处输入标题文本 8 Language points Activity 1 2. Sea food may seem to disagree with some people. 海鲜可能似乎不适合有些人（吃）。 2) disagree with 此处为 “（食物、气候等）不适合；使不舒服” disagree with sb. 不适合某人 e.g. Spicy food disagrees with my stomach. 辛辣食物不适合我的胃。 拓展：disagree with “不同意；持不同意见”，主语通常是人，宾语可以 是某人、观点或计划等。 反义短语：agree with 同意;（气候、食物等）适合于 e.g. I disagree with his decision. 我不同意他的决定。 练习：—Doing some sports is good for health. —________ I do sports every day. A. I disagree with you. B. I agree with you. C. Take it easy. D. Forget it. B 别紧张 忘了它 单击此处输入标题文本 9 Language points Activity 1 3. It is incorrect to do sports with an empty stomach. 空腹做运动是不正确的。 1) It's + adj. + to do sth. "做某事是...的" 其中 “it” 是形式主语，真正的主语是后面的不定式短语 “to do sth.”，避免句子因主语过长而显得头重脚轻。 e.g. It is unhealthy to eat too many hamburgers. 吃太多汉堡包是不健康的。 拓展：It's + adj. +(for sb.) to do sth. "(对某人来说)做某事是...的" 2) with an empty stomach “空腹；饿着肚子” “with + 名词短语” 结构，表示 “处于…… 状态；带着……”，在句中 作状语，说明动作发生的伴随状态。如：with long hair 留着长发 e.g. The girl ran into the room with a smile. 女孩笑着跑进了房间。 练习：To say goodbye to you is so hard. (用It is... to do sth.改写) __________________________________________ It is incorrect to do sports with an empty stomach. It is so hard to say good bye to you. 单击此处输入标题文本 10 Prefix 前缀 grammar 一、概念：前缀是加在单词开头的词缀（affix），用于 改变、限制或加强原词的含义，但不改变原词的词性。 二、用法特点： ·改变词义： e.g. happy (adj. 开心的) + un- → unhappy (adj. 不开心的) smoker (n. 吸烟者) + non- → nonsmoker (n. 不吸烟者） ·拼写规则：前缀与原词结合时，一般不改变原词的拼写 e.g. possible (adj. 可能的) + im- → impossible (adj. 不可能的) ·语境区分：同一前缀可能有多种含义，需结合语境判断。 e.g. un- 既可表否定(unhappy)，也可表逆转动作(unlock 解锁)。 单击此处输入标题文本 11 grammar 三、常见前缀分类及用法（按语义功能） 1. 否定前缀（表示 “不、非、无”）最常用的一类, 用于否定原词的含义。 前缀 含义 常见搭配 （原词→派生词） 例句 un- 强烈否定, 常带贬义 “不/非” healthy → unhealthy (不健康的) happy → unhappy (不开心的) Eating junk food is unhealthy. non- 中性否定，仅表示“无/非” smoker → nonsmoker (不吸烟者) stop → nonstop (不停的) He took a nonstop train to Shanghai. dis- 表示相反/剥夺 “不、相反” agree → disagree (不同意) like → dislike (不喜欢) She disagrees with this plan. 否定前缀(non-, dis-, un-, mis-, in- 和 im-) 单击此处输入标题文本 12 grammar 三、常见前缀分类及用法（按语义功能） 1. 否定前缀（表示 “不、非、无”）最常用的一类, 用于否定原词的含义。 前缀 含义 常见搭配 （原词→派生词） 例句 in- 不(常用于除r、l、b、m、p以外的其他字母开头的单词) correct → incorrect (不正确的) direct → indirect (间接的) active → inactive (不活跃的) It’s incorrect to lie to(撒谎) your parents. im- 不(用于以 p/b/m 开头的词，避免 发音困难) possible → impossible (不可能的) polite → impolite (不礼貌的) It’s impossible to finish it in 5 minutes(5分钟内). mis- 错误地(把原本正确的动作变成错误的行为) place → misplace (放错) understand → misunderstand (误解) I often misplace my keys. 否定前缀(non-, dis-, un-, mis-, in- 和 im-) 单击此处输入标题文本 13 grammar 三、常见前缀分类及用法（按语义功能） 2. 反义前缀（表示 “相反动作”）主要用于动词，表达与原词相反的动作。 前缀 含义 常见搭配 （原词→派生词） 例句 un- 逆转动作 lock → unlock（解锁） do → undo（解开） cover 覆盖 → uncover 揭开 He unlocked the door with a key. 他用钥匙打开了门。 dis- 相反动作 appear 出现→ disappear 消失 The sun disappeared behind a cloud.太阳消失在云层后 否定前缀(non-, dis-, un-, mis-, in- 和 im-) 单击此处输入标题文本 14 Prefix 前缀 grammar 三、常见前缀分类及用法（按语义功能） 3. 程度前缀（表示 “过度、不足、半”） 前缀 含义 常见搭配 （原词→派生词） 例句 over- 过度、超过 work → overwork（过度工作） eat → overeat（暴饮暴食） Overworking is bad for health. under- 不足、低于 estimate → underestimate(低估) pay → underpay（少付工资） Don’t underestimate his ability(能力). semi- 半 circle → semicircle（半圆） final → semifinal（半决赛） The playground has a semicircle track(轨道). 单击此处输入标题文本 15 Prefix 前缀 grammar 三、常见前缀分类及用法（按语义功能） 4. 态度前缀（表示 “支持、反对”） 前缀 含义 常见搭配 （原词→派生词） 例句 pro- 支持、亲 America → pro-American(亲美的) progress → progressive(进步的) He holds pro-environment views. 他持有支持环境的观点。 anti- 反对、抗 virus → antivirus（抗病毒的） war → antiwar（反战的） This medicine is antivirus. 这种药是抗病毒的。 单击此处输入标题文本 16 Prefix 前缀 grammar 三、常见前缀分类及用法（按语义功能） 5. 时间 / 位置前缀（表示 “前、后、超”） 前缀 含义 常见搭配 （原词→派生词） 例句 pre- 在… 之前 view → preview（预习） war → prewar（战前的） Preview the text before class. post- 在…之后 war → postwar（战后的） graduate → postgraduate(研究生) Postwar life was hard for them. super- 超过, 超级 man → superman（超人） market → supermarket (超市) We often shop in the supermarket. 单击此处输入标题文本 17 Activity 2 Fill in the blanks with the correct form of the given words. dislike uncomfortable impossible nonstop misplace 1. It is ______________ to keep healthy without good living habits. 2. Don’t eat too much junk food, or you will feel ______________. 3. She ______________ ice cream because it’s bad for her teeth. 4. My sister’s room is tidy, and she never ______________ her things. 5. We felt very tired after a long and ______________ walk. impossible dislikes misplaces nonstop good living habits 良好的生活习惯 too much 太多(修饰不可数名词) feel uncomfortable 觉得不舒服 be bad for 对....有害 uncomfortable 单击此处输入标题文本 18 Language points Activity 2 1. It is ______________ to keep healthy without good living habits. 2. Don’t eat too much junk food, or you will feel ______________. 3. She ______________ ice cream because it’s bad for her teeth. 4. My sister’s room is tidy, and she never ______________ her things. 5. We felt very tired after a long and ______________ walk. impossible 没有良好的生活习惯，就不可能保持健康。 1. 1) 句型：It's + adj. + to do sth. “做某事是…… 的” 2) impossible adj. “不可能的”，由否定前缀 im- + possible(可能的) 构成，可作表语或定语。反义词：possible 可能的 副词形式：impossibly 不可能地 e.g. It's impossible for a child to lift this heavy box. 对一个孩子来说，举起这个重箱子是不可能的。 3) without prep. “没有；不借助”，后接名词、代词或动名词。 与 with（有；用）构成反义。 e.g. Without your help, I couldn't have finished it. 没有你的帮助，我不可能完成。 练习：The driver stopped the bus without ________ twice. A. think B. thinking C. to think D. thought B 单击此处输入标题文本 19 Language points Activity 2 1. It is ______________ to keep healthy without good living habits. 2. Don’t eat too much junk food, or you will feel ______________. 3. She ______________ ice cream because it’s bad for her teeth. 4. My sister’s room is tidy, and she never ______________ her things. 5. We felt very tired after a long and ______________ walk. uncomfortable 不要吃太多垃圾食品，否则你会觉得不舒服。 2. 1) 否定祈使句 + or + 将来时陈述句 “如果不避免做某事，就会....” 肯定祈使句 + or + 将来时陈述句 “如果做某事，就会...(有不好的结果)” e.g. Don’t run in the hall, or you may fall down. 不要在走廊跑步，否则你可能会摔倒。 Hurry up, or you will miss the bus. 快点，否则你会错过公交车。 拓展：反义句型： 祈使句 + and + 陈述句 “如果做某事，就会...(有好的结果)” e.g. Work hard, and you will succeed. 努力工作，你就会成功。 练习：(2025 吉林 中考真题) _______, Tutu, or you will be late for class. Only two minutes left. A. Hurry up B. To hurry up C. Hurrying up D. Hurried up A 单击此处输入标题文本 20 Language points Activity 2 2. 2) too much 副词短语, 意为 “太多”，用于修饰不可数名词。 e.g. She drinks too much coffee. 她喝太多咖啡了。 可单独使用（指代不可数事物）： e.g. You’ve eaten too much. 你吃得太多了。（指代 “食物”，不可数） too much 还可修饰动词，通常表示动作过度或过量。 e.g. She watches TV too much. 她看电视太多。 拓展：易混淆短语辨析 短语 用法 例句 too much “太多” 修饰不可数名词 There’s too much water in the bottle. too many “太多” 修饰可数名词复数 She has too many toys. much too “太……” 修饰形容词 / 副词 The dress is much too expensive. 不要吃太多垃圾食品，否则你会觉得不舒服。 单击此处输入标题文本 21 闯关练习 1. —You’d better listen to the teacher carefully, or you ________ learn English well. —OK, I will. A. don’t B. can C. will D. won’t 2. It’s impossible for us ________ there by plane in two hours. A. to get B. get C. getting D. got 3. 用 “too much”“too many”“much too” 填空： He spends ____________ time on his phone. There are ____________ people in the park. The math problem is ____________ difficult for me. D A too much too many much too 单击此处输入标题文本 22 Activity 3 Read the text and fill in the blanks with the words in the box. impatient nonsense uncomfortable improper A(n) ____________ habit does a lot of harm to people. For example, staying up late is very bad for people’s health. Clearly, they will feel sleepy and ______________ next day. What’s worse, people will become ____________ and they may even forget important dates. Sometimes, they will speak ____________ because their minds are not clear. To get rid of the habit, To get rid of the habit, people need to do some sports and sleep early. A healthy body and a clear mind will make them feel good all day. improper uncomfortable impatient nonsense 单击此处输入标题文本 23 Language points Activity 3 impatient nonsense uncomfortable improper A(n) ____________ habit does a lot of harm to people. For example, staying up late is very bad for people’s health. Clearly, they will feel sleepy and ______________next day. What’s worse, people will become ____________ and they may even forget important dates. Sometimes, they will speak ____________ because their minds are not clear. To get rid of the habit, To get rid of the habit, people need to do some sports and sleep early. A healthy body and a clear mind will make them feel good all day. uncomfortable do harm to 对……有害 a lot of 许多 for example 例如 be bad for 对…有害 what’s worse 更糟的是 speak nonsense 胡说八道 get rid of 摆脱，除去 do some sports 做运动 健康的身体和 清醒的头脑 make sb. do... 让某人做某事 all day 整天 improper impatient nonsense feel sleepy 犯困 反义词：patient 有耐心的 stay up late 熬夜 单击此处输入标题文本 24 Activity 3 Read again and complete the tasks. An improper habit does a lot of harm to people. For example, staying up late is very bad for people’s health. Clearly, they will feel sleepy and uncomfortable next day. What’s worse, people will become impatient and they may even forget important dates. Sometimes, they will speak nonsense because their minds are not clear. To get rid of the habit, people need to do some sports and sleep early. A healthy body and a clear mind will make them feel good all day. 2. Mark T(True) or F(False). 1) Staying up late only makes people feel sleepy, not angry. ( ) 2) Speaking nonsense is a possible result of poor sleep. ( ) 3) The text suggests that exercise can help get rid of bad habits. ( ) F T T 单击此处输入标题文本 25 Language points Activity 3 An improper habit does a lot of harm to people. For example, staying up late is very bad for people’s health. Clearly, they will feel sleepy and uncomfortable next day. What’s worse, people will become impatient and they may even forget important dates. Sometimes, they will speak nonsense because their minds are not clear. To get rid of the habit, people need to do some sports and sleep early. A healthy body and a clear mind will make them feel good all day. 一个不良的习惯对人们有很大危害。 1. 1) do harm to 动词短语，意为 “对…… 有害”，其中 harm 是 不可数名词, 意为 “危害；伤害”。harm还可作动词，直接接宾语。 e.g. Smoking harms your lungs. 吸烟伤害你的肺。 Reading in the sun does harm to your eyes. 在阳光下看书对你的眼睛有害。拓展: 同义短语：be harmful to 对…… 有害 e.g. An improper habit is harmful to people. = An improper habit ________________ people. 反义词组：do good to/be good for 对…… 有益 2) a lot of = lots of “许多；大量”, 可接可数名词复数或不可数名词。 e.g. She has a lot of friends. 她有很多朋友。 练习：Stop ________ ! It would ________ your health. A. smoking; harm to B. to smoke; does harm C. smoking; do harm to does harm to C 单击此处输入标题文本 26 Language points Activity 3 An improper habit does a lot of harm to people. For example, staying up late is very bad for people’s health. Clearly, they will feel sleepy and uncomfortable next day. What’s worse, people will become impatient and they may even forget important dates. Sometimes, they will speak nonsense because their minds are not clear. To get rid of the habit, people need to do some sports and sleep early. A healthy body and a clear mind will make them feel good all day. 例如，熬夜对人们的健康非常有害。 2. 1) for example “例如; 比如”, 可置于句首, 句中或句末, 常用逗号隔开。 拓展：与 such as 的区别 for example + 句子 强调某个典型例子,用于解释或证明前文观点, 具有独立性。 such as + 名词/动名词 直接列举同类事物中的部分成员, 不强调独立性。 e.g. I like sports. For example, I often play basketball. I like sports such as basketball and running. 2) staying up late 动名词作主语 动名词在句中作主语时，表示 “某个动作或行为”，此时谓语动词通常用单数形式。 e.g. Reading is a good way to learn. 阅读是一种很好的学习方式。 练习：Swimming ________ build a strong body. 游泳有助于强健身体。 Eating too much junk food _____ ______ _____ health. 吃太多的垃圾食品对健康有害。 helps does harm to /is bad for/is harmful to 单击此处输入标题文本 27 Activity 1 Pair work. Read the conversation. Pay attention to need. What’s the matter with you? I stayed up to watch the soccer game last night. I need to get some sleep now. You can watch the games online the next day. You needn’t stay up. You need to take care of yourself. OK. Thank you for your advice. Observing need + to do sth. 需要做某事 need 作实义动词 need + 动词原形 need 作情态动词 need + to do sth. 需要做某事 need 作实义动词 单击此处输入标题文本 28 Language points Activity 1 What’s the matter with you? I stayed up to watch the soccer game last night. I need to get some sleep now. You can watch the games online next day. You needn’t stay up. You need to take care of yourself. OK. Thank you for your advice. = What’s wrong with you? 你怎么了? stay up to do... 熬夜做某事 (后接动词不定式表示熬夜的目的) get some sleep 睡一会儿 take care of 照顾 = look after / care for Thanks/Thank you for + n. /doing sth. 用于表达因某事感谢对方 e.g. Thank you for your help (n.). = Thank you for helping(v.-ing) me. 单击此处输入标题文本 29 grammar need to do / don’t need to do / needn’t do 一、 need 作为实义动词（Main Verb） need 作实义动词时，强调 “主观 / 客观需要”，有人称、 数和时态变化，需接 to do 或名词。 1. 基本结构与含义 形式 结构 含义 肯定句 主语 + need to do sth. 某人需要做某事 否定句 主语 + don’t/doesn’t/didn’t need to do sth. 某人不需要做某事 疑问句 Do/Does/Did + 主语 + need to do sth.? 某人需要做某事吗？ 肯定回答：Yes, 主语+do/does/did. 否定回答：No, 主语+don’t/doesn’t/didn’t. 单击此处输入标题文本 30 grammar need to do / don’t need to do / needn’t do 2. 例句 ·肯定：I need to study for the math test. 我需要为数学考试复习。 ·否定：She doesn’t need to come to the party—she’s busy. 她不需要来派对，她很忙。 ·疑问：Do you need to call your parents before leaving? 你离开前需要给父母打电话吗？ 一、 need 作为实义动词（Main Verb） 3. 拓展 ·接名词：need 后可直接跟名词(无需 to), 表“需要某物”。 e.g. I need a cup of coffee. 我需要一杯咖啡。 ·时态变化：第三人称单数用needs; 过去式用 needed。 单击此处输入标题文本 31 grammar need to do / don’t need to do / needn’t do 二、need 作为情态动词（Modal Verb） need 作情态动词时，强调 “不必 / 建议”，无人称和数的 变化，仅用于否定句和疑问句，接动词原形。 1. 基本结构与含义 形式 结构 含义 否定句 主语 + needn’t do sth. 某人不必做某事（语气委婉） 疑问句 Need + 主语 + do sth.? 某人需要做某事吗？ （正式语境） 肯定回答：Yes, 主语 + must. 否定回答：No, 主语 + needn’t. 单击此处输入标题文本 32 grammar need to do / don’t need to do / needn’t do 二、need 作为情态动词（Modal Verb） 2. 例句 ·否定：You needn’t wait for me—I’ll take a taxi. 你不必等我，我打车走。 ·疑问：—Need I bring my textbook tomorrow? 我明天需要带课本吗？ —Yes, you must. / No, you needn’t. 是的, 你需要。/ 不, 你不需要。 3. 拓展 ·同义替换：needn’t ≈ don’t have to（但 needn’t 更强调 “无需”， don’t/doesn’t have to 强调 “没必要”）。 e.g. You needn’t/don’t have to pay for me—I’ll get it. 你不必为我付钱，我来买单。 单击此处输入标题文本 33 grammar need to do / don’t need to do / needn’t do 三、核心区别对比 实义动词（need to do） 情态动词（needn’t do） 结构 接 to do（如：need to study） 接动词原形 （如：needn’t study） 否定形式 don’t/doesn’t/didn’t need to do needn’t do 疑问形式 —Do/Does/Did... need to do? —Yes, ... do/does/did. —No, ...don’t/doesn’t/didn’t. —Need... do? —Yes, ... must. —No, ...needn’t. 人称变化 有（he needs，she needed） 无（所有人称都用 need） 常用场景 日常交流（主观 / 客观需要） 正式语境（强调 “不必” 或书面语） 单击此处输入标题文本 34 grammar need to do / don’t need to do / needn’t do 四、易混拓展：need doing 结构 实义动词 need 还有特殊用法： need doing = need to be done “某物需要被……”, 主动形式表被动含义。 e.g. The bike needs repairing. (= The bike needs to be repaired. ) 这辆自行车需要修理。 The room needs cleaning—there’s dust everywhere. 房间需要打扫，到处都是灰尘。 单击此处输入标题文本 35 Activity 2 Complete the table and learn how to use need. Need Example need to do We need _________ (get) enough sleep every day. don’t/doesn’t need to do The girl is getting well and she doesn’t need _________ (take) the medicine now. needn’t do Kangkang needn’t _________ (do) the work today. He can hand it in tomorrow. to get to take do get enough sleep 得到充足的睡眠 get well 康复 take (the/some) medicine 吃药 hand in 上交（作业、拾到的失物等）, 提交; 提出（辞职） 单击此处输入标题文本 36 闯关练习 句型转换 1. She needs to finish her homework first. (改为否定句) She _________________ finish her homework first. 2. He needs to take part in the meeting. (改为一般疑问句, 并作肯定回答) _________________ take part in the meeting? Yes, _______ ________. 3. You needn’t hand in the report right now. (改为同义句) You ______ ______ ____ hand in the report right now. 4. They need to buy some fruits for the party. (改为一般疑问句, 并作否定回答) __________________ buy some fruits for the party? No, _______ ________. doesn’t need to Does he need to Do they need to he does don’t have to they don’t 单击此处输入标题文本 37 Activity 3 Read the sentences and circle the correct words. 1. He (need/needs) to take a break now. He looks so tired. 2. We (need/needn’t) to play sports every day to keep healthy. 3. You(needn’t/ don’t need) store so much food in the fridge. 4. You (needn’t/don’t need) to worry about your grades. Just relax. 5. Both Maria and Meimei (need/needn’t) to lose weight. + to do 用实义动词 (需要做某事) + to do 用实义动词 (实义动词不能直接+n’t) + do 动词原形 (store “储存”, 用情态动词,可以直接+n’t) + to do 用实义动词 (实义动词的否定用don’t/doesn’t...) + to do 用实义动词 (needn’t 为情态动词的否定) 单击此处输入标题文本 38 Language points Activity 3 1. He (need/needs) to take a break now. He looks so tired. 2. We (need/needn’t) to play sports every day to keep healthy. 3. You(needn’t/ don’t need) store so much food in the fridge. 4. You (needn’t/don’t need) to worry about your grades. Just relax. 5. Both Maria and Meimei (need/needn’t) to lose weight. ‌take a break 休息一下 (= have a break) 注：have a break‌：通常指短暂休息（如会议中场休息、课间休息）, 时间较短（几分钟到几小时），常见于工作/学习场景。 ‌ ‌ have a rest‌：可指更长时间的休息（如午休、病假休息），甚至 包含恢复体力的含义，常见于非紧急场景。 play sports 做运动 keep healthy/fit 保持健康 worry about 担心 lose weight 减肥 单击此处输入标题文本 39 闯关练习 1. You ____________ (need to / needn’t) finish the report today—it’s due(到期) tomorrow. 2. ______________ (Do you need to / Need you) call the doctor? Your fever is high(你发烧得很厉害). 3. She ______________ (needs to / needn’t) buy milk—there’s still some in the fridge. 4. You _____________ (needn't/don't need) to buy a new one, this works. 5. She ____________ (needs/need) to finish homework first. 6. They _______________ (needn't/don't need) worry about the exam. 7. ________ he ________ (Need/Does...need) to come early? 8. We ______________ (needn't/doesn't need) to wait for him. needn’t Do you need to needn’t don’t need needs needn’t Does need don’t need + do 用情态动词 “不必” Need you 是情态动词疑问式（正式/古旧，现代英语少用） 冰箱有牛奶，不必买 + to do 用实义动词 (this works: 这个能用) + to do 用实义动词 + do 用情态动词 “不必” + to do 用实义动词 + to do 用实义动词 (wait for: 等待) 单击此处输入标题文本 40 Exercises I. 用方框中所给单词的适当形式填空(有一项多余)。 1. It is ____________ to finish this project in one day. 2. She __________ eating vegetables, but she knows they are healthy. 3. After sitting for hours, he felt ______________ and stood up to stretch(伸展). 4. The train ran __________ for 12 hours, so the passengers(乘客) were exhausted(筋疲力尽的). 5. If you __________ your keys often, try putting them in the same place every day. dislike impossible uncomfortable nonstop misplace impossible dislikes uncomfortable nonstop misplace 单击此处输入标题文本 41 Exercises II. 用括号内所给单词的适当形式填空。 1. You need __________ (take) a break after studying for two hours. 2. Tom ________ (need) to drink more water because he has a sore throat. 3. Spicy(辛辣的) food seems to __________ (agree) with my stomach. I always feel sick after eating it. 4. Eating too much fast food(快餐) is ____________ (health) for your body. 5. It's __________ (correct) to believe that junk food has no effect on (对...没有影响) your health. 6. Don't listen to his advice about skipping meals(不吃饭)—it's _________ (sense)! to take needs disagree unhealthy incorrect nonsense 单击此处输入标题文本 42 Exercises III. 完成译句 (每空一词)。 1. 没有良好的习惯，保持健康是不可能的。 It is ___________ to stay healthy ________ good habits. 2. 他因为熬夜而感到不舒服。 He felt ______________ because he ________ ______ late. 3. 你不必今天完成作业，明天交也可以。 You ________ finish the homework today. You can ______ it ______ tomorrow. 4. 她总是放错眼镜，所以买了一条链子挂在脖子上。 She always __________ her glasses, so she bought a chain to wear them around her neck. 5. 我们需要每天锻炼以保持健康。 We ______ _____ _________ every day to ________ __________. impossible without uncomfortable stayed up needn’t hand it misplaces need to exercise keep fit/healthy 单击此处输入标题文本 43 Summary We learn: 1. Key Words: unhealthy, sleepy, lose weight, get rid of ect. 2. Grammar: Prefixes (non-, dis-, un - 等) for opposite meanings; "need to do"/"don't need to do"/"needn't do". We can: talk about healthy habits and give suggestions. 单击此处输入标题文本 44 Homework 1. 基础层：抄写生词(带前缀的词)和核心句型，各造 3 个句子。 2. 提高层：写短文《My Healthy Habits》，运用至少 3 个带 前缀的词和 2 个 need 句型。 3. 拓展层：采访家人的习惯，用英语记录并评价 （如 “Dad smokes. It’s unhealthy. He needs to quit.”）。 单击此处输入标题文本 45 Thank you! 单击此处输入标题文本 46 $