Unit 3 Sound Body, Sound Mind 否定前缀构词法 & need 的用法（核心语法精练）英语新教材仁爱科普版八年级上册

**基本信息** 聚焦否定前缀构词法与need用法，通过对比表、思维导图系统梳理语法规则，结合梯度化题型实现从概念辨析到综合应用的能力提升。 **专项设计** |模块|题量/典例|方法提炼|知识逻辑| |----|-----------|----------|----------| |方法总结|2个核心方法模块（对比表+思维导图）|need作实义/情态动词的结构对比、否定前缀（un-/in-/dis-/mis-）规律分类|先明确语法概念（need用法区分、前缀规则），再构建应用框架| |基础应用|4类基础题型（填空/选择/完成句子/句型转换）|前缀构词逆向推导、need否定形式辨析技巧|从单一语法点应用（词形变化、句式转换）过渡到语境化表达| |综合应用|2类综合题型（语法选择/短文填空）|语篇中语法知识的动态匹配方法|以"健康生活"主题为载体，实现语法知识与语言能力的融合迁移|

Unit 3 Sound Body, Sound Mind 核心语法精练 （否定前缀构词法 & need 的用法） 目录 Unit 3 Sound Body, Sound Mind 核心语法精练 1 （否定前缀构词法 & need 的用法） 1 目录 1 1. 情态动词need的用法结构对比表 1 2. 否定前缀构词法（思维导图） 2 一、用所给单词的适当形式填空。 3 二、单项选择。 4 三、完成句子。 5 四、句型转换。 7 一、语法选择 8 二、短文填空 11 1. 情态动词need的用法结构对比表 结构形式 肯定句 否定句 一般疑问句 主要用法 need to do（实义动词） We need to get enough sleep every day. We don't need to get up early on weekends. Do you need to take the medicine? 表示“需要做某事”， 有人称和数的变化， 否定/疑问借助助动词do/does needn't do（情态动词） — You needn't worry about your health. Need I go to the hospital? 表示“不必做某事”， 没有人称和数的变化， 后接动词原形，否定为needn't 用法辨析： 表达方式 含义 语气 need to do 有必要/需要做某事 肯定性较强 don't need to do 不需要做某事（实义动词否定） 客观不需要 needn't do 不必做某事（情态动词否定） 主观上没必要 特别提示： 作实义动词时：need + to do，有人称和数的变化（he needs / they need） 作情态动词时：need + 动词原形，多用于否定句和疑问句 回答“Need I...?”时，肯定回答用 must，否定回答用 needn't 2. 否定前缀构词法（思维导图） 规律小结： un- 最为常用，多数形容词加un-即可构成反义词 in- 和 im- 主要用于以特定字母开头的单词，需单独记忆 dis- 多用于动词，表示“不做/相反的动作” mis- 表示“错误地”，常构成新的动词 一、用所给单词的适当形式填空。 1. It is very ___________ (health) to eat too much junk food. You should stay away from it. 【答案】unhealthy 【解析】health 加否定前缀 un- 变为 unhealthy，表示“不健康的”。 2. I ___________ (agree) with you. I think your idea is not right at all. 【答案】disagree 【解析】agree 加否定前缀 dis- 变为 disagree，表示“不同意”。 3. To stay fit, we ___________ (need) do exercise for at least 30 minutes every day. 【答案】need to 【解析】need to do 表示“需要做某事”，主语 we 为复数，need 用原形。 4. You have finished all your homework. You ___________ (not need) stay up late tonight. 【答案】needn't / don't need to 【解析】need 作情态动词用 needn't + 动词原形；作实义动词用 don't need to + 动词原形。 5. It is ___________ (possible) to pass the exam without studying hard. 【答案】impossible 【解析】possible 加否定前缀 im- 变为 impossible，表示“不可能的”（p 前用 im-）。 6. She always ___________ (place) her keys and then spends hours looking for them. 【答案】misplaces 【解析】mis- 表示“误/错”，misplace 表示“放错地方”。主语 she 为第三人称单数，用 misplaces。 7. The doctor says the patient is ___________ (patient). He needs to wait in line like everyone else. 【答案】impatient 【解析】patient 加否定前缀 im- 变为 impatient，表示“不耐烦的”（p 前用 im-）。 8. If you sit in the same position for too long, you will feel ___________ (comfortable). 【答案】uncomfortable 【解析】comfortable 加否定前缀 un- 变为 uncomfortable，表示“不舒服的”。 9. The letter was written ___________ (correct). There are too many spelling mistakes in it. 【答案】incorrectly 【解析】correct 加否定前缀 in- 变为 incorrect，此处修饰动词 written，用副词 incorrectly。 10. He became a ___________ (smoke) last year. Now he feels much better and healthier. 【答案】non-smoker 【解析】smoker 加否定前缀 non- 变为 non-smoker，表示“不吸烟者”，常加连字符。 二、单项选择。 (  )1. Eating too much sugar is bad for your teeth. It is ___________ for your health. A. healthy   B. unhealthy   C. health   D. unhealth 【答案】B 【解析】unhealthy 由 healthy 加否定前缀 un- 构成形容词，表示“不健康的”，在 is 后作表语。 (  )2. — I have a headache. What should I do? — You ___________ see a doctor right away. A. needn't   B. don't need   C. need to   D. need not to 【答案】C 【解析】need to do 表示“需要做某事”，主语 you 为第二人称，need 用原形。 (  )3. The teacher ___________ with Xiaoming. She thinks he should study harder. A. agrees   B. disagrees   C. dislikes   D. likes 【答案】B 【解析】disagree 由 agree 加否定前缀 dis- 构成，表示“不同意”。 (  )4. You ___________ worry about the test. You have prepared very well. A. need   B. need to   C. needn't   D. needs 【答案】C 【解析】needn't 为情态动词用法，表示“不必”，后接动词原形 worry。 (  )5. It is ___________ to keep playing computer games all day without rest. A. proper   B. improper   C. possible   D. impossible 【答案】B 【解析】improper 由 proper 加否定前缀 im- 构成，表示“不适当的”。 (  )6. I ___________ my notebook somewhere. I can't find it anywhere. A. understood   B. misunderstood   C. misplaced   D. placed 【答案】C 【解析】misplace 由 mis- + place 构成，表示“放错地方”，符合“找不到”的语境。 (  )7. — Do I need to take all these pills? — No, you ___________. Just take one after each meal. A. needn't   B. don't need   C. need not to   D. not need 【答案】A 【解析】问句用 need to do，否定回答可用 needn't + 动词原形，或用 don't need to。此处只有 needn't 符合选项。 (  )8. The weather is hot and the room is crowded. I feel very ___________ here. A. comfortable   B. uncomfortable   C. comfortably   D. uncomfortably 【答案】B 【解析】uncomfortable 由 comfortable 加否定前缀 un- 构成形容词，feel 后接形容词作表语。 (  )9. He has decided to be a ___________ and give up smoking for his family. A. non-smoker   B. smoker   C. non-smoke   D. smoking 【答案】A 【解析】non-smoker 由 non- + smoker 构成，表示“不吸烟者”，常作连字符。 (  ) 10. Staying up late every night is ___________. You should go to bed early. A. healthy   B. unhealthy   C. healthily   D. unhealthily 【答案】B 【解析】unhealthy 由 healthy 加否定前缀 un- 构成形容词，在 is 后作表语。 三、完成句子。 1. 为了保持健康，我们需要每天锻炼。 ___________ ___________ ___________ keep healthy, we need to do exercise every day. 【答案】In order to 【解析】in order to 表示“为了”，后接动词原形，句首首字母大写。 2. 垃圾食品对我们的健康有害。 Junk food is ___________ ___________ our health. 【答案】bad for 【解析】be bad for 表示“对……有害”。 3. 你需要远离手机游戏，多参加体育活动。 You ___________ ___________ ___________ ___________ phone games and take an active part in sports. 【答案】need to stay away from 【解析】need to do 表示“需要做某事”；stay away from 表示“远离”。 4. 他发烧了，需要卧床休息并服药。 He has a fever and ___________ ___________ ___________ in bed and ___________ ___________ ___________. 【答案】needs to rest; take some pills 【解析】need to do 表示“需要做”，主语 he 为第三人称单数用 needs；take some pills 表示“服药”。 5. 你不必为了看起来苗条而减肥。 You ___________ ___________ weight just to look slim. 【答案】needn't lose 【解析】needn't do 表示“不必做”；lose weight 表示“减肥”。 6. 久坐不动会让你感到不舒服。 Sitting for too long will make you feel ___________. 【答案】uncomfortable 【解析】uncomfortable 由 comfortable 加否定前缀 un- 构成，feel 后接形容词。 7. 一方面，运动有助于强身健体；另一方面，它能让我们放松心情。 ___________ ___________ ___________, exercise helps build a strong body. ___________ ___________ ___________, it helps us relax our minds. 【答案】For one thing; For another 【解析】for one thing... for another... 表示“一方面……另一方面……”。 8. 保持心情愉快对学习和工作都有好处。 ___________ ___________ ___________ ___________ is good for both study and work. 【答案】Being in a good mood 【解析】be in a good mood 表示“心情愉快”，此处作主语用动名词 being。 9. 你本不必吃那么多垃圾食品。 You ___________ ___________ so much junk food. 【答案】needn't eat 【解析】needn't + 动词原形表示“不必做”（已做但没必要）。 10. 每天确保获得充足的睡眠很重要。 It is important to ___________ ___________ ___________ ___________ enough sleep every day. 【答案】make sure to get 【解析】make sure to do sth. 表示“确保做某事”；get enough sleep 表示“获得充足睡眠”。 四、句型转换。 1. You must finish your homework before dinner.（改为同义句，用 need） You ___________ ___________ ___________ your homework before dinner. 【答案】need to finish 【解析】must = need to do，表示“必须/需要做”。 2. It is necessary for us to drink enough water every day.（改为同义句，用 need） We ___________ ___________ ___________ enough water every day. 【答案】need to drink 【解析】It is necessary for sb. to do = sb. need to do。 3. Eating too much junk food is not healthy.（改为同义句，用前缀） Eating too much junk food is ___________. 【答案】unhealthy 【解析】not healthy = unhealthy，加否定前缀 un-。 4. You do not have to worry about your grades.（改为同义句，用 need） You ___________ ___________ about your grades. 【答案】needn't worry 【解析】do not have to = needn't，表示“不必”。 5. It is not correct to eat hamburgers every day.（改为同义句，用前缀） It is ___________ to eat hamburgers every day. 【答案】incorrect 【解析】not correct = incorrect，加否定前缀 in-。 6. She does not like swimming because it is tiring.（改为同义句，用前缀） She ___________ swimming because it is tiring. 【答案】dislikes 【解析】does not like = dislike，加否定前缀 dis-。 7. You need to see a doctor because you have a bad cough.（对画线部分提问） ___________ ___________ you ___________ ___________ see a doctor? 【答案】Why do; need to 【解析】对原因提问用 why，need 为实义动词，借助助动词 do。 8. The boy is too young to play football.（改为同义句，用 so...that...） The boy is ___________ ___________ ___________ he ___________ play football. 【答案】so young that; can't 【解析】too...to... = so...that + 否定从句。 9. We need to take good care of ourselves.（改为否定句） We ___________ ___________ ___________ take good care of ourselves. 【答案】don't need to 【解析】need 作实义动词，否定用 do not need to。 10. He always puts his things in the wrong place.（改为同义句，用前缀） He always ___________ his things. 【答案】misplaces 【解析】puts in the wrong place = misplace，加否定前缀 mis-，主语 he 为三单加 -es。 一、语法选择 A 阅读下面短文，从 A、B、C 三个选项中选出一个语法正确的答案。 （改编自广东省中考模拟题）Do you know how to keep healthy? Here are some tips for you. First, you (1) ________ to eat a balanced diet. You should eat more fruit and vegetables. They are (2) ________ for your health. You (3) ________ eat too much junk food. It is (4) ________. Second, you need to do exercise every day. You (5) ________ to spend hours in the gym. Even 30 minutes of walking can make a difference. But you (6) ________ warm up before doing sports. It is very important. Third, you should get enough sleep. You (7) ________ to stay up late. It will make you feel (8) ________ the next day. Finally, try to stay positive. (9) ________ you meet difficulties, you (10) ________ give up. Just keep going and you will succeed. (  ) 1. A. need   B. needs   C. needed (  )2. A. good   B. well   C. better (  )3. A. needn't   B. don't need   C. mustn't (  )4. A. health   B. healthy   C. unhealthy (  )5. A. needn't   B. don't need   C. need (  )6. A. need   B. needs   C. needn't (  )7. A. needn't   B. don't need   C. mustn't (  )8. A. sleep   B. sleepy   C. asleep (  )9. A. Although   B. Because   C. So (  )10. A. needn't   B. don't need   C. mustn't 【答案】 1.A 2. A 3. C 4. C 5. B 6. A 7. A 8. B 9. A 10. A 【文章大意】 本文介绍了保持健康的几条建议：均衡饮食、每天运动、充足睡眠和保持积极心态。文章强调了健康饮食和适量运动的重要性，并鼓励读者遇到困难不放弃。 【解析】 1.A。need作实义动词，主语You为第二人称，用原形need。 2.A。be good for为固定短语，意为“对……有好处”。 3.C。句意“你不应该吃太多垃圾食品”，用mustn't表示“禁止”。 4.C。is后接形容词作表语，“不健康的”用unhealthy。 5.B。“你不需要在健身房花几个小时”，用don't need to。 6.A。“但你需要热身”，用need to do，主语You用原形need。 7.A。“你不必熬夜”，用needn't。 8.B。feel后接形容词sleepy，表示“困倦的”。 9.A。“尽管你遇到困难”，用Although引导让步状语从句。 10.A。“不必放弃”，用needn't give up。 B 阅读下面短文，从 A、B、C 三个选项中选出一个语法正确的答案。 （改编自北京市海淀区期末试题）My name is Li Wei. I am an 8th grader. Last month, I had an (1) ________ experience. I ate too much junk food and felt very (2) ________. I had a stomachache and a fever. My mother took me to the hospital. The doctor examined me carefully. He said, “You (3) ________ to change your eating habits. You (4) ________ eat so much fried food. It is (5) ________ for your stomach.” I asked the doctor, “(6) ________ I take some medicine?” He said, “Yes, you must. You need to take these pills three times a day. And you (7) ________ to drink more water.” Now I have changed my habits. I eat more fruit and vegetables. I (8) ________ junk food now because I know it is bad for me. I also do exercise every day. I feel much better. My friend Xiao Ming also had the same problem. He often ate candies and cookies. He didn't think it was a big deal. But now he (9) ________ his bad habits. He runs every morning. He says, “We (10) ________ to take good care of our health.” (  )1. A. comfortable   B. uncomfortable   C. comfortably (  )2. A. well   B. good   C. sick (  )3. A. need   B. needs   C. needed (  )4. A. needn't   B. don't need   C. mustn't (  )5. A. harmful   B. harmless   C. helpful (  )6. A. Need   B. Must   C. Do (  )7. A. need   B. needs   C. needn't (  )8. A. like   B. dislike   C. liked (  )9. A. gets rid of   B. get rid of   C. got rid of (  )10. A. need   B. needs   C. needed 【答案】 1.B 2. C 3. A 4. C 5. A 6. A 7. A 8. B 9. A 10. A 【文章大意】 本文讲述了李伟因吃太多垃圾食品导致胃痛发烧的经历。医生建议他改变饮食习惯，多喝水。现在他已经改掉了坏习惯，多吃蔬果，每天运动。他的朋友小明也有同样的问题，现在也开始跑步了。 【解析】 1.B。“一次不舒服的经历”，用uncomfortable修饰experience。 2.C。感到“生病了”，用sick。 3.A。need作实义动词，主语You用原形need。 4.C。“不应该吃”用mustn't。 5.A。“对胃有害”用harmful。 6.A。need作情态动词，构成一般疑问句Need I...? 7.A。“需要多喝水”用need to do，主语You用need。 8.B。“不喜欢垃圾食品”用dislike，一般现在时。 9.A。“改掉坏习惯”用get rid of，主语He为三单，加-s。 10.A。need作实义动词，主语We用原形need。 二、短文填空 A 阅读下面短文，在空白处填入 1 个适当的单词或括号内单词的正确形式。 How can we live a healthy life? Here are some tips. First, we need to have good eating habits. We should eat more fruit and vegetables. They are (1) ________ (health) food. We (2) ________ (need) eat too much sugar or salt. Too much sugar is (3) ________ (good) for our teeth. Second, we need to do exercise. We (4) ________ (need) to spend hours in the gym every day. Even a 30-minute walk can help. But we (5) ________ (need) warm up before exercise. It can keep us safe. Third, we need enough sleep. We (6) ________ (need) to stay up late. It makes us feel (7) ________ (sleep) and tired. Fourth, we should stay positive. (8) ________ we have bad feelings, we can talk to our parents or friends. We (9) ________ (need) face everything alone. Remember, a healthy lifestyle is very important. We all (10) ________ (need) to take good care of ourselves. 【答案】 1.healthy 2. needn't / don't need to 3. bad / harmful 4. don't need 5. need to 6. needn't / don't need to 7. sleepy 8. If / When 9. needn't / don't need to 10. need 【解析】 1.修饰名词food用形容词healthy。 2.“不需要吃太多”用needn't eat或don't need to eat。 3.“对牙齿不好”用bad或harmful。 4.“不需要花几个小时”用don't need to。 5.“需要热身”用need to do。 6.“不必熬夜”用needn't stay up或don't need to stay up。 7.feel后接形容词sleepy，表示“困倦的”。 8.“如果有/当有不好的情绪时”用If或When引导状语从句。 9.“不必独自面对”用needn't face或don't need to face。 10.主语We为复数，need用原形。 B 阅读下面短文，在空白处填入 1 个适当的单词或括号内单词的正确形式。 （改编自南京市鼓楼区期末）Last week, I felt very (1) ________ (comfortable) after eating too much fried chicken. I had a stomachache and a fever. My mother took me to the hospital. The doctor examined me and said, “You ate too much junk food. It is (2) ________ (healthy). You (3) ________ (need) eat so much fried food. It is bad for your stomach. You (4) ________ (need) to take some pills and drink more water. And you (5) ________ (need) to stay in bed for two days.” I followed the doctor's advice. Now I feel much better. I (6) ________ (like) junk food because it is bad for my health. I eat more fruit and vegetables. My mother says I am (7) ________ (health) than before. My friend Li Ming also had (8) ________ similar problem. He often ate candies and cookies. He didn't care about his health. But now he (9) ________ (get) rid of his bad habits. He runs every morning and eats well. We both know that we (10) ________ (need) to keep a healthy lifestyle. 【答案】 1.uncomfortable 2. unhealthy 3. needn't / don't need to 4. need 5. need 6. dislike 7. healthier 8. a 9. gets 10. need 【解析】 1.comfortable加否定前缀un-变为uncomfortable，表示“不舒服的”。 2.healthy加否定前缀un-变为unhealthy，表示“不健康的”。 3.“不需要/不应该吃”用needn't eat或don't need to eat。 4.“需要服药”用need to do，主语you用need。 5.“需要卧床”用need to do，主语you用need。 6.“不喜欢”用dislike，一般现在时。 7.than前用比较级，healthy变healthier。 8.泛指“类似的问题”，用不定冠词a。 9.“改掉坏习惯”用get rid of，主语He为三单，加-s。 10.主语We为复数，need用原形。 1 / 12 学科网（北京）股份有限公司 $ Unit 3 Sound Body, Sound Mind 核心语法精练 （否定前缀构词法 & need 的用法） 目录 Unit 3 Sound Body, Sound Mind 核心语法精练 1 （否定前缀构词法 & need 的用法） 1 目录 1 1. 情态动词need的用法结构对比表 1 2. 否定前缀构词法（思维导图） 2 一、用所给单词的适当形式填空。 3 二、单项选择。 4 三、完成句子。 5 四、句型转换。 7 一、语法选择 8 二、短文填空 11 1. 情态动词need的用法结构对比表 结构形式 肯定句 否定句 一般疑问句 主要用法 need to do（实义动词） We need to get enough sleep every day. We don't need to get up early on weekends. Do you need to take the medicine? 表示“需要做某事”， 有人称和数的变化， 否定/疑问借助助动词do/does needn't do（情态动词） — You needn't worry about your health. Need I go to the hospital? 表示“不必做某事”， 没有人称和数的变化， 后接动词原形，否定为needn't 用法辨析： 表达方式 含义 语气 need to do 有必要/需要做某事 肯定性较强 don't need to do 不需要做某事（实义动词否定） 客观不需要 needn't do 不必做某事（情态动词否定） 主观上没必要 特别提示： 作实义动词时：need + to do，有人称和数的变化（he needs / they need） 作情态动词时：need + 动词原形，多用于否定句和疑问句 回答“Need I...?”时，肯定回答用 must，否定回答用 needn't 2. 否定前缀构词法（思维导图） 规律小结： un- 最为常用，多数形容词加un-即可构成反义词 in- 和 im- 主要用于以特定字母开头的单词，需单独记忆 dis- 多用于动词，表示“不做/相反的动作” mis- 表示“错误地”，常构成新的动词 一、用所给单词的适当形式填空。 1. It is very ___________ (health) to eat too much junk food. You should stay away from it. 2. I ___________ (agree) with you. I think your idea is not right at all. 3. To stay fit, we ___________ (need) do exercise for at least 30 minutes every day. 4. You have finished all your homework. You ___________ (not need) stay up late tonight. 5. It is ___________ (possible) to pass the exam without studying hard. 6. She always ___________ (place) her keys and then spends hours looking for them. 7. The doctor says the patient is ___________ (patient). He needs to wait in line like everyone else. 8. If you sit in the same position for too long, you will feel ___________ (comfortable). 9. The letter was written ___________ (correct). There are too many spelling mistakes in it. 10. He became a ___________ (smoke) last year. Now he feels much better and healthier. 二、单项选择。 (  )1. Eating too much sugar is bad for your teeth. It is ___________ for your health. A. healthy   B. unhealthy   C. health   D. unhealth (  )2. — I have a headache. What should I do? — You ___________ see a doctor right away. A. needn't   B. don't need   C. need to   D. need not to (  )3. The teacher ___________ with Xiaoming. She thinks he should study harder. A. agrees   B. disagrees   C. dislikes   D. likes (  )4. You ___________ worry about the test. You have prepared very well. A. need   B. need to   C. needn't   D. needs (  )5. It is ___________ to keep playing computer games all day without rest. A. proper   B. improper   C. possible   D. impossible (  )6. I ___________ my notebook somewhere. I can't find it anywhere. A. understood   B. misunderstood   C. misplaced   D. placed (  )7. — Do I need to take all these pills? — No, you ___________. Just take one after each meal. A. needn't   B. don't need   C. need not to   D. not need (  )8. The weather is hot and the room is crowded. I feel very ___________ here. A. comfortable   B. uncomfortable   C. comfortably   D. uncomfortably (  )9. He has decided to be a ___________ and give up smoking for his family. A. non-smoker   B. smoker   C. non-smoke   D. smoking (  ) 10. Staying up late every night is ___________. You should go to bed early. A. healthy   B. unhealthy   C. healthily   D. unhealthily 三、完成句子。 1. 为了保持健康，我们需要每天锻炼。 ___________ ___________ ___________ keep healthy, we need to do exercise every day. 2. 垃圾食品对我们的健康有害。 Junk food is ___________ ___________ our health. 3. 你需要远离手机游戏，多参加体育活动。 You ___________ ___________ ___________ ___________ phone games and take an active part in sports. 4. 他发烧了，需要卧床休息并服药。 He has a fever and ___________ ___________ ___________ in bed and ___________ ___________ ___________. 5. 你不必为了看起来苗条而减肥。 You ___________ ___________ weight just to look slim. 6. 久坐不动会让你感到不舒服。 Sitting for too long will make you feel ___________. 7. 一方面，运动有助于强身健体；另一方面，它能让我们放松心情。 ___________ ___________ ___________, exercise helps build a strong body. ___________ ___________ ___________, it helps us relax our minds. 8. 保持心情愉快对学习和工作都有好处。 ___________ ___________ ___________ ___________ is good for both study and work. 9. 你本不必吃那么多垃圾食品。 You ___________ ___________ so much junk food. 10. 每天确保获得充足的睡眠很重要。 It is important to ___________ ___________ ___________ ___________ enough sleep every day. 四、句型转换。 1. You must finish your homework before dinner.（改为同义句，用 need） You ___________ ___________ ___________ your homework before dinner. 2. It is necessary for us to drink enough water every day.（改为同义句，用 need） We ___________ ___________ ___________ enough water every day. 3. Eating too much junk food is not healthy.（改为同义句，用前缀） Eating too much junk food is ___________. 4. You do not have to worry about your grades.（改为同义句，用 need） You ___________ ___________ about your grades. 5. It is not correct to eat hamburgers every day.（改为同义句，用前缀） It is ___________ to eat hamburgers every day. 6. She does not like swimming because it is tiring.（改为同义句，用前缀） She ___________ swimming because it is tiring. 7. You need to see a doctor because you have a bad cough.（对画线部分提问） ___________ ___________ you ___________ ___________ see a doctor? 8. The boy is too young to play football.（改为同义句，用 so...that...） The boy is ___________ ___________ ___________ he ___________ play football. 9. We need to take good care of ourselves.（改为否定句） We ___________ ___________ ___________ take good care of ourselves. 10. He always puts his things in the wrong place.（改为同义句，用前缀） He always ___________ his things. 一、语法选择 A 阅读下面短文，从 A、B、C 三个选项中选出一个语法正确的答案。 （改编自广东省中考模拟题）Do you know how to keep healthy? Here are some tips for you. First, you (1) ________ to eat a balanced diet. You should eat more fruit and vegetables. They are (2) ________ for your health. You (3) ________ eat too much junk food. It is (4) ________. Second, you need to do exercise every day. You (5) ________ to spend hours in the gym. Even 30 minutes of walking can make a difference. But you (6) ________ warm up before doing sports. It is very important. Third, you should get enough sleep. You (7) ________ to stay up late. It will make you feel (8) ________ the next day. Finally, try to stay positive. (9) ________ you meet difficulties, you (10) ________ give up. Just keep going and you will succeed. (  ) 1. A. need   B. needs   C. needed (  )2. A. good   B. well   C. better (  )3. A. needn't   B. don't need   C. mustn't (  )4. A. health   B. healthy   C. unhealthy (  )5. A. needn't   B. don't need   C. need (  )6. A. need   B. needs   C. needn't (  )7. A. needn't   B. don't need   C. mustn't (  )8. A. sleep   B. sleepy   C. asleep (  )9. A. Although   B. Because   C. So (  )10. A. needn't   B. don't need   C. mustn't B 阅读下面短文，从 A、B、C 三个选项中选出一个语法正确的答案。 （改编自北京市海淀区期末试题）My name is Li Wei. I am an 8th grader. Last month, I had an (1) ________ experience. I ate too much junk food and felt very (2) ________. I had a stomachache and a fever. My mother took me to the hospital. The doctor examined me carefully. He said, “You (3) ________ to change your eating habits. You (4) ________ eat so much fried food. It is (5) ________ for your stomach.” I asked the doctor, “(6) ________ I take some medicine?” He said, “Yes, you must. You need to take these pills three times a day. And you (7) ________ to drink more water.” Now I have changed my habits. I eat more fruit and vegetables. I (8) ________ junk food now because I know it is bad for me. I also do exercise every day. I feel much better. My friend Xiao Ming also had the same problem. He often ate candies and cookies. He didn't think it was a big deal. But now he (9) ________ his bad habits. He runs every morning. He says, “We (10) ________ to take good care of our health.” (  )1. A. comfortable   B. uncomfortable   C. comfortably (  )2. A. well   B. good   C. sick (  )3. A. need   B. needs   C. needed (  )4. A. needn't   B. don't need   C. mustn't (  )5. A. harmful   B. harmless   C. helpful (  )6. A. Need   B. Must   C. Do (  )7. A. need   B. needs   C. needn't (  )8. A. like   B. dislike   C. liked (  )9. A. gets rid of   B. get rid of   C. got rid of (  )10. A. need   B. needs   C. needed 二、短文填空 A 阅读下面短文，在空白处填入 1 个适当的单词或括号内单词的正确形式。 How can we live a healthy life? Here are some tips. First, we need to have good eating habits. We should eat more fruit and vegetables. They are (1) ________ (health) food. We (2) ________ (need) eat too much sugar or salt. Too much sugar is (3) ________ (good) for our teeth. Second, we need to do exercise. We (4) ________ (need) to spend hours in the gym every day. Even a 30-minute walk can help. But we (5) ________ (need) warm up before exercise. It can keep us safe. Third, we need enough sleep. We (6) ________ (need) to stay up late. It makes us feel (7) ________ (sleep) and tired. Fourth, we should stay positive. (8) ________ we have bad feelings, we can talk to our parents or friends. We (9) ________ (need) face everything alone. Remember, a healthy lifestyle is very important. We all (10) ________ (need) to take good care of ourselves. B 阅读下面短文，在空白处填入 1 个适当的单词或括号内单词的正确形式。 （改编自南京市鼓楼区期末）Last week, I felt very (1) ________ (comfortable) after eating too much fried chicken. I had a stomachache and a fever. My mother took me to the hospital. The doctor examined me and said, “You ate too much junk food. It is (2) ________ (healthy). You (3) ________ (need) eat so much fried food. It is bad for your stomach. You (4) ________ (need) to take some pills and drink more water. And you (5) ________ (need) to stay in bed for two days.” I followed the doctor's advice. Now I feel much better. I (6) ________ (like) junk food because it is bad for my health. I eat more fruit and vegetables. My mother says I am (7) ________ (health) than before. My friend Li Ming also had (8) ________ similar problem. He often ate candies and cookies. He didn't care about his health. But now he (9) ________ (get) rid of his bad habits. He runs every morning and eats well. We both know that we (10) ________ (need) to keep a healthy lifestyle. 1 / 12 学科网（北京）股份有限公司 $