Unit 2语法专题训练 2025-2026学年人教版八年级英语下册

Unit 2 Stay Healthy 一般现在时表健康习惯/不定式to do表目的/健康类词汇 一、核心语法 —— 知识点精讲（学生必背） 1. 一般现在时表健康习惯（核心必考） 用法：表示经常性、习惯性的健康饮食、运动等生活习惯，贴合本单元“保持健康”主题（描述个人健康习惯、健康建议），是本单元最基础且必考的语法点。 标志词：usually, often, always, sometimes, every day, every morning, on weekends, never 结构： 肯定：主语 + 动词原形/动词第三人称单数 + 其他.（主语为三单he/she/it/单数名词，动词用三单；主语为复数/第一、二人称，动词用原形） 否定：主语 + don’t/doesn’t + 动词原形 + 其他.（三单主语用doesn’t，其余用don’t） 疑问：Do/Does + 主语 + 动词原形 + 其他? （回答：Yes, 主语 + do/does. / No, 主语 + don’t/doesn’t.） 核心健康类词汇（必考）： 动词（三单变化重点）：keep（keeps）, eat（eats）, take（takes）, stay（stays）, exercise（exercises）, relax（relaxes） 形容词：healthy（健康的）, harmful（有害的）, sleepy（困倦的）, strong（强壮的）, peaceful（平静的） 例句（贴合单元话题）： ① I often keep a healthy diet to stay fit.（肯定句：我经常保持健康饮食来保持健康。） ② She doesn’t eat junk food because it’s harmful.（否定句：她不吃垃圾食品，因为它是有害的。） ③ —Does he take a hike on weekends? —Yes, he does.（疑问句及回答：他周末去徒步吗？是的，他去。） 2. 不定式to do表目的（重点必考） 用法：表示“做某事的目的”，常用来表达健康建议（做某事是为了保持健康、缓解压力等），贴合本单元“健康建议”场景，是本单元易错重点。 标志词：to（后接动词原形，无人称和时态变化），常位于句子末尾，说明前面动作的目的。 结构： 肯定：主语 + 动词（短语）+ to + 动词原形 + 其他.（目的状语） 否定：主语 + 动词（短语）+ not to + 动词原形 + 其他.（否定目的） 常见搭配（贴合本单元词汇）： 1. keep a healthy diet to stay healthy（保持健康饮食来保持健康） 2. do exercise to get enough energy（做运动来获得足够的能量） 3. take a deep breath to calm down（深呼吸来冷静下来） 4. stay away from junk food not to get ill（远离垃圾食品以免生病） 例句（贴合单元话题）： ① We do yoga every morning to relax our minds.（肯定句：我们每天早上做瑜伽来放松心情。） ② He eats more vegetables not to feel sleepy in the afternoon.（否定句：他多吃蔬菜以免下午感到困倦。） ③ My mother takes a hike on weekends to get close to nature.（肯定句：我妈妈周末去徒步来亲近自然。） 3. 健康相关常用句型（易错重点） 用法：用于询问、描述健康习惯，以及提出健康建议，是本单元口语和书面表达的核心句型，贴合日常交流场景。 常用句型（必考）： 1. —What do you usually do to stay healthy? —I usually keep a healthy diet and do exercise.（询问健康习惯） 2. —Why do you eat so many vegetables? —Because they are good for my health.（询问健康习惯的原因） 3. You should keep a balanced diet to get enough nutrition.（提出健康建议） 4. It’s necessary to do enough exercise to stay strong.（强调健康习惯的重要性） 4. 易错点辨析（贴合本单元语法）  一般现在时三单变化：以s/x/sh/ch/o结尾的动词加es（如relax→relaxes）；以辅音+y结尾，变y为i加es（如study→studies，本单元核心动词无此类变化，重点记忆keep→keeps）  不定式to do表目的与by doing的区别：to do表“目的”（为了做某事），by doing表“方式”（通过做某事），如：I keep healthy by eating fruit.（方式）/ I eat fruit to keep healthy.（目的）  形容词与副词的区别：proper（形容词，适当的）→ properly（副词，适当地），如：We should eat properly.（副词修饰动词eat） 二、核心语法 —— 专项练习题（基础 + 提高） 一、用所给动词的正确形式填空 1. He __________ (keep) a healthy diet every day to stay fit.（三单） 2. We __________ (not eat) junk food because it’s harmful to our health.（否定句） 3. My sister often __________ (take) a hike with her friends on weekends.（三单） 4. —What __________ you __________ (do) to stay healthy? —I do exercise every afternoon.（疑问句） 5. She __________ (relax) her mind by doing yoga every morning.（三单） 6. It’s necessary __________ (eat) enough fruit and vegetables every day.（不定式to do） 7. They __________ (not stay) away from junk food, so they often feel tired.（否定句） 8. —Does your father __________ (exercise) every morning? —Yes, he does.（疑问句） 9. We eat properly __________ (get) enough nutrition.（不定式表目的） 10. He __________ (not do) exercise, so he is not strong enough.（否定句） 二、单项选择 ( ) 1. —What do you usually do to stay healthy? —I usually __________ a healthy diet. A. keep B. keeps C. keeping ( ) 2. She __________ junk food because it’s harmful to her health. A. eat B. doesn’t eat C. don’t eat ( ) 3. We do exercise every afternoon __________ enough energy. A. get B. getting C. to get ( ) 4. —Does he take a deep breath when he is stressed? —No, he __________. A. isn’t B. doesn’t C. don’t ( ) 5. My mother often __________ yoga to relax her mind. A. do B. does C. is doing ( ) 6. It’s important __________ a balanced life between study and relaxation. A. to keep B. keep C. keeping ( ) 7. They __________ away from junk food, so they are healthy. A. stay B. stays C. is staying ( ) 8. —Why do you eat so many vegetables? —Because they __________ good for my health. A. is B. are C. am ( ) 9. He __________ enough sleep every night to stay energetic. A. get B. gets C. is getting ( ) 10. We should eat __________ to keep healthy. A. proper B. properly C. good 三、句型转换 1. I keep a healthy diet every day.（否定句） I __________ __________ a healthy diet every day. 2. She does yoga every morning to relax her mind.（一般疑问句） __________ she __________ yoga every morning to relax her mind? 3. They stay away from junk food to keep healthy.（对划线提问） __________ __________ they stay away from junk food? 4. He eats fruit every day.（改为同义句，用不定式表目的） He eats fruit every day __________ __________ healthy. 5. Does your brother do exercise every afternoon?（肯定回答） Yes, __________ __________. 6. We do exercise every afternoon to get enough energy.（对划线提问） __________ __________ you do every afternoon to get enough energy? 7. She eats junk food.（否定句） She __________ __________ junk food. 8. It’s necessary to keep a healthy diet.（改为同义句） Keeping a healthy diet __________ __________. 四、用 do/does/don’t/doesn’t, 动词原形/动词三单/不定式to do 填空 1. My father __________ (exercise) every morning. He is very strong. 2. We __________ (not keep) a healthy diet, so we often feel sleepy. 3. —__________ you __________ (take) a hike on weekends? —Yes, I do. 4. She eats more vegetables __________ (stay) healthy. 5. It’s important __________ (do) enough exercise every day. 6. He __________ (not eat) junk food. He knows it’s harmful. 7. They __________ (keep) a balanced diet to get enough nutrition. 8. —__________ your sister __________ (relax) her mind by listening to music? —No, she doesn’t. 9. I do yoga every morning __________ (calm) down. 10. He __________ (stay) away from junk food, so he is healthy. 参考答案 一、用所给词的适当形式填空 1. keeps 2. don’t eat 3. takes 4. do; do 5. relaxes 6. to eat 7. don’t stay 8. exercise 9. to get 10. doesn’t do 二、单项选择 1.A 2.B 3.C 4.B 5.B 6.A 7.A 8.B 9.B 10.B 三、句型转换 1. don’t keep 2. Does; do 3. Why do 4. to keep 5. he does 6. What do 7. doesn’t eat 8. is necessary 四、用 do/does/don’t/doesn’t, 动词原形/动词三单/不定式to do 填空 1. exercises 2. don’t keep 3. Do; take 4. to stay 5. to do 6. doesn’t eat 7. keep 8. Does; relax 9. to calm 10. stays 学科网（北京）股份有限公司 $