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冀教版七年级下册Unit 7单元语法知识梳理与练习
一：单元语法知识梳理 (Unit 7 Ways to be healthy)
一、祈使句 (Imperatives) 的概念与肯定句式
【规则变化】 祈使句用于表达命令、请求、劝告、警告、禁止等语气。祈使句通常省略主语 you，句子的谓语动词直接用动词原形开头。
肯定祈使句的常见结构：
1. Do 型： 行为动词原形 + 其他成分。
2. Be 型： Be + 表语 (形容词 / 名词) + 其他成分。
【注意】 为了使语气委婉或客气，常在句首或句末加 please。如果 please 放在句末，前面通常要加逗号。
【例句】 Play a game and have fun. 玩个游戏，开心点。
Drink water instead of soft drinks. 喝水，而不是喝软饮料。
Be careful! 小心！
Please warm up before exercising. = Warm up before exercising, please. 运动前请热身。
二、祈使句的否定句式
【规则变化】
无论祈使句是 Do 型还是 Be 型，它的否定形式一律在句首（即动词原形前）加 Don't。
结构：Don't + 动词原形 + 其他成分.
【拓展】 有时为了强调“决不、千万不要”，可以用 Never 代替 Don't，即：Never + 动词原形。
在公共场所的警示语中，还常用 No + 名词/动名词 来表示禁止。如：No smoking! (禁止吸烟)
【易错点】 当遇到 Be 型的祈使句时，否定也是加 Don't，而不能写成 "Be not" 或 "Aren't"。例如：不要迟到，是 Don't be late.
【例句】 Don't eat too quickly. Your stomach may hurt. 不要吃得太快。你的胃会疼的。
Don't spend too much time on your phone. 不要花太多时间在手机上。
Don't be sad or shy. 不要难过或害羞。
三、Let 引导的祈使句
【规则变化】
以 Let 开头的句子也是祈使句，常用来提出建议，意为“让……做某事吧”。
结构：Let + 宾语 (me, us, him, her, them等宾格) + 动词原形 + 其他.
最常见的是 Let's... (让我们……)，它的否定形式通常是 Let's not + 动词原形。
【注意】 对于 Let's... 提出的建议，其肯定的回答常用：Yes, let's. / Good idea. / Sounds good. / OK.
否定的回答常用：No, let's not. / Sorry, I can't. 等。
【例句】 Let's make some small dragon boats by ourselves. 让我们自己做一些小龙舟吧。
Let's not eat junk food. 咱们别吃垃圾食品了。
Let him go. 让他走吧。
二：单元语法知识练习
I. 单项选择（10道）
1. ________ water instead of soft drinks. It's good for your health.
A. Drink
B. Drinks
C. To drink
D. Drinking
2. ________ play on your phone before you sleep.
A. Not
B. No
C. Doesn't
D. Don't
3. Please ________ careful when you practice Tai Chi.
A. are
B. be
C. is
D. do
4. Let's ________ a game and have fun.
A. playing
B. plays
C. play
D. to play
5. ________ sit for a while before exercising. You should warm up first.
A. Don't
B. Not
C. Do
D. Never to
6. We all need a ________ diet. It helps us stay healthy.
A. balance
B. balancing
C. balanced
D. balances
7. It's too late. ________ stay up late. You need enough sleep.
A. Please not
B. Don't
C. Aren't
D. Doesn't
8. Go to bed early and ________ up early. That's a healthy lifestyle.
A. get
B. getting
C. to get
D. gets
9. Eat fruit instead of ________.
A. sweet
B. sweetly
C. sweets
D. sweetener
10. — Let's go for a walk after dinner.
— ________.
A. You are welcome
B. Good idea
C. It doesn't matter
D. Yes, please
II. 语法填空（3篇）
Passage 1
Hello! Do you want to stay healthy Here are some tips for you. First, 11. ________ (have) a balanced diet. You are what you eat! 12. ________ (eat) more vegetables and fruits every day. 13. ________ (not eat) too much junk food, like hamburgers or fries. 14. ________ (drink) water instead 15. ________ (of) soft drinks. Eat fruit instead of 16. ________ (sweet). Also, 17. ________ (not eat) too quickly. Your stomach may 18. ________ (hurt). A healthy diet plays a very important part in our life. Second, 19. ________ (develop) good eating 20. ________ (habit). Please remember these words and you will be healthy.
Passage 2
Exercising is a good way 21. ________ (keep) fit. So, 22. ________ (exercise) more! 23. ________ (not sit) on the sofa for a long time every day. You can 24. ________ (go) for a walk or play a game. But please remember: 25. ________ (warm) up before exercising. It is 26. ________ (safe) for your body. If you feel tired, 27. ________ (stop) to have a rest. 28. ________ (not push) yourself too hard. You can 29. ________ (join) a sports club and have fun 30. ________ (play) with your friends. A healthy body gives you a happy life.
Passage 3
Finally, good sleep is important for good 31. ________ (health). Having 32. ________ (enough) sleep can help you do well in your study. 33. ________ (go) to bed early and get up early. 34. ________ (not stay) up late. Don't play on your phone before you 35. ________ (sleep). That makes it 36. ________ (difficult) for you to fall asleep. 37. ________ (keep) your bedroom quiet and dark. 38. ________ (relax) yourself by 39. ________ (listen) to some soft music before bedtime. 40. ________ (follow) these rules, and you will have a healthy lifestyle!
【参考答案与解析】
I. 单项选择
1.【答案】A
【解析】句意：喝水而不是软饮料。这对你的健康有好处。考查祈使句。这是一个提出建议的祈使句，主语（you）被省略，句首动词必须用原形 Drink。故选 A。
2.【答案】D
【解析】句意：睡觉前不要玩手机。考查祈使句的否定形式。祈使句表示“不要做某事”，直接在动词原形前加 Don't。故选 D。
3.【答案】B
【解析】句意：练习太极时请小心。考查 Be 型祈使句。careful 是形容词，前面需要有系动词，祈使句中必须用原形 be。故选 B。
4.【答案】C
【解析】句意：让我们玩个游戏，开心点。考查 Let 祈使句。Let's 后面接动词原形 play。故选 C。
5.【答案】A
【解析】句意：运动前不要坐着不动。你应该先热身。考查祈使句的否定形式。根据后句“你应该先热身”可知，前句意为“不要坐着”，祈使句否定用 Don't 加动词原形。故选 A。
6.【答案】C
【解析】句意：我们都需要均衡的饮食。它帮助我们保持健康。考查本单元核心词汇。a balanced diet 意为“均衡的饮食”，用过去分词 balanced 作定语修饰 diet。故选 C。
7.【答案】B
【解析】句意：太晚了。不要熬夜。你需要充足的睡眠。考查祈使句的否定形式。stay up late 意为“熬夜”，表劝告“不要做”，用 Don't 加动词原形。故选 B。
8.【答案】A
【解析】句意：早睡早起。那是健康的生活方式。考查并列结构。前面的 Go to bed early 是祈使句，由 and 连接的并列动作也应使用动词原形 get。故选 A。
9.【答案】C
【解析】句意：吃水果，而不是吃甜食。考查词汇。instead of 后面接名词、代词或动名词。此处是指“甜食，糖果”，通常用复数名词 sweets。故选 C。
10.【答案】B
【解析】句意：——晚饭后我们去散步吧。——好主意。考查交际用语。对 Let's... 提建议的肯定答语，最常见的是 Good idea (好主意) 或 Sounds good。故选 B。
II. 语法填空
Passage 1 答案及解析：
11. Have / have。这是提出建议的祈使句，位于句首，首字母大写，用动词原形 Have。
12. Eat / eat。祈使句开头，首字母大写，用动词原形 Eat。
13. Don't eat。祈使句的否定形式，表示“不要吃太多”，填 Don't eat。
14. Drink / drink。祈使句，用动词原形 Drink。
15. of。instead of 意为“代替，而不是”，固定搭配。
16. sweets。instead of 后接名词，指“甜食/糖果”，用复数 sweets。
17. don't eat。祈使句否定式，副词 Also 后接 Don't eat。
18. hurt。情态动词 may 后面接动词原形 hurt。
19. develop / Develop。祈使句，培养良好饮食习惯，用原形 develop。
20. habits。habit 意为“习惯”，这里指各种饮食习惯，填复数 habits。
Passage 2 答案及解析：
21. to keep。a good way to do sth. 意为“做某事的好方法”，用动词不定式。
22. exercise / Exercise。So 引导祈使句，用动词原形 exercise。
23. Don't sit。祈使句的否定，不要坐在沙发上，填 Don't sit。
24. go。情态动词 can 后面接动词原形 go。
25. warm / Warm。祈使句，热身，填动词原形 warm。
26. safer。根据语境，热身对身体“更安全”，用 safe 的比较级 safer。
27. stop。If 条件句的主句用祈使句，用动词原形 stop。
28. Don't push。祈使句否定，不要过度逼迫自己，填 Don't push。
29. join。情态动词 can 后面接动词原形 join。
30. playing。have fun doing sth. 意为“做某事很开心”，填动名词 playing。
Passage 3 答案及解析：
31. health。介词 for 后面接名词 health (健康)。
32. enough。修饰不可数名词 sleep，用形容词 enough (充足的)。
33. Go / go。祈使句，早点上床睡觉，用动词原形 Go。
34. Don't stay。祈使句的否定，不要熬夜，填 Don't stay。
35. sleep。before you 引导状语从句，you 为主语，接动词 sleep。
36. difficult。make it + adj. + for sb. to do 句型，填形容词 difficult。
37. Keep / keep。祈使句，保持卧室安静，用动词原形 Keep。
38. Relax / relax。祈使句，放松自己，用动词原形 Relax。
39. listening。介词 by 后接动名词，表示通过……的方式，填 listening。
40. Follow / follow。“祈使句 + and + 简单句”结构，意为“遵守这些规则，你就会……”，填动词原形 Follow。冀教版七年级下册Unit 7单元语法知识梳理与练习
一：单元语法知识梳理 (Unit 7 Ways to be healthy)
一、祈使句 (Imperatives) 的概念与肯定句式
【规则变化】 祈使句用于表达命令、请求、劝告、警告、禁止等语气。祈使句通常省略主语 you，句子的谓语动词直接用动词原形开头。
肯定祈使句的常见结构：
1. Do 型： 行为动词原形 + 其他成分。
2. Be 型： Be + 表语 (形容词 / 名词) + 其他成分。
【注意】 为了使语气委婉或客气，常在句首或句末加 please。如果 please 放在句末，前面通常要加逗号。
【例句】 Play a game and have fun. 玩个游戏，开心点。
Drink water instead of soft drinks. 喝水，而不是喝软饮料。
Be careful! 小心！
Please warm up before exercising. = Warm up before exercising, please. 运动前请热身。
二、祈使句的否定句式
【规则变化】
无论祈使句是 Do 型还是 Be 型，它的否定形式一律在句首（即动词原形前）加 Don't。
结构：Don't + 动词原形 + 其他成分.
【拓展】 有时为了强调“决不、千万不要”，可以用 Never 代替 Don't，即：Never + 动词原形。
在公共场所的警示语中，还常用 No + 名词/动名词 来表示禁止。如：No smoking! (禁止吸烟)
【易错点】 当遇到 Be 型的祈使句时，否定也是加 Don't，而不能写成 "Be not" 或 "Aren't"。例如：不要迟到，是 Don't be late.
【例句】 Don't eat too quickly. Your stomach may hurt. 不要吃得太快。你的胃会疼的。
Don't spend too much time on your phone. 不要花太多时间在手机上。
Don't be sad or shy. 不要难过或害羞。
三、Let 引导的祈使句
【规则变化】
以 Let 开头的句子也是祈使句，常用来提出建议，意为“让……做某事吧”。
结构：Let + 宾语 (me, us, him, her, them等宾格) + 动词原形 + 其他.
最常见的是 Let's... (让我们……)，它的否定形式通常是 Let's not + 动词原形。
【注意】 对于 Let's... 提出的建议，其肯定的回答常用：Yes, let's. / Good idea. / Sounds good. / OK.
否定的回答常用：No, let's not. / Sorry, I can't. 等。
【例句】 Let's make some small dragon boats by ourselves. 让我们自己做一些小龙舟吧。
Let's not eat junk food. 咱们别吃垃圾食品了。
Let him go. 让他走吧。
二：单元语法知识练习
I. 单项选择（10道）
1. ________ water instead of soft drinks. It's good for your health.
A. Drink
B. Drinks
C. To drink
D. Drinking
2. ________ play on your phone before you sleep.
A. Not
B. No
C. Doesn't
D. Don't
3. Please ________ careful when you practice Tai Chi.
A. are
B. be
C. is
D. do
4. Let's ________ a game and have fun.
A. playing
B. plays
C. play
D. to play
5. ________ sit for a while before exercising. You should warm up first.
A. Don't
B. Not
C. Do
D. Never to
6. We all need a ________ diet. It helps us stay healthy.
A. balance
B. balancing
C. balanced
D. balances
7. It's too late. ________ stay up late. You need enough sleep.
A. Please not
B. Don't
C. Aren't
D. Doesn't
8. Go to bed early and ________ up early. That's a healthy lifestyle.
A. get
B. getting
C. to get
D. gets
9. Eat fruit instead of ________.
A. sweet
B. sweetly
C. sweets
D. sweetener
10. — Let's go for a walk after dinner.
— ________.
A. You are welcome
B. Good idea
C. It doesn't matter
D. Yes, please
II. 语法填空（3篇）
Passage 1
Hello! Do you want to stay healthy Here are some tips for you. First, 11. ________ (have) a balanced diet. You are what you eat! 12. ________ (eat) more vegetables and fruits every day. 13. ________ (not eat) too much junk food, like hamburgers or fries. 14. ________ (drink) water instead 15. ________ (of) soft drinks. Eat fruit instead of 16. ________ (sweet). Also, 17. ________ (not eat) too quickly. Your stomach may 18. ________ (hurt). A healthy diet plays a very important part in our life. Second, 19. ________ (develop) good eating 20. ________ (habit). Please remember these words and you will be healthy.
Passage 2
Exercising is a good way 21. ________ (keep) fit. So, 22. ________ (exercise) more! 23. ________ (not sit) on the sofa for a long time every day. You can 24. ________ (go) for a walk or play a game. But please remember: 25. ________ (warm) up before exercising. It is 26. ________ (safe) for your body. If you feel tired, 27. ________ (stop) to have a rest. 28. ________ (not push) yourself too hard. You can 29. ________ (join) a sports club and have fun 30. ________ (play) with your friends. A healthy body gives you a happy life.
Passage 3
Finally, good sleep is important for good 31. ________ (health). Having 32. ________ (enough) sleep can help you do well in your study. 33. ________ (go) to bed early and get up early. 34. ________ (not stay) up late. Don't play on your phone before you 35. ________ (sleep). That makes it 36. ________ (difficult) for you to fall asleep. 37. ________ (keep) your bedroom quiet and dark. 38. ________ (relax) yourself by 39. ________ (listen) to some soft music before bedtime. 40. ________ (follow) these rules, and you will have a healthy lifestyle!

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