Unit 3 Keep Fit 易错专题专练2025-2026学年外研版英语七年级下册
2024年新教材七年级下册英语人教版 Unit 3 Keep Fit 易错专题专练+解析
本单元主题是"健康生活与运动"，学生需要掌握有关运动项目、健身频率、身体状况的词汇，熟练运用 how often 引导的特殊疑问句询问频率，区分 可数名词与不可数名词，并正确使用建议句型。单元常见词汇包括 skateboarding, rope skipping, exercise, treadmill, app, health 等；核心句型包括 How often do you exercise? How many times a week? I seldom play basketball. 等。
本资料重点训练以下易错内容：
• how often 与 how long 的辨析
• how many times 与频率副词（once, twice, seldom, usually）的区分
• 可数名词与不可数名词（exercise, milk, apple, vegetable）的用法
• 情态动词 should / shouldn't 提建议
• 句型转换中的对划线部分提问
易错点一：how often 与 how long / how soon 的辨析
学生常混淆询问"频率"、"时长"和"多久之后"的句型。
• How often: 多久一次（问频率）→ 回答：Once a week, Twice a month, Often.
• How long: 多长时间（问时长）→ 回答：For two hours, Since last year.
• How soon: 多久之后（用于将来时）→ 回答：In two days.
易错题1
— ______ do you play badminton?
— Once a week.
A. How long B. How often C. How soon D. How far
易错题2
— ______ do you usually sleep every night?
— For about eight hours.
A. How often B. How long C. How many D. How much
易错点二：how many times 与频率副词
学生容易混淆"次数"和"频率"。
• How many times: 多少次（问具体的次数）→ 回答：Once, Twice, Three times.
• How often: 多经常（问频率密度）→ 回答：Every day, Seldom, Never.
易错题3
— ______ do you go to the park?
— Twice a week.
A. How many times B. How often C. How long D. How much
易错题4
— ______ do you watch TV every day?
— Once. I only watch the news.
A. How often B. How long C. How many times D. When
易错点三：exercise 的可数与不可数
• exercise 作"锻炼"讲时，是不可数名词（do exercise √, do exercises √ 但意思不同）。
• exercise 作"体操"或"练习"讲时，是可数名词复数（morning exercises, math exercises）。
学生常错误地在不可数含义后加s。
易错题5
Doing enough ______ is good for our health.
A. exercise B. exercises C. exercising D. an exercise
易错题6
We should do eye ______ every day to protect our eyes.
A. exercise B. exercises C. exercising D. an exercise
易错点四：should / shouldn't 提建议
should 是情态动词，后接动词原形，否定形式是 shouldn't。学生常错误地在should后加to，或把shouldn't写成don't should。
易错题7
You ______ eat too much junk food. It's bad for your health.
A. should B. shouldn't C. need D. may
易错题8
We ______ keep our classroom clean and tidy.
A. should B. shouldn't C. needn't D. may not
基础过关
一、根据句意和汉语提示写单词
1. Skateboarding is my favorite ______.（滑板运动）
2. I often jump ______ in the park.（绳子）
3. Running on a ______ is boring but effective.（跑步机）
4. There is a useful fitness ______ on my phone.（应用程序）
5. Eating more vegetables is good for your ______.（健康）
6. I ______ play basketball, maybe once a month.（很少）
7. He goes swimming three ______ a week.（次）
8. We should drink milk every day to keep ______.（强壮的）
二、易错选择：单项选择
9. — ______ do you visit your grandparents?
— Every Sunday.
A. How long B. How often C. How soon D. How far
10. My father drinks milk ______a day to keep healthy.
A. one B. twice C. every D. three
11. Apples are ______ food. We should eat them often.
A. health B. healthy C. unhealthy D. healthily
12. — How often does Tom exercise?
— He ______ exercises. He is very lazy.
A. often B. usually C. seldom D. always
13. You ______ eat too much candy. It's bad for your teeth.
A. should B. must C. shouldn't D. need
14. Doing morning ______ is a good habit.
A. exercise B. exercises C. exercising D. an exercise
15. — ______ I help you with the housework?
— Sure, thanks.
A. Must B. Should C. Need D. Shall
三、词形变化：用所给单词的适当形式填空
16. Look! The children are ______ (skip) rope over there.
17. We should eat more ______ (vegetable) and fruit.
18. He goes to the gym ______ (two) a week.
19. It's important to keep ______ (health).
20. She ______ (hard) ever eats hamburgers because they are junk food.
四、句型转换：按要求完成句子
21. I exercise three times a week.（对划线部分提问）
______ ______ do you exercise?
22. He sleeps for eight hours every night.（对划线部分提问）
______ ______ does he sleep every night?
23. You should eat more fruit.（改为否定句）
You ______ ______ more fruit.
24. She usually plays badminton on Sundays.（对划线部分提问）
______ ______ she usually play badminton?
25. We must keep our classroom clean.（改为同义句）
七、书面表达
本单元书面表达常考题目是"介绍你的生活习惯以保持健康"。写作时可从以下几个方面写：
• 运动频率（How often do you exercise?）
• 饮食习惯（What do you eat?）
• 睡眠习惯（How long do you sleep?）
• 给出建议（Should/Shouldn't）
题目： 假如你是李华，请根据下面提示写一篇60词左右的英语短文，介绍你是如何保持健康的。
提示：
1. How often do you exercise?
2. What sports do you like?
3. What do you usually eat?
4. How long do you sleep?
5. Give one suggestion about keeping fit.
参考答案与解析
一、基础过关答案
1. skateboarding
2. rope
3. treadmill
4. app
5. health
6. seldom
7. times
8. strong
解析：do morning exercises 是固定搭配，意为"做早操"，此时exercise是可数名词复数。
15. D
解析：Shall I...? 是用于征求对方意见的句型，意为"我可以……吗？"。
三、词形变化答案与解析
16. skipping
解析：Look! 提示用现在进行时，结构是 be + doing。
17. vegetables
解析：vegetable是可数名词，此处表示泛指，常用复数形式。
18. twice
解析：twice a week 一周两次，是固定表达。
19. healthy
解析：keep 是系动词，后接形容词作表语。health的形容词形式是healthy。
20. hardly
解析：此处需要一个副词修饰动词eats。hardly ever 几乎不，符合语境。
四、句型转换答案
21. How often
22. How long
23. shouldn't eat
24. When does
25. have to
五、语法填空答案
26. should
27. skateboarding
28. healthy
29. them
30. shouldn't
31. strong
32. must
33. keep