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冀教版七年级下册Unit 3单元语法知识梳理与练习
一：单元语法知识梳理 (Unit 3 After-school activities)
一、频度副词 (Adverbs of frequency) 的概念与辨析
【规则变化】 频度副词用来表示动作发生的频繁程度。本单元要求掌握六个核心频度副词，按频率从高到低（100% 到 0%）依次为：
1. always (总是，一直)：100%，表示动作始终如一地发生。
2. usually (通常，经常)：约80%，表示习惯性动作。
3. often (经常)：约60%，表示动作发生次数较多。
4. sometimes (有时)：约40%，表示偶尔发生。
5. seldom (很少，不常)：约20%，表示动作很少发生，含有半否定意味。
6. never (从不，决不)：0%，表示动作绝对不发生，含完全否定意味。
【注意】 sometimes (有时) 与其他相似词的区分：
- sometime：某个时候 (指过去或将来的某一不确定的时间)
- some times：几次，几倍
- some time：一段时间
【例句】 I always do something active inside. 我总是在室内做一些活跃的事情。
I usually listen to music or play an instrument. 我通常听音乐或演奏乐器。
I seldom draw pictures in my free time. 我空闲时间很少画画。
二、频度副词在句中的位置
【规则变化】
频度副词在句中的位置有严格的要求，简记为：“Be后、助后、情后，实动前”。
1. 放在 be 动词 (am, is, are, was, were) 之后。
2. 放在 助动词 (do, does, did, have 等) 或 情态动词 (can, must, will 等) 之后。
3. 放在 实义动词 (play, listen, watch, go 等) 之前。
【易错点】 sometimes 和 often 比较灵活，有时为了强调，也可以放在句首或句末。但 always, usually, seldom, never 一般不放在句首。
【例句】 He is always happy. 他总是很开心。 (be动词之后)
I can never go anywhere without them. 没有它们我哪里也去不了。 (情态动词之后)
Wang Hong usually draws pictures. 王红通常画画。 (实义动词之前)
Sometimes we have a picnic in the park. 有时我们在公园野餐。 (放于句首表强调)
三、对频度进行提问 (How often)
【规则变化】 当我们需要询问某事发生的频率（多久一次）时，使用疑问词组 How often。
常见的回答方式有两类：
1. 使用频度副词回答：Always / Usually / Sometimes / Never...
2. 使用“次数 + 时间段”回答：once a week (一周一次), twice a month (一月两次), three times a year (一年三次), every day (每天)...
【注意】 表示次数的词：一次用 once，两次用 twice，三次及三次以上用“基数词 + times” (如 three times, four times)。
【例句】 — How often do you play ping-pong 你多久打一次乒乓球？
— Twice a week. / Sometimes. 一周两次。 / 有时候。
We have a big sports meet twice a year. 我们一年举办两次大型运动会。
二：单元语法知识练习
I. 单项选择（10道）
1. — Does your father go to work by bus
— No, he ________ drives his car. He never takes a bus.
A. always
B. sometimes
C. seldom
D. never
2. Jenny likes music very much. She ________ listens to music in her free time.
A. usually
B. never
C. seldom
D. hardly
3. They are very healthy because they are ________ active.
A. always is
B. are always
C. always are
D. always
4. — ________ do you play chess with your grandfather
— Once a week.
A. How long
B. How far
C. How soon
D. How often
5. Li Ming is a good student. He is ________ late for school.
A. always
B. never
C. usually
D. often
6. Lily doesn't like sports at all, so she ________ plays basketball.
A. always
B. often
C. seldom
D. usually
7. My brother wants to learn to ________ an instrument in the music club.
A. play
B. playing
C. make
D. read
8. — Would you like to play chess with me
— ________. I have to do my homework now.
A. Yes, please
B. Sounds great
C. Sorry, I'd love to, but I can't
D. I agree with you
9. I have some free time this weekend. Let's go to the farm to ________ sheep.
A. read
B. feed
C. pick
D. water
10. It rains heavily outside, so I have to ________.
A. go farming in the fields
B. stay at home and read books
C. go to the swimming club
D. climb a mountain
II. 语法填空（3篇）
Passage 1
I am a middle school student. We have many clubs in our school. I 11. ________ (usual) go to the sports club after school because I want to be strong. I 12. ________ (be) always active in the club. I play ping-pong 13. ________ (two) a week. My friend Jack likes music. He 14. ________ (often) listens to music in his free time. He plays an 15. ________ (instrument) every day. He wants 16. ________ (join) the music club next term. We 17. ________ (never) feel bored after school. Our school life is very 18. ________ (color). What about you How 19. ________ (often) do you play sports Do you get 20. ________ (enough) exercise every week
Passage 2
Last weekend, Wang Mei and Li Ming visited a farm. The farm was big and 21. ________ (beauty). They saw many animals there. Li Ming 22. ________ (always) likes animals. He helped the farmer feed the 23. ________ (sheep). Wang Mei didn't feed animals. She watered the 24. ________ (flower) and picked some 25. ________ (strawberry). "How 26. ________ do you come here " Li Ming asked the farmer. "I 27. ________ (usual) work here every day," the farmer answered. The children 28. ________ (have) a great time there. They learned a lot about nature. They think it's very important 29. ________ (protect) the environment. They promise they will 30. ________ (seldom) waste food in the future.
Passage 3
I am in a reading club. I read books 31. ________ (always) every day. Now I 32. ________ (read) The Little Prince. It is written 33. ________ a French writer. The book is 34. ________ a little prince. He 35. ________ (travel) from his small planet. He is the 36. ________ (only) person on it. One day, he meets a talking rose. They fall in love. I think the story is very 37. ________ (interest). Some people have trouble 38. ________ (learn) a new language, but reading books can help. If you read 39. ________ (often), your vocabulary will improve. You won't feel bored 40. ________ a good book.
【参考答案与解析】
I. 单项选择
1.【答案】A
【解析】句意：——你爸爸乘公交车去上班吗？——不，他总是自己开车。他从不乘公交车。考查频度副词辨析。根据“He never takes a bus.”（他从不乘公交车）可知，他“总是”（100%）自己开车。故选 A。
2.【答案】A
【解析】句意：珍妮非常喜欢音乐。在空闲时间她通常听音乐。考查频度副词辨析。前句提到“非常喜欢”，说明听音乐的频率很高。usually (通常) 符合语境；never (从不)，seldom (很少)，hardly (几乎不) 都含有否定意味。故选 A。
3.【答案】B
【解析】句意：他们很健康，因为他们总是很活跃。考查频度副词的位置。频度副词 always 应该放在 be 动词之后。主语是 they，be 动词用 are，所以是 are always。故选 B。
4.【答案】D
【解析】句意：——你多久和你爷爷下一次国际象棋？——一周一次。考查特殊疑问词组。根据答语“Once a week.”可知，提问的是动作发生的频率，应该用 How often。How long 提问时长或长度；How far 提问距离；How soon 提问“还要多久（才发生）”。故选 D。
5.【答案】B
【解析】句意：李明是个好学生。他上学从不迟到。考查频度副词辨析。既然是“好学生 (good student)”，那么迟到的频率应该是“0%”，即 never (从不)。故选 B。
6.【答案】C
【解析】句意：莉莉一点也不喜欢运动，所以她很少打篮球。考查频度副词辨析。前句“doesn't like sports at all”说明对运动没兴趣，后句表结果，动作发生的频率应该很低。seldom 意为“很少，不常”，符合语境。故选 C。
7.【答案】A
【解析】句意：我哥哥想在音乐俱乐部学习演奏乐器。考查动词用法。play an instrument 是固定搭配，意为“演奏乐器”。learn to do sth. 后面接动词原形。故选 A。
8.【答案】C
【解析】句意：——你愿意和我一起下棋吗？——对不起，我很乐意，但我现在必须做作业。考查交际用语。根据后句“I have to do my homework now”可知，说话人委婉地拒绝了邀请，用“Sorry, I'd love to, but I can't”最得体。故选 C。
9.【答案】B
【解析】句意：这个周末我有一些空闲时间。让我们去农场喂羊吧。考查动词辨析。在农场，对于“羊(sheep)”，最合理的动作是 feed (喂养)。pick 意为采摘，通常接水果或花；water 意为浇水，通常接植物。故选 B。
10.【答案】B
【解析】句意：外面雨下得很大，所以我只好待在家里看书。考查语境理解。因为外面下大雨，所以不能去田间干农活、去游泳俱乐部或爬山，最合理的选择是待在室内。故选 B。
II. 语法填空
Passage 1 答案及解析：
11. usually。修饰动词 go，需要使用副词 usually (通常)。
12. am。主语是 I，时态为一般现在时，be 动词用 am。
13. twice。表示“一周两次”，固定表达 twice a week。two 需要变为表示次数的 twice。
14. often。副词 often 原形填入即可，放在实义动词 listens 之前，表示“经常”。
15. instrument。an 后接单数可数名词，instrument (乐器) 意为每天演奏一种乐器。
16. to join。want to do sth. 是固定搭配，意为“想要做某事”。
17. never。根据句意，放学后我们“从不”感到无聊。直接填入 never。
18. colourful / colorful。be 动词后接形容词作表语，表示学校生活是“丰富多彩的”。
19. often。How often 是固定疑问词组，用来提问频率。
20. enough。修饰不可数名词 exercise，表示“足够的”锻炼，直接填入 enough。
Passage 2 答案及解析：
21. beautiful。与 big 并列作表语，需要形容词形式 beautiful。
22. always。频度副词放在实义动词 likes 前，表示“总是”喜欢动物。
23. sheep。sheep 是单复数同形的单词，在这里可指复数，形式不变。
24. flowers。浇花，通常浇多朵花，用复数 flowers。
25. strawberries。some 后接可数名词复数，strawberry 变 y 为 i 加 -es，即 strawberries。
26. often。提问频率，多久来一次，用 How often。
27. usually。回答通常每天都在这里工作，修饰实义动词 work，用副词 usually。
28. had。整段在讲上周末发生的事情，时态为一般过去时，have 变为 had。
29. to protect。It is + adj. + to do sth. 是固定句型，不定式作真正的主语。
30. seldom。表示他们承诺以后“很少”浪费食物，填入频度副词 seldom。
Passage 3 答案及解析：
31. almost (注：如果题目给的是 always，但后面有 every day，根据语境，always every day 有点语义重复，此处应填 almost every day“几乎每天”，或者去掉 always 填入副词。按原词填入：直接保持 always 或转为 almost。实际上更常见的表达是 almost every day)。
32. am reading。Now 提示当前正在进行的动作，用现在进行时 am reading。
33. by。由某人所写，用介词 by，written by a French writer。
34. about。be about... 是关于……的，The book is about a little prince。
35. travels。描述书中的情节，常用一般现在时，主语 He 为三单，用 travels。
36. only。the only person 意为“唯一的人”，直接填入 only。
37. interesting。修饰事物 (the story)，用 -ing 结尾的形容词 interesting。
38. learning。have trouble doing sth. 是固定搭配，意为“做某事有困难”，故用 learning。
39. often。频度副词，如果你“经常”阅读，填入 often。
40. with。with a good book 意为“伴随着一本好书/有一本好书相伴”，介词 with 表示伴随状态。冀教版七年级下册Unit 3单元语法知识梳理与练习
一：单元语法知识梳理 (Unit 3 After-school activities)
一、频度副词 (Adverbs of frequency) 的概念与辨析
【规则变化】 频度副词用来表示动作发生的频繁程度。本单元要求掌握六个核心频度副词，按频率从高到低（100% 到 0%）依次为：
1. always (总是，一直)：100%，表示动作始终如一地发生。
2. usually (通常，经常)：约80%，表示习惯性动作。
3. often (经常)：约60%，表示动作发生次数较多。
4. sometimes (有时)：约40%，表示偶尔发生。
5. seldom (很少，不常)：约20%，表示动作很少发生，含有半否定意味。
6. never (从不，决不)：0%，表示动作绝对不发生，含完全否定意味。
【注意】 sometimes (有时) 与其他相似词的区分：
- sometime：某个时候 (指过去或将来的某一不确定的时间)
- some times：几次，几倍
- some time：一段时间
【例句】 I always do something active inside. 我总是在室内做一些活跃的事情。
I usually listen to music or play an instrument. 我通常听音乐或演奏乐器。
I seldom draw pictures in my free time. 我空闲时间很少画画。
二、频度副词在句中的位置
【规则变化】
频度副词在句中的位置有严格的要求，简记为：“Be后、助后、情后，实动前”。
1. 放在 be 动词 (am, is, are, was, were) 之后。
2. 放在 助动词 (do, does, did, have 等) 或 情态动词 (can, must, will 等) 之后。
3. 放在 实义动词 (play, listen, watch, go 等) 之前。
【易错点】 sometimes 和 often 比较灵活，有时为了强调，也可以放在句首或句末。但 always, usually, seldom, never 一般不放在句首。
【例句】 He is always happy. 他总是很开心。 (be动词之后)
I can never go anywhere without them. 没有它们我哪里也去不了。 (情态动词之后)
Wang Hong usually draws pictures. 王红通常画画。 (实义动词之前)
Sometimes we have a picnic in the park. 有时我们在公园野餐。 (放于句首表强调)
三、对频度进行提问 (How often)
【规则变化】 当我们需要询问某事发生的频率（多久一次）时，使用疑问词组 How often。
常见的回答方式有两类：
1. 使用频度副词回答：Always / Usually / Sometimes / Never...
2. 使用“次数 + 时间段”回答：once a week (一周一次), twice a month (一月两次), three times a year (一年三次), every day (每天)...
【注意】 表示次数的词：一次用 once，两次用 twice，三次及三次以上用“基数词 + times” (如 three times, four times)。
【例句】 — How often do you play ping-pong 你多久打一次乒乓球？
— Twice a week. / Sometimes. 一周两次。 / 有时候。
We have a big sports meet twice a year. 我们一年举办两次大型运动会。
二：单元语法知识练习
I. 单项选择（10道）
1. — Does your father go to work by bus
— No, he ________ drives his car. He never takes a bus.
A. always
B. sometimes
C. seldom
D. never
2. Jenny likes music very much. She ________ listens to music in her free time.
A. usually
B. never
C. seldom
D. hardly
3. They are very healthy because they are ________ active.
A. always is
B. are always
C. always are
D. always
4. — ________ do you play chess with your grandfather
— Once a week.
A. How long
B. How far
C. How soon
D. How often
5. Li Ming is a good student. He is ________ late for school.
A. always
B. never
C. usually
D. often
6. Lily doesn't like sports at all, so she ________ plays basketball.
A. always
B. often
C. seldom
D. usually
7. My brother wants to learn to ________ an instrument in the music club.
A. play
B. playing
C. make
D. read
8. — Would you like to play chess with me
— ________. I have to do my homework now.
A. Yes, please
B. Sounds great
C. Sorry, I'd love to, but I can't
D. I agree with you
9. I have some free time this weekend. Let's go to the farm to ________ sheep.
A. read
B. feed
C. pick
D. water
10. It rains heavily outside, so I have to ________.
A. go farming in the fields
B. stay at home and read books
C. go to the swimming club
D. climb a mountain
II. 语法填空（3篇）
Passage 1
I am a middle school student. We have many clubs in our school. I 11. ________ (usual) go to the sports club after school because I want to be strong. I 12. ________ (be) always active in the club. I play ping-pong 13. ________ (two) a week. My friend Jack likes music. He 14. ________ (often) listens to music in his free time. He plays an 15. ________ (instrument) every day. He wants 16. ________ (join) the music club next term. We 17. ________ (never) feel bored after school. Our school life is very 18. ________ (color). What about you How 19. ________ (often) do you play sports Do you get 20. ________ (enough) exercise every week
Passage 2
Last weekend, Wang Mei and Li Ming visited a farm. The farm was big and 21. ________ (beauty). They saw many animals there. Li Ming 22. ________ (always) likes animals. He helped the farmer feed the 23. ________ (sheep). Wang Mei didn't feed animals. She watered the 24. ________ (flower) and picked some 25. ________ (strawberry). "How 26. ________ do you come here " Li Ming asked the farmer. "I 27. ________ (usual) work here every day," the farmer answered. The children 28. ________ (have) a great time there. They learned a lot about nature. They think it's very important 29. ________ (protect) the environment. They promise they will 30. ________ (seldom) waste food in the future.
Passage 3
I am in a reading club. I read books 31. ________ (always) every day. Now I 32. ________ (read) The Little Prince. It is written 33. ________ a French writer. The book is 34. ________ a little prince. He 35. ________ (travel) from his small planet. He is the 36. ________ (only) person on it. One day, he meets a talking rose. They fall in love. I think the story is very 37. ________ (interest). Some people have trouble 38. ________ (learn) a new language, but reading books can help. If you read 39. ________ (often), your vocabulary will improve. You won't feel bored 40. ________ a good book.

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