Unit4语法(时间介词/频率副词)讲解与练习-2026-2027学年译林版英语七年级上册暑假衔接

Unit4 School days语法讲解与练习 *时间介词 at/in/on *频率副词 第一部 时间介词 at/in/on超详细精讲 一、核心总口诀 at 点，on 天，in 年月季节早晚 具体某天用on，笼统时段用in，精准时刻用at 二、三大时间介词 完整用法对照表（必背） 介词 核心用法 具体适用场景 Unit4课本标准例句 at 用于具体时刻、固定短时间点 1.几点几分（精准时刻）2.正午、午夜、黄昏3..固定短语：at weekends / at lunchtime Lessons begin at 8:15. 课程8点15开始。 on 用于具体某一天 1. 星期几2.具体日期（几月几日） 3.具体某天的早中晚4.单日节日 I go to school on Monday. 我周一上学。 in 用于大范围、笼统时间段 1.年份、月份、季节2.泛指上午、下午、晚上3.世纪、时代 We have lessons in the morning. 我们上午上课。 三、逐个超细致精讲+满分例句 1. 介词 at（定点、时刻） 核心：所有“精准时间点”，全部用 at ✅ 具体时刻： at 6:00在6点 at 8:15在8点15分 at half past nine 在9点半 ✅ 固定特殊时间（考试必考固定搭配）： at noon 在正午 / at night 在夜里 / at midnight 在午夜 at lunchtime 在午餐时间 / at dinnertime 在晚餐时间 at weekends 在周末 2. 介词 on（定天、具体） 核心：只要能锁定“具体某一天”，一律用 on ✅ 星期前：on Monday 在周一 / on Friday 在周五 ✅ 具体日期前：on 1st October 在10月1日 ✅ 超级重难点：具体某天的早、中、晚，必须用 on on Monday morning 在周一早上 on a cold winter morning 在一个寒冷的冬日早晨 on the afternoon of Sunday 在周日下午 ✅ 单日节日：on Teachers’ Day 在教师节 3. 介词 in（定段、笼统） 核心：大范围、看不到具体几号、哪天，全部用 in ✅ 年份：in 2025 在2025年 ✅ 月份：in September 在九月 ✅ 季节：in spring / summer / autumn / winter ✅ 泛指早中晚（无具体修饰）： in the morning 在上午 / in the afternoon 在下午 / in the evening 在晚上 四、考试最高频易错特例（90%学生扣分点） 特例1：早中晚 in、on 区分（超级拉分点） ✅ 无修饰、泛指 → in：in the morning ✅ 有修饰、特指某一天 → on：on Sunday morning / on a hot afternoon 特例2：节日介词区分 ✅ 单日节日用 on：on Children’s Day / on New Year’s Day ✅ 持续性节日用 at：at Christmas / at the Spring Festival 特例3：免介词规则（必考陷阱） 当前面有 this / last / next / every 修饰时间，不加任何介词！ ✅ this morning（不加in） ✅ last Monday（不加on） ✅ every day（不加on/in/at） ✅ next week（不加in） ❌ 错误：on last Monday / in this morning 五、单元必考固定搭配汇总（直接背诵） 1. at 8:15 在8点15分 2. in the morning/afternoon/evening 在上午/下午/晚上 3. on Monday/Tuesday... 在周一/周二…… 4. at weekends 在周末 5. at lunchtime 在午餐时 6. on weekday mornings 在工作日早上 六、终极做题三步法 第一步：看是否有 this/last/next/every → 有，零介词 第二步：看是否是精准时刻（几点几分） → 是，用 at 第三步：看是否能锁定具体某一天 → 是用on，不是用in 七、极简总结（考前速记） at盯时刻，on盯天，in盯年月早晚 有修饰早晚用on，this/last/next/every不加冠 第二部分 频率副词超详细精讲（always/usually/often/sometimes/seldom/never） 一、什么是频率副词？（定义） 用来表示动作发生次数、频率高低的副词，叫做频率副词。 对应单元话题：日常作息、校园生活、习惯动作。 必考6个单词（默写+排序）：always、usually、often、sometimes、seldom、never 二、频率副词完整排序+概率+中文（满分必背） 从频率最高 → 频率最低，考试排序题、选词填空必考 频率副词 中文意思 发生概率 属性 always 总是、一直 100%（次次都做） 肯定 usually 通常 80%（大部分时候） 肯定 often 经常 60%（时常发生） 肯定 sometimes 有时 40%（偶尔发生） 中性 seldom 很少、不常 20%（几乎不） 否定含义 never 从不 0%（完全不做） 完全否定 排序口诀（永久不混） 总、通、经、有、很、从 always > usually > often > sometimes > seldom > never 三、【重中之重】频率副词位置规则（考试丢分重灾区） 万能黄金公式（整本单元核心） 1. Be动词(am/is/are) 之后 I am always busy on weekdays. 我工作日总是很忙。 He is never late for school. 他上学从不迟到。 2. 实义动词（动作动词）之前 I usually go to school at 7:00. 我通常七点上学。 She often plays football. 她经常踢足球。 They seldom watch TV. 他们很少看电视。 3. 助动词和实义动词中间 I don’t often get up early. 我不经常早起。 He doesn’t usually go home late. 他通常不晚回家。 唯一特殊：sometimes sometimes 位置最自由：句首、句中、句尾都可以 ✅ Sometimes I walk to school. ✅ I sometimes walk to school. 四、否定考点（超级易错） seldom/never 本身自带否定 句子有 never/seldom，绝对不能再加 not！ ✅ He never plays games. 他从不玩游戏。 ❌ He doesn’t never play games.（双重否定，错误） 五、高频问答考点（对划线部分提问） 1. 提问频率 → 统一用 How often（多久一次） He often swims. → How often does he swim? I always get up early. → How often do you get up early? 2. 回答固定搭配 How often 提问 → 只能用6个频率副词或次数回答 六、三单主谓一致重点 频率副词不影响三单变形！ 只要主语是三单（he/she/it/单数人名），动词必须变三单，不管前面是什么副词。 ✅ He usually goes to school by bike. ✅ She seldom plays basketball. 七、满分做题口诀 be后实前助中间，sometimes到处玩； never seldom带否定，句中不加not行； 频率提问how often，三单变形永不停。 【巩固练习】 一、用正确介词或频率副词填空 1. We have lessons ______ the morning. 2. Our lessons begin ______ 8:15 a.m. 3. I go to school ______ Monday. 4. He plays football ______ Saturday afternoon. 5. They go out ______ weekends. 6. I get up early ______ every morning. 7. She is busy ______ winter. 8. We have no classes ______ Sunday. 9. He is______ (从不) late for school. 10. I ______ (通常) walk to school. 11. They ______ (经常) do their homework after school. 12. She ______ (很少) watches TV at night. 13. ______ (有时) I play basketball with my friends. 14. My mother ______ (总是) cooks dinner for me. 15. We have a party ______ the afternoon of October 1st. 16. He meets his friends ______ lunchtime. 17. I go to the park ______ last Sunday.（不填/填介词） 18. They will have a trip ______ next week.（不填/填介词） 19. Cats sleep ______ the day and hunt ______ night. 20. I ______ am late for class. (never) 21. He ______ plays computer games. (seldom) 22. We ______ go swimming in summer. (often) 23. She is ______ happy on school days. (usually) 24. ______ do you read books? (多久一次) 25. I read books ______ (有时). 26. We study hard ______ school days. 27. He gets up late ______ Saturday mornings. 28. They ______ never ______ (be) late for work. 29. She ______ usually ______ (not go) home early. 30. I ______ always ______ (help) my mum with housework. 二、单项选择 1. I go to school ______ 7:00 every morning. A. in B. on C. at D. for 2. We have PE lessons ______ Monday afternoon. A. in B. on C. at D. of 3. He ______ late for school. A. is never B. never is C. never does D. does never 4. ______ do you play football? —Sometimes. A. How long B. How often C. How far D. How many 5. They go to the park ______ weekends. A. in B. on C. at D. of 6. She ______ watches TV in the evening. A. often is B. is often C. often does D. often 7. We have no classes ______ last Friday. A. in B. on C. at D. / 8. He ______ plays computer games, so he is good at study. A. always B. usually C. seldom D. often 9. Children like playing ______ summer. A. in B. on C. at D. for 10. I ______ walk to school, but sometimes I ride a bike. A. never B. usually C. seldom D. ever 11. The meeting is ______ the morning of September 10th. A. in B. on C. at D. for 12. They ______ late. They are hard-working. A. are never B. never are C. always are D. are always 13. ______ I get up late on Sundays. A. Seldom B. Sometimes C. Always D. Usually 14. He doesn’t ______ eat snacks between meals. A. never B. seldom C. often D. always not 15. We have lunch ______ noon at school. A. in B. on C. at D. for 16. She ______ her homework after school every day. A. always do B. always does C. does always D. do always 17. I go swimming ______ every summer. A. in B. on C. at D. / 18. He ______ tells lies, so we all trust him. A. always B. usually C. seldom D. never 19. How often ______ you ______ basketball? A. do; play B. does; play C. do; plays D. does; plays 20. They ______ busy on weekdays. A. often are B. are often C. often do D. do often 三、句型转换 1. He is always busy on weekdays.（改为否定句） He ______ ______ busy on weekdays. 2. I usually go to school on foot.（对划线部分提问） ______ ______ ______ ______ ______to school on foot? 3. They often play football after school.（改为一般疑问句） ______ they ______ ______ football after school? 4. She seldom watches TV at night.（改为同义句） She ______ ______ watch TV at night. 5. We have lessons in the morning.（改否定句） We ______ ______ lessons in the morning. 6. He gets up at 6:30 every day.（对划线部分提问） ______ ______ he ______ up every day? 7. Sometimes I walk home.（改为同义句） I ______ walk home. 8. They never eat fast food.（改为一般疑问句） ______ they ______ eat fast food? 9. I usually play basketball on Saturday afternoon.（对划线提问） ______ ______ you usually ______ basketball? 10. She is often late for school.（改否定句） She ______ ______ late for school. 11. We go to the park at weekends.（对划线提问） ______ ______ you go to the park? 12. He always does his homework carefully.（改否定句） He ______ ______ his homework carefully. 13. I get up early every morning.（改一般疑问句） ______ you ______ early every morning? 14. They sometimes go shopping on Sunday.（对划线提问） ______ ______ ______ go shopping on Sunday? 15. Millie often reads books in the library.（用never改写句子） Millie ______ ______ books in the library. 四、汉译英 1. 我早上八点十五分开始上课。____________________________________ 2. 我通常在周一到周五上学。____________________________________ 3. 他周末很少看电视。____________________________________ 4. 我们夏天总是去游泳。____________________________________ 5. 她周日下午有时打篮球。____________________________________ 6. 他们从不迟到。____________________________________ 7. 我们在学校中午吃午饭。____________________________________ 8. 你多久锻炼一次？____________________________________ 9. 我通常晚上做作业。____________________________________ 10. 在一个寒冷的冬日早晨，我们去了公园。_________________________________ Keys 一、填空题答案 1. in 2. at 3. on 4. on 5. at 6. / 7. in 8. on 9. never 10. usually 11. often 12. seldom 13. Sometimes 14. always 15. on 16. at 17. / 18. / 19. in; at 20. never 21. seldom 22. often 23. usually 24. How often 25. sometimes 26. on 27. on 28. are 29. doesn’t; go 30. always; help 二、单项选择答案 1-5: CBABC 6-10: DDCAB 11-15: BABCC 16-20: BDDAB 三、句型转换答案 1. is never 2. How often do you go 3. Do; often play 4. doesn’t often 5. don’t have 6. When does; get 7. sometimes 8. Do; never 9. When do; play 10. isn’t often 11. When do 12. never does 13. Do; get up 14. How often do they 15. never reads 四、汉译英标准答案 1. Our lessons begin at 8:15 a.m. 2. I usually go to school from Monday to Friday. 3. He seldom watches TV at weekends. 4. We always go swimming in summer. 5. She sometimes plays basketball on Sunday afternoon. 6. They are never late. 7. We have lunch at school at noon. 8. How often do you exercise? 9. I usually do my homework in the evening. 10. We went to the park on a cold winter morning. 2 / 2 学科网（北京）股份有限公司 $