内容正文:
教学课件
译林英语七年级上册
Unit4 语法专项——时间介词 + 频率副词
全解精讲+分层练习
1
学习目标
1 掌握in/on/at三个时间介词的适用场景及用法
2 熟记频率副词的等级排序及句中位置规则
3 能准确区分并运用时间介词完成各类填空
4 能根据语境选择合适的频率副词,规范造句
时间介词核心定义
时间介词是用于描述动作发生时间的词
核心作用:明确动作发生的具体时间范围
本课时重点:in/on/at三个高频时间介词
关键原则:根据时间“范围大小”选择对应介词
易错提醒:不同时间类型对应固定介词,不可混淆
时间介词in的用法(一)
in主要用于“大范围、不具体”的时间
适用场景1:一天中的部分时段(早、中、晚)
示例:in the morning(在早上)、in the evening(在晚上)
适用场景2:月份(一年中的12个月份)
示例:in January(在一月)、in September(在九月)
例句:We have a music class in the afternoon.
时间介词in的用法(二)
适用场景3:季节(春、夏、秋、冬四个季节)
示例:in spring(在春天)、in winter(在冬天)
适用场景4:年份(具体的某一年)
示例:in 2024(在2024年)、in 2026(在2026年)
易错提醒:in不用于具体某一天,仅用于大范围时间
时间介词on的用法(一)
on主要用于“具体、明确”的某一天及相关时段
适用场景1:具体某一天(星期几)
示例:on Tuesday(在周二)、on Sunday(在周日)
适用场景2:具体日期(几月几日)
示例:on 10th April(在4月10日)、on 25th December(在12月25日)
例句:They will go for a picnic on Saturday.
时间介词on的用法(二)
适用场景3:带修饰的某天时段(如星期X的上午/下午)
示例:on Monday morning(在周一上午)、on Friday evening
适用场景4:特殊节日(具体的节日当天)
示例:on Mid-Autumn Day(在中秋节)、on Children’s Day(在儿童节)
易错提醒:带修饰的时段用on,无修饰的时段用in
时间介词at的用法
at主要用于“具体到点、固定搭配”的时间
适用场景1:具体时刻(几点几分,精确到小时/分钟)
示例:at 8:10(在8点10分)、at 17:30(在17点30分)
适用场景2:年龄(具体的岁数)
示例:at the age of 13 (在13岁时)、at the age of 5 在5岁时)
适用场景3:固定搭配 示例:at noon(在中午)、at night(在夜晚)
时间介词对比表(核心)
介词 适用时间类型 核心特征 示例
in 大范围、不具体 月、季、年、早晚 in July
on 具体某一天及时段 星期、日期、节日 on 6th May
at 具体时刻、固定搭配 几点几分、年龄 at 9:00
口诀:in接大范围,on接具体天,at接具体点
时间介词易错点提醒(一)
易错点1:in the morning/afternoon/evening(无修饰用in)
错例:on the morning(×) 正例:in the morning(√)
易错点2:on Monday morning(带修饰用on)
错例:in Monday morning(×) 正例:on Monday morning(√)
易错点3:at noon/night(固定搭配,不可用in/on)
错例:in noon(×) 正例:at noon(√)
时间介词易错点提醒(二)
易错点4:年份、月份前只用in,不用on/at
错例:on 2025(×) 正例:in 2025(√)
易错点5:具体日期前只用on,不用in/at
错例:in 12th March(×) 正例:on 12th March(√)
易错点6:年龄前用at,不用in/on
错例:in 14 years old(×) 正例:at the age of 14 (√)
时间介词基础小练习
1. __________ 9:40 a.m.
2. __________ Wednesday
3. __________ August
4. __________ 2024
5. __________ Saturday afternoon
6. __________ night
at
on
in
in
on
at
频率副词核心定义
频率副词用于描述动作发生的“频率高低”
核心作用:明确动作重复发生的次数多少
本课时重点:6个高频频率副词及位置规则
关键原则:位置由句子中的动词类型决定
易错提醒:频率副词位置错误是最常见考点
频率副词等级排序(从低到高)
1. never(从不)→ 频率0%,完全不发生
2. seldom(很少)→ 频率约20%,偶尔发生
3. sometimes(有时)→ 频率约40%,时有发生
4. often(经常)→ 频率约60%,频繁发生
5. usually(通常)→ 频率约80%,大多时候发生
6. always(总是)→ 频率100%,每次都发生
频率副词位置规则(一)
规则1:句子中含实义动词(如play、eat、read)
频率副词位置:放在“实义动词前面”
核心逻辑:实义动词是句子核心,副词修饰动词
例句1:He often plays football after school.
(often在实义动词play前)
例句2:She usually eats breakfast at 7:00.(usually在实义动词eat前)
频率副词位置规则(二)
规则2:句子中含be动词(am、is、are)
频率副词位置:放在“be动词后面”
核心逻辑:be动词是系动词,副词修饰主语状态
例句1:She is always late for class.(always在be动词is后)
例句2:We are sometimes busy on weekends.(sometimes在be动词are后)
频率副词易错点提醒
易错点1:实义动词后放频率副词(最常见错误)
错例:He plays often football(×) 正例:He often plays football(√)
易错点2:be动词前放频率副词
错例:She always is happy(×) 正例:She is always happy(√)
易错点3:混淆频率等级,如用seldom表示“经常”
技巧:结合频率百分比,记忆等级顺序
频率副词对比例句
含实义动词例句(副词在动词前)
1. I sometimes go to the park on weekends.
2. They often watch TV in the evening.
含be动词例句(副词在be动词后)
1. He is never late for school.
2. We are usually free on Friday afternoon.对比记忆:动词类型决定副词位置
频率副词基础小练习
用never/seldom/sometimes/often/usually/always填空
1. I __________ drink coffee—I don’t like its taste.
2. She __________ goes to the cinema—maybe once a month.
3. We __________ have dinner at 6:30 p.m.—almost every day.
4. He __________ plays basketball—about four times a week.
5. They __________ get up early—they are never late.
never
seldom
usually
often
always
进阶练习题-时间介词填空
1. We have a test __________ 10:00 a.m. __________ Thursday.
2. She was born __________ 2012, __________ October.
3. They go hiking __________ autumn, __________ weekends.
4. I usually have a rest __________ noon.
5. He started to learn English __________ the age of 6.
6. We celebrate National Day __________ 1st October.
at
on
in
in
in
on
at
at
on
进阶练习题-频率副词填空
1. My father __________ cooks—my mother does it most of the time.
2. Lisa __________ helps others—everyone likes her.
3. I __________ walk to school, but sometimes I take the bus.
4. Tom __________ plays computer games on school days—it’s not allowed.
5. The moon __________ rises in the east—it always rises in the west.
6. We __________ visit our grandparents __________ weekends.
seldom
often/always
usually
never
never
often
on
提升练习题-语法填空(一)用时间介词(in/on/at)或频率副词填空
1. She __________ goes to bed __________ 9:30 p.m.
2. We have art class __________ the afternoon __________ Wednesday.
3. He ______________ eats ice cream because he is afraid of cold.
4. They will have a party __________ New Year’s Day.
5. I __________ read books __________ the evening.
6. She started to swim __________ the age of 8.
usually
at
in
on
seldom/never
on
often
in
at
提升练习题-语法填空(二)用时间介词(in/on/at)或频率副词填空
1. We __________ have a school trip __________ spring every year.
2. He is __________ late—he gets up early every day.
3. They play football __________ 4:00 p.m. __________ Friday.
4. I __________ go to the library __________ weekends.
5. She was born __________ 15th August, __________ 2013.
6. The sun __________ rises in the east—this is a natural rule.
usually
in
never
at
on
sometimes
on
on
in
always
综合练习题-短文填空 阅读短文,用时间介词或频率副词填空
I go to school (1) __________ 7:10 a.m. (2) __________ weekdays.
(3) __________ the morning, we (4) __________ have Chinese and English.
I (5) __________ eat lunch at school (6) __________ noon.(7) __________ Wednesday afternoon, I (8) __________ play ping-pong with friends.(9) __________ summer, we (10) __________ have a holiday (11) __________ July.I (12) __________ go to the zoo with my family (13) __________ weekends.(14) __________ the age of 9 , I (15) __________ read newspapers (16) __________ the evening.I am (17) __________ happy because my life is colorful.
at
on
In
usually
often
at
On
sometimes
in
usually
in
often
on
At
usually
in
always
解题技巧总结(时间介词)
1 先判断时间类型:大范围(in)、具体天(on)、具体点(at)
2 记住固定搭配:at noon/night、on节日/星期、in月/季/年
3 区分带修饰和无修饰的时段:带修饰用on,无修饰用in
4 遇到年龄、具体时刻,直接用at,无需犹豫
5 做完后通读句子,检查介词与时间是否匹配
解题技巧总结(频率副词)
1 先判断句子动词类型:实义动词(副词在前)、be动词(副词在后)
2 根据语境判断频率:完全不发生用never,总是发生用always
3 记住频率等级顺序,避免混淆seldom和often
4 注意句子逻辑:如“不喜欢”对应never,“几乎每天”对应usually
5 做完后检查副词位置,避免放错地方
高频易错点汇总
时间介词易错点:
1 混淆in/on修饰时段(如in Monday morning×)
2 具体日期用in(如in 8th June×)
3 固定搭配用错介词(如in noon×)
频率副词易错点:
1 实义动词后放频率副词(如play often×)
2 be动词前放频率副词(如always is×)
核心知识点总结(一)
时间介词核心:
1 in:大范围(月、季、年、早晚)
2 on:具体天(星期、日期、节日、带修饰时段)
3 at:具体点(时刻、年龄、固定搭配)
口诀:in大on小天,at在具体点
关键:根据时间范围大小选择介词
核心知识点总结(二)
频率副词核心:
1 等级排序:never→seldom→sometimes→often→usually→always
2 位置规则:实义动词前,be动词后
3 语境匹配:根据动作频率选择合适副词
关键:先判断动词类型,再确定副词位置
教学课件
Unit4 语法专项——时间介词 + 频率副词
Thank you for listening!
30
$