Unit 7 The secret of memory 暑假预习讲义(含答案)——2026年新教材沪教版英语八年级上册

资源下载
  1. 二一教育资源

Unit 7 The secret of memory 暑假预习讲义(含答案)——2026年新教材沪教版英语八年级上册

资源简介

Unit 7 The secret of memory 暑假预习讲义
01 课前导学
关键词 内容
学习目标 1. 能够正确使用if条件句(主将从现)和unless条件句。 2. 能够掌握本单元核心词汇(mentally, maintain, relax, tend, normal, forgetfulness, decline, memory, improve, link, technique, healthy, regular, stressed等)。 3. 能够了解提高记忆力的方法。 4. 能够理解记忆力与生活习惯的关系。
学习重点 1. if条件句的结构(if + 一般现在时,主句 + 一般将来时/情态动词)。 2. unless条件句的结构(unless + 一般现在时,主句 + 一般将来时/情态动词)。 3. if...not与unless的互相转换。 4. 描述记忆方法和技巧的表达。
学习难点 1. if条件句与unless条件句的区别(unless = if...not)。 2. 条件状语从句在句首时用逗号与主句隔开。 3. if...not转化为unless时,去掉not。 4. 条件句在具体语境中的准确运用。
02 核心词汇预览
1. mentally adv. 精神上;心理上
2. maintain v. 保持;维持
3. relax v. 放松;休息
4. tend v. 往往会;常常就
5. normal adj. 正常的
6. forgetfulness n. 健忘
7. decline v. 下降;衰退
8. memory n. 记忆
9. improve v. 改善;提高
10. link v. 连接;联系
11. technique n. 技巧;技术
12. healthy adj. 健康的
13. regular adj. 有规律的
14. stressed adj. 心力交瘁的;焦虑不安的
15. flash card n. 识字卡片
16. mental adj. 心理的;脑力的
17. physical adj. 身体的;体力的
18. active adj. 积极的;活跃的
19. ability n. 能力
20. research n. 研究
21. experiment n. 实验
22. password n. 密码
23. forget v. 忘记
24. memorize v. 记忆;记住
03 核心短语预览
1. play an important role in 在……中起重要作用
2. make a point of 特意;重视
3. in other words 换句话说
4. make up 编造;组成
5. as well as 也;和……一样
6. what's more 而且;更重要的是
7. last but not least 最后但同样重要的是
8. plenty of 大量的
9. tend to 往往会
10. memory loss 失忆;记忆力下降
11. in one's opinion 在某人看来
12. no wonder 难怪
13. in context 在语境中
14. take time to do 花时间做某事
15. by looking at 通过看
04 重点句型预览
1. Your memory plays an important role in your life. 你的记忆力在你的生活中起着重要作用。
2. It helps you remember who you are, where you live, what you have learnt and what you plan to do in the future. 它帮助你记住你是谁、你住在哪里、你学过什么以及你计划在未来做什么。
3. So, how can you improve your memory? 那么,你如何提高记忆力呢?
4. First, it is helpful to live a mentally active life. 首先,过一种脑力活跃的生活是有帮助的。
5. Make a point of trying new things. 重视尝试新事物。
6. For example, you will exercise your brain if you learn to play a new instrument or learn a foreign language. 例如,如果你学习演奏一种新乐器或学习一门外语,你会锻炼你的大脑。
7. You can also improve your memory with brain games, such as crosswords, word games and maths puzzles. 你也可以通过益智游戏来提高记忆力,比如填字游戏、文字游戏和数学谜题。
8. Techniques like memory linking also work your brain and improve your memory. 像记忆连接这样的技巧也能锻炼你的大脑,提高你的记忆力。
9. In memory linking, you make mental connections to help you remember things. 在记忆连接中,你建立心理联系来帮助你记忆事物。
10. For example, you can make up a story to link items in a list so that you will remember them. 例如,你可以编一个故事来连接列表中的项目,这样你就能记住它们。
11. You will be exercising your brain as well as improving your memory! 你既锻炼了大脑,又提高了记忆力!
12. Second, if you live a healthy life, your memory will work better. 第二,如果你过健康的生活,你的记忆力会更好地工作。
13. Healthy eating habits are especially important, and a healthy diet helps maintain a good memory. 健康的饮食习惯尤为重要,健康的饮食有助于保持良好的记忆力。
14. Research shows that eating green vegetables, nuts, berries, and oily fish can improve your ability to remember things. 研究表明,吃绿色蔬菜、坚果、浆果和油性鱼类可以提高你的记忆力。
15. What's more, regular physical exercise and getting enough sleep also help improve your memory. 更重要的是,定期的体育锻炼和充足的睡眠也有助于提高记忆力。
16. Last but not least, it is important to get plenty of rest. 最后但同样重要的是,得到充分的休息很重要。
17. Unless you take time to relax, your brain will find it hard to remember things. 除非你花时间放松,否则你的大脑会发现很难记住事情。
18. Besides, if you get too stressed or worried, your memory will become less sharp. 此外,如果你变得过于紧张或担心,你的记忆力会变得不那么敏锐。
19. Everyone has moments of forgetfulness and memory tends to decline with age. 每个人都有健忘的时刻,记忆力往往会随着年龄的增长而下降。
20. Therefore, it is quite normal for people to experience memory loss as they get older. 因此,随着年龄增长,人们经历记忆力下降是很正常的。
21. However, you can maintain and even improve your memory if you exercise your brain, live a healthy life and make time to relax! 然而,如果你锻炼大脑、过健康的生活并腾出时间放松,你可以保持甚至提高你的记忆力!
22. If you do not get enough sleep, you will not remember things well. 如果你没有充足的睡眠,你就不会很好地记住事情。
23. Unless you get enough sleep, you will not remember things well. 除非你有充足的睡眠,否则你不会很好地记住事情。
24. If you put salt into water, it disappears. 如果你把盐放进水里,它就会消失。
05 语法精讲与考点梳理
考点1:if条件句(主将从现)
【定义】if条件句表示在某种条件下,某事会发生。遵循“主将从现”原则。
【结构公式】
if从句(一般现在时),主句(一般将来时/情态动词+动词原形)
【用法分类】
(1)主句用一般将来时
例句:If you live a healthy life, your memory will work better.
例句:If you learn to play a new instrument, you will exercise your brain.
(2)主句用情态动词
例句:If you get too stressed, your memory can become less sharp.
(3)if从句在前,用逗号隔开
例句:If you get too stressed, your memory will become less sharp.
(4)if从句在后,不用逗号
例句:Your memory will become less sharp if you get too stressed.
【要点详解】
- if从句用一般现在时表示将来(不用will)。
- 主句用一般将来时(will)或情态动词(can/may/should等)。
- 这就是“主将从现”原则。
【练习1】If you ______ (get) too stressed, your memory will become less sharp.
【答案】get
【详解】句意:如果你变得过于紧张,你的记忆力会变得不那么敏锐。if从句用一般现在时,主语you用get。故填get。
考点2:unless条件句
【定义】unless表示“除非”,相当于if...not。
【结构公式】
unless从句(一般现在时),主句(一般将来时/情态动词+动词原形)
【用法分类】
(1)unless引导从句,主句用将来时
例句:Unless you take time to relax, your brain will find it hard to remember things.
(2)unless从句在句首时用逗号隔开
例句:Unless you get enough sleep, you will not remember things well.
(3)unless从句在主句后时不用逗号
例句:You will not remember things well unless you get enough sleep.
【要点详解】
- unless本身已含否定意义,相当于if...not。
- unless从句中用肯定形式,不用否定形式。
- 转化规则:unless + 肯定句 = if + 否定句。
【练习1】Unless you ______ (take) time to relax, your brain will find it hard.
【答案】take
【详解】句意:除非你花时间放松,否则你的大脑会发现很难。unless从句用一般现在时,主语you用take。故填take。
考点3:if...not与unless的互换
【定义】unless可以替换if...not,两者意思相同。
【用法对比】
if...not → unless
原句 转换后
If you do not get enough sleep, you will not remember things well. Unless you get enough sleep, you will not remember things well.
If you don't take time to relax, your brain will find it hard. Unless you take time to relax, your brain will find it hard.
unless → if...not
原句 转换后
Unless you get enough sleep, you will not remember things well. If you don't get enough sleep, you will not remember things well.
【要点详解】
- 转换时,unless变为if,从句中的谓语动词变为否定形式。
- 或者把if...not中的if...not改为unless,去掉否定。
【练习1】If you do not get enough sleep, you will not remember things well.
→ ______ you get enough sleep, you will not remember things well.
【答案】Unless
【详解】句意:除非你有充足的睡眠,否则你不会很好地记住事情。if...not可改为unless。故填Unless。
考点4:if和unless的其他用法
【定义】if条件句还可用于描述一定会发生的结果(科学事实、普遍规律)。
【用法分类】
(1)描述一定会发生的结果(主句用一般现在时)
例句:If you put salt into water, it disappears.
例句:If you mix blue and yellow, you get green.
(2)if从句和主句都用一般现在时
例句:If you take a fish out of water, it dies.
例句:If you switch off the lamp, the room becomes dark.
【要点详解】
- 当if条件句描述客观事实或科学规律时,主句也用一般现在时。
- 此时if从句和主句都用一般现在时。
【练习1】If you ______ (put) wood into water, it ______ (float).
【答案】put; floats
【详解】句意:如果你把木头放进水里,它会漂浮。描述科学事实,主句和从句都用一般现在时。故填put; floats。
考点5:阅读策略——过渡词(Transitional Words)
【定义】过渡词用于标记观点之间的过渡,帮助读者理解文章结构。
【常见过渡词】
类别 过渡词 功能
列举 first, second, third, last but not least 列出并列观点
递进 what's more, besides, in addition 补充额外信息
因果 therefore, as a result, because, so 表示因果关系
转折 however, but, although 表示转折关系
举例 for example, such as 举例说明
【练习1】找出文章中的过渡词。
First, it is helpful to live a mentally active life. ... Second, if you live a healthy life, your memory will work better. ... Last but not least, it is important to get plenty of rest.
【答案】First, Second, Last but not least
06 重点归纳
一、if条件句
(1)结构:if + 一般现在时,主句 + 一般将来时/情态动词。
(2)主将从现原则。
(3)描述客观事实时,主句和从句都用一般现在时。
二、unless条件句
(1)结构:unless + 一般现在时,主句 + 一般将来时/情态动词。
(2)unless = if...not。
(3)转化规则:unless + 肯定句 = if + 否定句。
三、过渡词
(1)列举:first, second, third, last but not least。
(2)递进:what's more, besides, in addition。
(3)因果:therefore, as a result。
07 过关检测
一、用所给词的适当形式填空(共8题)
1. If you ______ (get) too stressed, your memory will become less sharp.
2. Unless you ______ (take) time to relax, your brain will find it hard.
3. If you ______ (put) salt into water, it ______ (disappear).
4. If you ______ (mix) blue and yellow, you ______ (get) green.
5. Unless you ______ (get) enough sleep, you will not remember things well.
6. Your memory will become less sharp if you ______ (get) too stressed.
7. If you ______ (live) a healthy life, your memory ______ (work) better.
8. You will exercise your brain if you ______ (learn) to play a new instrument.
二、按要求改写句子(用unless或if...not)(共4题)
1. If you do not get enough sleep, you will not remember things well.
→ ______ you get enough sleep, you will not remember things well.
2. Unless you take time to relax, your brain will find it hard.
→ If you ______ ______ time to relax, your brain will find it hard.
3. If you don't take time to relax, your brain will find it hard.
→ ______ you take time to relax, your brain will find it hard.
4. Unless you get enough sleep, you will not remember things well.
→ If you ______ ______ enough sleep, you will not remember things well.
三、单项选择(共8题)
1. If you ______ too stressed, your memory will become less sharp.
A. get B. gets C. will get D. got
2. Unless you ______ time to relax, your brain will find it hard.
A. take B. takes C. will take D. took
3. If you ______ salt into water, it disappears.
A. put B. puts C. will put D. putting
4. Unless you ______ enough sleep, you will not remember things well.
A. get B. gets C. will get D. got
5. If you ______ a healthy life, your memory will work better.
A. live B. lives C. will live D. living
6. Your memory will become less sharp if you ______ too stressed.
A. get B. gets C. will get D. got
7. If you ______ to play a new instrument, you will exercise your brain.
A. learn B. learns C. will learn D. learnt
8. You will exercise your brain if you ______ to play a new instrument.
A. learn B. learns C. will learn D. learnt
四、完成句子(共6题)
1. 如果你变得过于紧张,你的记忆力会变得不那么敏锐。
If you ______ too ______, your memory will become less sharp.
2. 除非你花时间放松,否则你的大脑会发现很难记住事情。
Unless you ______ time to ______, your brain will find it hard to remember things.
3. 如果你过健康的生活,你的记忆力会更好地工作。
If you ______ a healthy ______, your memory will work better.
4. 除非你有充足的睡眠,否则你不会很好地记住事情。
______ you get enough sleep, you will not remember things well.
5. 如果你把盐放进水里,它就会消失。
If you ______ salt into water, it ______.
6. 最后但同样重要的是,得到充分的休息很重要。
______ ______ ______ ______, it is important to get plenty of rest.
五、将下列句子翻译成英文(共3题)
1. 记忆力往往会随着年龄的增长而下降。
2. 健康的饮食有助于保持良好的记忆力。
3. 你既锻炼了大脑,又提高了记忆力。
参考答案
一、用所给词的适当形式填空
1. get(if从句用一般现在时)
2. take(unless从句用一般现在时)
3. put; disappears(描述科学事实,都用一般现在时)
4. mix; get(描述科学事实)
5. get(unless从句用一般现在时)
6. get(if从句用一般现在时)
7. live; will work(主将从现)
8. learn(if从句用一般现在时)
二、按要求改写句子
1. Unless
2. don't take
3. Unless
4. don't get
三、单项选择
1. A(if从句用一般现在时)
2. A(unless从句用一般现在时)
3. A(描述科学事实用一般现在时)
4. A(unless从句用一般现在时)
5. A(if从句用一般现在时)
6. A(if从句用一般现在时)
7. A(if从句用一般现在时)
8. A(if从句用一般现在时)
四、完成句子
1. get; stressed
2. take; relax
3. live; life
4. Unless
5. put; disappears
6. Last but not least
五、将下列句子翻译成英文
1. Memory tends to decline with age.
2. A healthy diet helps maintain a good memory.
3. You will be exercising your brain as well as improving your memory.

展开更多......

收起↑

资源预览