Unit 3 Our digital lives语法练（含答案）2025-2026学年沪教版（2024）八年级英语上册

沪教版八年级英语上Unit 3 Our digital lives语法精练
（Comparative and superlative adjectives 形容词比较级和最高级）
一、词汇运用（紧扣单元“数字生活”主题）
1. With the development of the ________ (network), people can communicate more easily.
2. The ________ (multimedia) classroom helps teachers show videos and pictures to students.
3. My father is an ________ (expert) in digital technology.
4. ________ (Mobile) payment is becoming more and more popular in daily life.
5. The company warned us about the importance of protecting personal ________ (data).
6. This new ________ (laptop) is lighter and faster than my old one.
7. The ________ (screen) of the phone is larger than that of the previous model.
8. Digital books have a positive ________ (effect) on our reading habits.
9. She likes to share her life on ________ (social) media.
10. The ________ (weight) of the new tablet is only 500 grams.
11. We need to download this ________ (app) to use the online service.
12. The ________ (microchip) makes the computer work more efficiently.
13. His ________ (opinion) on digital education is different from mine.
14. The ________ (electronic) devices in our home are all connected to the network.
15. The ________ (breakthrough) in technology has changed our lives greatly.
二、句型转换（聚焦单元语法，强化形容词比较级和最高级用法）
1. This laptop is thin. That laptop is thinner.（合并为一句，用比较级）
That laptop is ________ ________ this one.
2. The old mobile phone is heavy. The new one is light.（用比较级对比）
The new mobile phone is ________ ________ the old one.
3. This digital camera is expensive. That one is more expensive.（用最高级表达“那一个最贵”）
That digital camera is ________ ________ ________ of the two.
4. Social media is important in our life. Emails are also important.（用as...as表示“一样重要”）
Social media is ________ ________ ________ emails in our life.
5. The first microchip was big. The modern one is small.（用比较级说明变化）
The modern microchip is ________ ________ the first one.
6. This app is useful. That app is more useful.（用比较级改写）
That app is ________ ________ this one.
7. The network speed in city A is fast. In city B, it's faster. In city C, it's the fastest.（用最高级描述C市）
City C has ________ ________ ________ network speed.
8. This tablet's battery life is long. That one's is longer.（合并为一句）
That tablet's battery life is ________ ________ this one's.
9. The old screen is not bright. The new screen is brighter.（用比较级强调差异）
The new screen is ________ ________ the old one.
10. Digital books are convenient. Paper books are also convenient.（用as...as表示“一样方便”）
Digital books are ________ ________ ________ paper books.
11. This software is good. That software is better.（用比较级说明）
That software is ________ ________ this one.
12. The first laptop was heavy. The modern laptop is much lighter.（用比较级突出变化）
The modern laptop is ________ ________ ________ the first one.
13. Mobile payment is safe. Cash payment is safer.（用比较级对比）
Cash payment is ________ ________ mobile payment.
14. This data storage is large. That one is larger.（用最高级描述“两者中更大的”）
That data storage is ________ ________ ________ of the two.
15. The effect of this app is positive. The effect of that app is more positive.（用比较级改写）
That app has a ________ ________ effect than this one.
三、阅读理解（围绕“数字生活”主题，渗透语法点）
A篇：Digital Devices
Digital devices like laptops and mobile phones have changed our lives. Today's laptops are much lighter than the first ones—some weigh only 1kg! Their screens are larger and brighter, making it easier to watch videos.
Mobile phones are more powerful than before. They can do many things: take photos, make payments, and connect to the network. Social media apps on phones let us talk to friends anytime, which is more convenient than sending letters.
The most important digital device for students might be the tablet. It's smaller than a laptop but can store more data. With it, students can download textbooks and take notes easily.
1. How are today's laptops different from the first ones
A. They are heavier B. They are much lighter
C. They have no screens D. They can't play videos
2. What can mobile phones do
A. Only make calls B. Take photos and make payments
C. Cook food D. Drive cars
3. Why is social media more convenient than sending letters
A. It's slower B. It lets us talk to friends anytime
C. It's more expensive D. It needs paper
4. What is the most important digital device for students, according to the passage
A. The laptop B. The mobile phone
C. The tablet D. The TV
5. How is a tablet different from a laptop
A. It's larger B. It's smaller and can store more data
C. It's heavier D. It can't download books
B篇：Effects of Digital Technology
Digital technology has both positive and negative effects. On the positive side, it brings big changes to communication—we can interview experts online instead of meeting them in person. Mobile payment makes shopping smoother than carrying cash.
On the negative side, spending too much time on screens is bad for eyes. Some people think social media causes more problems than good, as it can spread wrong messages.
Experts say the key is to use digital devices wisely. The best way is to balance online and offline life.
6. What is a positive effect of digital technology
A. It's bad for eyes B. It spreads wrong messages
C. It makes communication easier D. It's expensive
7. How is mobile payment better than carrying cash
A. It's smoother B. It's heavier
C. It's harder to use D. It's not safe
8. What is a negative effect mentioned
A. Easy communication B. Bad for eyes from too much screen time
C. Convenient shopping D. Fast network
9. What do some people think about social media
A. It's perfect B. It causes more problems than good
C. It's the best invention D. It has no effect
10. What is the key to using digital technology
A. Never use it B. Use it all the time
C. Use it wisely and balance online/offline life D. Only use it for work
四、书面表达（围绕“数字设备的变化”主题，综合运用语法点）
以“How Digital Devices Have Changed”为题，写一篇短文，描述数字设备的变化，至少使用8处形容词比较级/最高级和5处单元词汇。
要求：1. 语言准确，贴合单元主题；2. 词数100-150词。
答案
一、词汇运用
1. network 2. multimedia 3. expert 4. Mobile 5. data 6. laptop 7. screen 8. effect
9. social 10. weight 11. app 12. microchip 13. opinion 14. electronic 15. breakthrough
二、句型转换
1. thinner than 2. lighter than 3. the most expensive 4. as important as
5. smaller than 6. more useful than 7. the fastest 8. longer than 9. brighter than
10. as convenient as 11. better than 12. much lighter than 13. safer than
14. the larger 15. more positive
三、阅读理解
A篇：1. B 2. B 3. B 4. C 5. B
B篇：6. C 7. A 8. B 9. B 10. C
四、书面表达（参考范文）
How Digital Devices Have Changed
Digital devices have become better over time. The first laptops were much heavier than today's—now the lightest ones weigh only 1kg. Screens are brighter and larger than before, making watching videos more enjoyable.
Mobile phones are more powerful than old models. They have better cameras and faster networks. The best part is mobile payment, which is smoother than carrying cash.
Microchips are tinier than in the past, so devices work faster. Social media apps are more popular than emails for communication. These changes show the great breakthroughs in digital technology.