暑假自学课第12讲 Unit 4 Digital life 语法练习（讲义）-2026-2027学年外研版英语八年级上册

新初二暑假自学课 外研2024版 · 暑假衔接专用 ┌─────────────────────────────┐ 第12讲 Unit 4 Digital life — 语法练习 └─────────────────────────────┘ ⊙ 适用年级：新八年级（七升八） ⊙ 教材版本：外研2024版 ⊙ 内容说明：巩固现在完成时与already/yet/ever/never的搭配，辨析现在完成时与一般过去时的区别 Part 1 温故知新 —— 现在完成时回顾 一、现在完成时的构成 主语 + have/has + 过去分词 句式 结构 例句 肯定 have/has + 过去分词 I have seen this film. 否定 haven't/hasn't + 过去分词 She hasn't come yet. 疑问 Have/Has + 主语 + 过去分词? Have you ever been to Beijing? 简短回答 Yes, ... have/has. / No, ... haven't/hasn't. Yes, I have. / No, I haven't. 二、不规则动词过去分词复习 原形 过去式 过去分词 see saw seen be was/were been go went gone do did done eat ate eaten write wrote written 三、热身——完成句子 1. I ______ (see) this film before. 2. She ______ (not, finish) her homework yet. 3. ______ you ever ______ (be) to Shanghai? 4. They ______ (already, arrive) at the airport. 5. He ______ (just, leave). Part 2 习新知法 —— 现在完成时副词精讲 现在完成时常与以下副词连用，表达更精确的时间含义。这是本单元的重点语法！ 一、already / yet “已经”与“还” 副词 用法 例句 already 肯定句（已发生） I have already finished my work. already 疑问句（表惊讶） Have you already finished? So fast! yet 否定句（还没） I haven't finished my work yet. yet 疑问句（已经？） Have you finished your work yet? already / yet 练习：用 already 或 yet 填空 1. I have ______ had breakfast. I'm not hungry. 2. She hasn't come back ______. 3. Have you finished your homework ______? 4. He has ______ left. You can't catch up with him. 5. — Have you ______ heard the news? — No, not ______. 二、ever / never “曾经”与“从未” 副词 用法 例句 ever 疑问句（曾经） Have you ever been to the Great Wall? never 否定句（从未） I have never been to the Great Wall. ever 肯定句中的特殊搭配 This is the best film I have ever seen. ever / never 练习：用 ever 或 never 填空 1. Have you ______ eaten Beijing duck? 2. I have ______ been to the USA, but I hope to go one day. 3. She has ______ lied to me. She is always honest. 4. Is this the first time you have ______ seen snow? 5. This is the most interesting book I have ______ read. 三、just / before “刚刚”与“以前” 副词 用法 例句 just 肯定句（刚刚） I have just finished lunch. before 句尾（以前） I have seen this film before. just now 一般过去时（刚才） I saw him just now.（不用现在完成时） 注意：just now（刚才）只能用一般过去时，不能用现在完成时！ just / before 练习：用 just 或 before 填空 1. He has ______ arrived at the station. 2. I have never been to this place ______. 3. She has ______ left for school. 4. We have met ______, haven't we? 四、现在完成时 vs 一般过去时——核心区别 这是八年级最重要的时态辨析之一！ 对比点 现在完成时 一般过去时 侧重点 强调过去与现在的联系 强调过去某时发生的事情 时间状语 already, yet, ever, never, just, before, since, for yesterday, last night, ...ago, in 2020, just now 例句 I have seen this film.（谈感受/经历） I saw this film yesterday.（谈时间） 例句 She has lived here for 10 years.（仍住这里） She lived here for 10 years.（已搬走） 时态辨析练习：用所给词的适当形式填空（注意用现在完成时还是一般过去时） 1. I ______ (see) this movie last week. 2. She ______ (already, finish) her homework. 3. ______ you ever ______ (be) to the Great Wall? 4. He ______ (visit) the museum yesterday. 5. We ______ (live) here since 2018. 6. They ______ (buy) a new house last year. 7. I ______ (just, hear) the good news. 8. She ______ (not, come) back yet. 9. He ______ (go) to Beijing last month. 10. I never ______ (eat) such delicious food before. 五、科技话题中的比较级——discuss advantages and disadvantages 在讨论科技话题时，常需要用比较级来对比不同的选择： 句型 例句 A is + 比较级 + than B Online shopping is more convenient than going to stores. A is the + 最高级 + of/in... Smartphones are the most useful invention of our time. A is as + 原级 + as B This app is as useful as that one. A is not as/so + 原级 + as B Paying with cash is not as convenient as mobile payment. The + 比较级, the + 比较级 The faster technology develops, the better our lives become. Part 3 基础巩固 —— 综合语法练习（不附答案） 一、单项选择 1. I have ______ been to Beijing. I hope to go there one day. A. ever B. never C. already D. just 2. Have you finished your homework ______? A. already B. yet C. ever D. just 3. She has ______ left. You can catch up with her. A. yet B. just C. never D. ever 4. I ______ this film last night. A. have seen B. saw C. see D. will see 5. This is the most beautiful place I ______ ever ______. A. have; been B. have; been to C. have; gone D. did; go 6. He has lived in Shanghai ______ 2018. A. for B. since C. in D. at 7. Online shopping is ______ than shopping in stores. A. convenient B. more convenient C. most convenient D. the most convenient 8. I saw him ______. A. already B. just now C. just D. ever 9. ______ you ever ______ to Shanghai Disneyland? A. Did; go B. Have; been C. Have; gone D. Do; go 10. She hasn't come back ______. A. already B. just C. yet D. ever 二、用所给词的适当形式填空 1. I ______ (never, be) to the USA. 2. She ______ (already, finish) her work. 3. ______ you ______ (see) that film yet? 4. He ______ (just, arrive) at the station. 5. They ______ (buy) a new house last year. 6. We ______ (live) in this city since 2020. 7. I ______ (not, eat) anything since breakfast. 8. She ______ (go) to Beijing last week. 9. Smartphones are ______ (useful) than traditional phones. 10. This is the ______ (good) movie I have ever seen. 三、按要求改写句子 1. I have finished my homework.（改为否定句） I ______ ______ my homework ______. 2. She has visited the Great Wall.（改为一般疑问句） ______ she ______ the Great Wall? 3. I saw this film yesterday.（改为现在完成时） I ______ ______ this film before. 4. He went to Beijing last month.（对划线部分提问） When ______ he ______ to Beijing? 5. They have lived here for ten years.（对划线部分提问） ______ ______ have they lived here? Part 4 提高挑战 —— 语法综合运用（不附答案） 一、完形填空——数字生活中的时态运用 I ______ (have) a smartphone for three years. I ______ (use) it every day. I ______ (download) many apps on it. Some of them are very useful. I ______ (just, buy) a new app for learning English. It is ______ (helpful) than I expected. My parents ______ (buy) me the phone as a birthday gift. I ______ (never, spend) too much time on games. I know I should use it wisely. Technology ______ (change) our lives greatly. (1) A. have had B. have C. has had D. had (2) A. used B. use C. have used D. am using (3) A. have download B. have downloaded C. downloaded D. download (4) A. has just bought B. just bought C. have just bought D. just buy (5) A. helpful B. more helpful C. most helpful D. the most helpful (6) A. buy B. have bought C. bought D. will buy (7) A. have never spent B. never spent C. didn't spend D. don't spend (8) A. changed B. has changed C. will change D. is changing 二、阅读理解——时态判断 Smartphones have changed the way we live. In the past, people used phones only for calling and sending messages. Now, smartphones can do almost everything. People have used smartphones for shopping, learning and entertainment. I have had my smartphone for two years. It has helped me a lot. However, some people have spent too much time on their phones. We should use smartphones wisely. 1. What did people use phones for in the past? A. Shopping and learning. B. Calling and sending messages. C. Playing games. D. Watching videos. 2. How long has the writer had his/her smartphone? A. For one year. B. For two years. C. For three years. D. For five years. 3. Which sentence uses the present perfect tense? A. Smartphones have changed the way we live. B. In the past, people used phones only for calling. C. I got my smartphone two years ago. D. We should use smartphones wisely. 4. The main idea of the passage is that ______. A. smartphones are expensive B. we should not use smartphones C. smartphones have changed our lives and should be used wisely D. smartphones are only for young people 三、翻译句子 1. 你有过网上购物的经历吗？ ______ you ever ______ online? 2. 我已经用这个手机两年了。 I ______ ______ this smartphone for two years. 3. 他还没回来。 He hasn't come back ______. 4. 这是我吃过的最好吃的菜。 This is the ______ delicious dish I have ever ______. 5. 线上购物比去实体店更方便。 Online shopping is ______ ______ than going to physical stores. Part 5 本讲总结 现在完成时——副词用法速查 already “已经”（肯定句 / 疑问句表惊讶） yet “已经/还”（疑问句 / 否定句） ever “曾经”（疑问句） never “从未”（否定含义） just “刚刚”（肯定句） before “以前”（句尾） 参考答案 Part 1 温故知新 — 热身练习 1. have seen 2. hasn't finished 3. Have; been 4. have already arrived 5. has just left Part 2 习新知法 — 当堂练习 already/yet 1. already 2. yet 3. yet 4. already 5. already; yet ever/never 1. ever 2. never 3. never 4. ever 5. ever just/before 1. just 2. before 3. just 4. before 时态辨析 1. saw 2. has already finished 3. Have; been 4. visited 5. have lived 6. bought 7. have just heard 8. hasn't come 9. went 10. have eaten Part 3 基础巩固 一、单项选择 1. B 2. B 3. B 4. B 5. B 6. B 7. B 8. B 9. B 10. C 二、用所给词填空 1. have never been 2. has already finished 3. Have; seen 4. has just arrived 5. bought 6. have lived 7. haven't eaten 8. went 9. more useful 10. best 三、句型转换 1. haven't finished; yet 2. Has; visited 3. have seen 4. did; go 5. How long Part 4 提高挑战 一、完形填空 1. A 2. B 3. B 4. C 5. B 6. C 7. A 8. B 二、阅读理解 1. B 2. B 3. A 4. C 三、翻译 1. Have; shopped 2. have had 3. yet 4. most; eaten 5. more convenient 学科网（北京）股份有限公司 $