Unit 1 A Changing World单元知识总结及重点易错专项训练2026-2027学年仁爱科普版英语九年级上册

**基本信息** 该专项聚焦九年级Unit 1核心语法现在完成时，以十大易错考点为纲，通过基础-提升-拓展三级训练（90题）系统构建知识网络，强化语言能力与思维品质。 **专项设计** |模块|题量/典例|方法提炼|知识逻辑| |----|-----------|----------|----------| |十大易错考点|10考点×9题（基础/提升/拓展各3）|现在完成时结构、标志词位置、have been to/gone to/been in辨析等|从语法规则（结构/标志词）到易混点（现完与一般过去时/非延续动词转换），层层递进|

（仁爱科普版）九年级上册 Unit 1 A Changing World 单元知识总结及重点易错专项训练 ■ ■ ■ ■ ■ ■ ■ 说明：本练习紧扣最新教材精选 10 个重点易错考点，每个考点含基础题×3、提升题×3、拓展题×3，共 90 题。 一、重点单词 already adv. 已经 yet adv. 还；仍然；已经 ever adv. 曾经 never adv. 从不；从未 just adv. 刚刚；刚才 since prep./conj. 自从 for prep. 达；计（接时间段） change v./n. 改变；变化 improve v. 改善；提高 environment n. 环境 population n. 人口 increase v. 增长；增加 realize v. 意识到；实现 modern adj. 现代的 communication n. 交流；通讯 satisfy v. 使满意 medical adj. 医学的 treatment n. 治疗 discover v. 发现 disease n. 疾病 government n. 政府 develop v. 发展 rapidly adv. 迅速地 technology n. 科技 transport n. 交通 condition n. 条件；状况 return v. 返回 village n. 村庄 hometown n. 家乡 provide v. 提供 二、重点短语 take place —— 发生 change a lot —— 变化很大 in the past —— 在过去 since then —— 从那时起 so far —— 到目前为止 with the help of —— 在……的帮助下 make progress —— 取得进步 learn about —— 了解；得知 be happy about —— 对……感到高兴 the population of —— ……的人口 one third —— 三分之一 because of —— 因为；由于 all over the world —— 全世界 be used to —— 习惯于 deal with —— 处理；应对 communicate with —— 与……交流 provide...with —— 为……提供 in order to —— 为了 such as —— 例如 over the years —— 这些年来 三、重点句型 Great changes have taken place in my hometown. 我的家乡发生了巨大的变化。 Have you ever been to Xiamen? 你曾经去过厦门吗？ The population of China is about 1.4 billion. 中国的人口大约是14亿。 I have lived here since 2010. 自从2010年我就住在这里。 We have known each other for three years. 我们彼此认识三年了。 The city has changed a lot over the years. 这些年来这座城市变化很大。 They have already finished their work. 他们已经完成了工作。 Has she ever visited Qingdao? 她曾经去过青岛吗？ We have learned about the changes in our country. 我们已经了解了我们国家的变化。 It is important to protect the environment. 保护环境很重要。 四、重点语法 一、现在完成时基本结构：have/has + 过去分词。第三人称单数用 has，其余用 have。 二、标志词：already（肯定句，句中/句末）、yet（否定/疑问句，句末）、ever/never/just 等。 三、have been to（去过已回）/ have gone to（去了未回）/ have been in（待在某地一段时间）。 四、since + 时间点 / 过去句子；for + 时间段。两者均须搭配延续性动词。 五、现在完成时 vs 一般过去时：前者强调对现在的影响或与现在相关的经历；后者只谈过去动作。 六、非延续性动词（buy, die, leave, begin 等）不能直接接时间段，须转换为延续性表达。 七、形容词/副词比较级：more and more + 原级（多音节），或 -er and -er（单音节），表示“越来越……”。 八、人口表达：What's the population of...? 用 large/small 修饰，不用 many/much。 九、动词短语辨析：take place（发生，无被动）/ happen（发生）/ take part in（参加）。 十、现在完成时疑问句及简答：Have/Has + 主语 + 过去分词？答：Yes, 主语 + have/has. / No, 主语 + haven't/hasn't. 十大易错考点一览 考点一：现在完成时结构及 have/has 与主语一致：have/has + 过去分词；第三人称单数用 has，并列/复数用 have 考点二：标志词 already / yet / ever / never / just 的位置：already 用于肯定句（句中/句末）；yet 用于否定/疑问句句末；ever 疑问、never 否定 考点三：have been to / gone to / been in 辨析：been to 去过已回；gone to 去了未回；been in 待在某地一段时间 考点四：since 与 for 的用法：since + 时间点/过去句子；for + 时间段，均须接延续性动词 考点五：现在完成时与一般过去时的区别：现完强调与现在的联系/经历；一般过去时只表过去动作，常带过去时间 考点六：非延续性动词与时间段转换：buy→have, die→be dead, leave→be away, begin→be on 等，才能接时间段 考点七：形容词/副词比较级（越来越……）：多音节用 more and more；单音节用 -er and -er 考点八：人口表达：What's the population of...? 用 large/small 修饰，不用 many/much；回答用 it 考点九：动词短语辨析（take place / happen / take part in）：take place 按计划发生（无被动）；happen 偶然发生；take part in 参加活动 考点十：现在完成时疑问句及简答：Have/Has + 主语 + 过去分词？简答：Yes, 主语+have/has. / No, 主语+haven't/hasn't. 考点一：现在完成时结构及 have/has 与主语一致 基础题：（选择题） ◇（ ）1. Olivia ______ already finished her homework.　A. has　B. have　C. is　D. does ◇（ ）2. Chen Wei and I ______ known each other for years.　A. has　B. have　C. is　D. are ◇（ ）3. Look! The bus ______ just left.　A. have　B. has　C. had　D. having 提升题：（选择题） ▷（ ）1. Neither of the twins ______ been to Xiamen.　A. have　B. has　C. is　D. are ▷（ ）2. Each of the students ______ read the book.　A. have　B. has　C. are　D. do ▷（ ）3. My parents ______ lived in Wuhan since 2005.　A. has　B. have　C. is　D. was 拓展题：（选择题） ★（ ）1. The number of the books ______ increased a lot.　A. have　B. has　C. are　D. do ★（ ）2. They ______ already made great progress this term.　A. has　B. have　C. is　D. are ★（ ）3. One of my friends ______ just called me.　A. have　B. has　C. are　D. do 考点二：标志词 already / yet / ever / never / just 的位置 基础题：（选择题） ◇（ ）1. I have ______ visited Qingdao. It is beautiful.　A. yet　B. already　C. never　D. ever ◇（ ）2. Have you finished your work ______?　A. already　B. ever　C. yet　D. just ◇（ ）3. She hasn't come back ______.　A. already　B. yet　C. just　D. ever 提升题：（选择题） ▷（ ）1. — Have you ______ been to Kunming? — No, never.　A. yet　B. already　C. ever　D. just ▷（ ）2. I have ______ seen such a big change before.　A. never　B. yet　C. already　D. ever ▷（ ）3. He has ______ arrived. Let's go!　A. yet　B. just　C. ever　D. never 拓展题：（选择题） ★（ ）1. We have ______ learned about the changes in our country.　A. just　B. yet　C. ever　D. already ★（ ）2. ______ have you ______ heard of this city?　A. Ever; /　B. Yet; ever　C. Just; never　D. Never; already ★（ ）3. She has ______ been to Jinan, so she knows little about it.　A. already　B. ever　C. never　D. just 考点三：have been to / gone to / been in 辨析 基础题：（选择题） ◇（ ）1. — Where is Lily? — She has ______ to the library.　A. been　B. gone　C. went　D. go ◇（ ）2. I have ______ to Xiamen twice. It's lovely.　A. gone　B. been　C. went　D. go ◇（ ）3. He has ______ in Wuhan for ten years.　A. gone　B. been　C. went　D. go 提升题：（选择题） ▷（ ）1. The Greens have ______ Qingdao for a week.　A. gone to　B. been to　C. been in　D. went to ▷（ ）2. — Is Olivia at home? — No, she has ______ to the park.　A. been　B. gone　C. been in　D. go ▷（ ）3. We have ______ to Kunming and we took many photos.　A. gone　B. been　C. went　D. go 拓展题：（选择题） ★（ ）1. My uncle has ______ Jinan since last month. He is busy there.　A. gone to　B. been to　C. been in　D. went to ★（ ）2. — Where are the children? — They have ______ to the playground.　A. been　B. gone　C. been in　D. went ★（ ）3. Chen Wei has ______ to many cities, but he likes Wuhan best.　A. gone　B. been　C. went　D. go 考点四：since 与 for 的用法 基础题：（选择题） ◇（ ）1. I have lived here ______ 2010.　A. for　B. since　C. in　D. on ◇（ ）2. She has learned English ______ three years.　A. for　B. since　C. in　D. on ◇（ ）3. He has been a teacher ______ he left school.　A. for　B. in　C. since　D. on 提升题：（选择题） ▷（ ）1. We have known each other ______ we were children.　A. since　B. for　C. in　D. at ▷（ ）2. The city has changed a lot ______ the past ten years.　A. since　B. in　C. for　D. on ▷（ ）3. Zhang Hao has studied in this school ______ last September.　A. for　B. since　C. in　D. on 拓展题：（选择题） ★（ ）1. Great changes have taken place in my hometown ______ I was born.　A. for　B. in　C. since　D. at ★（ ）2. They have waited ______ over two hours. Let's hurry.　A. for　B. since　C. from　D. by ★（ ）3. Bella has kept this book ______ last Monday.　A. for　B. since　C. in　D. on 考点五：现在完成时与一般过去时的区别 基础题：（选择题） ◇（ ）1. I ______ to Xiamen last summer.　A. have been　B. went　C. have gone　D. go ◇（ ）2. ______ you ever ______ a horse?　A. Did; ride　B. Have; ridden　C. Do; ride　D. Are; riding ◇（ ）3. He ______ the book yesterday.　A. has finished　B. finished　C. have finished　D. finishes 提升题：（选择题） ▷（ ）1. — ______ you ______ the film? — Yes, I saw it last week.　A. Have; seen　B. Did; see　C. Do; see　D. Are; seeing ▷（ ）2. She ______ in Qingdao in 2020. Now she lives here.　A. has lived　B. lived　C. have lived　D. lives ▷（ ）3. Olivia ______ already read the story, so she knows it well.　A. reads　B. read　C. has　D. have 拓展题：（选择题） ★（ ）1. We ______ each other for a long time, but we met first in Wuhan.　A. have known; /　B. knew; have met　C. have known; met　D. know; meet ★（ ）2. ______ the train ______? — Yes, it left five minutes ago.　A. Has; left　B. Did; leave　C. Does; leave　D. Is; leaving ★（ ）3. I ______ just ______ my keys, but I can't find them now.　A. have; lost　B. lost　C. lose　D. was losing 考点六：非延续性动词与时间段转换 基础题：（选择题） ◇（ ）1. Chen Wei ______ the book for two weeks.　A. has bought　B. has had　C. bought　D. buys ◇（ ）2. The old man ______ for ten years.　A. has died　B. died　C. has been dead　D. dies ◇（ ）3. She ______ from Jinan since 2018.　A. has been away　B. has left　C. left　D. leaves 提升题：（选择题） ▷（ ）1. The meeting ______ for half an hour.　A. has begun　B. began　C. has been on　D. begins ▷（ ）2. Zhang Hao ______ the bike since last month.　A. has had　B. has bought　C. bought　D. buys ▷（ ）3. The film ______ for ten minutes when we got there.　A. has been on　B. had been on　C. has begun　D. began 拓展题：（选择题） ★（ ）1. My grandfather ______ the village for over sixty years.　A. has left　B. left　C. has been away from　D. leaves ★（ ）2. Lily ______ the job since she graduated.　A. has had　B. has started　C. started　D. starts ★（ ）3. The shop ______ closed for a week. It will open soon.　A. has closed　B. has been　C. closed　D. closes 考点七：形容词/副词比较级（越来越……） 基础题：（选择题） ◇（ ）1. Our city is becoming ______ beautiful.　A. more and more　B. much and much　C. many and many　D. most and most ◇（ ）2. The weather is getting ______ warm these days.　A. more and more warm　B. warmer and warmer　C. warm and warm　D. warmest ◇（ ）3. He is running ______ (fast).　A. more and more fast　B. faster and faster　C. fast and fast　D. most fast 提升题：（选择题） ▷（ ）1. Life in Kunming is ______ comfortable.　A. more and more　B. much and much　C. many and many　D. most and most ▷（ ）2. The boy is growing ______ (tall).　A. more and more tall　B. taller and taller　C. tall and tall　D. tallest ▷（ ）3. Students are ______ interested in science.　A. more and more　B. much and much　C. many and many　D. most and most 拓展题：（选择题） ★（ ）1. As technology develops, life is ______ convenient.　A. more and more　B. much and much　C. many and many　D. most and most ★（ ）2. The population is getting ______ (large).　A. more and more large　B. larger and larger　C. large and large　D. largest ★（ ）3. The environment is ______ important to us.　A. more and more　B. much and much　C. many and many　D. most and most 考点八：人口表达 基础题：（选择题） ◇（ ）1. — ______ the population of Xiamen? — About 5 million.　A. What's　B. How many is　C. How much is　D. Which is ◇（ ）2. The population of Jinan is very ______.　A. many　B. much　C. large　D. few ◇（ ）3. ______ the population of Kunming large or small?　A. Is　B. Does　C. Has　D. Are 提升题：（选择题） ▷（ ）1. The population of Qingdao ______ increasing rapidly.　A. are　B. is　C. have　D. do ▷（ ）2. — What's the population of Wuhan? — ______ about 13 million.　A. They are　B. It is　C. There is　D. We are ▷（ ）3. A ______ population needs more resources.　A. large　B. many　C. much　D. few 拓展题：（选择题） ★（ ）1. The population of Xiamen is not as ______ as that of Wuhan.　A. large　B. many　C. much　D. few ★（ ）2. ______ the population of your city ______ in the past ten years?　A. Has; increased　B. Did; increase　C. Is; increasing　D. Does; increase ★（ ）3. A small population ______ easier to feed.　A. are　B. is　C. have　D. do 考点九：动词短语辨析（take place / happen / take part in） 基础题：（选择题） ◇（ ）1. Great changes have ______ in my hometown.　A. taken place　B. taken part in　C. happened to　D. been taken place ◇（ ）2. We will ______ the sports meeting next week.　A. take place　B. take part in　C. happen　D. take the place ◇（ ）3. An accident ______ on the road yesterday.　A. took place　B. took part in　C. happened　D. was happened 提升题：（选择题） ▷（ ）1. The meeting will ______ at 3 p.m. as planned.　A. happen　B. take part in　C. take place　D. take the place ▷（ ）2. Olivia will ______ the English contest.　A. take place　B. take part in　C. happen　D. be taken place ▷（ ）3. What ______ to Chen Wei? He looks sad.　A. took place　B. took part in　C. happened　D. takes part in 拓展题：（选择题） ★（ ）1. The school sports day ______ every autumn.　A. is taken place　B. takes part in　C. takes place　D. is happened ★（ ）2. Many students ______ the clean-up activity in Kunming.　A. took place　B. took part in　C. happened　D. were taken place ★（ ）3. A wonderful concert ______ in the park last night.　A. was taken place　B. took part in　C. took place　D. happened to 考点十：现在完成时疑问句及简答 基础题：（选择题） ◇（ ）1. — Have you ever been to Qingdao? — ______, I ______.　A. Yes; have　B. Yes; do　C. No; have　D. Yes; am ◇（ ）2. — Has Lily finished? — No, she ______.　A. hasn't　B. haven't　C. isn't　D. doesn't ◇（ ）3. — ______ they visited Wuhan? — Yes, they have.　A. Do　B. Did　C. Have　D. Are 提升题：（选择题） ▷（ ）1. — Has Zhang Hao ever read this book? — ______, he ______.　A. No; has　B. No; hasn't　C. Yes; hasn't　D. No; have ▷（ ）2. — ______ Olivia lived here long? — Yes, she has.　A. Do　B. Does　C. Has　D. Is ▷（ ）3. — Have we known each other for years? — Yes, ______.　A. we have　B. we do　C. we are　D. we did 拓展题：（选择题） ★（ ）1. — Has the train arrived ______? — No, ______.　A. yet; it hasn't　B. already; it has　C. yet; it has　D. already; it hasn't ★（ ）2. — ______ you and Chen Wei finished the work? — Yes, ______.　A. Has; we have　B. Have; we have　C. Do; we do　D. Are; we are ★（ ）3. — Has Bella been to Jinan? — ______, she ______. She went last month.　A. No; has　B. Yes; hasn't　C. Yes; has　D. No; hasn't 参考答案（速查） 考点一：ABBBBBBBB 考点二：BCBCABDAC 考点三：BBBCBBCBB 考点四：BACACBCAB 考点五：BBBABBCBA 考点六：BCACABCAB 考点七：ABBABAABA 考点八：ACABBAAAB 考点九：ABCCBCCBC 考点十：AACBCAABC 详细解析 考点一：现在完成时结构及 have/has 与主语一致 【基础题】 1. 【答案】A　主语 Olivia 是第三人称单数，现在完成时助动词用 has。 2. 【答案】B　Chen Wei and I 是两个人，复数主语，助动词用 have。 3. 【答案】B　主语 the bus 是单数，助动词用 has。 【提升题】 1. 【答案】B　neither of 作主语时谓语用单数，助动词用 has。 2. 【答案】B　each of 作主语谓语用单数，现在完成时助动词用 has。 3. 【答案】B　my parents 是复数，助动词用 have。 【拓展题】 1. 【答案】B　the number of 作主语时谓语用单数，助动词用 has。 2. 【答案】B　They（they）是复数代词，助动词用 have。 3. 【答案】B　one of... 作主语谓语用单数，助动词用 has。 考点二：标志词 already / yet / ever / never / just 的位置 【基础题】 1. 【答案】B　肯定句中表示“已经”用 already。 2. 【答案】C　疑问句句末表示“还/已经”用 yet。 3. 【答案】B　否定句句末用 yet 表示“还（没）”。 【提升题】 1. 【答案】C　疑问句询问“曾经”去过用 ever。 2. 【答案】A　否定意义“从未”用 never。 3. 【答案】B　“刚刚到达”用 just。 【拓展题】 1. 【答案】D　肯定句表示“已经了解”用 already。 2. 【答案】A　疑问句用 ever 表示“曾经”，置于助动词后、过去分词前，第二空不填。 3. 【答案】C　“从没去过所以不了解”用 never。 考点三：have been to / gone to / been in 辨析 【基础题】 1. 【答案】B　人不在说话地，“去了图书馆（未回）”用 gone to。 2. 【答案】B　“去过两次（已回）”用 been to。 3. 【答案】B　接 for 时间段表示“待在某地”用 been in。 【提升题】 1. 【答案】C　接 for a week 时间段，表示“在青岛待了一周”用 been in。 2. 【答案】B　人不在家，“去公园未回”用 gone to。 3. 【答案】B　“去过且拍了照（已回）”用 been to。 【拓展题】 1. 【答案】C　since last month 表时间段，“自上个月待在济南”用 been in。 2. 【答案】B　孩子们不在，“去操场（未回）”用 gone to。 3. 【答案】B　“去过许多城市（经历，已回）”用 been to。 考点四：since 与 for 的用法 【基础题】 1. 【答案】B　2010 是时间点，用 since 接时间点。 2. 【答案】A　three years 是时间段，用 for。 3. 【答案】C　since 后可接过去句子（he left school）。 【提升题】 1. 【答案】A　since 接过去句子，表示“自从我们是孩子起”。 2. 【答案】C　the past ten years 是时间段，用 for。 3. 【答案】B　last September 是时间点，用 since。 【拓展题】 1. 【答案】C　since 接过去句子（I was born）。 2. 【答案】A　over two hours 是时间段，用 for。 3. 【答案】B　last Monday 是时间点，用 since。 考点五：现在完成时与一般过去时的区别 【基础题】 1. 【答案】B　last summer 是过去时间状语，用一般过去时 went。 2. 【答案】B　ever 是现完标志，问“曾经”经历用 Have...ridden。 3. 【答案】B　yesterday 是过去时间，用一般过去时 finished。 【提升题】 1. 【答案】A　问是否“看过（经历）”用现完 Have...seen；答语用过去时 saw 补充说明。 2. 【答案】B　in 2020 是过去时间，且动作已结束，用一般过去时 lived。 3. 【答案】B　already 是现完标志，主语单数用 has read；此处 read 为过去分词。 【拓展题】 1. 【答案】C　“认识很久”用现完 have known；“第一次见面在武汉”是过去动作 met。 2. 【答案】B　答语 left five minutes ago 是过去时间，问“火车离开了吗”用一般过去时 Did...leave。 3. 【答案】A　just 是现完标志，强调对现在的影响（现在找不到），用 have lost。 考点六：非延续性动词与时间段转换 【基础题】 1. 【答案】B　buy 是非延续动词，接 for two weeks 须用 have 的现完 has had。 2. 【答案】C　die 非延续，接时间段用 be dead 的现完 has been dead。 3. 【答案】A　leave 非延续，接 since 用 be away 的现完 has been away。 【提升题】 1. 【答案】C　begin 非延续，接时间段用 be on 的现完 has been on。 2. 【答案】A　buy 接 since 时间段须转换为 has had。 3. 【答案】B　“到达时电影已放映十分钟”用过去完成 had been on（be on 表延续）。 【拓展题】 1. 【答案】C　leave 接 for 时间段须用 be away from 的现完 has been away from。 2. 【答案】A　start 非延续，接 since 须转换为 have 的现完 has had。 3. 【答案】B　close 非延续，接 for a week 用 be closed 的现完 has been closed。 考点七：形容词/副词比较级（越来越……） 【基础题】 1. 【答案】A　beautiful 多音节，“越来越美丽”用 more and more beautiful。 2. 【答案】B　warm 单音节，“越来越暖”用 warmer and warmer。 3. 【答案】B　fast 单音节，“越来越快”用 faster and faster。 【提升题】 1. 【答案】A　comfortable 多音节，“越来越舒适”用 more and more comfortable。 2. 【答案】B　tall 单音节，“越来越高”用 taller and taller。 3. 【答案】A　interested 多音节，“越来越感兴趣”用 more and more interested。 【拓展题】 1. 【答案】A　convenient 多音节，“越来越方便”用 more and more convenient。 2. 【答案】B　large 单音节，“越来越大”用 larger and larger。 3. 【答案】A　important 多音节，“越来越重要”用 more and more important。 考点八：人口表达 【基础题】 1. 【答案】A　询问人口用 What's the population of...? 2. 【答案】C　population 用 large/small 修饰，不用 many/much。 3. 【答案】A　population 作主语谓语用单数，用 Is 提问。 【提升题】 1. 【答案】B　population 作主语谓语用单数，现完用 is increasing。 2. 【答案】B　population 用 it 指代回答。 3. 【答案】A　“人口多”用 large population。 【拓展题】 1. 【答案】A　比较级中仍用 large 修饰 population。 2. 【答案】A　询问人口“是否增长”，population 单数用 Has...increased（现完）。 3. 【答案】B　population 单数谓语，用 is。 考点九：动词短语辨析（take place / happen / take part in） 【基础题】 1. 【答案】A　“发生变化”用 take place，无被动语态。 2. 【答案】B　“参加运动会”用 take part in。 3. 【答案】C　“事故偶然发生”用 happen，无被动。 【提升题】 1. 【答案】C　“按计划举行”用 take place。 2. 【答案】B　“参加英语竞赛”用 take part in。 3. 【答案】C　“发生（在某人身上）”用 happen to sb.。 【拓展题】 1. 【答案】C　“学校运动会每年秋季举行”用 takes place，无被动。 2. 【答案】B　“参加清洁活动”用 took part in。 3. 【答案】C　“音乐会举行”用 took place，无被动。 考点十：现在完成时疑问句及简答 【基础题】 1. 【答案】A　现完疑问句简答用 have/has，肯定为 Yes, I have. 2. 【答案】A　主语 she 单数，否定简答用 hasn't。 3. 【答案】C　现完疑问句助动词用 Have（主语 they）。 【提升题】 1. 【答案】B　否定简答为 No, he hasn't. 2. 【答案】C　主语 she 单数，现完疑问用 Has。 3. 【答案】A　现完简答用 we have。 【拓展题】 1. 【答案】A　疑问句句末用 yet；否定简答用 it hasn't。 2. 【答案】B　主语 you and Chen Wei 复数，用 Have；简答 we have。 3. 【答案】C　“去过（上个月去的）”肯定简答 Yes, she has. 学科网（北京）股份有限公司 $