Unit 1The Changing World Exploring the topic 知识点讲解2026-2027学年仁爱科普版英语九年级上册

Unit 1 The Changing World Exploring the topic 课时4&5 第四课时 Theme Reading 1. take…as an example 以……为例 【教材原句】Take my hometown as an example. It has changed a lot. 【讲解】 take…as an example 意为“以……为例”，用来举例说明观点。 同义表达：take…for example；for example（例如）；for instance（例如）。 注意：for example 一般只举一个例子，且前后用逗号隔开；such as 用来列举多个例子。 【例句】 • Take Beijing as an example. It is a city with a long history. 以北京为例，它是一座历史悠久的城市。 • For example, you can start with easy exercises. 例如，你可以从简单的练习开始。 • I like fruits, such as apples, bananas and oranges. 我喜欢水果，比如苹果、香蕉和橙子。 【练习题】 1. 选择：______, water is very important to all living things. A. Such as B. Take as an example C. For example D. As example 答案：C 2. 翻译：以他为例，他每天花两小时学习英语。 答案：Take him as an example. He spends two hours learning English every day. 2. narrow adj. 狭窄的；v.（使）变窄 【教材原句】The streets used to be narrow and dirty. 【讲解】 narrow 作形容词，意为“狭窄的；狭隘的”，反义词为 wide（宽的）或 broad（宽阔的）。 作动词时，意为“（使）变窄；缩小”，常见搭配：narrow down（缩小范围；减少）。 常见搭配：a narrow escape（九死一生；侥幸逃脱）；narrow-minded（心胸狭窄的）。 【例句】 • The river is too narrow for boats to pass. 这条河太窄，船过不去。 • Please narrow down your choices. 请缩小你的选择范围。 • He had a narrow escape from the fire. 他从火灾中侥幸逃脱。 【练习题】 1. 选择：The bridge is too ______ for two cars to pass at the same time. A. wide B. narrow C. long D. short 答案：B 2. 翻译：过去这条街道又窄又脏。 答案：The street used to be narrow and dirty. 3. find out 查明；弄清楚 【教材原句】We need to find out the truth of the matter. 【讲解】 find out 意为“查明；弄清楚”，指经过观察、调查、思考后查明事实或真相。 辨析：find 意为“找到；发现”，强调找到的结果；look for 意为“寻找”，强调寻找的动作；find out 意为“查明；弄清楚”，强调经过努力获知信息。 find out 是及物动词短语，可接宾语从句。 【例句】 • Please find out when the train leaves. 请查一下火车什么时候开。 • I looked for my pen everywhere, but I couldn't find it. 我到处找钢笔，但没找到。 • We finally found out who broke the window. 我们最终查明了是谁打破了窗户。 【练习题】 1. 选择：I will ______ who is right. A. find B. find out C. look for D. discover 答案：B 2. 用find/look for/find out填空：Can you help me ______ my lost keys? 答案：look for 4. block n. 街区；大块；大楼 【教材原句】Go two blocks and turn left at the corner. 【讲解】 block 作名词，意为“街区；大块；大楼；障碍物”。 常见搭配：a block of（一块/一大块）；office block（办公大楼）；building block（积木；基础要素）。 作动词时，意为“阻塞；阻挡”，常见搭配：block the road（堵塞道路）；block one's view（挡住视线）。 【例句】 • The bank is just two blocks away. 银行就在两个街区之外。 • There is a block of ice on the road. 路上有一大块冰。 • The fallen tree blocked the road. 倒下的树堵住了道路。 【练习题】 1. 选择：Walk one ______ and you will see the bookstore. A. block B. house C. room D. area 答案：A 2. 翻译：一大块石头挡住了去路。 答案：A big block of stone blocked the way. 5. improvement n. 改进；改善 【教材原句】There has been a great improvement in people's living conditions. 【讲解】 improvement 是名词，意为“改进；改善；改进之处”，可作可数或不可数名词。 常见搭配：make improvements（进行改进）；improvement in（在……方面的改善）；room for improvement（改进的空间）。 动词形式为 improve，意为“改善；提高；改进”，可作及物或不及物动词。 【例句】 • Your writing has shown great improvement. 你的写作有了很大进步。 • We need to improve our service. 我们需要改善服务。 • There is still room for improvement in your work. 你的工作还有改进的空间。 【练习题】 1. 用所给词适当形式填空：The government has made great ______ (improve) in education. 答案：improvements 2. 翻译：人们的生活条件有了很大改善。 答案：There has been a great improvement in people's living conditions. 6. in any case 无论如何；不管怎样 【教材原句】In any case, we must finish the work on time. 【讲解】 in any case 意为“无论如何；不管怎样”，相当于 anyway / at all events。 拓展短语：in that case（既然那样；在那种情况下）；in no case（决不，置于句首时句子要部分倒装）；in case（以防；万一）；in case of（万一；如果发生）。 【例句】 • In any case, you should tell the truth. 无论如何，你应该说实话。 • In that case, I have nothing to say. 既然那样，我无话可说。 • In no case should you give up. 你决不应该放弃。（倒装） 【练习题】 1. 选择：______, we must try our best. A. In case B. In any case C. In that case D. In no case 答案：B 2. 翻译：无论如何，我都会支持你。 答案：In any case, I will support you. 7. keep up with 跟上；了解消息；保持联系 【教材原句】We must keep up with the times. 【讲解】 keep up with 意为“跟上；赶上；了解（最新消息）；与……保持联系”。 常见搭配：keep up with the times（跟上时代）；keep up with the Joneses（与人攀比）；keep up with current events（了解时事）。 反义短语：fall behind（落后）。 辨析：keep up with 强调“跟上（不落后）”；catch up with 强调“追上（从后面赶上）”。 【例句】 • She works hard to keep up with her classmates. 她努力学习以跟上同学们。 • I like reading newspapers to keep up with the news. 我喜欢读报以了解新闻。 • He walked so fast that I couldn't catch up with him. 他走得太快，我追不上。 【练习题】 1. 选择：We should study hard to ______ the times. A. keep up with B. come up with C. put up with D. end up with 答案：A 2. 翻译：为了不落后，我们必须不断学习。 答案：In order not to fall behind, we must keep learning. 第五课时 Grammar in Use 1. 后缀 -ment：动词变名词 【教材原句】The development of technology has changed our life. 【讲解】 后缀 -ment 加在动词后面，构成名词，表示动作、过程或结果。 直接加 -ment：develop → development（发展）；arrange → arrangement（安排）；move → movement（运动）；agree → agreement（同意）。 以不发音的 e 结尾的动词，去 e 加 -ment：argue → argument（争论）。 其他常见词：improve → improvement（改善）；achieve → achievement（成就）；govern → government（政府）；treat → treatment（治疗）。 【例句】 • The government has taken measures to protect the environment. 政府已采取措施保护环境。 • We reached an agreement after a long discussion. 经过长时间讨论我们达成了协议。 • He received good treatment in hospital. 他在医院得到了很好的治疗。 【练习题】 1. 用所给词适当形式填空：The ______ (develop) of the city is amazing. 答案：development 2. 写出动词对应的名词：agree → ______；improve → ______ 答案：agreement; improvement 2. 现在完成时（Ⅰ）：结构与基本用法 【教材原句】I have already finished my homework. 【讲解】 现在完成时结构：主语 + have/has + 过去分词（done）。 肯定句：I have seen the film. / She has gone to Beijing. 否定句：主语 + have/has + not + 过去分词。I haven't seen him recently. 一般疑问句：Have/Has + 主语 + 过去分词？— Yes, I have. / No, I haven't. 基本用法：①表示过去发生的动作对现在造成的影响或结果；②表示从过去开始持续到现在的动作或状态。 标志词：already（已经，肯定句）；yet（还，否定/疑问句）；just（刚刚）；ever（曾经）；never（从不）；before（以前）；recently（最近）；so far（到目前为止）。 【例句】 • I have already read this book. 我已经读过这本书了。（现在知道内容） • Have you ever been to Shanghai? 你曾经去过上海吗？ • She hasn't come back yet. 她还没回来。 【练习题】 1. 用所给词适当形式填空：I ______ already ______ (finish) my homework. 答案：have; finished 2. 改为一般疑问句：He has lived here for ten years. → ______ ______ ______ here for ten years? 答案：Has he lived 1 学科网（北京）股份有限公司 $