Unit 2 Our Classroom单元知识总结及重点易错（专项训练）-2026-2027学年重大版英语四年级上册

**基本信息** 聚焦教室主题，以10大易错考点为核心，通过基础-提升-拓展三级训练，系统整合词汇、句型与语法，提炼实用解题规则，强化语言运用与思维辨析能力。 **专项设计** |模块|题量/典例|方法提炼|知识逻辑| |----|-----------|----------|----------| |10大易错考点|每考点9题（3基础+3提升+3拓展）|存在句就近原则、方位介词辨析、祈使句动词原形开头等规则|从教室词汇到短语、句型，再到语法（存在句、介词等），最终综合运用，形成“词汇-句法-语用”完整训练链|

重大版 四年级上册 · Unit 2 Our Classroom ｜ 专项训练 重大版 四年级上册 · Unit 2 Our Classroom 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。 ★ 重点单词（必背） classroom 教室，desk 书桌，chair 椅子，window 窗户，door 门，blackboard 黑板，picture 图画，wall 墙壁，floor 地板，computer 电脑，book 书，bag 书包，pen 钢笔，pencil 铅笔，ruler 尺子，eraser 橡皮，clock 时钟，map 地图，light 灯，fan 风扇 ★ 重点短语（必背） clean the blackboard 擦黑板，sweep the floor 扫地，clean the window 擦窗户，clean the desk 擦桌子，put up the picture 张贴图画，turn on the light 开灯，turn off the light 关灯，open the door 开门，close the door 关门，in the classroom 在教室里，on the wall 在墙上，under the desk 在桌子下，near the window 在窗户旁，a new classroom 一间新教室 ★ 重点句型（必背） — Where is the blackboard? 黑板在哪里？ — It's on the wall. 它在墙上。 — Where are the desks? 桌子在哪里？ — They're in the classroom. 它们在教室里。 — Is there a computer in the classroom? 教室里有一台电脑吗？ — Yes, there is. 是的，有。 — Are there any pictures on the wall? 墙上有图画吗？ — No, there aren't. 不，没有。 — What's in the classroom? 教室里有什么？ — There are many desks and chairs. 有许多桌椅。 Let's clean the classroom! 让我们打扫教室吧！ Great! 太棒了！ Please open the window. 请打开窗户。 OK! 好的！ — Can you clean the blackboard? 你会擦黑板吗？ — Yes, I can. 是的，我会。 We should keep our classroom clean. 我们应该保持教室干净。 Don't litter on the floor. 别在地上乱扔垃圾。 ★ 重点语法（必背） ① There is/are... 存在句（is+单数/不可数，are+复数） ② Where is...? — It's + 方位介词 + 地点.（询问单数位置） ③ Where are...? — They're + 方位介词 + 地点.（询问复数位置） ④ 方位介词 in/on/under/near/by/beside 的用法辨析 ⑤ 祈使句：动词原形开头 / Don't... / Please... / Let's... ⑥ 情态动词 can/can't + 动词原形（表能力，无人称变化） ⑦ 名词复数 desks/chairs/windows/pictures/books 变化规则 ⑧ 一般现在时三单 has/cleans/sweeps/opens 变化 ⑨ 频度副词 always/usually/often/sometimes/never 的位置 ⑩ 综合：描述教室物品位置 + 发出指令 + 保持整洁 第二部分：10大易错考点专项训练（共90题） 考点一：There is/are... 存在句（就近原则 & 主谓一致） ◇ 基础题（选择题） ◇（ ）1. There ____ a desk in the classroom. A. is B. are C. am ◇（ ）2. There ____ many chairs in the room. A. is B. are C. am ◇（ ）3. — Is there a computer? — Yes, there ____. A. is B. are C. isn't ▷ 提升题（选择题） ▷（ ）1. There ____ a blackboard and some desks in the room. A. is B. are C. am ▷（ ）2. There ____ some pictures on the wall. A. is B. are C. isn't ▷（ ）3. Which is WRONG? A. There is a desk. B. There are two chairs. C. There is some books. ★ 拓展题（选择题） ★（ ）1. There ____ any windows in the old room. A. isn't B. aren't C. is ★（ ）2. — ____ there a map on the wall? — No, there isn't. A. Is B. Are C. Do ★（ ）3. The rule: 'There ____ some milk in the glass.' A. are B. is C. have 考点二：Where is...? / Where are...? 询问位置（单复数区分） ◇ 基础题（选择题） ◇（ ）1. — Where ____ the blackboard? — It's on the wall. A. is B. are C. am ◇（ ）2. — Where ____ the chairs? — They're near the desks. A. is B. are C. am ◇（ ）3. — Where is the ruler? — ____ under the book. A. It's B. They're C. Is ▷ 提升题（选择题） ▷（ ）1. — Where ____ Olivia's pencil? — It's in her bag. A. is B. are C. do ▷（ ）2. Which answer is RIGHT? A. Where are the desk? B. Where is the desk? C. Where the desk is? ▷（ ）3. — ____ is the computer? — It's on the teacher's desk. A. What B. Where C. How ★ 拓展题（选择题） ★（ ）1. Transform: 'The book is on the desk.' → Question: '____ is the book?' A. What B. Where C. How ★（ ）2. In Xiamen, the teacher asks 'Where ____ the students?' A. is B. are C. am ★（ ）3. Which is RIGHT? A. Where is Jam and Chen Wei? B. Where are Jam and Chen Wei? C. Where am Jam and Chen Wei? 考点三：方位介词 in/on/under/near/beside/behind 辨析 ◇ 基础题（选择题） ◇（ ）1. The book is ____ the desk. (在桌子上面) A. in B. on C. under ◇（ ）2. The ball is ____ the chair. (在椅子下面) A. in B. on C. under ◇（ ）3. The picture is ____ the wall. (在墙上) A. in B. on C. under ▷ 提升题（选择题） ▷（ ）1. The broom is ____ the door. (在门后面) A. behind B. on C. in ▷（ ）2. Which is WRONG? A. The cat is under the table. B. The cat is in the table. C. The cat is on the table. ▷（ ）3. The clock is ____ the wall, ____ the door. A. on; near B. in; on C. under; in ★ 拓展题（选择题） ★（ ）1. The rule: 'in' means ____ something. A. on top of B. inside C. under ★（ ）2. In Wuhan, the teacher says 'Put the book ____ the bag.' A. on B. under C. in ★（ ）3. Olivia sits ____ Jam and Bella. (between) A. between B. among C. beside 考点四：祈使句（动词原形/Don't.../Let's.../Please...） ◇ 基础题（选择题） ◇（ ）1. ____ the blackboard, please. A. Clean B. Cleans C. To clean ◇（ ）2. ____ sweep the floor, Jam. A. Do B. Don't C. Doesn't ◇（ ）3. Let's ____ the classroom together! A. clean B. cleans C. cleaning ▷ 提升题（选择题） ▷（ ）1. Which is WRONG? A. Please open the window. B. Open the window. C. Opens the window. ▷（ ）2. — Let's put up the picture! — ____! A. Not B. Don't C. Great ▷（ ）3. ____ late for school, Chen Wei. A. Don't be B. Not be C. Doesn't be ★ 拓展题（选择题） ★（ ）1. The rule: Imperative sentences start with a ____. A. noun B. verb in original form C. verb+ing ★（ ）2. In Kunming, the teacher says '____ write on the desk.' A. Not B. Don't C. Doesn't ★（ ）3. Transform: 'You must clean the room.' → Imperative: '____ the room.' A. Cleans B. To clean C. Clean 考点五：情态动词 can/can't + 动词原形（表能力，无人称变化） ◇ 基础题（选择题） ◇（ ）1. — Can you clean the window? — Yes, I ____. A. can B. am C. do ◇（ ）2. — Can Jam sweep the floor? — No, he ____. A. can B. can't C. doesn't ◇（ ）3. Olivia ____ reach the blackboard. She is tall. A. can B. can't C. isn't ▷ 提升题（选择题） ▷（ ）1. Which is WRONG? A. She can sings. B. She can sing. C. They can dance. ▷（ ）2. Chen Wei ____ open the window. It's too high. A. can B. can't C. is ▷（ ）3. — ____ can clean the blackboard? — Zhou Kai can. A. What B. Where C. Who ★ 拓展题（选择题） ★（ ）1. The rule: After 'can/can't', the verb must be in ____. A. -s form B. original form C. -ing form ★（ ）2. In Qingdao, the teacher asks '____ you help me, please?' A. Can B. Are C. Do ★（ ）3. Transform: 'She is able to swim.' → Using can: 'She ____ swim.' A. can B. can't C. is 考点六：形容词性物主代词 my/your/his/her/their + 名词 ◇ 基础题（选择题） ◇（ ）1. This is ____ classroom. (我的) A. I B. my C. me ◇（ ）2. — Is this ____ bag, Zhang Hao? — Yes, it's his. (他的) A. she B. his C. hers ◇（ ）3. Jam is cleaning ____ desk now. (他的) A. he B. him C. his ▷ 提升题（选择题） ▷（ ）1. Which is WRONG? A. This is my book. B. This is mine book. C. This is his book. ▷（ ）2. — Is this Olivia's ruler? — Yes, it's ____ ruler. A. her B. hers C. she ▷（ ）3. Chen Wei and Jam clean ____ classroom every day. A. they B. them C. their ★ 拓展题（选择题） ★（ ）1. The rule: Adjective possessive pronouns are followed by a ____. A. pronoun B. noun C. verb ★（ ）2. In Jinan, the teacher says 'Please take out ____ books.' A. you B. your C. yours ★（ ）3. Identify the error: 'This is hers classroom.' A. her B. she C. hers 考点七：名词复数 desks/chairs/windows/pictures/books/boxes 变化规则 ◇ 基础题（选择题） ◇（ ）1. There are many ____ in the classroom. A. desk B. desks C. deskes ◇（ ）2. I can see three ____ on the wall. A. picture B. pictures C. picturees ◇（ ）3. How many ____ are there? A. window B. windows C. windowes ▷ 提升题（选择题） ▷（ ）1. Which is WRONG? A. two books B. three boxs C. four chairs ▷（ ）2. There are some ____ in the pencil box. A. pen B. pens C. pennes ▷（ ）3. Jam has five ____ in his bag. A. eraser B. erasers C. eraseries ★ 拓展题（选择题） ★（ ）1. The rule: For nouns ending in -ch, -sh, -s, -x, add ____ for plural. A. -s B. -es C. -ies ★（ ）2. In Xiamen, students count: 'one brush, two ____.' A. brush B. brushs C. brushes ★（ ）3. Transform: 'a window' (plural) → 'many ____'. A. window B. windows C. windowes 考点八：一般现在时三单变化 has/cleans/sweeps/opens ◇ 基础题（选择题） ◇（ ）1. Chen Wei ____ a new desk. A. have B. has C. is ◇（ ）2. Olivia always ____ the blackboard after class. A. clean B. cleans C. cleaning ◇（ ）3. Jam ____ the floor every morning. A. sweep B. sweeps C. sweeping ▷ 提升题（选择题） ▷（ ）1. Which is WRONG? A. She has a ruler. B. He have a pen. C. It has four legs. ▷（ ）2. Zhou Kai ____ his room on Sunday. A. clean B. cleans C. cleaning ▷（ ）3. — Does Lily ____ the window? — Yes, she does. A. clean B. cleans C. cleaning ★ 拓展题（选择题） ★（ ）1. The rule: For third-person singular, 'have' changes to ____. A. have B. has C. haves ★（ ）2. In Wuhan, the teacher says 'He ____ the door every day.' A. open B. opens C. opening ★（ ）3. Transform: 'I sweep the floor.' → He: 'He ____ the floor.' A. sweep B. sweeps C. sweeping 考点九：频度副词 always/usually/often/sometimes/never 排序与位置 ◇ 基础题（选择题） ◇（ ）1. Olivia ____ cleans the blackboard. (总是) A. sometimes B. never C. always ◇（ ）2. Jam is ____ late for school. (从不) A. always B. never C. usually ◇（ ）3. Chen Wei ____ sweeps the floor after class. (经常) A. often B. never C. always ▷ 提升题（选择题） ▷（ ）1. Which order is RIGHT? (from high to low frequency) A. always > often > sometimes > never B. never > sometimes > often > always C. sometimes > always > often > never ▷（ ）2. Bella ____ helps her classmates. She is very helpful. A. never B. always C. hardly ▷（ ）3. I ____ eat in the classroom because it's not allowed. A. always B. often C. never ★ 拓展题（选择题） ★（ ）1. The rule: Frequency adverbs are placed ____ the main verb. A. before B. after C. between ★（ ）2. In Xiamen, students say 'We ____ do homework together.' A. often B. are C. be ★（ ）3. Transform: 'She sometimes reads.' → More frequent: 'She ____ reads.' A. never B. always C. sometimes 考点十：综合辨析（教室物品位置+指令+频度+保持整洁全流程） ◇ 基础题（选择题） ◇（ ）1. — What's in the classroom? — ____ many desks and chairs. A. There is B. There are C. It is ◇（ ）2. Please ____ the window. It's hot inside. A. open B. opens C. to open ◇（ ）3. — ____ is the picture? — It's on the wall. A. What B. Where C. How ▷ 提升题（选择题） ▷（ ）1. Read and choose: 'There are some books ____ the desk. Please put ____ in the bag.' A. on; them B. in; it C. under; they ▷（ ）2. Which is the BEST order? ①Clean the blackboard. ②Open the door. ③Sweep the floor. A. ②→①→③ B. ③→②→① C. ①→③→② ▷（ ）3. — Can you help me clean the classroom? — ____! A. Sorry B. Sure C. No ★ 拓展题（选择题） ★（ ）1. In Qingdao, the teacher describes the classroom. Which sentence is WRONG? A. There is a blackboard on the wall. B. The desks is clean. C. We keep our classroom tidy. ★（ ）2. Transform to a suggestion: 'We clean the classroom.' → '____ clean the classroom!' A. Let's B. Don't C. Not ★（ ）3. Best title for a classroom rules poster: ____. A. My Family B. Keep Our Classroom Clean and Tidy C. My School Day 第三部分：参考答案与详细解析（统一放最后） 【考点一：There is/are... 存在句（就近原则 & 主谓一致）】 ◇ 基础题答案与解析： ◇（ ）1 答案：A 📖 解析：主语a desk是单数，用There is ◇（ ）2 答案：B 📖 解析：主语many chairs是复数，用There are ◇（ ）3 答案：A 📖 解析：Is there提问，肯定回答用Yes, there is ▷ 提升题答案与解析： ▷（ ）1 答案：A 📖 解析：就近原则，最近主语a blackboard是单数，用is ▷（ ）2 答案：B 📖 解析：主语some pictures是复数，用are ▷（ ）3 答案：C 📖 解析：books是复数，应改为There are some books ★ 拓展题答案与解析： ★（ ）1 答案：B 📖 解析：windows复数+any否定句，用There aren't ★（ ）2 答案：A 📖 解析：a map单数，用Is there提问 ★（ ）3 答案：B 📖 解析：milk不可数名词，用There is 【考点二：Where is...? / Where are...? 询问位置（单复数区分）】 ◇ 基础题答案与解析： ◇（ ）1 答案：A 📖 解析：the blackboard单数，用Where is ◇（ ）2 答案：B 📖 解析：the chairs复数，用Where are ◇（ ）3 答案：A 📖 解析：ruler单数，回答用It's ▷ 提升题答案与解析： ▷（ ）1 答案：A 📖 解析：Olivia's pencil单数，用is ▷（ ）2 答案：B 📖 解析：desk单数用is，疑问句where+is+主语 ▷（ ）3 答案：B 📖 解析：询问位置用Where ★ 拓展题答案与解析： ★（ ）1 答案：B 📖 解析：对地点on the desk提问用Where ★（ ）2 答案：B 📖 解析：the students复数，用are ★（ ）3 答案：B 📖 解析：Jam and Chen Wei复数，用Where are 【考点三：方位介词 in/on/under/near/beside/behind 辨析】 ◇ 基础题答案与解析： ◇（ ）1 答案：B 📖 解析：在……上面用on ◇（ ）2 答案：C 📖 解析：在……下面用under ◇（ ）3 答案：B 📖 解析：在墙上用on the wall ▷ 提升题答案与解析： ▷（ ）1 答案：A 📖 解析：在……后面用behind ▷（ ）2 答案：B 📖 解析：猫不可能在桌子里面，in表示在……里面 ▷（ ）3 答案：A 📖 解析：在墙上用on，在门旁边用near ★ 拓展题答案与解析： ★（ ）1 答案：B 📖 解析：in表示在……里面/内部 ★（ ）2 答案：C 📖 解析：把书放进书包里，用put...in... ★（ ）3 答案：A 📖 解析：两者之间用between...and... 【考点四：祈使句（动词原形/Don't.../Let's.../Please...）】 ◇ 基础题答案与解析： ◇（ ）1 答案：A 📖 解析：祈使句以动词原形开头，Clean the blackboard ◇（ ）2 答案：B 📖 解析：根据语境，祈使句否定用Don't+动词原形 ◇（ ）3 答案：A 📖 解析：Let's后接动词原形，Let's clean ▷ 提升题答案与解析： ▷（ ）1 答案：C 📖 解析：祈使句用动词原形，不用Opens ▷（ ）2 答案：C 📖 解析：Let's提议，赞同回答用Great!/OK!/Good idea! ▷（ ）3 答案：A 📖 解析：祈使句否定用Don't+动词原形，be late for迟到 ★ 拓展题答案与解析： ★（ ）1 答案：B 📖 解析：祈使句以动词原形开头 ★（ ）2 答案：B 📖 解析：否定祈使句用Don't+动词原形 ★（ ）3 答案：C 📖 解析：祈使句用动词原形Clean开头 【考点五：情态动词 can/can't + 动词原形（表能力，无人称变化）】 ◇ 基础题答案与解析： ◇（ ）1 答案：A 📖 解析：Can you提问，肯定回答Yes, I can ◇（ ）2 答案：B 📖 解析：否定回答用No, he can't ◇（ ）3 答案：A 📖 解析：她很高，所以能够到黑板，用can ▷ 提升题答案与解析： ▷（ ）1 答案：A 📖 解析：can后接动词原形，不用sings ▷（ ）2 答案：B 📖 解析：窗户太高，他打不开，用can't ▷（ ）3 答案：C 📖 解析：询问谁能擦黑板，用Who提问 ★ 拓展题答案与解析： ★（ ）1 答案：B 📖 解析：can/can't后必须接动词原形 ★（ ）2 答案：A 📖 解析：请求帮助用Can you help me, please? ★（ ）3 答案：A 📖 解析：be able to = can，都表示能 【考点六：形容词性物主代词 my/your/his/her/their + 名词】 ◇ 基础题答案与解析： ◇（ ）1 答案：B 📖 解析：后面有名词classroom，用形容词性物主代词my ◇（ ）2 答案：B 📖 解析：后面有名词bag，用his（形容词性物主代词） ◇（ ）3 答案：C 📖 解析：后面有名词desk，用形容词性物主代词his ▷ 提升题答案与解析： ▷（ ）1 答案：B 📖 解析：mine是名词性物主代词，后面不接名词；my接名词 ▷（ ）2 答案：A 📖 解析：后面有名词ruler，用形容词性物主代词her ▷（ ）3 答案：C 📖 解析：后面有名词classroom，用their（他们的） ★ 拓展题答案与解析： ★（ ）1 答案：B 📖 解析：形容词性物主代词后面必须跟名词 ★（ ）2 答案：B 📖 解析：后面有名词books，用your（形容词性） ★（ ）3 答案：C 📖 解析：hers是名词性物主代词，不接名词；应改为her classroom 【考点七：名词复数 desks/chairs/windows/pictures/books/boxes 变化规则】 ◇ 基础题答案与解析： ◇（ ）1 答案：B 📖 解析：many后接可数名词复数，desk→desks ◇（ ）2 答案：B 📖 解析：three后接复数，picture→pictures ◇（ ）3 答案：B 📖 解析：how many后接复数，window→windows ▷ 提升题答案与解析： ▷（ ）1 答案：B 📖 解析：box复数应为boxes，以x结尾加es ▷（ ）2 答案：B 📖 解析：some后接复数，pen→pens ▷（ ）3 答案：B 📖 解析：five后接复数，eraser→erasers ★ 拓展题答案与解析： ★（ ）1 答案：B 📖 解析：以ch/sh/s/x结尾的名词，复数加es（如watches, boxes） ★（ ）2 答案：C 📖 解析：brush以sh结尾，复数加es→brushes ★（ ）3 答案：B 📖 解析：window复数直接加s→windows 【考点八：一般现在时三单变化 has/cleans/sweeps/opens】 ◇ 基础题答案与解析： ◇（ ）1 答案：B 📖 解析：Chen Wei是第三人称单数，have→has ◇（ ）2 答案：B 📖 解析：Olivia三单，clean加s→cleans ◇（ ）3 答案：B 📖 解析：Jam三单，sweep加s→sweeps ▷ 提升题答案与解析： ▷（ ）1 答案：B 📖 解析：He三单，应为He has a pen ▷（ ）2 答案：B 📖 解析：Zhou Kai三单，clean加s→cleans ▷（ ）3 答案：A 📖 解析：Does后接动词原形clean（does已经体现三单） ★ 拓展题答案与解析： ★（ ）1 答案：B 📖 解析：三单时have变为has ★（ ）2 答案：B 📖 解析：He三单，open加s→opens ★（ ）3 答案：B 📖 解析：I→He，动词加s→sweeps 【考点九：频度副词 always/usually/often/sometimes/never 排序与位置】 ◇ 基础题答案与解析： ◇（ ）1 答案：C 📖 解析：总是always，表示100%频率 ◇（ ）2 答案：B 📖 解析：从不never，表示0%频率 ◇（ ）3 答案：A 📖 解析：经常often，表示高频率 ▷ 提升题答案与解析： ▷（ ）1 答案：A 📖 解析：频率从高到低：always(100%)>usually>often>sometimes>never(0%) ▷（ ）2 答案：B 📖 解析：她很有帮助，所以总是帮同学，用always ▷（ ）3 答案：C 📖 解析：教室里不允许吃东西，所以从不在教室吃，用never ★ 拓展题答案与解析： ★（ ）1 答案：A 📖 解析：频度副词放在实义动词之前，如He always cleans ★（ ）2 答案：A 📖 解析：频度副词often放在动词do之前 ★（ ）3 答案：B 📖 解析：sometimes(有时)→always(总是)频率更高 【考点十：综合辨析（教室物品位置+指令+频度+保持整洁全流程）】 ◇ 基础题答案与解析： ◇（ ）1 答案：B 📖 解析：many desks and chairs复数，用There are ◇（ ）2 答案：A 📖 解析：祈使句以动词原形开头，Open the window ◇（ ）3 答案：B 📖 解析：回答是地点on the wall，用Where提问 ▷ 提升题答案与解析： ▷（ ）1 答案：A 📖 解析：书在桌子上用on；books复数宾格用them ▷（ ）2 答案：A 📖 解析：合理顺序：先开门通风→擦黑板→扫地 ▷（ ）3 答案：B 📖 解析：请求帮助，肯定回答用Sure!/Of course!/Certainly! ★ 拓展题答案与解析： ★（ ）1 答案：B 📖 解析：desks复数，应为The desks are clean ★（ ）2 答案：A 📖 解析：Let's+动词原形表示建议，Let's clean ★（ ）3 答案：B 📖 解析：教室规则海报的最佳标题是保持教室干净整洁 — 重点知识总结 & 易错考点专项训练 — 学科网（北京）股份有限公司 $