Unit 3 I can email my friends with the computer单元知识总结及重点易错（专项训练）-2025-2026学年湘少版（三起）英语五年级上册

**基本信息** 聚焦湘少版五年级上册Unit3核心语言知识，以“电脑/网络应用”为主题，通过“词汇-短语-句型-语法-考点训练”五级体系，构建从基础积累到综合应用的分层突破路径，突出语言能力与思维品质培养。 **专项设计** |模块|题量/典例|方法提炼|知识逻辑| |----|-----------|----------|----------| |单词/短语/句型|17词/12短语/10句型|按“动作类/情态频率类”主题分类，结合例句与注意点（如email作动词）|从核心词汇到功能句型，形成“词-短语-句”表达链| |语法|6大语法点|情态动词can用法（后接原形/无人称变化）、频度副词位置（be后实前）、动词搭配辨析（search for/find/find out）|从基础规则（can表能力）到易混点区分（信息不可数），层层递进| |十大考点训练|90题（每考点9题）|基础题巩固规则（can/can't选择）、提升题强化辨析（send to搭配）、拓展题综合应用（情景对话逻辑）|覆盖单元高频易错点，通过“基础-提升-拓展”三级训练实现能力迁移|

湘少版（三起）五年级上册 Unit 3 I can email my friends 考点精练 湘少版（三起）五年级上册 Unit 3 I can email my friends with the computer 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。 第一部分 重点单词汇总 【电脑/网络动作类】 单词 词性 中文释义 例句 computer n. 电脑 I can use a computer. email v./n. 发邮件/电子邮件 I can email my friends. send v. 发送 I send emails every day. write v. 写 I write emails to Lily. type v. 打字 I can type fast. search v. 搜索 I search for information. find v. 找到 I find many pictures. visit v. 访问；拜访 I visit websites. 【情态/频率/其他词】 单词 词性 中文释义 例句 can aux. 能；会 I can email my friends. can't aux. 不能；不会 I can't find the website. must aux. 必须 We must be careful online. often adv. 经常 I often chat online. usually adv. 通常 I usually write emails. sometimes adv. 有时 I sometimes play games. information n. 信息 I find information online. internet n. 互联网 The internet is useful. website n. 网站 I visit many websites. 第二部分 重点短语汇总 短语 中文释义 例句 注意点 email sb. 给某人发邮件 I email my friends. email可作动词 send an email 发送一封邮件 I send an email to Lily. send的搭配 write an email 写一封邮件 I write emails every day. write的搭配 search for 搜索；查找 I search for pictures. for后接搜索对象 find out 查明；找出 I find out the answer. 强调"发现结果" visit a website 访问网站 I visit websites after school. website可数 chat online 在线聊天 We often chat online. chat的过去式chatted play games 玩游戏 I sometimes play games. games复数 get information 获取信息 I get information online. information不可数 with the computer 用电脑 I email with the computer. with表"用" on the internet 在互联网上 I search on the internet. 固定搭配 be careful 小心；当心 We must be careful. be动词+careful 第三部分 重点句型汇总 句型 功能 例句 注意点 I can + 动词原形. 表达会/能做某事 I can email my friends. can后接动词原形 I can't + 动词原形. 表达不会/不能 I can't find the website. can't = cannot Can you + 动词原形? 询问对方能否做 Can you send emails? Yes, I can. / No, I can't. How can I...? 询问方式方法 How can I find it? 回答用By.../You can... I often/usually/sometimes... 描述频率 I often visit websites. often在be/助动词后实义动词前 I must + 动词原形. 表达必须做 I must be careful. must后接原形，无时态变化 Let me + 动词原形. 提议让我做 Let me send an email. Let后接宾格+动词原形 What can you do? 询问会做什么 What can you do online? 回答用I can... I'm good at... 擅长…… I'm good at typing. at后接名词/动名词 It's easy/difficult to... 做某事容易/难 It's easy to use. it作形式主语 第四部分 重点语法汇总 语法一：can 表能力 can是情态动词，后接动词原形。肯定：I can email. 否定：I can't email. 疑问：Can you email? 回答：Yes, I can. / No, I can't. 注意：can没有人称和数的变化（不论I/you/he都用can），can't = cannot。 语法二：can 与 be able to 区分 本单元重点掌握can。can用于一般现在时表能力；be able to可用于各种时态但本单元不涉及。can的疑问句直接把can提到主语前，不用do/does。 语法三：频度副词的位置 often/usually/sometimes是频度副词，放在be动词后、实义动词前。如：I often visit websites. / He is usually busy. 放在句首或句末也可表示强调。 语法四：search for 与 find 区分 search for = 搜索（强调过程）；find = 找到（强调结果）。如：I search for pictures online.（我在网上搜图片）/ I find a good website.（我找到一个好网站）。find out = 查明（真相/答案）。 语法五：send/write/email 的用法 send/write + 名词 + to + 人：send an email to Lily = write an email to Lily = email Lily。email可作动词：I email my friends. = I send emails to my friends. 语法六：information 不可数名词 information（信息）是不可数名词，不能加s，不能用a/an修饰。表数量用some/a piece of。如：I get some information. / a piece of information. 第五部分 十大易错考点专项训练 考点一：can/can't 表能力（情态动词基本用法） 基础题：（选择题） ◇（ ）1. I ______ email my friends with the computer. A. can B. cans C. canning D. am can ◇（ ）2. Olivia ______ type very fast. A. can B. cans C. is can D. can to ◇（ ）3. —Can you send emails? —Yes, I ______. A. can B. am C. do D. send 提升题：（选择题） ▷（ ）1. Chen Wei ______ find the website. He is looking for it. A. can B. can't C. isn't D. doesn't ▷（ ）2. Lily and Bella ______ chat online after school. A. can B. cans C. can to D. is can ▷（ ）3. —______ Jam use the computer? —No, he ______. A. Can; can't B. Do; don't C. Is; isn't D. Does; doesn't 拓展题：（选择题） ★（ ）1. Which is RIGHT? A. He can plays games. B. He can play games. C. He cans play games. D. He can to play games. ★（ ）2. Zhang Hao and Zhou Kai ______ write emails, but they ______ send pictures. A. can; can't B. can; can C. can't; can D. cans; can't ★（ ）3. —What can Olivia do? —She ______ emails and ______ websites. A. can write; visit B. can write; can visit C. writes; visits D. can writes; can visits 考点二：Can you...? 一般疑问句与回答 基础题：（选择题） ◇（ ）1. —Can you use a computer? —______. A. Yes, I am. B. Yes, I can. C. Yes, I do. D. Yes, I use. ◇（ ）2. —Can Lily send emails? —No, ______. A. she can B. she can't C. she don't D. she isn't ◇（ ）3. —______ they play games online? —Yes, they can. A. Do B. Are C. Can D. Does 提升题：（选择题） ▷（ ）1. —Can you and Jam email friends? —Yes, ______. A. we can B. we do C. we are D. we can to ▷（ ）2. —Can Chen Wei find the website? —______, he can't find it. A. Yes B. No C. Not D. Sorry ▷（ ）3. —______ Bella type fast? —Yes, she ______. A. Do; does B. Is; is C. Can; can D. Does; types 拓展题：（选择题） ★（ ）1. Which is the correct negative answer to 'Can you help me?' A. No, I can't. B. No, I don't. C. No, I am not. D. No, I haven't. ★（ ）2. —Can I use your computer? —______. A. Yes, I can. B. Yes, you can. C. Yes, you do. D. Yes, you are. ★（ ）3. —______ your brother search for information? —No, he ______. A. Do; don't B. Can; can't C. Is; isn't D. Does; doesn't 考点三：频度副词 often/usually/sometimes 位置 基础题：（选择题） ◇（ ）1. I ______ visit websites after school. A. often B. am often C. often am D. often to ◇（ ）2. Olivia is ______ busy with her homework. A. usually B. usual C. is usually D. usualy ◇（ ）3. We ______ play computer games on Sunday. A. sometimes B. are sometimes C. sometimes are D. is sometimes 提升题：（选择题） ▷（ ）1. Chen Wei and Jam ______ often ______ emails to each other. A. are; write B. do; write C. /; write D. can; writing ▷（ ）2. Bella ______ late for school. A. is sometimes B. sometimes is C. are sometimes D. sometimes are ▷（ ）3. —How ______ do you email your friends? —I ______ email them. A. often; usually B. usually; often C. often; often D. usually; usually 拓展题：（选择题） ★（ ）1. Which sentence is WRONG? A. I often visit websites. B. She is usually happy. C. They sometimes plays games. D. He often reads emails. ★（ ）2. Put the words in order: often / Lily / emails / writes / to / friends / her A. Lily often writes emails to her friends. B. Lily writes often emails to her friends. C. Often Lily writes emails to her friends. D. Lily writes emails often to her friends. ★（ ）3. Olivia usually ______ on the computer, but today she ______ with her friends. A. studies; chats B. studies; is chatting C. is studying; chats D. study; chat 考点四：send/write/email 的用法与搭配 基础题：（选择题） ◇（ ）1. I often ______ emails to my friends. A. send B. sent C. sending D. sends ◇（ ）2. Olivia ______ an email to Bella yesterday. A. write B. writes C. wrote D. writing ◇（ ）3. I can ______ my friends with the computer. A. email B. emails C. emailing D. emailed 提升题：（选择题） ▷（ ）1. Chen Wei sends many emails ______ his classmates. A. for B. to C. with D. at ▷（ ）2. —Who do you often write emails to? —I write emails to ______. A. Olivia and Jam B. Olivia and Jam's C. Olivia's and Jam D. Olivia and Jams ▷（ ）3. Lily wrote a long email ______ her mother. A. for B. to C. with D. at 拓展题：（选择题） ★（ ）1. Which is NOT correct? A. I email my friends. B. I send emails to my friends. C. I write emails my friends. D. I write emails to my friends. ★（ ）2. Jam ______ an email to his teacher last night. He ______ many emails every week. A. writes; writes B. wrote; writes C. wrote; wrote D. writes; wrote ★（ ）3. Olivia can ______ emails, but she can't ______ pictures online. A. sends; send B. send; sends C. send; send D. sends; sends 考点五：search for / find / find out 区分 基础题：（选择题） ◇（ ）1. I ______ for pictures on the internet. A. search B. searches C. finding D. look ◇（ ）2. I can't ______ my pen. Where is it? A. search B. find C. search for D. look ◇（ ）3. Let me ______ the answer online. A. find out B. find C. search D. look 提升题：（选择题） ▷（ ）1. Olivia is ______ for information about Kunming. A. finding B. searching C. looking D. finding out ▷（ ）2. I ______ a great website for learning English. A. looked for B. found C. searched D. finded ▷（ ）3. —Can you ______ what time it is? —Yes, it's 3 o'clock. A. search B. find C. find out D. look for 拓展题：（选择题） ★（ ）1. Which is the best word for this sentence? 'I ______ many websites but I can't ______ the answer.' A. searched; find B. found; search C. looked; find out D. searched for; found ★（ ）2. Zhang Hao ______ the internet for an hour. He ______ a useful website. A. searched; found B. found; searched C. searched; finded D. finds; searched ★（ ）3. Which sentence uses 'find out' correctly? A. I find out my key under the desk. B. Let me find out the answer. C. I find out a good book. D. She finds out her friend. 考点六：must 表必须 + be careful 基础题：（选择题） ◇（ ）1. We ______ be careful online. A. must B. musts C. must to D. must be ◇（ ）2. You ______ tell your password to others. A. must B. mustn't C. must not to D. don't must ◇（ ）3. —Must I finish the email now? —Yes, you ______. A. must B. need C. can D. do 提升题：（选择题） ▷（ ）1. Lily, you ______ be careful when you chat with strangers online. A. must B. musts C. must to D. are must ▷（ ）2. We must ______ our personal information safe. A. keeps B. keep C. keeping D. to keep ▷（ ）3. —Must Chen Wei go now? —No, he ______. A. mustn't B. needn't C. can't D. doesn't 拓展题：（选择题） ★（ ）1. Which is WRONG? A. I must be careful. B. He must go now. C. She musts study hard. D. We must help him. ★（ ）2. Olivia ______ show her password to anyone. It's dangerous. A. must B. mustn't C. can D. need ★（ ）3. —______ I use your computer? —Yes, but you ______ be careful. A. Can; must B. Must; can C. Do; must D. Am; must 考点七：information 不可数名词 基础题：（选择题） ◇（ ）1. I get some useful ______ on the internet. A. informations B. information C. a information D. many information ◇（ ）2. This is ______ important information. A. a B. an C. many D. some ◇（ ）3. Can you give me a piece of ______? A. informations B. information C. news D. advices 提升题：（选择题） ▷（ ）1. There isn't ______ information about the school on the website. A. many B. a C. much D. some ▷（ ）2. Olivia found ______ interesting information about Jinan. A. many B. a lot C. much D. a ▷（ ）3. I need some ______ about the computer class. A. informations B. information C. a information D. many information 拓展题：（选择题） ★（ ）1. Which is RIGHT? A. I have many informations. B. I have much information. C. I have a information. D. Informations are useful. ★（ ）2. We can find a lot of ______ and some ______ on the internet. A. informations; picture B. information; pictures C. information; picture D. informations; pictures ★（ ）3. Zhang Hao has ______ about computers, but he doesn't have ______ about the internet. A. many information; much B. much information; many C. much information; some D. some information; any 考点八：How can I...? 询问方式与回答 基础题：（选择题） ◇（ ）1. —How can I send an email? —______ use the computer. A. You can B. You are C. You do D. You must ◇（ ）2. —How can I find the website? —You can ______ it on the internet. A. search for B. search C. find D. look ◇（ ）3. —How can Olivia email her friend? —She ______ use the computer. A. can B. cans C. is can D. can to 提升题：（选择题） ▷（ ）1. —How can I get to the library in Wuhan? —______ take Bus No.5. A. You can B. You are C. You do D. You must ▷（ ）2. —How can Chen Wei and Jam do it? —______ can ask the teacher. A. He B. She C. They D. We ▷（ ）3. —How can I be safe online? —You ______ never tell your password. A. can B. must C. are D. do 拓展题：（选择题） ★（ ）1. —How can I learn to type fast? —______ practice every day. A. You must B. You can C. You are D. You do ★（ ）2. Which is the best answer to 'How can Lily write to her friend in Xiamen?' A. She is write an email. B. She can write an email. C. She writes an email. D. She must writes an email. ★（ ）3. —How can we find good websites? —______. A. We can search on the internet B. We are searching C. We search for D. We must finds 考点九：Let's/Like/Good at 综合辨析 基础题：（选择题） ◇（ ）1. Let me ______ an email to Olivia. A. to send B. send C. sending D. sends ◇（ ）2. I'm good ______ typing on the computer. A. in B. on C. at D. with ◇（ ）3. Let's ______ online together! A. to chat B. chat C. chatting D. chats 提升题：（选择题） ▷（ ）1. Olivia is good ______ finding information online. A. in B. at C. on D. with ▷（ ）2. —Let's visit some websites! —______! A. Yes, I do B. Yes, I am C. Good idea D. Yes, please ▷（ ）3. Lily likes ______ emails to her friends in Qingdao. A. write B. writes C. writing D. to writing 拓展题：（选择题） ★（ ）1. Which is WRONG? A. Let me help you. B. Let's to go now. C. I'm good at typing. D. She likes reading. ★（ ）2. Chen Wei ______ computer games and he is also good ______ them. A. likes; at B. like; in C. likes; on D. liking; at ★（ ）3. —What do you like doing online? —I like ______ and ______. A. search; chat B. searching; chatting C. to search; to chat D. searched; chatted 考点十：综合情景对话与逻辑推断 基础题：（选择题） ◇（ ）1. —Can I help you? —Yes, ______. A. you can B. I can C. please D. you do ◇（ ）2. —Thank you for your help! —______. A. Yes, please B. No, thanks C. You're welcome D. I can help ◇（ ）3. —Excuse me, how can I send an email? —______. A. You can use the computer B. Yes, you can C. I can send D. You are welcome 提升题：（选择题） ▷（ ）1. Olivia: I can't find the website. Jam: ______. Olivia: Thank you! Jam: You're welcome. A. You can't B. Let me help you C. I can't too D. You are wrong ▷（ ）2. —Do you often email your friends? —______. I email them every day. A. Yes, I am B. Yes, I do C. Yes, I can D. No, I don't ▷（ ）3. —What can you do with a computer? —I ______ send emails, ______ information, and ______ websites. A. can; find; visit B. can; finding; visiting C. can; find; visiting D. cans; find; visit 拓展题：（选择题） ★（ ）1. Read the dialogue and choose: Teacher: How can you be safe online? Student: ______. A. I can play games. B. I must be careful with my password. C. I like computers. D. I can use the internet. ★（ ）2. Which is the BEST order for an email dialogue? ① I can't find your email. ② Let me send you another one. ③ Can you check your inbox? ④ OK, I'll check. A. ①②③④ B. ③④①② C. ①②④③ D. ④①②③ ★（ ）3. Bella: Mum, can I use the computer? Mum: ______. Bella: I want to email my friend in Kunming. Mum: OK, but be careful online. A. Yes, you can. B. What do you want to do? C. No, you can't. D. Are you busy? 参考答案与详细解析 （请同学们先独立完成，再对照答案） 考点一 参考答案与解析 基础题： ◇1. A → can是情态动词，后接动词原形email；can没有人称变化，I/you/he都用can。 ◇2. A → Olivia是第三人称单数，但can不变化，直接接动词原形type。 ◇3. A → Can you...?的肯定回答是Yes, I can. 用can回答can提问。 提升题： ▷1. B → 后面说他在找（looking for），说明还找不到，用can't（不能/找不到）。 ▷2. A → 主语是复数（Lily and Bella），can不变化，接动词原形chat。 ▷3. A → 问能力用Can...use? 回答用can/can't。不能用do/does（do问的是行为不是能力）。 拓展题： ★1. B → can后接动词原形play，不是plays/to play；can不变成cans。B正确。 ★2. A → 前半句说会写邮件（can write），but转折说明不能发图片（can't send）。 ★3. A → She can write...and visit... 并列结构中后面省略can，都用动词原形。问What can she do用can回答。 考点二 参考答案与解析 基础题： ◇1. B → Can you...?肯定回答Yes, I can. 用can回答，不用am/do/use。 ◇2. B → 否定回答No, she can't. Lily是女性用she；can提问用can回答。 ◇3. C → 回答用can，提问也用Can。Can they...?问他们能不能。 提升题： ▷1. A → 主语是you and Jam（复数），回答用we can。can后不接to。 ▷2. B → 答句有he can't，是否定回答，用No。No, he can't find it. ▷3. C → 问能力用Can Bella type? 回答Yes, she can. type是动词原形。 拓展题： ★1. A → Can you help me?的否定回答是No, I can't. 其他选项答非所问。 ★2. B → Can I...?问"我能……吗？"回答用Yes, you can. 不是Yes, I can（那是回答别人问你）。 ★3. B → search for information是能力，用Can提问；your brother是三单但can不变化；否定用can't。 考点三 参考答案与解析 基础题： ◇1. A → often是频度副词，放在实义动词visit前。I often visit...正确。 ◇2. A → 频度副词放在be动词后：is usually busy。usually拼写是u-s-u-a-l-l-y。 ◇3. A → play是实义动词，频度副词sometimes放在动词前：We sometimes play... 提升题： ▷1. C → often放在实义动词write前，中间不需要be动词或助动词。Chen Wei and Jam often write... ▷2. A → be动词后接频度副词：is sometimes late。主语Bella是三单用is。 ▷3. A → How often问频率（多久一次），回答用频度副词usually/often/sometimes。第一空How often固定搭配。 拓展题： ★1. C → They是复数，频度副词sometimes后接动词原形play，不是plays。C错误。 ★2. A → 频度副词often放在实义动词writes前、主语Lily后：Lily often writes emails to her friends. ★3. B → usually表经常用一般现在时studies（三单）；today用现在进行时is chatting（be+doing）。 考点四 参考答案与解析 基础题： ◇1. A → send emails to...固定搭配；I是第一人称，一般现在时用send。 ◇2. C → yesterday是过去时间，write的过去式是wrote。sent/wrote均可但选项只有wrote。 ◇3. A → email可作动词，can后接动词原形email。email my friends = send emails to my friends。 提升题： ▷1. B → send...to...固定搭配：send emails to his classmates。 ▷2. A → write emails to Olivia and Jam（给Olivia和Jam写邮件）。人名用and连接，不加's。 ▷3. B → write...to...固定搭配：write an email to her mother。 拓展题： ★1. C → write emails后缺少to：应为write emails to my friends。A/B/D都正确。 ★2. B → last night过去时用wrote；every week经常用一般现在时，he writes。 ★3. C → can后接动词原形，两个空都用send。can send emails / can't send pictures。 考点五 参考答案与解析 基础题： ◇1. A → search for = 搜索（强调过程）。I search for pictures... ◇2. B → find = 找到（强调结果）。找不到笔用can't find。search for强调搜索过程。 ◇3. A → find out = 查明（真相/答案）。Let me find out the answer = 让我查明答案。 提升题： ▷1. B → search for = 搜索（过程）。is searching for information... 正在搜索信息。 ▷2. B → find的过去式是found（不是finded）。强调找到了好网站用found。 ▷3. C → find out = 查明（具体答案/时间）。问时间用find out what time it is。 拓展题： ★1. A → 前半句搜索很多网站用searched（过程）；but转折说找不到答案用can't find（结果）。 ★2. A → for an hour强调过程用searched；后半句强调结果用found（find过去式）。finded是错误拼写。 ★3. B → find out用于查明事实/答案/真相。B：让我查明答案，正确。A/C/D都用find更合适（找具体物品/人）。 考点六 参考答案与解析 基础题： ◇1. A → must是情态动词，后接动词原形be。must没有三单变化（不加s），后面不接to。 ◇2. B → mustn't = 禁止/一定不要。密码不能告诉别人，用mustn't（千万不要）。 ◇3. A → Must I...?的肯定回答用Yes, you must. 否定回答用No, you needn't/don't have to. 提升题： ▷1. A → must后接动词原形be；主语you/Lily等不影响must的形式（无人称变化）。 ▷2. B → must后接动词原形keep。keep...safe = 保持……安全。 ▷3. B → Must...?的否定回答用No, ...needn't. = 不必。mustn't是"禁止"意思不同。 拓展题： ★1. C → must没有人称变化，不用musts。She must study hard正确。C错误。 ★2. B → 绝不能给别人看密码用mustn't（禁止/千万不要）。dangerous也提示这是安全问题。 ★3. A → 第一空问"能/可以"用Can I use...? 第二空"必须小心"用must be careful。 考点七 参考答案与解析 基础题： ◇1. B → information是不可数名词，不加s，不用a/many修饰。some information正确。 ◇2. D → information不可数，用some修饰。不能用a/an（C错），many修饰可数复数。 ◇3. B → a piece of information（一条信息）是information的量词表达。information不可数不加s。 提升题： ▷1. C → information不可数，疑问句/否定句中用much修饰。isn't much information正确。 ▷2. C → information不可数，用much修饰。found much interesting information。 ▷3. B → some修饰不可数名词information，不加s，不用a。some information正确。 拓展题： ★1. B → information不可数：用much修饰（B正确）。A/C/D都错误加了s或a。 ★2. B → a lot of information（不可数）；some pictures（可数复数）。picture是可数名词。 ★3. C → 前半句肯定句用much/some information；后半句doesn't have否定句用any。has some...doesn't have any. 考点八 参考答案与解析 基础题： ◇1. A → How can I...?问方式，回答用You can...（你能……/你可以……）。 ◇2. A → search for = 搜索（过程），强调在网上查找。find是找到（结果），问how问的是方法。 ◇3. A → How can she...?回答She can use... can后接动词原形，无人称变化。 提升题： ▷1. A → How can I get there?问方式，回答You can take Bus No.5.（你可以坐5路公交）。 ▷2. C → Chen Wei and Jam是复数，用They指代。They can ask...（他们可以问老师）。 ▷3. B → 问如何安全上网，回答用must（必须）：You must never tell...（你绝不能告诉别人密码）。 拓展题： ★1. A → learn to type fast需要坚持，用must（必须每天练习）比can（可以）更贴合语境。 ★2. B → How can Lily...?回答She can write... B正确。A语法错（is write）；C不回答how；D must writes错误（must后接原形）。 ★3. A → How can we...?回答We can search on the internet. A完整正确。B是进行时不是回答方式；C缺少宾语；D finds错误。 考点九 参考答案与解析 基础题： ◇1. B → Let + 宾格 + 动词原形。Let me send...（让我发邮件）。 ◇2. C → be good at + 名词/动名词 = 擅长……。be good at typing（擅长打字）。 ◇3. B → Let's = Let us，后接动词原形chat。Let's chat online! 提升题： ▷1. B → be good at doing = 擅长做某事。at后接动名词finding。 ▷2. C → Let's提建议，回答Good idea!表示好主意。Yes, I do/Yes, I am不用于回答Let's。 ▷3. C → like + doing = 喜欢做某事（习惯性）。like writing emails（喜欢写邮件）。 拓展题： ★1. B → Let's后接动词原形go，不是to go。B错误。A/C/D都正确。 ★2. A → Chen Wei三单用likes；be good at（擅长）固定搭配。he is good at them（他擅长它们）。 ★3. B → like doing（习惯性喜欢），两个动词都用动名词：searching and chatting。 考点十 参考答案与解析 基础题： ◇1. C → Can I help you?是服务场景用语，肯定回答Yes, please. 否定回答No, thanks. ◇2. C → Thank you的回答是You're welcome. / Not at all. / My pleasure. ◇3. A → Excuse me问路/求助，回答给出方法：You can use the computer. 提升题： ▷1. B → Olivia说找不到，Jam说让我帮你（Let me help you），Olivia说谢谢，Jam说不客气。逻辑通顺。 ▷2. B → Do you...?提问用do回答。后面说每天发邮件，是肯定，用Yes, I do. ▷3. A → I can send..., find..., and visit... 并列结构共用一个can，都用动词原形。 拓展题： ★1. B → 问如何安全上网，回答必须涉及安全行为。B：我必须小心保管密码，最合理。 ★2. B → 逻辑：③先让对方检查邮箱→④对方同意→①说找不到→②说再发一封。B顺序最合理。 ★3. B → Mum问"你想做什么？"（What do you want to do?），Bella回答想给昆明的朋友发邮件，Mum才同意并提醒注意安全。逻辑最通顺。 第 页 学科网（北京）股份有限公司 $