Unit 5 How do inventions change our lives 第3课时 (同步练)-2026-2027学年沪教版英语六年级上册（新教材）

Unit 5 How do inventions change our lives 第3课时 Communicate & Extend (同步练)-2026-2027学年沪教版英语六年级上册（新教材） 班级：__________　　姓名：__________　　 基础练 一、从方框中选择合适的句子补全对话，将其字母编号写在横线上（其中有一项多余）。 A. How did he get the idea?　　　　　　　 B. He was a famous inventor in ancient China. C. What did he invent?　　　　　　　　　　 D. A leaf cut his finger. E. He made the first saw in the world.　　　 F. That's interesting! G. He saw many small teeth on the leaf.　　 H. Did he invent the plane? Tom: Hi, Lily. Do you know Lu Ban? Lily: Yes. (1) ____________ Tom: (2) ____________ Lily: He invented the saw. Tom: (3) ____________ Lily: One day he was working on a hill. (4) ____________ Tom: Oh! What did he do then? Lily: He looked at the leaf carefully. (5) ____________ Tom: (6) ____________ Lily: Yes. With those teeth, he had a good idea. (7) ____________ Tom: Great! He is really clever. 二、句子改错：下面每句中有一处错误，请找出并把正确答案写在横线上。 1. Lu Ban is a famous inventor in ancient China.　→ ______________ 2. He look at the leaf carefully.　→ ______________ 3. He see many teeth on the leaf.　→ ______________ 4. Lu Ban make the first saw in the world.　→ ______________ 5. A leaf cutted his finger.　→ ______________ 6. He could made a tool with teeth.　→ ______________ 三、用所给动词的正确形式填空。 1. Lu Ban ______________ (be) a clever man in ancient China. 2. One day a small leaf ______________ (cut) his finger. 3. He ______________ (look) at the leaf carefully. 4. He ______________ (find) many sharp teeth on the leaf. 5. Lu Ban ______________ (make) the first saw in the world. 6. Other ancient Chinese people ______________ (invent) many great things. 7. The Wright brothers ______________ (watch) how the birds flew. 8. Chinese people ______________ (use) the saw long ago. 提升练 四、句子排序：把下列句子重新排列，组成一段通顺的话，将字母编号写在括号内。 A. He looked at the leaf carefully and found many sharp teeth on it. B. Lu Ban was a famous inventor in ancient China. C. Soon he made the first saw in the world. D. One day, he was working on a hill when a small leaf cut his finger. E. He had an idea: he wanted to make a tool with teeth. F. With that tool, people could cut wood easily. ( ) → ( ) → ( ) → ( ) → ( ) → ( ) 五、英汉互译。 1. 鲁班是中国古代一位著名的发明家。 2. 一片叶子划破了他的手指。 3. 他在叶子上看到了许多小齿。 4. Lu Ban made the first saw in the world. 5. Before the invention of the saw, people cut wood slowly. 6. After the invention of the wheel, people could travel faster. 六、按要求改写句子。 1. Lu Ban was a famous inventor.（改为否定句） 2. He made a saw.（改为一般疑问句） 3. A leaf cut his finger.（改为否定句） 4. He looked at the leaf carefully.（对画线部分 the leaf 提问） 5. They invented many great things.（改为一般疑问句并作肯定回答） 6. People used the saw long ago.（改为否定句） 拓展练 七、阅读短文，完成任务。 Lu Ban was a famous inventor in ancient China. He made many useful things. One day, Lu Ban was working on a hill. He wanted to cut down a big tree, but he had no good tool. Then a small leaf cut his finger. It hurt. He looked at the leaf carefully and found many small teeth on it. They were very sharp. “What a good idea!” Lu Ban said to himself. He made a tool with teeth. Soon, the first saw in the world was born. With the saw, people could cut wood more easily. Other ancient Chinese people invented many great things too. Paper was invented long ago, and it changed the world. Today, many Chinese inventions still have a great influence around the world. （一）根据短文内容，判断句子正误，正确的写“A”，错误的写“B”。 ( ) 1. Lu Ban was a famous inventor in ancient China. ( ) 2. One day, a small leaf cut Lu Ban's finger. ( ) 3. Lu Ban got the idea of the saw from a bird's teeth. ( ) 4. Paper was invented by Lu Ban. （二）根据短文内容，选择正确的答案。 ( ) 5. What did Lu Ban find on the leaf?　 A. Some water　 B. Many small teeth　 C. A small tool ( ) 6. What did Lu Ban make at last?　 A. A saw　 B. A cart　 C. A ladder （三）根据短文内容，回答问题。 7. Why could people cut wood more easily after the saw was invented? 参考答案与解析 基础练 一、从方框中选择合适的句子补全对话，将其字母编号写在横线上（其中有一项多余）。 【答案】1. B　2. C　3. A　4. D　5. G　6. F　7. E 【解析】 通读对话可知话题是鲁班的发明。 1 题 Lily 先介绍鲁班的身份，选 B； 2 题下一句回答“他发明了锯子”，所以上一句问“他发明了什么”，选 C； 3 题下一句开始讲发明的经过，所以上一句问“他怎样得到这个想法的”，选 A； 4 题说有一天在山上工作时发生的事，选 D（一片叶子划破了他的手指）； 5 题承接“他仔细看那片叶子”，接着说“看到叶子上有许多小齿”，选 G； 6 题表示感兴趣，选 F； 7 题总结他的成果，选 E。H 项与对话内容无关，多余。 【考点】一般过去时在对话中的运用；上下文衔接。 二、句子改错：下面每句中有一处错误，请找出并把正确答案写在横线上。 【答案】1. is → was　2. look → looked　3. see → saw　4. make → made　5. cutted → cut　6. made → make 【解析】 1 题介绍古代的人，用过去式 was； 2、3、4 题叙述过去发生的事，动词分别用过去式 looked / saw / made； 5 题 cut 的过去式和原形同形，仍然是 cut，不能加 -ed； 6 题 could 是情态动词，后面必须接动词原形 make。 【考点】一般过去时动词形式；情态动词后接动词原形。 三、用所给动词的正确形式填空。 【答案】1. was　2. cut　3. looked　4. found　5. made　6. invented　7. watched　8. used 【解析】句子讲的都是过去发生的事，用一般过去时。注意不规则动词：be → was，cut → cut，find → found，make → made；规则动词 look、invent、watch、use 直接在词尾加 -ed。第 8 题有 long ago（很久以前），用 used。 【考点】规则动词与不规则动词的过去式。 提升练 四、句子排序：把下列句子重新排列，组成一段通顺的话，将字母编号写在括号内。 【答案】B → D → A → E → C → F 【解析】这段话按时间顺序讲述鲁班发明锯子的经过：先介绍身份（B），再说事情发生的时间与起因（D），接着写他仔细观察（A）、产生想法（E）、动手做出锯子（C），最后写锯子带来的变化（F）。排序时可以抓住 One day、Soon 等时间线索和“发现—思考—发明—影响”的逻辑顺序。 【考点】语段逻辑与时间顺序。 五、英汉互译。 【答案】 1. Lu Ban was a famous inventor in ancient China.　 2. A leaf cut his finger.　 3. He saw many small teeth on the leaf.　 4. 鲁班制造了世界上第一把锯子。　 5. 在锯子发明之前，人们砍木头很慢。　 6. 在轮子发明之后，人们可以出行得更快。 【解析】 1—3 题是汉译英，注意用一般过去时：was / cut / saw。 4—6 题是英译汉，注意 before / after the invention of ... 表示“在……发明之前 / 之后”，could 表示“能够”。 【考点】一般过去时的翻译；before / after the invention of 句型。 六、按要求改写句子。 【答案】 1. Lu Ban wasn't a famous inventor.　 2. Did he make a saw?　 3. A leaf didn't cut his finger.　 4. What did he look at carefully?　 5. Did they invent many great things? Yes, they did.　 6. People didn't use the saw long ago. 【解析】含 be 动词（was）的句子变否定句，直接在 was 后加 not（wasn't）；含实义动词过去式的句子，改否定句和一般疑问句都要借助 did：否定句用 didn't + 动词原形，一般疑问句把 Did 提到句首、动词用原形。对 the leaf 提问用 What，后接 did + 主语 + 动词原形。 【考点】一般过去时的否定句、一般疑问句与特殊疑问句。 拓展练 七、阅读短文，完成任务。 【答案】1. A　2. A　3. B　4. B　5. B　6. A　 7. Because the saw had teeth and could cut wood easily. 【解析】 1 题短文第一句说明鲁班是中国古代著名的发明家，正确； 2 题短文说有一天一片小叶子划破了他的手指，正确； 3 题短文说启发来自“叶子上的小齿”，不是鸟的牙齿，错误； 4 题短文只说纸是很久以前发明的，并没有说是鲁班发明的，错误； 5 题他在叶子上发现了许多小齿，选 B； 6 题他最后做出的是锯子，选 A； 7 题短文说“有了锯子，人们能更容易地砍木头”，回答时用 because 说明原因，意思正确、时态正确、首字母大写即可。 【考点】语篇信息提取与判断；一般过去时的简答表达。 第 4 页　共 4 页 学科网（北京）股份有限公司 $