Unit 4 Safety first（语法精讲+专项练习）

**基本信息** 小学英语单元复习专项训练，聚焦情态动词should及safe系列词用法，通过"精讲+精练"系统构建语法应用能力，提升语言运用与逻辑思维。 **专项设计** |模块|题量/典例|方法提炼|知识逻辑| |----|-----------|----------|----------| |语法01（should用法）|5大题（填空/选择/句型转换等）|句型结构分类（肯定/否定/疑问）、使用场景归纳（建议/责任等）|从"情态动词+动词原形"核心概念，到四种句型结构推导，再到场景应用拓展| |语法02（safe系列词）|4大题（填空/选择/完成句子等）|词性辨析（形/名/副）、句型结构（It is+safe+to do sth.等）|从词性含义区分，到固定句型构建，再到语境中词性转换运用|

2026秋 译林版英语五年级上册专项提优 Unit 4 Safety first 语法精讲 语法01 情态动词 should的用法 should是情态动词，意为“应该，应当”，没有人称和数的变化，should后接动词原形。 一、句型结构 1.肯定句：主语+ should+动词原形+其他。 例：You should warm first, Willy.威利，你得先热身。 2.否定句：主语+ shouldn't+动词原形+其他。 含should的否定句，直接在should后加not,可缩写为shouldn't,意为“不应该”。 例: You shouldn't eat too many sweets. They are bad for your teeth. 你不应该吃太多糖果。它们对你的牙齿有害。 3.一般疑问句：Should+主语+动词原形+其他？ 肯定回答：Yes,主语+ should. 否定回答：No,主语+ shouldn't. 例:—Should I water the flowers?我应该浇花吗？ —Yes, you should./ No, you shouldn't.是的，你应该。/不，你不应该。 4.特殊疑问句：特殊疑问词+should+主语+动词原形+其他？ 答语：主语+ should+动词原形+其他。 例:—What should I do?我应该做什么? —You should have a rest.你应该休息。 二、should的常见使用场景 1.提出建议或忠告。 如：You look tired. You should take a rest.你看起来累。你应该休息。 2.询问对方的意见或建议。 如：What should I do if I feel dizzy?如果我感到眩晕，我应该做什么？ 3.表达责任或正确的做法。 如：Everyone should follow the traffic rules.每个人应该遵守交规。 4.用于征求意见的委婉表达。 如：Should I tell the teacher about the broken glass?我应该告诉老师关于打坏的玻璃的事吗？ 语法精练01 一、用should或shouldn't填空。 1. It's very cold outside. You __________ wear a thick coat. 2. We __________ run in the library. Everyone is reading quietly. 3.—I have a headache. What __________I do? —You __________ take some medicine and have a good rest. 4. You __________ talk to strangers online. It's not safe. 5. In the museum, visitors __________ touch the paintings. It's against the rules. 6. The floor is wet. You __________ walk slowly and carefully. 7.—Lily, __________ I tell the teacher about the broken window? —Yes, you __________. Safety is important. 8. We __________ always fasten our seat belts in the car. 二、用所给单词的适当形式填空。 1.—What should the man ________(do)? —He should ________(have) some water. 2. The boy ________(should) eat or drink after meals. He is too fat. 3. ________(should) her sister ________(brush) her teeth? 4. We shouldn't have ________(some) sweets if we have a toothache. 5. They ________(should) shout in class. 三、单项选择。 ( )1. To keep safe at home, children __________ play with electrical sockets. A. should B. shouldn't C. must ( )2.—__________should we do before we cross the road? —We should look left and right. A. How B. What C. Where ( )3. You __________ feed the animals in the zoo. Human food can make them sick. A. should B. shouldn't C. can ( )4.—__________ I bring my umbrella tomorrow? —Yes. The weather report says it will rain. A. Should B. Must C. Do ( )5. What __________ you do when the light is red? A. should B. does C. are 四、按要求完成下列各题。 1. You should drink some warm water. (改为一般疑问句，并作否定回答) —__________ __________ drink __________ warm water? —No, you __________. 2. Tim should eat some sweets.(改为否定句) Tim __________ eat __________ sweets. 3. You can't take any medicine. (用should代替can't改写句子) You __________ take __________ medicine. 4. He should put on his jacket.(对画线部分提问) __________ should he __________? 5. You should go to school early.(改为同义句) You __________ go to school __________. 6. grandma, home, my,a, should, rest, have, at(.) (连词成句) ____________________________________________________________ 五、按要求改写句子。 A) 改为否定句 1.You should drink some cold water. → You __________ __________ __________ cold water. 2.We should eat too much meat. → We __________ __________ too much meat. 3.He should go to school today. → He __________ __________ to school today. B) 改为一般疑问句并作肯定/否定回答 4.They should clean their classroom. → __________ they __________ their classroom? → Yes, __________ __________. 5.I should take a rest. → __________ __________ take a rest? → No, __________ __________. 6.We should plant trees in spring. → __________ __________ plant trees in spring? → Yes, __________ __________. C) 对划线部分提问 7.You should see a doctor. → __________ __________ I __________? 8.He should drink some warm water. → __________ __________ he __________? 9.They should go to bed early. → __________ __________ they __________ to bed? 10.We should protect the Earth. → __________ __________ we __________? 语法02 safe、safety及safely的用法及区别 一、safe、safety、safely的词性与含义 1.safe形容词，意为 “安全的” 2.safety名词，意为 “安全；安全性” 3.safely副词，意为 “安全地” 二、含safe的句型结构 1. It is + safe(+ for sb.) + to do sth. 做某事（对 某人来说）是安全的。 如：It is safe to swim in the swimming pool.在泳池里游泳是安全的。 2.主语+keep(s) +名词/代词+safe.······保 护……的安全。 如：Parents always keep their children safe.家长总是保护孩子们的安全。 3. 主语+be safe from +名词.······免受······的伤 害。 如：We are safe from the rain under the roof.在屋檐下我们免受雨的伤害。 语法精练02 一、用safe的适当形式填空。 1. The children are playing in the garden. They are __________ from the busy road. 2. Remember to put the medicine in a __________ place. Your little sister can't reach it. 3. The boat moved slowly across the lake, and we all arrived __________. 4. School __________ is everyone's job. We should follow the rules. 二、单项选择。 ( )1. We should always think about __________ first when we play sports. A. safe B. safety C. safely ( )2. The dog is __________. A. save B. safe C. safety ( )3. Please drive __________ on the road. A. safe B. safety C. safely ( )4. It is not __________ for a child to touch the hot stove. A. safe B. safety C. save 三、根据中文意思完成句子。 1.过马路时，我们要确保自己的安全。 We should keep __________ when we cross the road. 2.在这条河里游泳不安全。 It is not __________ to swim in this river. 3.把钱放在一个安全的地方。 Put the money in a __________ place. 4.孩子们安全地到达了动物园。 The children arrived at the zoo __________. 四、按要求完成句子。 1. It is safe to walk on the pavement.（改为否定句） It__________ __________ to walk on the pavement. 2. He is a safe driver.（改为同义句） He drives __________. 3. Please cross the road safely.（用形容词改写句子） Please cross the road in a __________ way. Unit 4参考答案 语法精练01 一、1.should 2.shouldn't 3.should; should 4. shouldn't 5. shouldn't 6. should 7. should; should 8. should 二、1.do 2.have 3.Should, brush 4.any 5.shouldn’t 三、1. B解析为了在家保持安全，孩子不应该玩 电源插座。 2. B 3. B 4. A 5. A 四、1. Should I; any; shouldn't 2. shouldn't; any 3. should; some 4. What; do 5. shouldn't; late 6. My grandma should have a rest at home. 五、句型转换 A) 否定句 1.shouldn't drink any 2. shouldn't eat 3. shouldn't go B) 一般疑问句及回答 4.Should; clean; they should 5. Should I; I shouldn't 6. Should we; we should C) 对划线部分提问 7.What should; do 8. What should; drink 9. When should; go 10. What should; protect 语法精练02 一、1. safe 2. safe 3. safely 4. safety 二、1. B 2. B 3. C 4. A 三、1. safe 2. safe 3. safe 4. safely 四、1. isn't safe 2. safely 3. safe 第 1 页 共 6 页 学科网（北京）股份有限公司 $