Unit 4 Safety first 核心语法精讲精练（专项训练）-2026-2027学年译林版（三起）英语五年级上册

**基本信息** 聚焦情态动词should/shouldn't用法，通过“概念-句型-应用”逻辑链系统梳理，配套多样化练习实现专项突破，提升语言运用与规则理解能力。 **专项设计** |模块|题量/典例|方法提炼|知识逻辑| |----|-----------|----------|----------| |核心语法梳理|3类句型示例|should表建议/责任、shouldn't表劝阻，后接动词原形，无人称变化，否定句/疑问句结构规则|从基本概念到句型结构（肯定/否定/疑问）再到用法要点（语气比较、易错提醒）递进| |对应练习|5大题50分（填空/单选/补全句子等）|结合“安全”主题语境，通过不同题型强化should/shouldn't在具体情境中的应用|以题载法，覆盖语法规则应用全场景，易错总结直击动词原形使用、否定回答等核心考点|

译林版英语五年级上册 Unit 4 Safety first 核心语法精讲精练 第一部分：核心语法梳理 本单元围绕“安全第一”主题展开，核心语法是情态动词 should 和 shouldn't 的用法，用于表达建议、责任和义务。 核心语法：情态动词 should / shouldn't 基本用法 should 是情态动词，意为“应该”，用于表示建议、责任或义务。shouldn't 是 should not 的缩写形式，意为“不应该”，用于表示劝阻或禁止。 句型结构 肯定句：主语 + should + 动词原形 + 其他. -We should walk slowly inside the classroom. 我们应该在教室里慢慢走。 - You should warm up before PE class. 你应该在体育课前热身。 否定句：主语 + shouldn't + 动词原形 + 其他. - We shouldn't run on the stairs. 我们不应该在楼梯上跑。 -You shouldn't push others in the classroom. 你不应该在教室里推别人。 一般疑问句：Should + 主语 + 动词原形 + 其他? - Should we listen to teachers carefully? 我们应该认真听老师的话吗？ - 肯定回答：Yes, 主语 + should. - 否定回答：No, 主语 + shouldn't. 用法要点 should 是情态动词，后接动词原形，没有人称和数的变化。 should 的否定形式是 shouldn't = should not。 shouldn't 后同样接动词原形。 should 的语气比 must（必须）要弱，更侧重于“建议”而非“强制”。 第二部分：对应练习 练习一：用 should 或 shouldn't 填空（10分） 1. We __________ warm up before sports. 2. You __________ run on the stairs. It's dangerous. 3. She __________ help her classmates when they fall down. 4. They __________ throw rubbish everywhere. 5. We __________ speak politely to teachers and classmates. 6. He __________ play with sharp things. 7. You __________ finish your homework on time. 8. We __________ cut in line. 9. They __________ listen to teachers carefully in class. 10. I __________ go to bed early on school nights. 练习二：单项选择（10分） ( ) 1. We ______ walk slowly inside the classroom. A. should B. shouldn't C. are ( ) 2. You ______ run or chase each other on the stairs. A. should B. shouldn't C. can ( ) 3. —Should I warm up before PE class? —Yes, you ______. A. should B. shouldn't C. are ( ) 4. They ______ pull their classmates' clothes when they run. A. should B. shouldn't C. must ( ) 5. She ______ sit down at once after running. A. should B. shouldn't C. shoulds ( ) 6. We ______ keep our classroom tidy and clean. A. should B. shouldn't C. shouldn't to ( ) 7. —______ we help our classmates? —Yes, we should. A. Are B. Do C. Should ( ) 8. You ______ eat snacks in class. A. should B. shouldn't C. should not to ( ) 9. They ______ push others in the classroom. A. should B. should to C. shouldn't ( ) 10. We ______ line up when going out. A. should B. shouldn't C. shoulds 练习三：根据中文补全句子（10分） 1. 我们应该在体育课前热身。 We __________ __________ up before PE class. 2. 你不应该在楼梯上跑。 You __________ __________ on the stairs. 3. 我们不应该在课堂上吃零食。 We __________ __________ snacks in class. 4. 你应该按时完成作业。 You __________ __________ your homework on time. 5. 他们应该帮助他们的同学。 They __________ __________ their classmates. 练习四：连词成句（10分） 1. should / We / tidy / classroom / our / keep (.) ________________________________________________ 2. shouldn't / They / stairs / chase / on / each other (.) ________________________________________________ 3. should / You / homework / on / finish / time (.) ________________________________________________ 4. shouldn't / cut / We / line / in (.) ________________________________________________ 5. should / warm / before / PE / You / up / class (.) ________________________________________________ 练习五：按要求改写句子（10分） 1. We should run on the playground.（改为否定句） ________________________________________________ 2. You should push others.（改为否定句） ________________________________________________ 3. He should listen to the teacher carefully.（改为一般疑问句） ________________________________________________ 4. Should we keep our classroom clean?（作肯定回答） ________________________________________________ 5. They shouldn't play with sharp things.（改为肯定句） ________________________________________________ 参考答案 练习一 1. should 2. shouldn't 3. should 4. shouldn't 5. should 6. shouldn't 7. should 8. shouldn't 9. should 10. should 练习二 1. A 2. B 3. A 4. B 5. B 6. A 7. C 8. B 9. C 10. A 练习三 1. should warm 2. shouldn't run 3. shouldn't eat 4. should finish 5. should help 练习四 1. We should keep our classroom tidy. 2. They shouldn't chase each other on stairs. 3. You should finish homework on time. 4. We shouldn't cut in line. 5. You should warm up before PE class. 练习五 1. We shouldn't run on the playground. 2. You shouldn't push others. 3. Should he listen to the teacher carefully? 4. Yes, we should. 5. They should play with sharp things. 易错总结： - should 后接动词原形，没有人称和数的变化。 - shouldn't = should not，后接动词原形。 - 一般疑问句将 should 提到主语前：Should + 主语 + 动词原形? - 回答时用 should 或 shouldn't，不可用 do/does。 学科网（北京）股份有限公司 $