Unit 2 Keep safe（期中知识清单） 四年级英语下学期（北京版·新教材）

知识清单·北京版四年级下册 Unit 2 Keep safe 知识梳理 知识点拨 【考点一】祈使句 【考点二】情态动词should的用法 考点一：祈使句 (1) Please don't throw things out of the window. 请不要往窗户外扔东西。 (2) No swimming. 禁止游泳。 (3) Walk slowly and keep to the right, please. 请慢慢走并靠右侧行走。 (4) Be careful! 小心！ 祈使句：主要用于发出指令、提出请求、给出建议或发出警告，通常省略主语 you。句末用感叹号或句号，句前或句后通常放置 please 表示礼貌请求，使原本的语气更委婉客气。 句型结构 用法 例句 肯定式祈使句 动词原形 (+ 其他). 直接提出指令、建议 Watch your step, please. 请小心脚下。 Be 动词 + 形容词 (+ 其他). 表示某种状态 Be careful. 小心。 Let + 人称代词宾格 + 动词原形 (+ 其他). 提出让某人做某事 Let's have some juice. 让我们喝点果汁吧。 否定式祈使句 Don't + 动词原形 (+ 其他). 表示不要做某事，用于否定指令 Don't swim. 不要游泳。 Don't+be 动词 (+ 其他). 表示不要保持某种状态 Don't be late. 不要迟到。 1. Let sb. not + 动词原形 (+ 其他). 2. Don't let sb.+ 动词原形 (+ 其他). 让某人不要干某事的建议 Let him not go.=Don't let him go. 不要让他走。 No + 动名词 / 名词. 表示禁止，多用于公共场所标语 No running. 禁止奔跑。 大显身手 一、单项选择。 ( ) 1．Don’t ______ in the library. A．talk B．talks C．talking ( ) 2．Children, the light is red now! Please ______ cross. A．/ B．do C．don’t ( ) 3．______ talk in class. Be quiet. A．Don’t B．Not C．Doesn’t ( ) 4．Don’t ______ rubbish everywhere. A．throw B．throwing C．throws ( ) 5．______ careful! Don’t run on the road. A．Be B．Is C．Are 二、选词填空。 6．Let’ s (go / goes) to the playground. 7．Look! It’s green now. (Let’s / Don’t) go. 8．Please don’t (sing / singing) in the library! 9． (Keep / Keeping) the classroom clean. 10． (Don’t / Can’t) run in the classroom. 考点二：情态动词should的用法 You should stop at the red light! 你应该在红灯时停下！ should 是情态动词，意为 “应该”，常用于表达建议、义务、责任或推测，后接动词原形，没有人称和数的变化。 1. 核心用法： (1)表达建议（语气委婉）：用于给他人提合理建议 例句：You should drink more water. 你应该多喝点水。 (2)表达义务 / 责任（语气稍强）：强调应尽的责任 例句：You should obey school rules. 你应该遵守校规。 (3)表达推测：基于逻辑或常识猜测可能性 例句：The film should be interesting. 这部电影应该会很有趣。 2. 否定形式： 否定形式为 should not，缩写为 shouldn’t，表示 “不应该做某事”。 例句：She shouldn’t be late for class. 她不应该上课迟到。 3. 疑问句结构： 疑问句结构：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. 例句：Should I read books here? 我应该在这里看书吗？ Yes, you should. / No, you shouldn’t. 大显身手 一、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) play football in the street. It’s dangerous. 3. ______ (should) her sister ______ (ride) too fast? 4. We shouldn’t ______ (push) in the crowd. 5. We ______ (should) skate on thin ice. 6. They ______ (should) shout in class. 二、按要求完成句子。 7. They should walk slowly in the street.（改为否定句） 8. You should walk down the stairs.（对画线部分提问） 9. Should I shout in the hospital?（作否定回答） 综合训练 一、选出每组单词中画线部分发音不同的一项。 ( ) 1. A. machine B. check C. child D. chess ( ) 2. A. chess B. chalk C. school D. child ( ) 3. A. chair B. chocolate C. character D. chicken ( ) 4. A. share B. chalk C. cheese D. March ( ) 5. A. March B. chicken C. chore D. child 二、根据所给内容，在横线上写出两个同类词或短语。 1. cinema bookshop ____________ ____________ 2. run push ____________ ____________ 3. window stair ____________ ____________ 4. chicken fish ____________ ____________ 5. No swimming No skating ____________ ____________ 三、单项选择。 ( ) 1. Don’t ______ on the chair. It’s not safe. A. stand B. stands C. standing ( ) 2. It’s dangerous ______ fast in the street. A. ride bikes B. to ride bikes C. riding bikes ( ) 3. —Can I eat snacks in the museum?—No, you can’t. The sign says “No ______”. A. eat B. eating C. eats ( ) 4. We should ______ careful in the crowd. Don’t push. A. be B. is C. are ( ) 5. The sign “Don’t run down the stairs.” is for ______. A. the park B. the street C. the classroom building 四、今天是校园安全日，Miss Wang 在和同学们探讨 “安全守则”。从方框中选出合适的内容，补全对话。 A. please don't run down the stairs B. I will walk slowly and keep to the right. C. Don't stand on the chair, Dongdong. D. We will be careful. E. I won't do that again. Miss Wang: Children, today is School Safety Day. Let's review some important safety rules at school. Baobao: OK, Miss Wang. 1. ________ Miss Wang: Good. 2. ________ It's dangerous (危险的). Dongdong: Oh, I'm sorry! 3. ________ Miss Wang: And Yangyang, 4. ________! You might fall and get hurt. Yangyang: All right, Miss Wang. 5. ________ Miss Wang: Well done, everyone. 五、选择合适的单词，补全短文。（填序号） A. crowd B. careful C. safe D. dangerous E. slowly The traffic (交通) lights are important. Red means "Stop". Yellow means "Wait", and green means "Go". If you don't look at the lights before crossing (穿过) the road, it's 1. ______. The cars should go 2. ______ in the 3. ______. In China, drivers drive on the right side of the road. In the US, drivers drive on the right side, too. But in England, it's 4. ______ for people to drive on the left. If you go to school on foot, you should be 5. ______ and look at the traffic lights. 六、【新语篇·影院安全守则】阅读电影院的安全守则，判断句子正 (T) 误 (F)。 Cinema Safety Rules · Walk slowly. Do not run. · No pushing. · No eating or drinking. · Be quiet. No shouting. · Sit on your seat. ( ) 1. We can run in the cinema. ( ) 2. Don’t push your friends in the cinema. ( ) 3. You can eat hamburgers here. ( ) 4. It’s OK to shout in the cinema. ( ) 5. You can sit on your seat in the cinema. 参考答案 【考点一】 1．A 2．C 3．A 4．A 5．A 6．go 7．Let’s 8．sing 9．Keep 10．Don’t 【考点二】 1. do；have 2. shouldn’t 3. Should；ride 4. push 5. shouldn’t 6. shouldn’t 7. They shouldn’t walk slowly in the street. 8. What should I do? 9. No, you shouldn’t. 【综合训练】 一、选出每组单词中画线部分发音不同的一项。 1. A 2. C 3. C 4. A 5. A 二、根据所给内容，在横线上写出两个同类词或短语。 1. library, school 2. walk, jump 3. wall, desk 4. cake, egg 5. No running, No pushing 三、单项选择。 1. A 2. B 3. B 4. A 5. C 四、今天是校园安全日，Miss Wang 在和同学们探讨 “安全守则”。从方框中选出合适的内容，补全对话。 1. B 2. C 3. E 4. A 5. D 五、选择合适的单词，补全短文。（填序号） 1. D 2. E 3. A 4. C 5. B 六、【新语篇·影院安全守则】阅读电影院的安全守则，判断句子正 (T) 误 (F)。 1. F 2. T 3. F 4. F 5. T 第 1 页 共 15 页 学科网（北京）股份有限公司 $