Unit 2 Clean our classroom Story time 知识点讲解（同步练）-2025-2026学年译林版（三起）英语三年级下册

新译林3B Unit 2 Clean our classroom Story time 知识点讲解 (同步练) 句子 1：Our classroom is dirty. Let's clean it. 知识点 1：dirty 是形容词，意为 “脏的”，在句中作表语，结构为 “主语 + be 动词 + 形容词”。 知识点 2：Let's + 动词原形是祈使句表建议的结构，clean 是动词，意为 “打扫；清洁”，it 在此处指代前文的 classroom。 ( ) 1. The window is ______. (脏的) A. dirty B. clean C. big ( )2. ______ clean the desk. A. Let we B. Let's C. Lets ( )3. My room ______ dirty now. A. am B. is C. are ( )4. Let's ______ the door. A. opens B. open C. opening ( )5. The pen is ______. (干净的) A. dirty B. new C. clean 句子 2：I can clean the blackboard. 知识点 1：can 是情态动词，后接动词原形，表示 “能；可以”。 知识点 2：clean the blackboard 是固定搭配，意为 “擦黑板”，blackboard 是合成名词，意为 “黑板”。 ( )1. I ______ sing a song. A. can B. cans C. can to ( )2. She can ______ the tree. A. climbs B. climb C. climbing ( )3. —What can you do? —I can ______. A. sweeps the floor B. sweep the floor C. sweeping the floor ( )4. He can ______ a cake. A. makes B. make C. making ( )5. They can ______ the window. A. clean B. cleans C. cleaning 句子 3：Me too! 知识点：口语常用表达，用于表达与他人相同的观点 / 行为，意为 “我也是；我也一样”，对应前文的肯定句。 ( )1. —I like apples. —______ A. Me too! B. Me neither. C. I too. ( )2. —I can dance. —______ A. Me too! B. I too. C. Me either. ( )3. —I can read books. —______ A. Me too! B. I can too. C. Me neither. ( )4. —I like red. —______ A. Me too! B. I too. C. Me either. ( )5. —I can draw. —______ A. Me too! B. I too. C. Me neither. 句子 4：Let's sweep the floor. 知识点 1：sweep the floor是固定短语，意为 “扫地”，sweep 是动词，意为 “扫；打扫”。 知识点 2：肯定祈使句以动词原形开头，用于发出指令、请求。 ( )1. ______ the floor, please. A. Sweeps B. Sweep C. Sweeping ( )2. Let's ______ the table. A. cleans B. clean C. cleaning ( )3. ______ the door, please. A. Close B. Closes C. Closing ( )4. I can ______ the floor. A. sweeps B. sweep C. sweeping ( )5. Let's ______ the chair. A. moves B. move C. moving 句子 5：All right. 知识点：口语常用应答语，用于回应他人的建议 / 请求，意为 “好的；行”，与 OK 用法相近。 ( )1. —Let's clean the room. —______ A. All right. B. Thank you. C. Sorry. ( )2. —Please open the book. —______ A. All right. B. Goodbye. C. Hello. ( )3. —Let's go to school. —______ A. All right. B. See you. C. Excuse me. ( )4. —Pass me the ruler. —______ A. All right. B. How are you? C. Good morning. ( )5. —Let's draw a picture. —______ A. All right. B. Nice to meet you. C. Thank you. 句子 6：Please close the window, Mike. 知识点 1：Please + 动词原形 + 其他 是礼貌祈使句结构，意为 “请……”。 知识点 2：close 是动词，意为 “关闭；关上”，window 是名词，意为 “窗户”。 ( )1. Please ______ the door. A. closes B. close C. closing ( )2. ______ open the window, please. A. Not B. Don't C. Doesn't ( )3. Please ______ the book. A. close B. closes C. closing ( )4. Don't ______ the desk. A. close B. closes C. closing ( )5. Please ______ the bag. A. close B. closes C. closing 句子 7：Thanks, Mike. Our classroom is clean now. 知识点 1：Thanks 是口语中简短的感谢表达，意为 “谢谢”，等同于 Thank you。 知识点 2：clean 在此处是形容词，意为 “干净的”；now 是副词，意为 “现在”，作时间状语。 ( )1. ______ you. (谢谢) A. Thank B. Thanks C. Thanking ( )2. The classroom is ______. (干净的) A. dirty B. clean C. small ( )3. I am happy ______. A. now B. then C. last ( )4. —Thank you. —______ A. Thanks. B. You're welcome. C. OK. ( )5. The room is ______ now. A. clean B. dirty C. big 句子 8：Yes. Let's keep it clean. 知识点 1：keep + 宾语 + 形容词 是固定结构，意为 “使某物保持某种状态”。 知识点 2：keep 是动词，意为 “保持；保留”，it 指代前文的 classroom。 ( )1. Let's keep the room ______. (整洁的) A. tidy B. dirty C. small ( )2. Please keep the pen ______. (新的) A. old B. new C. clean ( )3. Let's keep the desk ______. (干净的) A. dirty B. clean C. big ( )4. Keep the door ______. (开着的) A. open B. close C. closed ( )5. Let's keep the book ______. (旧的) A. new B. old C. clean 参考答案 句子 1 1. A 2. B 3. B 4. B 5. C 句子 2 1. A 2. B 3. B 4. B 5. A 句子 3 1. A 2. A 3. A 4. A 5. A 句子 4 1. B 2. B 3. A 4. B 5. B 句子 5 1. A 2. A 3. A 4. A 5. A 句子 6 1. B 2. B 3. A 4. A 5. A 句子 7 1. A 2. B 3. A 4. B 5. B 句子 8 1. A 2. B 3. B 4. A 5. B 学科网（北京）股份有限公司 $