Unit 2 Clean our classroom Cartoon 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 Cartoon time 知识点讲解 + 同步练习 句子 1：Let's clean our classroom! 知识点：Let's = Let us，是提出建议的祈使句，后接动词原形，意为 “让我们…… 吧”。 结构：Let's + 动词原形 + 其他 常见答语：Good idea! / Great! / OK! ( ) 1. Let's ____our classroom. A. cleans B. clean C. cleaning ( )2. Let's ____to the park. A. go B. goes C. going ( )3. —Let's play football. —____ A. Good idea! B. Thank you. C. Sorry. ( )4. Let's ____the window. A. opens B. opening C. open ( )5. Let's ____a cake for Mum. A. make B. makes C. making 句子 2：Good idea! 知识点：口语高频表达，用于赞同他人的建议，意为 “好主意！”，同义表达有Great! / Sounds good! / Wonderful!。 ( )1. —Let's read books. —____ A. Good idea! B. Goodbye. C. Excuse me. ( )2. —Let's draw a picture. —____ A. I'm fine. B. Great! C. Thank you. ( )3. —Let's clean the room. —____ A. Sounds good! B. You're welcome. C. See you. ( )4. —Let's go swimming. —____ A. Happy birthday! B. Wonderful! C. Good night. ( )5. —Let's have a picnic. —____ A. Not at all. B. Good idea! C. How are you? 句子 3：Sam, sweep the floor, please. 知识点 1：肯定祈使句，以动词原形开头，用于发出指令 / 请求，句末加please表礼貌。 知识点 2：固定短语sweep the floor，意为 “扫地”，是家务类常用搭配。 ( )1. ____the floor, please. A. Sweeps B. Sweep C. Sweeping ( )2. Sam, ____the door, please. A. close B. closes C. closing ( )3. —Sweep the floor, please. —____ A. OK. B. Good idea. C. Hello. ( )4. Let's ____the floor. A. sweeps B. sweep C. sweeping ( )5. —What can you do? —I can ____the floor. A. sweeps B. sweep C. sweeping 句子 4：OK. 知识点：口语万能应答语，可回应指令、请求、建议等，意为 “好的；没问题”。 ( )1. —Clean your desk, please. —____ A. OK. B. Good idea. C. Hi. ( )2. —Let's go home. —____ A. OK. B. Thank you. C. Nice to meet you. ( )3. —Open the book, please. —____ A. Goodbye. B. OK. C. You're welcome. ( )4. —Pass me the pen, please. —____ A. OK. B. How are you? C. Good morning. ( )5. —Let's watch TV. —____ A. Sorry. B. OK. C. Excuse me. 句子 5：Please clean your desk and chair, Max. 知识点 1：礼貌祈使句，Please + 动词原形 + 其他，意为 “请……”。 知识点 2：your是形容词性物主代词，后接名词，意为 “你的 / 你们的”。 知识点 3：and是并列连词，连接并列名词，意为 “和”。 ( )1. Please ____your desk. A. clean B. cleans C. cleaning ( )2. ____your book, please. A. Opens B. Open C. Opening ( )3. This is ____bag. A. you B. your C. yours ( )4. I have a pen ____a pencil. A. and B. but C. or ( )5. Please clean ____chair. A. you B. your C. yours 句子 6：Look! That desk is dirty! 知识点 1：Look!是引起注意的感叹语，意为 “看！”，后接句子描述看到的内容。 知识点 2：that是指示代词，指代远处的单数事物，意为 “那个”，后接单数名词。 知识点 3：dirty是形容词，意为 “脏的”，在句中作表语，结构：主语 + be动词 + 形容词。 ( )1. ____! A bird! A. Look B. Look at C. Looks ( )2. ____is a big desk. A. This B. That C. These ( )3. The room ____dirty. A. am B. is C. are ( )4. My shoes ____dirty. A. am B. is C. are ( )5. —Look at my desk. —It's ____ A. clean B. a clean C. cleans 句子 7：Oh, it's my desk ... 知识点 1：it's = it is，意为 “它是”，用于指代前文提到的事物（that desk）。 知识点 2：my是形容词性物主代词，后接名词，意为 “我的”。 ( )1. ____my book. A. It B. It's C. Its ( )2. This is ____pen. A. I B. me C. my ( )3. —What's this? —____a desk. A. It B. It's C. Its ( )4. ____bag is red. A. My B. I C. Me ( )5. —Is this your desk? —Yes, ____my desk. A. it B. it's C. its 参考答案 句子 1 1.B 2. A 3. A 4. C 5. A 句子 2 1.A 2. B 3. A 4. B 5. B 句子 3 1.B 2. A 3. A 4. B 5. B 句子 4 1.A 2. A 3. B 4. A 5. B 句子 5 1.A 2. B 3. B 4. A 5. B 句子 6 1.A 2. B 3. B 4. C 5. A 句子 7 1.B 2. C 3. B 4. A 5. B 学科网（北京）股份有限公司 $