Unit 6 Lesson 21 Snow Turns into Water（教学课件）英语北京版四年级上册（新教材）

Lesson twenty one, snow turns into water. It's so cold today. Yes, I can see your red nose. Look, there's eyes on the window. Wow, so beautiful. Why is their eyes? The room is warm and the glass is cold. The water and the air gets cold on the glass. IT turns into ice. Look, it's snowing outside. I love snow. Me too. Let's go out and have fun after class. Oh, no, the sun comes out. Snow turns into water. That's too bad. Listen and find . it's . so cold today. Yes, I can see your red nose. Look, there is eyes on the window. Wow, so beautiful. Why is their eyes? The room is warm and the glass is cold. The water in the air gets cold on the glass. IT turns into ice. Look, it's snowing outside. I love snow. Me too. Let's go out and have fun after class. Oh, no, the sun comes out T. Snow turns into water. That's too bad. Listen. choose and retail different me, hello, I miss the water. You can find me everywhere. Wow, the it's up over the sea is hot now I get very small. Ah, i'm so scared. I fly up into the air. Where am I? IT is cool here. Wow, I turned into water again. What am I going down? It's cold. Oh, no, I turned snow and ice. after. bad. glass. son. turn. What is the water cycle anyway? How does the rain? Where does IT come from? Water goes up. Water comes down. Water goes up. What IT comes down is, I know it's in the air. the sun. Ha, sure. IT becomes. Gall becomes, listen, everyone, a little water, we . call一个。So the vapor goes up and gets cold in the sky and turns back into water up there. So high fine water drops form to clouds to keep growing and making bigger clouds. Clouds are made from water. Listen, everyone is a little process we call. So the clouds keep forming with more and more drops getting bigger than what happens, do you think? You know, the drop start falling as rain or snow, the water comes back down. Listen, everyone is a little process we call. What the cycle what is cycle comes down. What comes down. What a cycle wa cycle what a cycle. 北京版 四年级上册 Unit 6 Get Close to Nature Lesson 21 Snow Turns into Water 在本课时主题图的帮助下，学生能够听、说、读词汇和句型；能在真实的语境中运用这些单词和句型描述水循环等自然现象的句型。 学习理解 在看、听、读、说活动中学习、理解对话内容，培养学生用英语思维的能力和初步运用英语交际的能力，使学生能够在生活情景中运用所学句型，达到描述水循环等自然现象的目的。 应用实践 通过多种活动提升学生听说技能。通过描述水变成冰这类自然现象的话题的牵引下的情景设置和角色表演和小组练习，巩固本节课关于自然知识的核心语言，学生能进一步去判断并思考表达观点，发展了口语技能。 迁移创新 【核心词汇】 glass, turn, after, sun, bad 【核心句型】 1. There is ice on the window. 2. Why is there ice? The room is warm, and the glass is cold. The water in the air gets cold on the glass. It turns into ice. 3. Let's go out and have fun after class. 核心知识点 Learning Objectives Lead - in Presentation Practice Summary Homework 目录 contents Part 01 Lead-in Let's enjoy Part 02 Presentation glass /ɡlɑːs / n. 玻璃 Vocabulary 【短语】a glass of milk 一杯牛奶 【用法】glasses 眼镜 【例句】I'm dying for a glass of water. 我真想喝杯水。 【拓展】turn on 打开 turn left/ right 左转/右转 【例句】Could you turn the TV up? 你能把电视机的音量开大些吗？ turn /tɜːn / v. 转向，转变 Vocabulary 【反义词】before 在......之前 【例句】I'll do my homework after supper. 晚饭后我要做家庭作业。 after ˈɑːftə(r)/ 在......之后 Vocabulary 【拓展】the sun 太阳 【拓展】sunshine 照耀 【例句】The earth moves round the sun. 地球围绕太阳旋转。 sun / sʌn / n. 太阳 Vocabulary 【反义词】good 好的 【短语】be bad for.... 对.......有害的 be good for ...对......有好处的 【例句】Howard is so bad at basketball. 霍华德的篮球打得不好。 bad /bæd/ adj. 糟糕的 Vocabulary Lesson 21 Snow Turns into Water 今天太冷了。 是的。我可以看见你的红鼻子。哈哈！ 看！窗户上结了冰。 哇，好美啊！为什么会结冰呢？ 房间很暖和，但玻璃却是冰冷的。空气中的水在玻璃上变冷后就凝结成了冰。 there be 句型 why 询问原因 turn into 变为 看，外面正在下雪。我喜欢雪。 我也是。下课后咱们出去玩玩吧。 哦，不！太阳出来了。雪变成了水。 go out 出去 have fun 玩得开心 after class 课后 那太糟糕了！ come out 出来 Listen and find. cold turns into ice turns into water Listen, choose and retell B A C Listen, choose and retell hot fly turn into the snow and ice cold turn into the water cool Let's practice water water vapor water snow Why? Let's practice water water vapor water snow It's hot. The water fly up into the air. It turns into water vapor(水蒸气). hot Let's practice water water vapor water snow It's cool. The water vapor(水蒸气) turns into water again. hot cool Let's practice water water vapor water snow It's cold. The water turns into snow. hot cool cold Let's practice water water vapor water snow hot cool cold warm It's warm. The snow turns into water again. Think and say 哦，今天太热了。我的冰块正在融化成...... 别担心。我们把冰放在这里吧。 Think and say 清晨时分，叶子上有一些水珠。你知道原因吗？ 让我想想…… Part 03 Practice There is ice on the window. There is some water on the leaves in the early morning. There be 句型，用于表示 “某地存在某物” 基本结构拆解 核心公式：There + be 动词（is/are）+ 主语 + 地点状语 Language points 1）be 动词的选择规则 ①主语为不可数名词（water/ice/milk/air 等）或单数可数名词（a book/a bird 等） → 用 is。 例：There is a apple on the table.（桌上有一个苹果） ② 主语为复数可数名词（books/birds/flowers 等）→ 用 are。 例：There are three birds in the tree.（树上有三只鸟） 补充：some 可修饰不可数名词（some water）或复数可数名词（some books），搭配 be 动词时需看后面的名词性质。 Language points 句型补全（用 is/are 填空） There ________ some milk in the glass. There ________ three pens and a ruler in the pencil-box. There ________ a beautiful flower in the garden. There ________ some bread on the plate. There ________ no water in the bottle. is are is is is Why is there ice? The room is warm, and the glass is cold. The water in the air gets cold on the glass. It turns into ice. 疑问句型：Why + is there 句型（询问存在原因） 结构：Why + be 动词 + there + 主语？ 原句：Why is there ice?（为什么会有冰？） 解析：Why 引导原因提问，主语 ice 是不可数名词，be 动词用 is，整体用于询问 “冰存在的原因”。 Language points It turns into ice. The sun comes out. Snow turns into water. 状态变化句型：主语 + turn (s) into + 另一物质（表 “变成”） 结构：主语 + turn (s) + into + 名词（turn into 是固定短语， 表 “转变为某种状态 / 物质” ） 主语为单数 / 不可数名词时，turn 用三单形式 turns；复数主语用原形。 原句解析： It turns into ice.（它变成了冰。）→ it 指代 “变凉的水”，用 turns。 Snow turns into water.（雪变成了水。）→ snow 是不可数名词，用 turns。 Language points 解释句型：状态描述 + 变化过程 状态描述：主语 + be 动词 + 形容词（说明事物的特征，为变化做铺垫） 例：The room is warm, and the glass is cold.（房间里很暖和，而玻璃很凉） 变化过程：主语 + get/turn into + 名词 / 形容词（表示 “变得……” 或 “变成……”） 例：The water gets cold on the glass.（空气中的水在玻璃上变凉）； It turns into ice.（它变成了冰） Language points “get” 与 “turn into” 的区别 get：侧重 “逐渐变得”，后接形容词（get cold 变凉、get hot 变热）。 turn into：侧重 “转化为另一种形态 / 事物”，后接名词（turn into ice 变成冰、turn into water 变成水）。 Language points 句型补全（用括号内单词的适当形式填空） 1. Why ________ there ________（rain）today? 2. The air is cool, and the water ________（get）cold. It ________（turn）into ice. 3. Why ________ there ________（fog）in the morning? 4. The sun ________（come）out, and the ice ________（turn）into water. 5. The temperature is low, and the water in the river ________（become）ice. is rain is fog comes turns becomes gets turns Let's go out and have fun after class. 1. 句型结构 Let's + 并列谓语短语（动词原形）+ 时间 / 目的状语 Let's = Let us（让我们），后接动词原形，表 “提议一起做某事”。 并列谓语：go out（出去）和 have fun（玩乐）用 and 连接，表连续动作。 时间状语：after class（下课后），明确动作发生的时间。 Language points 用于向他人发出共同行动的邀请或提议，语气亲切自然。 否定式：Let's not + 动词原形 （Let's not stay at home. 我们别待在家里了）。 词汇搭配 go out：外出（特指离开室内去活动）。 have fun：玩得开心，同义替换有 have a good time/enjoy oneself。 时间状语替换：after school（放学后）、on weekends（周末） in the evening（晚上） Language points 句型仿写（根据提示完成句子） 1. Let's ____________（去公园）and ____________（放风筝）this Sunday. 2. Let's not ___________（看电视）. 3. Let's ________________（听音乐）and ______（聊天）. 4. Let's ___________（吃晚饭）at that new restaurant and __________（看电影）afterwards. go to the park listen to music chant have dinner see a film fly kites watch TV Assessment （课堂检测） 用括号内词汇的适当形式填空，补全句型（每词限用一次） 1. There is ______ on the ______. (sun, glass) 2. Why is the fruit ______? Because it's not in the ______. (bad, sun) 3. Let's ______ on the grass ______ school. (after, turn) 4. The water ______ into steam when it's hot. (turn) sun glass bad sun turn after turns 句型补全（用 is/are 或 some/any 填空） 1. There ________ ________ snow on the ground in winter. 2. There ________ a bird in the sky. Can you see it? 3. ________ there ________ milk in the bottle? I want to drink it. 4. There ________ many students in the classroom. They are reading. 5. There ________ not ________ juice in the glass. Let's buy some. is some is Is any are is any 句型补全（用 is/are、get/gets、turn/turns into 填空） 1. Why ________ there water on the floor? 2. The weather is cold, and the water ________ into ice. 3. There ________ some clouds in the sky. Why ________ it raining? 4. The sun gets hot, and the snow ________ ________ water. 5. The milk ________ warm when we put it near the fire. is turns are is turns into gets 情景运用（根据场景补全对话） A: The exam is over! ________________（提议去购物）and _____________（吃冰淇淋）? B: Great idea! When shall we meet? A: Let's meet at the school gate ____________________（下午 3 点）. B: OK. I'll bring my wallet. Let's ___________（不要迟到）! Let’s go shopping have ice creams at three in the afternoon not be late 根据对话场景，用核心词汇和句型补全内容，使对话通顺合理 A: Look! __________________________ (含 glass) B: Wow, that's interesting. _____________________________ (含 why) A:Because____________________________________________________________________________________ (用 turn into) B: Oh, I see. __________________________ A: Good idea! But let's not go when the ______ is too strong. It's bad for our skin. B: Sure! Let's meet at the gate after class. There is some water on the glass. the sun Why is there water on the glass? the room is warm, and the glass is cold. The water in the air turns into Let's go out and play after class. small drops on the glass. Part 04 Summary glass, turn, after, sun, bad Summary Words Sentences 1. There is ice on the window. 2. Why is there ice? The room is warm, and the glass is cold. The water in the air gets cold on the glass. It turns into ice. 3. Let's go out and have fun after class. Part 05 Homework 基础：模仿课文录音，跟读课文中的对话，熟悉本课重点自然现象的句型。 提高：与同学一起分组用句型 提问和回答，必须包含核心词汇。 示例：A: “Why is the fruit bad?” B: “The sun is too strong, and the fruit gets hot. It turns into bad fruit.”。 拓展：根据本课的课文内容，写出水循环的句型，并且把自己写的内容分享给爸爸妈妈。 Homework 北京版 四年级上册 Thanks for listening! Lavf59.14.100 null 1320.0 null 1560.0 null 1253.8771 Lesson 21 null, track 1 2025 149009.17 $