Unit 7 How do things change? （知识清单）-2025-2026学年 沪教版英语四年级下册

Unit 7 How do things change? 一、核心词汇 1. 物质状态相关 · 名词：liquid (液体), solid (固体), gas (气体), steam (水蒸气), ice (冰), cream (奶油), sugar (糖), salt (盐), freezer (冰箱), mixture (混合物), pot (锅), carrot (胡萝卜), chicken (鸡肉), tomato (西红柿), orange (橙子), juice (果汁), soup (汤) · 动词：heat (加热), melt (融化), freeze (结冰), boil (沸腾), change (变化), cut (切), add (添加), shake (摇晃), taste (尝起来) · 形容词：cold (冷的), warm (温暖的), hungry (饿的), thirsty (渴的), great (极好的) 2. 场景相关 party (派对), classroom (教室), family day (家庭日) 二、核心句子 1. 物质变化描述 1. Steam is a gas. 2. The water is a liquid. Now it’s freezing. It’s changing into a solid. 3. The ice is a solid. Now it’s melting. It’s changing into a liquid. 4. The water is a liquid. Now it’s boiling. It’s changing into a gas. 5. The ice is freezing the mixture! 2. 提议与回应 1. Shall we make some more? 2. Shall we cut the oranges first? 3. Sure! / OK. / Good idea! 三、核心语法 1. 情态提议句型 结构：Shall we + 动词原形...? （用于提出建议） 常见回应：Sure! / OK. / Good idea! 例句：1. Shall we wash some carrots too? 2. Shall we cut the oranges first? 2. 现在进行时表变化 结构：主语 + be动词 + changing into + 物质状态 例句：1. It’s changing into a solid. 2. It’s changing into a liquid. 3. It’s changing into a gas. 3. 祈使句表指令 用法：用于描述制作步骤，以动词原形开头 例句：1. Put the chicken in the pot. 2. Add the carrots. 3. Cut the tomatoes and add some sugar. 四、练习题及答案 词汇分类填空 题目：根据词性，将下列单词填入对应横线上（每词用一次）：heat, cold, steam, cut, soup, warm 名词：__________、__________ 动词：__________、__________ 形容词：__________、__________ 答案：名词：steam、soup；动词：heat、cut；形容词：cold、warm 句型转换（改为Shall we...提议句） 题目：根据句意，将下列句子改为提议句型 1. Let's make some juice. → __________ 2. We can boil the water first. → __________ 3. Let's add some salt to the soup. → __________ 答案：1. Shall we make some juice? 2. Shall we boil the water first? 3. Shall we add some salt to the soup? 现在进行时表变化造句 题目：根据提示，用“主语 + be + changing into + 物质状态”造句 1. the ice (liquid) → __________ 2. the water (gas) → __________ 3. the steam (liquid) → __________ 答案：1. The ice is changing into a liquid. 2. The water is changing into a gas. 3. The steam is changing into a liquid. 祈使句补全 题目：补全下列祈使句，完成果汁制作步骤 1. __________ the oranges (切橙子) 2. __________ some water to the juice (往果汁里加些水) 3. __________ the juice well (把果汁摇匀) 答案：1. Cut 2. Add 3. Shake 阅读理解 题目：阅读短文，判断正（T）误（F） It's family day. Lucy and her mom are making ice cream. First, they get two plastic bags. Then they put sugar and cream in the small bag. Next, they put salt and ice in the big bag, and put the small bag in it. Finally, they shake the big bag. The mixture is freezing. Soon, the ice cream is ready. It tastes great! 1. Lucy and her mom are making soup. ( ) 2. They put sugar and cream in the small bag. ( ) 3. They don't use ice. ( ) 4. The ice cream tastes good. ( ) 答案：1. F 2. T 3. F 4. T 翻译题 题目：将下列句子翻译成英语 1. 水是液体，它正在沸腾，变成气体。 → __________ 2. 我们先切胡萝卜好吗？ → __________ 3. 冰正在融化，变成水。 → __________ 答案：1. The water is a liquid. It's boiling and changing into a gas. 2. Shall we cut the carrots first? 3. The ice is melting and changing into water. 学科网（北京）股份有限公司 $