Unit4 grammar学案2026-2027学年沪教版八年级英语上册

八年级上册 U4 Inventions 语法探究课学案 U4 语法探究课学案 2026—2027学年沪教版八年级英语上册 班级 __________ 姓名 __________ 日期 __________ 教材依据：第57—58页 Grammar。建议课时：40分钟。 本课任务：依据试验数据为校园展览选择模型。重点是 good、bad、far 的比较级和最高级，以及 (not) as ... as；难点是比较对象、原级与数量表达。 一 先看句子 再发现规则 7分钟 Read the sentences. Underline the comparison words and circle the two things or groups being compared. ① Model B is better than Model A. ② Model C is the best of the three. ③ The old design is worse than the new one. ④ This is the worst design in the test. ⑤ Model B travels farther than Model A. ⑥ Model C travels the farthest of the three. 原级 比较级 最高级 good ________ ________ bad ________ ________ far ________ / ________ ________ / ________ 1. We often use __________ after a comparative form when naming the second object. 2. We usually put __________ before a superlative adjective. A superlative compares one with a whole group. 二 一样与不一样 6分钟 Observe: Box A is as heavy as Box B. Box C is not as heavy as Box A. Observe: A holds as many books as B. A uses as much water as B. 3. as + adjective in its __________ form + as 4. as __________ + plural countable noun + as 5. as __________ + uncountable noun + as 想一想：“C is not as heavy as A” means C is heavier / lighter than A. Circle one. 提示：比较实际距离时，farther / further 和 farthest / furthest 都可用。本课不要求区分抽象意义的 further。 三 让规则经得起数据检验 11分钟 The science club tested three model carts under the same conditions. These are practice data, not real product results. Higher design scores mean better designs. 项目 A B C Distance / m 6 9 12 Design score / 10 6 8 9 Mass / g 200 200 300 Books carried 4 4 6 Use the data to complete each sentence. Write a full comparison where needed. 1. B has a __________ (good) design than A. 2. C has the __________ (good) design of the three. 3. A has a __________ (bad) design than B. 4. A has the __________ (bad) design of the three. 5. B travels __________ (far) than A. 6. C travels the __________ (far) of the three. 7. A is as __________ (heavy) as B. 8. B is not as __________ (heavy) as C. 9. A carries as __________ books as B. 10. Two washing models each use 2 litres of water. X uses as __________ water as Y. 四 修理比较句 6分钟 Each sentence has ONE comparison error. Correct it and name the rule briefly in Chinese or English. 1. Model B is more better than Model A. ________________________________________________________________________________ 2. Model A is as heavier as Model B. ________________________________________________________________________________ 3. Model A carries as much books as Model B. ________________________________________________________________________________ 4. Model C has best design of the three. ________________________________________________________________________________ 五 谁最适合我们的展览 7分钟 The display box can hold a cart of no more than 250 g. The cart must carry at least four books. Among the carts that meet BOTH requirements, choose the one that travels farther. 1. Circle the carts that meet both requirements: A B C 2. Choose a cart and explain your decision in THREE sentences. Use better or farther in one sentence and as ... as / not as ... as in another. We should choose Model ____ . ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ 3. A classmate says, “C travels the farthest, so C must be the best choice.” What information has the classmate missed? ________________________________________________________________________________ ________________________________________________________________________________ 句首支架：Both ... and ... meet ... / B is as ... as ... / However, C ... 六 离堂检验 3分钟 1. Of the three plans, this is the __________ (bad). 2. This box holds as __________ pencils as that one. 3. Rewrite without changing the meaning: B is lighter than C. B is not _______________________________________________. 4. Tell a classmate one rule you discovered today. Give your own example. ________________________________________________________________________________ ________________________________________________________________________________ 课后巩固 Compare two real objects at home. Write one sentence about an equal feature and one about a difference. Use facts you can check. 不需要上网，也不需要购买新物品。 My two objects: ______________________________________________ Equal feature: ________________________________________________ Difference: __________________________________________________ 自查：比较对象清楚 □　as 后用了原级 □　many / much 与名词相符 □ 参考答案与教学提示 一 good—better—best；bad—worse—worst；far—farther / further—farthest / furthest。1. than；2. the。观察题比较对象：B与A；C与三个模型；old design与new design；this design与测试中的所有设计；B与A；C与三个模型。 二 3. base；4. many；5. much；lighter。提醒：not as heavy as 表示“不如……重”，比较方向不能反过来。 三 1 better；2 best；3 worse；4 worst；5 farther / further；6 farthest / furthest；7 heavy；8 heavy；9 many；10 much。good / bad 在此依据明确的设计评分比较，不代表所有方面都更好或更差。 四 1. 删除 more，保留 better：不重复添加比较级标记。2. heavier 改 heavy：as ... as 中使用原级。3. much 改 many：books 为可数名词复数。4. best 前加 the：此处形容词最高级前用 the。 五 1. A、B。C 的质量为300 g，超过250 g限制。2. 示例：We should choose Model B. It has a better design than A and travels farther. It is as heavy as A and carries as many books as A. 允许三句或四句，只要满足题意。 五 3. C is too heavy for the display box. 最远不自动等于最适合；先判断限制条件，再比较合格方案。 六 1 worst；2 many；3 as heavy as C；4 开放答案。例：We use the base form between as and as. My ruler is as long as yours. 教学安排与评价 观察阶段先让学生找句子中的线索，再补规则。第3题组独立完成；核对时要求说出“比较什么、和谁比较”。第5部分只安排一次约1分钟同桌交流。 选择任务6分：筛选符合条件的模型2分；选择B并引用准确数据1分；使用一处比较级1分；使用一处同级比较1分；解释C为何不合适1分。 学生若用 fewer、less 或 more 构造正确比较，可认可表达；仍请其另写一个本课目标结构。课后题只评价数据可信、对象一致与结构准确，不要求昂贵或复杂的发明。 第 页 学科网（北京）股份有限公司 $