Unit 4 The wonders of nature. Grammar Focus(4a-4d) 导学案2025-2026学年人教版英语八年级下册

Unit 4 The wonders of nature. Grammar Focus(4a-4d) 导学案

学习目标

1. 掌握形容词/副词比较级、最高级的用法，能正确读写大数字（长度、面积、高度单位）。
2. 能在语境中运用比较级、最高级描述地理事物特征，完成相关练习。
3. 学会用英语编写比较类问题，提升口语表达与合作交流能力。

一、课前预习

1. 形容词/副词比较级&最高级变化规则

规则	原级	比较级	最高级
一般情况	large	______	______
以e结尾	late	______	______
重读闭音节双写	big	______	______
辅音+y变i+er/est	easy	______	______
多音节词	amazing	______	______
不规则变化	far	______	______

2. 数字读写预习（写出英文表达）

5,895 → ________________________

25,768 → ________________________

4,000 → ________________________

337,000 → ________________________

二、课堂学习

任务1：Grammar Focus 观察与归纳（4a）

1. 阅读句子，圈出比较事物的形容词，划出比较动作的副词。
2. 归纳用法：

形容词最高级：the + 形容词最高级 + ______ / ______ ... 表示“……中最……的”

副词最高级：动词 + (the) + ______

重点结构：one of the + ______ + 复数名词（最……之一）

任务2：数字读写练习（4b）

完成句子，写出数字的表达：

1. Mount Kilimanjaro is ______ (five thousand, eight hundred and ninety-five) metres high.
2. ______ (twenty-five thousand, seven hundred and sixty-eight) cubic metres of water pours down Inga Falls each second.
3. The East African Rift Valley is about 4,000 ______ miles long.
4. The Taklimakan Desert has a total area of about 337,000 ______ square kilometres.

任务3：语篇综合填空（4c）

用方框中单词的正确形式填空：

large, amazing, far, close, loud

My friends and I visited Victoria Falls in Africa last year. Visiting one of the world’s ______ waterfalls was a magical experience. As we went ______ to the falls, the noise of the water slowly grew ______ and louder. Then, right before our eyes, the waterfall appeared. It went on for as ______ as the eye could see. Later, we sat in a special pool at the top of the falls. There, we felt the water rush past us and become a part of the waterfall. It was the scariest but also the ______ experience of our trip!

任务4：口语拓展练习（4d）

参考示例句型，编写关于地理事物/地点的比较类问题，与同伴问答：

•       What is the highest...?

•       Which park is bigger, ... or ...?

示例：