(
课件网) Section A (4a~4d) Unit 4 The Wonders of Nature 学习目标 1 2 3 能准确拼写并认读大数字表达，掌握数词单位的组合规则。 能识别语篇中表比较的形容词/副词原级、比较级和最高级，理解其语义功能。 能在具体语境中运用形容词/副词比较等级以及大数字的表达。 Let’s talk What’s the longest river in China How long is it The Yangtze River is the longest river in China. The Yangtze River travels the farthest. It is about 6,300 kilometres long. 形容词最高级longest修饰名词 river 副词最高级farthest修饰动词 travels 4a Read the sentences. Circle the adjectives which compare things. Underline the adverbs which compare actions. What is the biggest desert in the world It is the Sahara Desert. How big is it It is about 9,000,000 square kilometres in size. Where is the deepest point in the ocean It is in the Mariana Trench. How deep is it It is about 11,000 metres deep. Some deep-sea animals are blind, but they can “see” as well as others. Mount Qomolangma is one of the greatest wonders of the world, and it is still growing taller. The Yangtze River travels the farthest in China and is about 6,300 kilometres long. 形容词：用来描述名词的特征，在句中常作定语或表语。 副词：用来描述动词、形容词或其他副词，在句中常作状语。 比较等级： 原级：表示 “和…… 一样”，结构为 as + 原级 + as。 比较级：表示 “两者之间更……”，常与 than 连用。 最高级：表示 “三者及以上范围中最……”，常与 the 或 in/of... 连用。 形容词最高级前必须加 the（如 the biggest），副词最高级前的 the 可以省略（如 travels (the) farthest）。 Let’s summarize Read the numbers. How big is the Sahara Desert It is about 9,000,000 square kilometres in size. How deep is the Mariana Trench It is about 11,000 metres deep. The Yangtze River travels the farthest in China and is about 6,300 kilometres long. 9,000,000 11,000 6,300 nine million eleven thousand six thousand three hundred Let’s summarize 英语中数字的读法遵循 “三位一组” 的原则，从右往左每三位用逗号隔开，每一组对应一个大单位。 thousand（千）：第 1 组（右数 1-3 位） million（百万）：第 2 组（右数 4-6 位） billion（十亿）：第 3 组（右数 7-9 位） 例：9,000,000 读作 nine million 例：11,000 读作 eleven thousand Let’s summarize 三位数内部读法 每组三位数（000-999）的读法遵循以下规则： 百位 + and + 十位 / 个位（英式英语），美式英语中 and 常省略。 例：123 → one hundred (and) twenty-three 十位和个位之间用连字符 - 连接。 例：45 → forty-five 例：789 → seven hundred (and) eighty-nine Let’s summarize 以 123456789 为例，分组：从右往左三位一组 → 123, 456, 789 读每组： 123 → one hundred (and) twenty-three 456 → four hundred (and) fifty-six 789 → seven hundred (and) eighty-nine 加单位：每组后加上对应的单位：123 million, 456 thousand, 789 整合：one hundred (and) twenty-three million, four hundred (and) fifty-six thousand, seven hundred (and) eighty-nine Let’s summarize 零的处理： 组内全为零时，该组及单位省略。 例：9,000,000 → nine million（省略了后面的 000 thousand） 组内有零，按正常数字读出。 例：105 → one h ... ...
