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课件网) Section A (Grammar Focus-4c) Unit 7 What's the highest mountian in the world Revision What’s the highest mountain in the world Qomolangma. How high is it It’s 8,848.86 meters high. in height Revision What’s the deepest salt lake in the world The Caspian Sea. How deep is it It’s 1,025 meters deep. in depth Revision What’s the largest desert in the world The Sahara. How large is it It’s 9,000,000 square kilometers in size. Revision What’s the longest river in the world The Nile. How long is it It’s 6,671 kilometers long. in length Revision What’s the longest river in China The Yangtze River. How long is it It’s about 6,300 kilometers long. Revision What’s the second longest river in China The Yellow River. How long is it It’s about 5,464 kilometers long. Grammar What’s the highest mountain in the world Qomolangma. How high is Qomolangma It’s 8848.86 meters high. It’s higher than any other mountain. Which is the deepest salt lake in the world The Caspian Sea is the deepest of all the salt lakes. Did you know that China is one of the oldest countries in the world Yes, I did. It’s much older than the US. 形容词副词的比较等级 形容词和副词通常有三种级别：原级（Positive form）：没有比较含义，“……”；比较级（Comparative form）：两者间比较，“更……”；最高级（Superlative form）：三者及三者以上比较，“最……”。 注意：某些形容词和副词只用原级，如：perfect，excellent，dead等。 形容词副词的比较级和最高级的用法 1.“比较级+than any other+可数名词单数”=“比较级+than the other+可数名词复数”表示“比其他任何……都……”, 表示最高级含义， 可与表示最高级的句子进行转换。可用于修饰形容词和副词比较级程度的词有：much, a little, even, a lot, a bit, far等。2.（the + ）最高级 + in/of 短语 意为“……中最……的”。3. one of the + 最高级 + 可数名词复数 + in/of 短语 意为“……中最……的……之一”。 4. the + 序数词 + 最高级 + 可数名词单数 + in/of 短语 意为“……在……中是第几……的……”（从第二开始）。5. Which/Who … + 最高级, A, B or C 意为“A，B，C中，哪个/谁最……？”。【特别提醒】(1)最高级前有物主代词、名词所有格等修饰时，其前不加the。(2)当most表示“非常”时，其前不加the。 规则变化 ①直接加 -er 或 -est tall—_____—_____ long—_____—_____ ②以不发音的字母e结尾的单词直接加 -r 或 -st ③以“辅音字母+-y”结尾的重读闭音节词，把y 变为i，再加 -er 或- est nice—_____—_____ heavy—_____—_____ taller tallest longer longest nicer nicest heavier heaviest 二、比较级和最高级的构成 ④以一个辅音字母结尾的重读闭音节 双写该辅音字母再加 -er或 -est ⑤部分双音节词和多音节词 分别在原级前加more构成比较级和most构成最高级 big—_____—_____ slowly—_____—_____ beautiful—_____—_____ bigger biggest more slowly most slowly more beautiful most beautiful 原级 比较级 最高级 good / well better best bad worse worst many/much more most little less least old older/elder oldest / eldest far farther (更远)/ further (进一步的) farthest / furthest 不规则变化 即时演练 一、用括号内所给单词的适当形式填空。 1. The weather is g ... ...
