Unit 7What's the highest mountain in the world?(The third period)Grammar focus— What’s the highest mountain in the world?— Qomolangma.— How high is Qomolangma?— It’s 8,844.43 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. 大多数形容词有三个级。 1. 原级:Structure : as ... as... 像..….一样 e.g. Mary is as tall as Alice. 2. 比较级 (用两者之间的比较):Structure：形容词比较级＋ than ... e.g. This box is bigger than that one. 形容词和副词的比较级和最高级3. 最高级(用三者或三者以上的比较):Structure: the + 形容词的最高级＋of / in ... e.g. Alan is the tallest in our class. He is the most popular in our school. 规则变化 1) 一般情况下，单音节或双音节的形容词/副词比较级＋er， 最高级＋est。如: clever — cleverer — cleverest short — shorter — shortest small — smaller — smallest形容词、副词的比较级和最高级的构成规则变化和不规则变化2) 以e结尾的词，比较级＋r，最高级＋st 即可。 如：nice — nicer — nicest cute — cuter — cutest large — larger — largest 3) 以辅音字母＋y结尾的变y为i＋er或est 如: easy — easier — easiest happy — happier — hap |
