高中英语 Module 5 A Lesson in a Lab Section Ⅱ Grammar—比较等级学案（含解析）外研版必修1-外研版高一必修1英语学案

Module 5 A Lesson in a LabSection Ⅱ Grammar——比较等级[语法图解][课文原句感知]①The earth is fortynine times as large as the moon.②The earth is fortynine times larger than the moon.③This stone bridge is twice the length of the wood one.④The book is as interesting as that one.⑤It's getting brighter and brighter!⑥The closer you are, the more you'll see.⑦We need a piece which is much bigger than that.[语法领悟](1)例句①②③为倍数表达法，其结构分别是：句① 倍数＋ as ＋形容词＋ as ；句② 倍数＋比较级＋ than ；句③ 倍数＋ the ＋性质名词＋ of 。(2)例句④为原级比较，其结构是 as ＋形容词＋ as 。(3)例句⑤⑥⑦是比较级的表达。其中例句⑤的结构是 比较级＋ and ＋比较级 ；例句⑥的结构是 the ＋比较级， the ＋比较级 ；例句⑦中用了 much 修饰比较级。一、英语倍数表达法1．倍数表达法的三个常用句型(1)倍数＋as＋adj./adv.＋asThis big stone is three times as heavy as that one.这块大石头的重量是那一块的三倍。(2)倍数＋比较级＋thanThis hall is five times bigger than our classroom.这个大厅是我们教室的五倍大。(3)倍数＋the＋性质名词(size, height, width, depth, length 等)＋ofThis hill is four times the height of that small one.这座山的高度是那座小山的四倍。[名师点津]英语中，用 twice 或 double 表示两倍，三倍或三倍以上用基数词＋times, 如 three times, four times。2．倍数表达法的两个变体(1)倍数＋what 从句The rainfall this year is twice what it was last year.今年降雨量是去年的两倍。(2)倍数＋as many/much＋名词＋asWe have produced three times as many computers as we did last year.我们生产的计算机是去年的三倍多。[即学即练 1](1)一句多译这条街是那条街的四倍长。①This street is four times longer than that one.②This street is four times as long as that one.③This street is four times the length of that one.(2)句型转换④His books are three times as many as his younger sister's.→He has got three times as ...