Module 5 A Lesson in a Lab Grammar课件(外研版必修1).pptVIP

Module 5 A Lesson in a Lab 语法 “比较” 一、形容词、副词比较级的构成：（分规则变化和不规则变化两种情况）[来源:学*科*网] （一）规则变化 构成方式 原级 比较级 short shorter large larger big thin bigger thinner happy happier difficult more difficult 单音节词在词尾加-er 以e节尾的单音节词在词尾加r 以一个元音字母加一个辅音字母的重读闭音节，双写词尾加er 以辅音加y结尾的词，把y变i 再加er 大多数双音节词和多音节词在前加more[来源:学*科*网] （二）不规则变化：不规则变化的形容词或副词几乎没有规律。 原级 比较级 good bad/ill far many/much little old well badly better worse farther, further more less older, elder better worse 比较形式 使用句型 A=B A…+as+原级+as B (A…+not +as/so +原级+as B) AB A…+more+adj/adv+than B（A超过B） AB A…+less+adj/adv+than B（A不如B） 二、比较级的基本用法： Eg. [来源:学*科*网] 1. Dick is as tall as his brother. 2. I can run as fast as you. 3. This dictionary is better than that one. 4. I can run faster than you. 5. This book is less interesting than that one. 三、比较级特殊用法： （一）、倍数的表达法 ①“倍数+形容词（或副词）的比较级+than+从句” ②“倍数+as+形容词或副词的原级+as+从句” ③“倍数+the size/height/length/width，etc.+of…” 翻译： 这辆小车的速度比那辆卡车快两倍。 The car runs twice faster than that truck. The car runs 3 times as fast as that truck. The car runs 3 times the speed of that truck. 三、比较级特殊用法： （二）、越来越…… ①“more and more +adj./adv.”或 ②“比较级+and+比较级” 翻译： 英语变得越来越重要了。 天气变得越来越冷了。 English is becoming more and more important. It is getting colder and colder. 三、比较级特殊用法： （三）、“越……，就越……” the +比较级，the+比较级 翻译： 你越努力，你就能取得越大的进步。 年龄越大，记忆力就会越差。 The harder you work, the greater progress you will make. The older we grow, the poorer our memory will become. 三、比较级特殊用法： （四）、no more than 和 no more … than的用法 1) no more than=not any more than=only，后跟名词或数词。教室里只有10个学生. 他不过是个孩子, 所以我根本不把他当回事. 2) no more... than.../not any more... than...表示前者和后者一样都不…… 杰克和约翰谁都不努力 这本书和那本书都没有趣. There are no more than ten students in the classroom. He is no more than a child, so I don’t take him too seriously. Jack works no harder than John. This book is no more interesting than that one. 三、比较级特殊用法： （五）、 not more than和not more... than…的用法 1) not more than+数词，=at most“至多，不超过” 教室里最多有10个学生. 最多有1000个人参加了那个会议. 2) not more... than…, 前者不比后者更……， 杰克不如约翰努力[来源:学*科*网]