广东省增城市小楼中学八年级英语上册Module2ScienceandtechnologyUnit4InventionsGrammar课件讲述.ppt

GrammarUnit 4 Look at the sentences: 1.With the light bulds, people can do as many things in the evening as they can in the daytime. 2.After the invention of the wheel, travelling became faster and more comfortable. 3.The wheel is perhaps the greatest invention in history. 形容词比较级和最高级规则变化 1. great — — few — — 2. wide — — nice — — 3. big — — fat — — 4. happy — — heavy — — 5. difficult — — beautiful — — 形容词比较级和最高级不规则变化： 原级------比较级------最高级? ??? good/(well)------ ??? many/much------　bad/(badly/ill)------ little -------------- 　 far-- ? 形容词前如加 less 和 least 则表示较不和最不 ??? important (重要）--- less important（较不重要） --- least important 最不重要（最不重要）? 形容词比较级和最高级用法： 1. 原级（同级）比较：as…as…; not as(so)…as… 　　We’ll give you as much help as we can. 　　She isn’t as(so)good at sports as before. 2.比较级：表示两者之间比…… 更……可用状语much, a little, even等修饰： He made fewer mistakes than I did. 　　He is even richer than I. 3. 高级：形容词最高级前必须加the, 副词最高级前常省略the，后面多用of……， in……短语表示范围： 　　It was the most/least interesting story . 　　He is the tallest of the three. Look at the school report: Read A aloud and finish A1 A2：Look at the map and answer A2：Look and answer as…as…否定not as/so… as…(Read and work out the rule) Look and Finish B1 : Look and Finish B2: More exercises:(原级） ( ) 1. This box is___ that one.??? A. heavy than B. so heavy than??? C. heavier as D. as heavy as ( ) 2. When we speak to people, we should be ______ .??? A. as polite as possible B. as polite as possibly??? C. as politely as possible D. as politely as possibly ( ) 3. This book is____ that one, but____ than that one. ??? A. as difficult as; expensive??? B. as more difficult as; more expensive??? C. as difficult as; more expensive??? D. more difficult as; as expensive ( ) 4. I think the story is not so ___ as that one.??? A. interesting B. interested C. more interesting D. most interesting More exercises:（