英语人教版八年级下册unit 7Grammar Focus4a-4c.doc

人教版八年级下册教学设计】Unit 7 Whats the highest mountain in the world ？Section A Period 4 (Grammar Focus4c) （安徽省临泉第三中学 袁之武） Teaching aims and demands:1. The Comparative and Superlative Degrees of Adjectives2. Guide students to use the Comparative and Superlative Degrees of Adjectives correctlyTeaching methods:1. Task-based teaching method.2. Communicative teaching method.Teaching procedures:Step 1. OrganizationGreet the class as usual.Step 2.RevisionReview the contents taught in the last period.Step 3.PresentationThe Comparative and Superlative Degrees of Adjectives(形容词和副词的比较级和最高级)大多数形容词有三个级。 1. 原级:Structure : as . as. 像.一样 e.g. Tim is as tall as Tom. 2. 比较级 (用于两者之间的比较):Structure：形容词比较级 than . e.g. This box is bigger than that one.3. 最高级(用于三者或三者以上的比较):Structure: the + 形容词的最高级of / in . e.g. Tom is the heaviest in our class. He is the most popular in our school.形容词、副词的比较级和最高级规则变化和不规则变化规则变化 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 few fewer fewest small smaller smallest 等。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ier或est 如: easy easier easiest happy happier happiest 再如：early, busy, heavy, dirty, lazy 也如此。4) 重读闭音节，单辅音结尾的，双写这个辅音字母er 或 est的词： fat fatter fattest thin thinner thinnest hot hotter hottest red redder reddest wet wetter wettest5) 多音节和部分双音节的词需要在形容词原级前more 构成比较级，the most 构成最高级。如： beautiful more beautiful the most beautiful 又如: delicious, popular, important, interesting, expensive, creative双音节的词如: careful more careful the most careful useful more useful the most useful少数单音节词也是这样，如： pleased more pleased the most pleased tired more tired the most tired b) 不规则变化： good better best well better best bad worse worst many/much more mostfar farther farthest (距离远) far further furthest (程度深) old elder eldest (长幼) old older oldest (年龄)最高级的用法1. 三者或三者以上相比，表示最高程度时，用“the + 最高级”的结构表示。这种句式一般常有表示比较范围的介词短语。例如：Zhang Hua is the tallest of the three.He works (the) hardest in his class.2. 最高级可被序数词以及 much，by far，nearly，almost，by no means，not quite，not really，nothing like 等词语所修饰。例如：This hat is by farmuchnearlyalmostnot nearlyby no meansnot quitenothing like the biggest. How much did the second most expensive hat coat?3. 表示“最高程度”的形容词，如 excellent，extreme，perfect等，没有最高级，也不能用比较级。4. 形容词最高级修饰作表语或介词宾语的名词、代词时，被修饰的词往往省略。e.g. He is the tallest (boy) in his class.5. 作状语的副词最高级前可以不加定冠词。e.g. Of all the boys he came (the) earliest.Step 4. PracticeDo more exercises to c