(
课件网) Unit 4 Inventions Period 3 Grammar 牛津深圳·广州版八年级上册 Learning objectives 1.Knowledge objectives: ①Learn the comparative and superlative forms, usages of some irregular adjectives "bad/bad", "good/good", "more/more", "less" and "far". ②Learn and summarize the structure and usage of as. ③Guide students to actively explore and learn, and understand the cultural content related to this lesson. 2.Skill objectives: ①Be able to analyze and judge the chart information of the textbook, and skillfully use the comparative and superlative adjectives to compare things. Learning objectives ②Cultivate students' ability to summarize grammar rules. 3.Emotional objectives: Cooperate with classmates to discuss topics and cultivate students' sense of cooperation. 4.Thinking capacity ： Cultivate students' level of inquiry learning, autonomous learning, analysis and induction, and cooperative learning. Revision 根据句意及中文提示完成单词 1. The desk is _____(布满灰尘的). He hasn't cleaned it for a few days. 2. The invention is really _____(有用的)in our daily life. 3. We saw two _____ (四轮马车) in the City Museum. 4. Can you _____(介绍)me to the manager in your company 5. India is a _____(发展中的)country. dusty practical carriages introduce developing Discussion 1.Which invention do you think is the greatest invention Why (表示比较三个中最伟大的最伟大的一个发明 ) 2.They help people live a better life. (表示过上比之前更好的生活) 3.The wheel is perhaps the greatest invention in history. (表示历史上最伟大的发明) 4.After its invention, travelling became faster and more comfortable.(表示比之前更快更舒适) Look and say! Look at the red words in the following sentences. What do they mean What are the common characteristics 红色字的单词是形容词。当我们需要对事物作出比较时，需要用到比较级和最高级。 Lead in Do you know the comparative forms of adjectives Grammar 当我们需要对事物作出比较时，需要用到比较级。 比较级的句子结构通常是: 什么+动词be (am, is, are)+形容词比较级+ than (比) +什么,如: I'm taller and heavier than you. (我比你更高和更重。) An elephant is bigger than a tiger. (一只大象比一只老虎更大。) 一.比较级的句子结构 注意:比较的两者应该是互相对应的可比较的东西。 典型错误: My hair is longer than you. (我的头发比你更长。) 比较的两者是我的头发、你(整个人)，那么比较的对象就没有可比性。 应该改为: My hair is longer than yours.或My hair is longer than your hair. 变化规则 原级 比较级 最高级 单音节词在词尾加-er (比较级)或-est(最高级)。 bright (明亮的) broad (广 阔的) cheap (便宜的) 以重读闭音节结尾的词末尾只有一个辅音字母应双写辅音字母再加-er或-est。 big (大的) fat (胖的) hot (热的) 二.形容词比较级和最高级的变化规则 Let’s learn brighter brightest broader broadest cheaper cheapest bigger biggest fatter fattest hotter hottest 变化规则 原级 比较级 最高级 以字母e接尾的词加-r或-st。 able (能干的) brave (勇敢的) close (接近的) 以辅音字母+y结尾的词变y为i再加-er,或-est。 busy (忙碌的) dirty (脏的) dry (干燥 ... ...
