Unit4 Topic2 Section A-2023-2024学年八年级英语上册【趣味课堂】精品课件（仁爱科普版）

Unit 4 Our World Section A Topic 2 How can we protect ourselves from the earthquake? 1 I、New words and expressions：earthquake, province, missing，strike. fall down, another two, lose one’s life... Learning aims: II、Study the rules of comparative and superlative degrees of Adjectives. III、Learn some sentence structures about what happened in an earthquake.。 单音节及部分双音节形容词比较级(-er)和最高级(-est)的规则变化。 Review 1.一般情况下在词尾直接加er或est eg. tall—taller—tallest 2.以字母e结尾的单词先去e再加er或est eg. wide—wider—widest 3.以重读闭音节结尾，且末尾只有一个辅音字母的单词，先双写该辅音字母，再加er或est eg. big—bigger—biggest 4.以辅音字母+y结尾的单词,先改y为i,再加er或est eg. busy—busier—busiest 3 部分双音节词和多音节词在前面加more或most构成比较级和最高级。 eg. beautiful—more beautiful—most beautiful serious—more serious—most serious interesting—more interesting—most interesting ✮不规则变化： good/well—better—best bad/ill—worse—worst many/much—more—most little—less—least farther—farthest 一般表示有形距离。 far further—furthest 侧重于抽象的距离概念，如“留学深造”； 感情、思想等的深远。 4 Study the rules and complete the table. Adjective useful serious dangerous beautiful important terrible Comparative more useful more serious more dangerous more beautiful more important more terrible Superlative most useful most serious most dangerous most beautiful most important most terrible 2a The telephone is useful. telephone The mobile phone is __________ than the telephone. mobile phone The computer is _______________ of the three. computer Let's talk 2b useful For example: more useful the most useful mobile /ˈməubaɪl/ adj. 可移动的 phone /fəun/ n. 电话，电话机 serious fire earthquake rainstorm Ask and answer with your partner according to 2b. A: The __________