Unit7单词讲解 课件 2023-2024学年人教版英语八年级下册

Unit7 What's the highest mountain in the world? 形容词和副词的比较级和最高级 形容词用法： A 作定语 She is a beautiful girl. B 作表语 The room is big. C 作补足语 We must keep the room clean. D 修饰不定代词放其后 I have something important to tell you. 副词用法 A 作状语修饰动词 We must study hard. B 修饰形容词 He is really busy. C 修饰其他副词 He works very hard. D 修饰整个句子 Luckily, I got 100 points this term. 形容词和副词的级别 三级 原级 比较级 最高级 形容词 tall taller the tallest 副词 hard harder the hardest 1．规则变化 1)一般在词尾加­er和­est tall—_______—________ long—_______—________ 2)以不发音字母e结尾的加­r和­st fine—_______—________ late—_______—________ taller tallest longer longest finer later finest latest 形容词和副词的级别 三级 原级 比较级 最高级 Let students study the rules first, and do some exercise. 5 3)以重读闭音节结尾且末尾只有一个辅音字母时，须双写这个辅音字母，再加­er和­est big—_______—________ thin—_______—________ 4) 以“辅音字母 + y”结尾的双音节词，先把“y”改为“i”再加-er, -est easy—______—______ friendly—________—__________ 5) 多音节和部分双音节，在原级前加more, most interesting—_________________—__________________ easier biggest thinner thinnest bigger easiest friendlier friendliest more interesting most interesting 6 2. 不规则变化 好坏 多少 远老 good/well better best many/much more most little less least bad/badly/ill worse worst far farther further farthest furthest old older oldest elder eldest 7 比较级句型： 1)“比较级＋than”表示“___________” 带 than China is larger than Italy. 2)“less＋原级＋than”表示“________” 降级比较 The book is less interesting than that one. 比…更… 不如… 3)“倍数＋比较级＋than”表示“…是…的几倍…” This box is three times bigger than that one. 8 4)“倍数＋as 原级 as…”表示“和…的几倍一样…” This box is twice as big as that one. 这个箱子是那个的两倍大。 5)“倍数+the 量词+of … The building is three times the height of that one. 6)比较级＋and＋比较级”表示“__________” stronger and stronger more and more interesting 7)“the＋比较级…，the＋比较级…”表示“越…就越… ” The more, the better. 多多益善。 越来越…　 9 8)“比较级＋than any other＋单数 (包括主语) China is larger than any other country in As