Unit1 语法专项～Word Power课件 2025-2026学年译林版英语八年级上册

教学课件 译林英语八年级上册 Unit1 语法专项 +Word Power 全解精讲+分层练习 1 学习目标 1.掌握形容词原级、比较级、最高级的用法与核心句型 2.熟记形容词比较级/最高级的规则、不规则变化 3.理解-ful/-less构词法，掌握高频派生词及搭配 4.能在语境中正确运用形容词及构词法单词 形容词的三种基本形式 形容词有三种形式，适配不同比较语境 原级：描述人/事物本身固有特征，无任何比较 比较级：仅限两者间的程度比较，表“更……” 最高级：三者及以上间的程度比较，表“最……” 形式选择的核心依据：比较对象的数量 形容词三形式核心结构表 类型 核心用法 句型结构 原级 无比较，描述自身特征 主语 + be动词 + 形容词原级 比较级 两者比较，表“更……” 主语 + be/实义动词 + 比较级 + than + 比较对象 最高级 三者及以上比较，表“最……” 主语 + be动词 + the + 最高级 + 范围状语（in/of） 注：实义动词后直接用比较级，无需加be动词 比较级/最高级 规则变化（单/部分双音节①） 单音节/部分双音节形容词，按词尾特征加后缀变化 1.一般情况：直接加 -er（比较级）/-est（最高级） 例：tall→taller→tallest；clean→cleaner→cleanest 2.不发音e结尾：直接加 -r（比较级）/-st（最高级） 例：nice→nicer→nicest；wide→wider→widest 核心：避免重复加e，简化后缀书写 比较级/最高级 规则变化（单/部分双音节②） 1.辅音字母+y结尾：先变y为i，再加 -er/-est 例：happy→happier→happiest；busy→busier→busiest 2.元音字母+y结尾：直接加 -er/-est 例：gray→grayer→grayest；play→playful（拓展） 核心：区分词尾y前的字母属性（元音/辅音） 比较级/最高级 规则变化（重读闭音节） 重读闭音节判定：同时满足「辅+元+辅」词尾 + 重读在最后一个音节 变化规则：双写末尾辅音字母，再加 -er/-est 例：big→bigger→biggest；thin→thinner→thinnest 例：hot→hotter→hottest；fat→fatter→fattest 核心：两个判定条件缺一不可，无重读则不双写 比较级/最高级 规则变化（多/部分双音节） 判定标准：3个及以上音节的形容词；部分双音节形容词 变化规则：原级前加more（比较级）/most（最高级），不加后缀 例：interesting→more interesting→most interesting 例：beautiful→more beautiful→most beautiful 例：outgoing→more outgoing；important→most important 核心：多音节形容词无后缀变化，仅靠前缀改变等级 比较级/最高级 不规则变化（必背） 原级 比较级 最高级 用法说明 good/well better best good修饰名词；well修饰动词 bad/ill worse worst 均可表“坏的/糟糕的”，通用无差异 many/much more most many接可数名词；much接不可数名词 little less least 仅修饰不可数名词，表“数量少的” far farther/further farthest/furthest farther表距离远；further表程度深 原级核心句型——同级比较 专用于两者间的程度相同/不同比较，中间只能用原级 1.肯定结构：A + be + as + 形容词原级 + as + B 表“A和B一样……”，例：Lucy is as slim as Lily. 2.否定结构：A + be + not as/so + 形容词原级 + as + B 表“A不如B……”，as/so可互换， 例：This book is not as interesting as that one. 核心：as...as中间必须用形容词原级，不可用比较级/最高级 比较级核心句型 结构：比较级 + than + 比较对象 例：Tom is taller than his brother；He runs faster than me. 重叠比较句型 结构：比较级 + and + 比较级，表“越来越……” 1.单音节形容词：直接用，例：It’s getting colder and colder in winter. 2.多音节形容词：more and more + 原级，例：She is becoming more and more beautiful. 核心：多音节形容词无直接重叠形式，需加more衔接 比较级核心句型（双重+最高级转换） 双重比较级句型 结构：The + 比较级，the + 比较级，表“越……，就越……” 例：The more careful you are, the fewer mistakes you make. 核心：前后均用比较级，前半句为条件，后半句为结果 最高级转换句型 结构：比较级 + than + any other + 单数名词，表最高级含义 例：He is taller than any other student in his class. 核心：限定同一范围内的比较，any other后必须接单数名词 最高级核心句型——基础结构+范围区分 基础结构 the + 形容词最高级 + 范围状语（in/of短语） 例：She is the most outgoing girl in our class. 核心：最高级前的the不可省略，范围状语是判定最高级的关键 范围区分 1.in后接：班级、学校、城市等地点/集体名词 2.of后接：数量、同类人/事物，例：of the three boys；of all the teachers 最高级 拓展核心句型 one of the + 形容词最高级 + 可数名词复数，表“……中最……之一” 例：This is one of the most beautiful cities in China. 关键注意点 1.最高级前的the不可省略 2.名词必须用复数形式，适配one of的“众多之一”含义 拓展用法 序数词（first/second/third）+ the + 最高级，例：He is the second tallest boy in our grade. Word Power 核心——后缀-ful/-less构词法 均为形容词后缀，仅能加在名词后构成形容词，不可加在动词后 -ful：表“充满……的、具有……性质的、有……的”，多为褒义/中性 -less：表“没有……的、无……的、不……的”，多为-ful的反义词，贬义/否定 核心：两者为对应反义后缀，构词基础均为名词 -ful/-less 高频派生词（核心必背） 基础名词 -ful形式（含义） -less形式（含义） 核心固定搭配 care careful（细心的） careless（粗心的） be careful with sth；be careless about sth help helpful（乐于助人的） helpless（无助的） be helpful to sb；feel helpless hope hopeful（充满希望的） hopeless（无望的） feel hopeful；a hopeless task use useful（有用的） useless（无用的） be useful for sth；a useless tool -ful 拓展派生词 仅加-ful构成形容词，无对应-less形式，教材要求认知掌握 cheer → cheerful（快乐的、开朗的）：a cheerful boy colour → colourful（色彩鲜艳的、丰富多彩的）：colourful clothes wonder → wonderful（极好的、绝妙的）：a wonderful trip thought → thoughtful（体贴的、考虑周到的）：a thoughtful friend -ful/-less派生词 等级变化规则 此类派生词多为多音节形容词，其比较级/最高级变化 遵循多音节形容词规则：原级前加more/most，不加后缀 例：careful→more careful→most careful 例：helpful→more helpful→most helpful 例：hopeful→more hopeful→most hopeful 核心：无-er/-est变化形式，统一用前缀改变等级 语法小练—— 用所给词的适当形式填空 1.This story is ________________ (interesting) than that one. 2.She is the ________________ (slim) girl in our whole school. 3.He has ________________ (little) water than his deskmate. 4.This is the ________________ (good) book I have ever read. 5.It’s getting ____________ and ____________ (hot) in summer. 6.The ____________ (much) you read, the more you learn. more interesting slimmest less best hotter hotter more 词汇小练——-ful/-less形式填空 1.Be ________ (care) when you cross the busy street. 2.This new pen is very ________ (use) for my study. 3.He felt __________ (hope) after winning the competition. 4.Don’t be __________ (care) with your homework. 5.The little girl felt ___________ (help) when she got lost. 6.We had a ___________ (wonder) time at the weekend party. careful useful hopeful careless helpless wonderful 句型转换小练 按要求改写句子，每空一词 1.Lucy is 13 years old. Lily is 13 years old.（合并） Lucy is ________ ________ ________ Lily. 2.This box is heavier than that one.（同义句） That box is ________ ________ this one. 3.She is the cleverest student in her class.（比较级） She is cleverer than ________ ________ student in her class. 4.Tom swims faster than Jim.（同义句） Jim swims ________ ________ Tom. 5.The room is not as clean as the hall.（比较级） The hall is ________ ________ the room. 6.This is a very beautiful flower.（感叹句） ________ ________ beautiful flower it is! as old as lighter than any other slower than cleaner than What a 单项选择小练 从A、B、C、D中选出最佳答案 1.—Which is ________, a bike, a car or a plane? —A plane. A. fast B. faster C. the fastest D. more fast 2.The ________ you practice, the ________ you will do it. A. harder; better B. hard; good C. hardest; best D. harder; good 3.This movie is ________ than the one we watched last week. A. interesting B. more interesting C. most interesting D. the most interesting 4.He is one of the ________ teachers in our school. A. more popular B. most popular C. popular D. popularest 5.The park is not ________ as the zoo. A. so beautiful B. more beautiful C. most beautiful D. the most beautiful 6.Be ________ with the glass, or it will break easily. A. care B. careful C. careless D. carefully C A B B A B 短文填空小练 用括号内所给词的正确形式填空 My best friend Lisa is ________ (tall) than me, but I am ________ (slim) than her. She is very ________ (help) and always helps me with my English. She is a ________ (care) girl, so she never makes mistakes in her homework. She is one of the ______________ (cheer) girls in our class. We often go to the ________ (colour) park near our home. We always have a ________ (wonder) time there. I think she is the ________ (good) friend in the world. taller slimmer helpful careful most cheerful colourful wonderful best 短文填空小练 用括号内所给词的正确形式填空 My new deskmate is ___________ (outgoing) than any other student in our class. He is ________ (thought) and always helps me when I am in trouble. Last week, I failed my math test and felt very ________ (hope). He told me not to be ________ (care) with my study. He said, “The ________ (hard) you work, the ________ (good) grades you will get.” He gave me a lot of ________ (use) advice. Now I am ________ (good) at math than before. I think he is one of the ________ (nice) classmates I have ever met. thoughtful hopeless careless harder better useful better nicest more outgoing 单元重点 易混点辨析 1.farther（距离远）VS further（程度深），不可混用 2.many（接可数名词）VS much（接不可数名词），比较级均为more 3.-ful/-less仅加在名词后，不可加在动词、形容词后 4.最高级前的the：one of/序数词后不可省略，口语中可省略 5.as...as中间必须用原级，否定式not as/so...as可互换 单元核心 知识梳理 1.形容词三形式：原级（无比较）、比较级（两者）、最高级（三者及以上） 2.变化规则：单音节加后缀/多音节加more/most；不规则变化单独记 3.核心句型：同级比较、比较级重叠/双重、最高级转换/one of结构 4.构词法：-ful（有……的）/-less（无……的），加名词变形容词 5.派生词变化：多音节，加more/most变比较级/最高级 教学课件 Unit1 语法专项 +Word Power Thank you for listening! 27 $