Unit3重点知识讲解 2025-2026学年人教版八年级英语上册

人教英语八上Unit3重点知识讲解 一、核心单词 1. compare /kəmˈpeə(r)/ v. 比较；对比 用法： compare...with... 将……与……相比（同类之间比较） compare...to... 把……比作……（异类之间比较/比喻） compared with 和……相比较（作状语） 例句： Don’t compare yourself with others. Teachers are often compared to candles. Compared with last year, this year’s harvest is better. 2. solve /sɒlv/ v. 解决；解答 用法：及物动词，常与problem搭配，表示“解决问题”。 易混辨析： 易混词 用法及例句 solve 解决问题：He solved the math problem. answer 回答问题：Please answer my question. 例句： We need to solve this problem as soon as possible. She solved the puzzle in five minutes. 3. attend /əˈtend/ v. 参加；出席 用法：正式用语，常表示参加会议、婚礼、典礼或听报告、讲座等。 易混辨析： 易混词 用法及例句 attend 出席会议：He attended the important meeting. join 加入组织：She joined the music club. join in 参加活动：Let’s join in the game. take part in 参加群众性活动：He took part in the sports meeting. 例句： I will attend the wedding tomorrow. She attended a lecture on environmental protection. 4. pleasure /ˈpleʒə(r)/ n. 乐事；愉快；荣幸 用法： 表“愉悦；快乐”时为不可数名词；表“乐事；愉快的经历”时为可数名词。 短语：It’s my pleasure.（不用谢）；With pleasure.（乐意效劳） 易混辨析： 易混词 用法及例句 pleasure 名词：It’s my pleasure to help you. pleasant 形容词（修饰事物）：We had a pleasant trip. pleased 形容词（修饰人）：She is pleased with her result. 例句： It gives me great pleasure to meet you. —Thank you for your help. —It’s my pleasure. 5. difference /ˈdɪfrəns/ n. 差异 用法： make a difference (to...) 对……有影响 make no difference (to...) 对……没有影响 例句： Your help made a big difference to my life. It makes no difference whether he comes or not. 6. thanks to 归功于；由于；因为 用法：后接名词、代词或动名词，相当于because of，表原因。 易混辨析： 易混词组 用法及例句 thanks to 表原因：Thanks to your help, I passed the exam. thanks for 表感谢：Thanks for your advice. 例句： Thanks to the rain, the crops grew well. Thanks to his hard work, he got promoted. 7. reach /riːtʃ/ v. 伸手；到达 用法： 作“到达”讲时，是及物动词，直接接地点名词；也可作不及物动词。 作“伸手”讲时，短语 reach for 表示“伸手去拿”。 例句： We reached the station at 9 o’clock. He reached for the book on the shelf. 二、重点短语 1. compare...with... 将……与……相比 例句：She often compares her grades with her classmates’. 2. make a difference 有影响；起作用 例句：Small actions can make a difference to the environment. 3. thanks to 多亏了；由于 例句：Thanks to the doctor, he is out of danger now. 4. have sth in common 有共同之处 例句：They have a lot in common and get along well. 5. by accident 偶然；意外地 例句：I met my old friend by accident on the street. 三、核心句式 1. “as...as...” 结构 句式结构：意为“像……一样……”，表示同级比较，两个as中间用形容词或副词原级；否定形式为“not so/as...as...”，意为“不如……”。 例句： He runs as fast as his brother. This book is not as interesting as that one. She works three times as hard as me. 2. so 表示结果 句式结构：so 作连词，连接两个并列分句，意为“因此；所以”，表示结果。 例句： He is ill, so he can’t go to school. It was raining heavily, so we stayed at home. 四、语法精讲：形容词和副词的比较级 1. 构成规则 ① 规则变化 单词类型 条件 构成方法 例词 单音节词和部分双音节词 一般情况 词尾加-er long → longer 以不发音e结尾 词尾加-r nice → nicer 重读闭音节且末尾只有一个辅音字母 双写辅音字母加-er big → bigger 以“辅音字母+y”结尾 变y为i，加-er busy → busier 部分双音节词和多音节词 无 词前加more quickly → more quickly ② 不规则变化 原级 比较级 good/well better bad/badly/ill worse many/much more little less far farther/further 2. 用法句型 A + be动词 + 形容词比较级 + than + B： My bike is newer than Tom’s. A + 实义动词 + 副词比较级 + than + B： He runs faster than Tom. 比较级 + and + 比较级（越来越……）： It’s getting colder and colder. The + 比较级..., the + 比较级...（越……，越……）： The more you practice, the better you will be. ( 1 ) 学科网（北京）股份有限公司 $