Unit3重点知识讲解 2025-2026学年译林版八年级英语上册

译林英语八上Unit3重点知识讲解 一、核心单词 1. feed /fiːd/ v. 为……提供食物；喂养 用法：过去式为 fed。 feed on 以……为食 feed sth to sb/sth / feed sb/sth on/with sth 给某人/某物喂某物 例句： Horses feed on grass. Please feed the cat some fish. 2. against /əˈɡenst/ prep. 逆；反对 用法：介词，不能作动词，常见含义： 表“反对”：be against sth 表“碰撞”：crash against 表“靠着”：lean against 表“逆着”：row against the current 例句： They are strongly against the plan. He leaned against the wall to rest. 3. successful /səkˈsesfl/ adj. 有效的；成功的 用法：可作定语或表语；名词形式为 success（成功），动词形式为 succeed（成功）。 常见搭配： succeed in doing sth 成功做某事 例句： He is a successful businessman. She succeeded in passing the exam. 4. invent /ɪnˈvent/ v. 发明 易混辨析： 易混词 用法及例句 invent 发明原本没有的事物：Edison invented the light bulb. discover 发现原本存在的事物：Columbus discovered America. 例句： He invented a new type of machine. Who invented the telephone? 5. aloud /əˈlaʊd/ adv. 出声地；大声地 易混辨析： 易混词 用法及例句 aloud 强调“出声”，常与 read, say 连用：Please read the text aloud. loud 强调“大声”，可作形容词或副词：Speak loud, please. loudly 强调“喧闹地”，含“嘈杂”意味：The bell rang loudly. 例句： Reading English aloud every morning is helpful. Don’t talk so loud in the library. 二、重点短语 1. fall behind 落后 例句：If you don’t work hard, you will fall behind. 2. set...apart 使……突出；使……与众不同 例句：His creativity sets him apart from other students. 3. in order to 为了 例句：We got up early in order to catch the first bus. 4. as...as possible 尽可能…… 例句：Please finish the work as soon as possible. 5. rather than 而不是 例句：He chose to stay at home rather than go out. 三、核心句式 1. “It is + adj. + (for/of sb) + to do sth” 句型 句式结构：it 是形式主语，真正的主语是动词不定式。 形容词表事物特点时用 for（如 easy, hard）。 形容词表人的品质时用 of（如 kind, nice）。 例句： It is important for us to learn English well. It is kind of you to help me. 2. “find + 宾语 + 宾语补足语” 结构 句式结构：表示“发现……是……的”，宾语补足语可由形容词、名词、介词短语等充当。 例句： I found the movie interesting. She found herself in a strange place. 四、语法精讲 1. 副词的比较级与最高级 ① 构成规则 变化规则 例词 一般情况直接加-er/-est hard → harder → hardest 以不发音e结尾加-r/-st late → later → latest 以“辅音字母+y”结尾，变y为i加-er/-est early → earlier → earliest 多音节和部分双音节词前加more/most carefully → more carefully → most carefully 不规则变化 well → better → best; badly → worse → worst ② 用法要点 比较级：表示两者比较，常用 than 连接；可用 much, even 等修饰；特殊结构“比较级+and+比较级”表示“越来越……”，“the+比较级..., the+比较级...”表示“越……越……”。 最高级：表示三者或以上比较，常用 of/in/among 表示范围；副词最高级前的 the 可省略。 2. 反身代词 ① 构成 人称 单数 复数 第一人称 myself ourselves 第二人称 yourself yourselves 第三人称 himself/herself/itself themselves ② 用法 作及物动词/介词的宾语：He is teaching himself English. 作同位语：He himself made the cake. 作表语：The man in the photo is myself. 常见短语：teach oneself（自学）、by oneself（独自地）、enjoy oneself（玩得开心） ( 1 ) 学科网（北京）股份有限公司 $