Unit2重点知识讲解 2025-2026学年人教版八年级英语上册

该初中英语知识清单系统梳理了人教八上Unit2核心知识体系。从8个核心单词（含用法、联想拓展及易混辨析）出发，延伸出5个重点短语，进而讲解动词不定式作目的状语和后置定语的核心句式，最终聚焦情态动词could与can的用法，构建从词汇到语法应用的学习支架。 知识链路按词汇用法、短语搭配、句式功能到语法规则的逻辑递进，每个知识点配具体例句和易混对比。通过语境化示例和辨析训练，提升学生语言理解与表达能力，培养思维品质，助力形成系统的英语学习方法。

人教英语八上Unit2重点知识讲解 一、核心单词 1. invite /ɪnˈvaɪt/ v. 邀请 用法： invite sb to sth 邀请某人参加某事 invite sb for sth 为某事邀请某人 invite sb to do sth 邀请某人做某事 联想拓展：名词形式为invitation（邀请；请柬）。 例句： I want to invite my friends to my birthday party. They invited me to go hiking with them. 2. add /æd/ v. 添加；加 用法： add...to... 把……加到……里 add to 增加；增添 add up to 总数是；结果是 例句： Please add some sugar to the coffee. The bad weather added to our difficulties. 3. plan /plæn/ v. 策划；打算 n. 计划；方案 用法： plan to do sth 计划做某事 make a plan (to do sth) 制订计划（做某事） 例句： We plan to visit the museum this weekend. He made a plan to improve his English. 4. lift /lɪft/ n. 搭便车；电梯 v. 举起；抬起 用法： 作名词：give sb a lift 开车顺便送某人 作动词：表示“举起；抬高” 例句： Can you give me a lift to the station? He lifted the heavy box onto the table. 5. borrow /ˈbɒrəʊ/ v. 借 用法：非延续性动词，强调“从别人那里借来”，常用搭配 borrow sth from sb/somewhere。 易混辨析： 易混词 用法及例句 borrow 借入：I borrowed a book from the library. lend 借出：She lent her bike to me. keep 保留（延续性动词）：You can keep the book for two weeks. 例句： Can I borrow your dictionary? He borrowed some money from his friend. 6. until /ənˈtɪl/ prep. & conj. 到……时；直到……为止 用法： 作介词，后接名词/代词；作连词，后接时间状语从句。 用于否定句时，常与非延续性动词连用，意为“直到……才……”。 例句： We waited until he came back. He didn’t go to bed until he finished his homework. 7. familiar /fəˈmɪliə(r)/ adj. 熟悉的 用法： be familiar with sb/sth 对某人/某物熟悉 be familiar to sb 为某人所熟悉 例句： I am familiar with this song. The book is familiar to many students. 8. cover /ˈkʌvə(r)/ v. 遮盖；包括 n. 遮盖物；封面 用法： cover A with B 用B盖住A be covered by/with... 被……覆盖 作动词还可表示“包括；涉及”；作名词意为“封面”。 例句： She covered her face with her hands. The ground is covered with snow. 二、重点短语 1. give sb a lift 开车顺便送某人 例句：My father gave me a lift to school this morning. 2. add...to... 把……加入…… 例句：Please add some milk to the tea. 3. plan to do sth 计划做某事 例句：They plan to have a picnic this Sunday. 4. be familiar with 对……熟悉 例句：He is familiar with the city. 5. be covered with 被……覆盖 例句：The mountains are covered with trees. 三、核心句式 1. 动词不定式作目的状语 句式结构：动词不定式可放在句首或句末，表“为了……”；句首时常用逗号与主句隔开。 例句： To catch the early bus, we got up early. We got up early to catch the early bus. 2. 动词不定式作后置定语 句式结构：修饰前面的名词或代词，表“要做的……”。 例句： I have a lot of homework to do. He is looking for a room to live in. 四、语法精讲：情态动词could与can的用法 1. 情态动词could的用法 委婉请求他人： 句型 Could you (please) do...?，肯定回答可用 Certainly./Of course./Sure.，否定回答可用 Sorry, I can’t. 例句：—Could you please sweep the floor? —Yes, I can. 委婉请求允许自己做某事： 句型 Could I do...?，回答时用 can 而不是 could。 例句：—Could I use your phone? —Yes, you can. 2. 情态动词can的用法 表示请求： 句型 Can you...? / Can I...?，用于礼貌地提出请求或询问许可。 例句：—Can you pass me the salt? —Of course. 表示能力： 表“能；会”，描述具备的能力。 例句：He can speak English fluently. ( 1 ) 学科网（北京）股份有限公司 $