Unit8重点知识讲解 2025-2026学年人教版八年级英语上册

该初中英语单元知识清单系统梳理了人教英语八上Unit8重点内容，涵盖核心单词、重点短语、核心句式及语法精讲四大知识范畴，为学生搭建了从“词汇用法掌握”到“句式结构运用”再到“语法规则理解”的递进式学习支架。 清单采用“用法+例句”分类呈现和“易混词对比”关联设计，如将“cost”与“take”“spend”通过表格对比用法，培养学生的语言能力和思维品质。特别标注“prefer”的三种固定搭配及“if条件句时态规则”，并附典型例句辅助理解，不同层次学生可高效掌握要点，教师可据此优化教学环节，提升课堂针对性。

人教英语八上Unit8重点知识讲解 一、核心单词 1. prefer /prɪˈfɜː(r)/ v. 较喜欢 用法： prefer sth to sth 比起某物/事更喜欢某物/事 prefer doing sth to doing sth 比起做某事更喜欢做某事 prefer to do sth rather than do sth 宁可做某事而不愿做某事 例句： I prefer tea to coffee. She prefers reading to watching TV. 2. worry about 为……担心 用法： 动词短语，后接名词、代词或动名词；形容词形式为 worried，短语 be worried about 与其同义。 例句： Don’t worry about me. I can take care of myself. She is worried about her exam result. 3. difficulty /ˈdɪfɪkəlti/ n. 困难；难题 用法： 表抽象困难时为不可数名词，常用短语 have difficulty (in) doing sth（做某事有困难）。 表具体难事时为可数名词。 例句： He had difficulty in finding a job. We faced many difficulties during the project. 4. continue /kənˈtɪnjuː/ v. 持续；继续做 用法： continue doing sth / continue to do sth 继续做某事 例句： It continued raining all day. She continued to work after a short break. 5. offer /ˈɒfə(r)/ v. 提供；主动提出 n. 主动提议；出价 用法： offer sth to sb / offer sb sth 给某人提供某物 offer to do sth 主动提出做某事 例句： He offered his seat to the old man. She offered to help me with my homework. 6. trust /trʌst/ n. & v. 信任；相信 用法： trust sb/sth 相信某人/某事 trust sb (not) to do sth 相信某人（不）会做某事 例句： You can trust him. He is very honest. I trust you to finish the task on time. 7. cost /kɒst/ n. 费用；价钱 v. 价格为；使损失 用法： 作动词时主语通常是事物，过去式和过去分词均为 cost。 作名词时表“代价；费用”。 易混辨析： 易混词 用法及例句 cost 主语是物：The book cost me 20 yuan. take 常用 it takes sb + 时间 + to do sth 结构 spend 主语是人：I spent 20 yuan on the book. 例句： The new phone cost me 5,000 yuan. The cost of the trip is very high. 二、重点短语 1. in person 亲自；亲身 例句：You should go to meet him in person. 2. pay attention to 注意；关注 例句：Please pay attention to your pronunciation. 3. find out 查明；弄清（情况） 例句：We need to find out the truth of the accident. 4. face to face 面对面 例句：It’s better to talk to him face to face. 5. make up (with sb) 与……言归于好 例句：They made up after the argument. 三、核心句式 1. “It’s time (for sb) to do sth” 句型 句式结构：意为“到（某人）做某事的时间了”；拓展结构 It’s time for sth（到（做）某事的时间了）。 例句： It’s time for us to have class. It’s time for dinner. 2. “It is + 形容词 + (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, important。 形容词表人的性格品质时用 of，如 nice, kind, clever。 例句： It is important for us to learn English. It is kind of you to help me. 四、语法精讲：if 引导的条件状语从句 1. 基本概念 条件状语从句表示主句动作发生的前提、条件、假想和推测，由 if 引导，意为“如果”。 2. 时态规则（主将从现） 当主句用一般将来时、含有情态动词或为祈使句时，条件状语从句用一般现在时表将来。 主句为一般将来时： If it rains tomorrow, we won’t go to the park. 主句含情态动词： If you want to lose weight, you must eat less meat. 主句为祈使句： If you are not strong enough, please don’t take part in such an activity. 3. 句型转换 祈使句 + and/or + 陈述句： Study hard, and you will pass the exam. 借助 without/with 转换： If there is no water, fish will die. = Fish will die without water. ( 1 ) 学科网（北京）股份有限公司 $