初中英语八年级下册期末复习考点闯关讲义

初中英语八年级下册期末复习考点闯关 一、核心知识点系统精讲（25个） 1. 现在完成时三大核心用法 知识点： ① 经历：Have you ever... + ever/never/before（Unit 8/9） ② 持续：have/has + 延续性动词 + for/since（Unit 10） ③ 结果：have/has + 非延续性动词 + just/already（Unit 9） 例题： —_____ you _____ (read) Treasure Island yet —Yes, I _____ (finish) it yesterday. A. Have; read; have finished B. Did; read; finished C. Have; read; finished 解析：选C。疑问句用现在完成时（yet），答句有yesterday用一般过去时。 2. 延续性动词与非延续性动词转换 知识点： 非延续性动词延续性转换例句（现在完成时） buy have/has had I've had this bag for 2 years. borrow have/has kept She has kept the book since Monday. 例题： 改错：He has borrowed the bike for three days. 解析：borrowed → kept。borrow为非延续性动词，需转换。 3. 形容词/副词比较级与最高级 知识点： 规则：tall → taller → the tallest; careful → more careful → the most careful 不规则：good → better → best; bad → worse → worst 例题： The Yangtze River is _____ (long) than the Yellow River, but the Nile is _____ (long) in the world. 答案：longer; the longest 4. 大数字与单位表达（Unit 7） 知识点： 千位分隔：5,430 → five thousand four hundred and thirty 单位复数：2,000 meters（非two thousands） 例题： 长城全长约_____千米。 A. twenty-one thousands and sixty B. twenty-one thousand and sixty C. twenty-one thousand sixty 解析：选B。千位与十位间加and。 5. 条件句（if引导的真实条件句） 知识点： 主句用一般将来时，从句用一般现在时： If it rains tomorrow, we will stay at home. 例题： If he _____ (come) early, we _____ (start) the meeting. 答案：comes; will start 6. 现在完成时与一般过去时对比（时间状语差异） 规则总结： 现在完成时一般过去时 强调动作与现在的关联 强调动作发生的具体时间 时间状语：already, yet, ever, never, just, for, since 时间状语：yesterday, last week, in 2020, ago 例句：I have read this book three times. 例句：I read this book last month. 例题： Q: She _____ (finish) her homework _____. A. has finished; just B. finished; just now C. has finished; yesterday 解析：选A。just（刚刚）与现在完成时连用；B中just now（刚才）需用一般过去时；C中yesterday不可与现在完成时连用。 7. How long 对持续时间的提问（Unit 10） 规则总结： 结构：How long + have/has + 主语 + 延续性动词过去分词 回答：For + 时间段 / Since + 时间点 注意：非延续性动词需转换（buy → have had, borrow → have kept）。 例题： Q: —_____ have you learned English —_____ I was six years old. A. How long; Since B. How often; For C. How soon; Since 解析：选A。How long询问持续时间，回答用since + 时间点。 8. 感官动词用法（look/sound/smell + adj.） 规则总结： 感官动词 + 形容词（描述状态）：look happy, sound interesting, smell delicious 不可用副词修饰感官动词： The flower smells sweetly. → The flower smells sweet. 例题： Q: The music _____ (beautiful). I want to listen to it again. A. sounds beautifully B. sounds beautiful C. is sounded beautiful 解析：选B。sound为感官动词，后接形容词beautiful。 9. 被动语态（一般现在时结构） 规则总结： 结构：am/is/are + 过去分词 动作 ... ...