【弯道超车】Unit 1 Great explorations 核心语法之定语从句-2026年春沪教牛津版(深圳.广州)九年级英语下册精讲精练 (含答案解析)

/ 让学习更有效 新课备课备考 | 英语学科 2026年春沪教牛津版(深圳 广州)九年级英语下册核心语法精讲精练 Unit 1 Great explorations 核心语法：定语从句 一、核心概念 1. 什么是定语从句？ 定语：修饰名词或代词的成分 定语从句：用一个完整的句子来修饰名词或代词，相当于一个“大形容词” 被修饰的词：先行词 引导词：关系词（在从句中代替先行词，并连接主从句） 2. 定语从句在句中的位置： 二、关系代词详解 1. 关系代词分类表： 关系代词 指代对象 在从句中的作用 是否可省略 例句 who 人 主语、宾语 作宾语时可省 The girl who is singing is from Class 1. whom 人 宾语 可省略 The man (whom) we met is our new teacher. which 物、动物 主语、宾语 作宾语时可省 The book which is on the desk is mine. that 人、物 主语、宾语 作宾语时可省 This is the best film that I have ever seen. whose 人、物 定语（表所属） 不可省略 The boy whose father is a doctor studies hard. 2. 特殊用法强调： which的指代范围：强调which可指代整句话 He passed the exam, which made his parents very happy. that的灵活性：重点讲解that的通用性 三、关系副词 关系副词 先行词类型 在从句中的作用 例句 when 时间名词 时间状语 I'll never forget the day when we first met. where 地点名词 地点状语 This is the house where I was born. why reason 原因状语 That's the reason why I was late. 注意：系副词可用“介词+which”替换： when = in/on/at + which where = in/at + which why = for which 四、定语从句的类型 1. 限制性定语从句 特点：对先行词起限定作用，不可省略，否则句意不完整 无逗号与主句隔开 例：Students who study hard will succeed.（努力学习的学生会成功） 2. 非限制性定语从句 特点：对先行词起补充说明作用，可省略，不影响句意完整 有逗号与主句隔开 不能用that引导 例：My father, who is a doctor, works in a hospital. 五、重点规则 1. 只用that的情况 先行词为不定代词（all, everything, nothing, something等） All that glitters is not gold. 先行词被序数词或最高级修饰 This is the first book that I read in English. It's the most interesting story that I've ever heard. 先行词同时包含人和物 They talked about the people and things that they remembered. 先行词被the only, the very, the same修饰 This is the very book that I'm looking for. 2. 不用that的情况： 非限制性定语从句中 Shanghai, which is my hometown, has changed a lot. 介词后（用whom, which） This is the room in which we held the meeting. 3. 特殊结构： the same...as...（与...相同） This is the same book as I lost yesterday. such...as...（像...这样的） Such books as you bought are useful. 六、关系词选择三步法 解题步骤： 找先行词：确定被修饰的词 看指代：指人→who/whom/that；指物→which/that 判成分：关系词在从句中作什么成分 作主语：who/which/that 作宾语：whom/which/that（可省略） 作定语：whose 作状语：when/where/why 七、定语从句简化形式 1、关系代词作宾语时可省略 The book (that) you lent me is very helpful. 2、定语从句简化为分词短语 The girl who is sitting by the window is my sister. → The girl sitting by the window is my sister. A house that was built 100 years ago was destroyed. → A house built 100 years ago was destroyed. 3、定语从句简化为不定式 I have a lot of work that I must do. → I have a lot of work ... ...