Unit 1 Choice and Decision1-2025-2026学年高中英语选修三语法知识点全解(重大版)

2026-02-10
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高中选择性必修第三册重庆大学版 【寒假专版】 A版知识点全解 寒假专版 Unit 1 Choice and Decision 语法专项突破 考频分析 重庆大学版选择性必修第三册中,Unit1 Choice and Decision的语法是重点语法模块,考频占该单 元语法总量的15%左右,贯穿试卷核心题型:单项选择(1-2题)、完形填空(2-3题)、语法填空 (1-2题)、书面表达(核心考察,直接影响语境表达与逻辑连贯性)。在语境理解类题目中,该语法 的语用功能及语境辨析往往是解题关键。 考查内容 。非谓语动词(不定式/分词作状语区别):考频占语法总量的15%左右,贯穿试卷多个核心题型:单 项选择1-2题、完形填空2-3题、语法填空1-2题、书面表达核心考察,直接影响句子表达的逻辑 性与丰富性。 。情态动词:多种情态动词的用法、否定式与疑问式,以及表推测的用法。 知识点一:非谓语动词(不定式/分词作状语区别) 1.句法功能差异 1.不定式作状语: 。目的状语:To catch the early bus,.he got up at6am. 。结果状语(意外):He woke up to find everyone gone,. 。原因状语(表情感):I'm glad to see you. 2.分词作状语: 。现在分词表主动:Seeing the teacher,,the students stopped talking, ·过去分词表被动:Seen from the hill,the city looks beautiful. ·时间/原因/条件/让步状语:Having finished homework,he went out.(时间) 2.逻辑主语一致性 高中选择性必修第三册重庆大学版 【寒假专版】 A版知识点全解 1.不定式: ●主动关系:He came to help us.he主动帮助) 。被动关系:The book is easy to understand.(书被理解) 2.分词: 。现在分词表主动/进行:The girl singing is my sister, 。过去分词表被动/完成:The window broken yesterday is fixed.. 3.特殊结构与固定搭配 1.only to do:He hurried to the station only to find the train left. 2.垂悬分词错误:Walking in the park,the flowers are beautiful..(错误) 3.独立主格结构:Weather permitting,.we'll go hiking. 知识点二:常见情态动词的用法 1.can/could(能力、许可、可能性) 1.基本含义: 。ca:现在能力/许可/理论可能性 。could:过去能力/委婉请求/较小可能性 2.结构: 。肯定:主语+can/could+动词原形 ●否定:主语+can't/couldn't+动词原形 3.例句: She can speak three languages. Could you pass me the pen? It can't be true. 2.nay/might(许可、可能性) 1.基本含义: ·may:许可/可能性 ·might:较小可能性/过去许可 2.结构: 2 高中选择性必修第三册重庆大学版 【寒假专版】 A版知识点全解 。肯定/疑问:主语+may/might+动词原形 ●否定:主语+may not/might not+动词原形 3.例句: You may leave the classroom now. It might rain tomorrow. 3.must/have to(必须、义务) 1.基本含义: 。must:主观必须/肯定推测 ·have to:客观需要(有人称/时态变化) 2.结构: ·肯定:主语+must/have to+动词原形 ·否定:mustn't(禁止)/don't have to(不必) 3.例句: ●Ve must study hard. You mustn't park here. 知识点三:情态动词 1.基础含义及用法 1.核心情态动词: .can:I can speak English and Chinese. may:May I borrow your pen? must:You must wear a seatbelt. should:We should help each other. 2.否定式与疑问式 1.结构对比: ●can→can't:Ican't swim across the river. ●must→nustn't:You mustr't park here. should-shouldn't:You shouldn't eat too much candy. 3 高中选择性必修第三册重庆大学版 【寒假专版】 A版知识点全解 3.情态动词表推测 1.推测用法: 。must(肯定):He must be at home. 。may/might(可能):It may rain tomorrow. ●can't(否定):She can'tbel0 years old. 解题小妙招 非谓作状看逻辑,目的要用不定式:主动doing被动done,分词作状看主从。 名词性从句辨类型,连接词选用看成分:缺主宾表用what,陈述用that疑问whether。 非谓作定分时段,现在分词表进行,过去分词表完成:不定式作定表将来,动宾关系要记牢。 综合辨析先拆分,非谓主从各判断:逻辑关系是核心,连接词选用靠成分。 考法精析 考法一:非谓语动词作定语辨析 核心区别: 。分词作定语:表正在进行/已完成(a running dog/the fallen leaves) ·不定式作定语:表将来动作(homework to do/a meeting to be held) 真题对比: ·The meeting being held now is important.(现在分词,正在进行) ·The meeting to be held tomorrow is important.(不定式,将来) 考法二:非谓语动词作状语辨析 真题1(语法填空): -(improve)his spoken English,he practices speaking with foreigners every day. 答案:To improve 解析:此处表目的”为了提升”,不定式作目的状语 真题2(单项选择): by the teacher's words,the students decided to study harder A.Encouraging B.Encouraged C.To encourage D.Encourage 答案:B 解析:过去分词表被动(学生被鼓励) 高中选择性必修第三册重庆大学版 【寒假专版】 A版知识点全解 考法三:综合应用 真题1(单项选择): -the project on time,we_ask for help,but the problem is_we can find enough volunteers. A.To finish;must;that B.Finishing;might;if C.Finish;should;whether D.To finish;may,whether 答案:D 解析:不定式表目的(To finish),may表可能性,whether引导表语从句 真题2(语法填空): The teacher suggested_(hold)a debate,but we are not sure_we can prepare it well.Some students think we needn't_(worry)because weget help from our monitor. 答案:holding;whether,:wory,can 解析:suggest后接动名词(holding),whether引导宾语从句,needn't后接动词原形(woy),can表 能力

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Unit 1 Choice and Decision1-2025-2026学年高中英语选修三语法知识点全解(重大版)
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Unit 1 Choice and Decision1-2025-2026学年高中英语选修三语法知识点全解(重大版)
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