适配高三一轮复习|可直接打印上课
统一标记规范:
三长【中括号 [ ]】|两短【小括号 ( )】|并列连词【三角符号△】
核心口诀:三长、两短、一并列
I. Teaching Objectives
1. 帮助学生掌握英语长难句的基本分析方法。
2. 使学生能够识别并理解长难句中的主干和修饰成分。
3. 提升学生的阅读理解能力,特别是在处理复杂句子结构时的能力。
II. Key Teaching Points
1. 学会识别修饰成分(统一口诀:三长两短一并列),配套专属标记符号
2. 掌握长难句分析的方法:找主干和符号标记分析法。
III. Difficult Teaching Points
1. 如何快速准确地找出长难句的主干。
2. 规范使用符号区分各类修饰,清晰拆分句子结构。
IV. Teaching Procedures
Step 1 Reviewing and thinking
1. 回顾英语的五大基本句型和三大句子结构。
2. 课堂思考问题:是什么让句子变得又长又难?
核心修饰成分总结
(口诀:三长两短一并列+专属标记规则)
- 三长「用中括号 [ ] 标注」
① 介词短语 ② 各类从句(定语从句/状语从句/名词性从句)③ 非谓语动词短语(to do / doing / done)
- 两短「用小括号 ( ) 标注」
① 形容词短语 ② 副词短语
- 一并列「用 △ 标出并列连词」:由and/but/or/yet等并列连词连接的并列结构
💡【设计意图】
通过回顾英语句子结构和句型,激活已知,为下文分析句子铺垫。搭配专属区分符号,降低学生区分各类修饰的难度,方便快速识别长难句构成特点。
Step 2. Explanation
本节课两大核心分析技巧:
① 找主干 ② 符号标记分析法
(一)Locate the sentence trunk
1. 解题操作步骤
① 找出句子中所有谓语动词(排除非谓语)
② 往前判断有无△并列连词/从句引导词
③ 拆分从句,提取主句主谓宾主干
2. 真题示范例句(2025新课标I卷阅读A篇)
原句:We’ll record local plant varieties while collecting environmental data and carrying out species surveys.
标记后完整句子:
We’ll record local plant varieties [while collecting environmental data △and carrying out species surveys].
逐段拆解(三长两短一并列角度)
1. [while collecting environmental data △and carrying out species surveys] 整体为三长——状语从句的省略,所以用中括号;
2. △and 是并列连词,属于一并列标记,连接两组并列非谓语:collecting... 与 carrying...;
3. 本句无形容词/副词短语,不存在“两短”成分;
4. 句子主干:We’ll record local plant varieties
3. 小组合作练习题
① 原文【2025新课标I卷 C篇】
标记后句子:
[According to this research], readers absorb less deep information [when scrolling digital articles], [which lack the slow thinking rhythm (of printed books)].
主干:
readers absorb less deep information
逐段拆解
1. [According to this research] 三长——介词短语;
2. [when scrolling digital articles] 三长——状语从句;
3. [which lack the slow thinking rhythm (of printed books)] 三长——定语从句;
4. (of printed books) 三长——介词短语,修饰rhythm,小括号标注;
5. 无并列连词,无“一并列”结构。
② 原文【2026新课标II卷 D篇】
标记后句子:
[Using data (covering over two billion animal observation records)], researchers explored [how citizen science affects global biodiversity research].
主干:researchers explored how citizen science affects global biodiversity research
逐段拆解
1. [Using data (covering over two billion animal observation records)] 外层整体三长——非谓语短语;
2. 【covering over two billion animal observation records)】三长——非谓语动词短语-现在分词短语做定语修饰data;
3. [how citizen science affects global biodiversity research] 三长——宾语从句;
4. 无并列连词,无并列结构。
4. 课堂独立练习巩固
💡【设计意图】
采用教师讲解—示范演示—小组合作—个人练习递进模式,让学生熟练掌握提取主干、规范标记修饰成分的完整逻辑。
(二)Symbol Marking Method
1. 符号标记完整操作流程
1)先找并列连词,用 △ 做好标记;
2)中括号 [ ] 圈出全部“三长”修饰;小括号 ( ) 圈出“两短”修饰;
3)剥离所有标记修饰,剩余内容即为句子主干;
4)先翻译主干,再依次补充各类修饰内容;
5)调整语序,贴合中文表达习惯。
2. 示范真题(2026新课标II卷)
原句:Ecological platforms can use the research data to guide researchers to under-sampled regions — and even rare creatures — that have barely been recorded by scientists.
标记后完整句子:
Ecological platforms can use the research data to guide researchers [to under-sampled regions — △and even rare creatures — 【that have barely been recorded by scientists].
逐段拆解(三长两短一并列)
1. [to under-sampled regions — △and even rare creatures — 【that have barely been recorded by scientists】] 外层为三长——介词短语;
2. △and 一并列标记,并列核心名词 regions 与 rare creatures;
3. (that have barely been recorded by scientists) 三长——定语从句,修饰前面两类事物;
4. 主干:Ecological platforms can use the research data to guide researchers
5. 整句翻译:生态平台可以利用这份研究数据,引导研究者前往那些采样不足的区域,甚至是几乎未被科学家记录过的珍稀生物所在地。
3. 小组合作分析长难句
原句:The purpose of this paper is to explain the value of slow reading, including a full analysis of its advantages and practical operations, and to teach readers how to form this reading habit if they hope to improve their reading ability.
标记后句子:
The purpose (of this paper)is to explain [the value (of slow reading)], [including a full analysis (of its advantages △and practical operations)], △and to teach readers [how to form this reading habit (if they hope to improve their reading ability)].
逐段拆解
1.The purpose [ of this paper] 三长——介词短语;
2. the value【of slow reading】,【of slow reading】三长,介词短语;
3. [including a full analysis (of its advantages △and practical operations)] 外层三长非谓语,△and并列advantages与operations;
4. △and 第二个并列连词,并列主句两个表语:to explain... / to teach...;
5. [how to form this reading habit 【if they hope to improve their reading ability】] 外层三长疑问词+不定式(相当于宾语从句,内层if...三长,条件状语从句修饰。
4. 综合真题配套练习
① 阅读理解单选
标记后原文句子:
Ecological platforms can use the research data to guide researchers [to under-sampled regions — △and even rare creatures — 【that have barely been recorded by scientists】]. [To raise the accuracy (of field data)], such platforms can also invite professional biologists to check [users’ uploaded wildlife photos].
拆解要点
1. [To raise the accuracy (of field data)] 三长非谓语作目的状语,(of field data)三长修饰accuracy;
2. [users’ uploaded wildlife photos] 形容词短语做定语;
3. △and 并列regions与rare creatures。
题干:What suggestion does the researcher put forward for ecological platforms?
A. Recheck historical data from remote areas.
B. Invite professionals to verify uploaded images.
C. Confirm personal information of all users.
D. Provide training for amateur wildlife observers.
② 语法填空
标记句子:
Besides, the plant exhibition hall (beside the main gate) leads visitors to experience [the plant communication routes (formed by ancient international trade)].
拆解要点
1. (beside the main gate) 三长介词短语,修饰主语hall;
2. [the plant communication routes (formed by ancient international trade)] 外层三长介词短语,内层(formed by...)两短分词修饰routes;
3. 无并列连词,无并列结构。
💡【设计意图】
将句子拆分技巧和高考题型结合,依托“三长两短一并列”搭配专属符号识别修饰成分,可视化区分句子结构,实现语法知识点直接对接考场得分。
Step 3 Summary
一、核心方法复盘
1. 两大核心解题技巧:提取主干、符号标记划分修饰成分
2. 固定标记规则牢记:
三长(介词短语/从句/非谓语)→ [ ] 中括号
两短(形短短语/副短短语)→ ( ) 小括号
并列连词and/but/or → △三角符号标注
3. 解题顺序:符号标注修饰结构 → 拆分主从句 → 先理解主干,再补充修饰信息
二、高三高频易错提醒
1. 混淆非谓语动词(三长,标中括号)与谓语动词,错把修饰成分当作句子主干
2. 长短标记混用,短形容词短语误用中括号,结构拆分混乱
3. 忽略△标注并列连词,误判并列成分,缩小或扩大句子主干范围
Step 4 Homework
分层课后作业(适配不同层次学生)
1. 基础必做题|全体学生完成
选取6道2025新课标I卷、2026新课标II卷阅读真题长难句,每道句子完成4项任务:
① 规范符号标注:三长标[ ]、两短标( )、并列连词画△;
② 标注每一处修饰属于三长/两短/并列;
③ 写出完整句子主干;
④ 通顺、完整翻译整句。
2. 提升选做题|中等生、优等生完成
1)任选3道课堂讲过的真题长难句,保留原意,改写为简单短句;
2)自主整理5组高考高频修饰结构,严格按照符号规则标注,下节课课堂分享。
3. 拓展拔高题|尖子生选做
1)从近期月考阅读摘抄4道长难句,按照课堂口诀、符号规则独立完整结构分析;
2)自主写80词左右英文段落,同时包含三长类、两短类修饰结构,并用本节课标记法自检拆分。
💡作业设计目的
分层任务匹配不同基础学生,全部素材选用近两年高考真题,统一口诀+标准化符号体系,让学生形成固定解题习惯,实现课堂知识点直接转化为应试能力。
补充说明
全文所有例句均配套完整「三长/两短/一并列」分层拆解,每一处括号、三角符号都对应明确语法类别,课堂可直接板书给学生对照理解,逻辑统一、无概念冲突,完全适配高三考场做题标准。