Unit5语法专项课件- 后缀-ty -ity+定语从句2026-2027学年仁爱科普版英语九年级上册

该初中英语课件系统梳理了仁爱九年级上册Unit5的后缀-ty/-ity构词法及定语从句语法点，通过模块划分构建知识网络。后缀部分区分短音节-ty与多音节-ity的变形规则，搭配核心词汇对照表和固定短语，衔接前单元形成完整词性转换体系。定语从句从基础概念入手，对比that与which的用法及特殊情况，形成从规则到应用的逻辑脉络。 其亮点在于采用分层练习与易错点精准突破的复习策略，如后缀专项设置词形填空、单句改错，定语从句设计合并句子、汉译英等梯度练习，培养学生的语言应用能力和逻辑思维品质。通过解题技巧总结与核心易混点对比，帮助学生高效巩固知识，教师可依托此资料实现针对性复习教学。

教学课件 仁爱英语九年级上册 Unit5 语法专项 ——后缀-ty/-ity+定语从句 全解精讲+分层练习 1 1. 掌握-ty、-ity形容词变名词构词规则 2. 熟记高频变形词汇及固定短语搭配 3. 理解定语从句、先行词、关系代词概念 4. 分清that与which通用及专属用法 5. 掌握关系代词省略规则、特殊禁忌 学习目标 模块一 后缀-ty/-ity 知识点导入 -ty、-ity是抽象名词专属后缀，中考高频考点 核心规则：形容词 → 抽象名词 词义：表示性质、状态、特质、程度 衔接前单元语法，形成完整词性转换体系 两类后缀适配不同音节、不同拼写单词 -ty 构词规则详解 -ty 多用于短音节形容词，拼写基本不变 直接在形容词词尾加后缀，无需变形 核心词汇：safe、honest、difficult、real 变形后均为不可数抽象名词 -ty 核心词汇对照表 形容词 名词 释义 safe safety 安全 honest honesty 诚实 difficult difficulty 困难 real reality 现实 -ity 构词规则详解 -ity 多用于多音节长形容词 多数单词需要微调词根拼写再加后缀 变形难度更高，是考试易错重点 多表示品质、能力、可能性、责任 固定搭配多，适配写作与句型填空 -ity 核心词汇对照表 形容词 名词 释义 curious curiosity 好奇心 creative creativity 创造力 possible possibility 可能性 responsible responsibility 责任 后缀变形例句1 1. We should pay attention to personal safety. 译：我们应当注重个人安全。 考点：safety为safe的抽象名词，作宾语 2. Honesty is the best virtue in our life. 译：诚实是我们生活中最好的美德。 后缀变形例句2 1. Everyone has the responsibility to protect nature. 译：每个人都有保护自然的责任。 2. There is a possibility of success in the experiment. 译：这次实验存在成功的可能性。 3. Curiosity drives us to explore the unknown. 后缀固定必考搭配 1. personal safety 人身安全 2. have difficulty (in) doing sth. 做某事有困难 3. take responsibility for 对……负责 4. There is a possibility that... 有……的可能 5. virtual reality 虚拟现实 后缀专项练习1 词形填空 1. We should face every ____________ (difficult) bravely. 2. ____________ (honest) is a valuable personal quality. 3. He takes full ____________ (responsible) for the mistake. 4. ____________ (curious) helps us learn new knowledge. difficulty Honesty responsibility Curiosity 后缀专项练习2 选词填空 词库：reality、safety、possibility、creativity 1. We must ensure the ______________ of students at school. 2. Hard work can turn dreams into ______________. 3. ______________ makes people invent new things. 4. No one can refuse the ______________ of change. safety reality Creativity possibility 后缀专项练习3 单句改错 1. It is difficulty to finish the task in one day. 2. He has no responsible for this accident. 3. The curious of children is very strong. 4. We doubt the possible of this plan. difficulty→difficult responsible→responsibility curious→curiosity possible→possibility 模块二 定语从句Ⅰ 基础概念 定语从句：用一个句子修饰名词/代词 先行词：被修饰的名词、代词（主句中） 关系代词：that/which，连接主从句 作用：指代先行词、充当从句成分 核心：修饰事物、动物，that可修饰人 that & which 基础用法对比 关系代词 指代对象 句子成分 that 人、事物、动物 主语、宾语 which 事物、动物 主语、宾语 普通事物先行词，二者可互换使用 关系代词省略规则 1. 作从句宾语：that/which 可省略 例：The book (that) I like is interesting. 2. 作从句主语：绝对不能省略 例：The bike that runs fast is new. 做题优先判断从句缺主语还是宾语 只能用that、不用which特殊情况 1. 先行词被最高级修饰：the best、the greatest 2. 先行词被序数词修饰：the first、the last 3. 先行词为不定代词：nothing、everything 以上三种情况，一律只用that 定语从句例句精讲 1. The tech that changes our life is amazing.（主不省） 译：改变我们生活的科技十分神奇。 2. The gift (which) I received is beautiful.（宾可省） 译：我收到的这份礼物很漂亮。 定语从句练习1 填空 填入正确关系代词that/which，可省写/ 1. The movie _____________ we watched is wonderful. 2. This is the best book _____________ I have ever read. 3. Nothing _____________ he does is useless. 4. The bird _____________ sings well is very cute. that/which that that that/which 定语从句练习2 单项选择 1. The train ________ goes to Guangzhou is fast. A. that B. who C. where 2. This is the first museum ________ I have visited. A. which B. that C. what 3. There is everything ________ we need in the shop. A. that B. which C. whom 4. The robot ________ the worker uses is smart. A. / B. what C. where A B A A 定语从句练习3 合并句子 合并两句，改写为含定语从句的复合句 1. This is the pen. I bought the pen yesterday. 2. The tree is tall. The tree stands by the river. 3. The story is moving. He told the story. This is the pen that/which I bought yesterday. The tree that/which stands by the river is tall. The story that/which he told is moving. 定语从句练习4 单句改错 找出错误并改正，重点关系代词用法 1. This is the hardest task which I have ever done. 2. The machine that it works well is very old. 3. The thing who he likes is painting. which→that（最高级修饰先行词） 删掉it（that已指代先行词，成分重复） who→that/which（事物不用who） 定语从句练习5 汉译英 1. 这是我见过最漂亮的公园。 2. 他昨天买的手机很好用。 3. 改变世界的科技十分伟大。 4. 我需要的一切东西都准备好了。 This is the most beautiful park that I have ever seen. The phone that/which he bought yesterday works well. The technology that changes the world is great. Everything that I need is ready. 后缀构词法 易错点汇总 1. 形容词必须变形，不可直接作介词宾语 2. 固定搭配difficulty、responsibility切勿写错 3. -ity变形多有词根改动，切忌凭感觉拼写 4. 抽象名词大多不可数，不加s 定语从句 易错点汇总 1. 最高级、序数词、不定代词后只用that 2. 关系代词作主语绝对不能省略 3. 从句中禁止重复出现指代先行词的代词 4. 事物先行词不能用who、whom指代 核心易混点对比复盘 1. -ty短词变形、-ity长词变形，区分记忆 2. that可指人/物，which仅指事物 3. 主语不省代词、宾语可省代词 4. 特殊场景死守that，拒绝用which 解题技巧（构词法） 1. 冠词、介词、所有格后必填抽象名词 2. 先判断后缀类型，再核对拼写变形 3. 优先回忆固定搭配，快速锁定答案 解题技巧（定语从句） 1. 先找先行词，判断是人还是物 2. 再看从句缺主语还是宾语 3. 最后检查是否有特殊限定词 4. 排查从句多余代词错误 课堂小结1（后缀-ty/-ity） 1. 掌握形容词变抽象名词两类后缀规则 2. 熟记全部高频词汇与必考固定搭配 3. 熟练应对填空、改错、短文题型 4. 可用于写作提升句式高级度 课堂小结2（定语从句） 1. 掌握that/which基础指代与互换规则 2. 牢记只用that的三种特殊场景 3. 掌握关系代词省略核心规则 4. 熟练合并句子、改错、单选题型 教学课件 Unit5 语法专项 ——后缀-ty/-ity+定语从句 Thank you for listening! 31 $