Unit 7 Be a Better Learner! 语法精讲与练习2025-2026学年仁爱科普版英语八年级下册

Unit 7 Be a Better Learner! 语法精讲与练习 1、 语法知识点精讲 1、后缀 -al 的用法 后缀 -al 是英语中常见的形容词后缀，通常加在名词后面，构成形容词，表示“与……有关的”“具有……性质的”。 核心要点： 1. 后缀 -al 通常加在名词后，构成形容词； 2. 部分由 -al 构成的形容词可作定语或表语； 3. 常见例外：少数名词加 -al 后含义有特定搭配（如 natural 表示“自然的”，而非“自然有关的”）。 后缀 -al 的构成规则 后缀 -al 通常直接加在名词词尾构成形容词，大部分名词无需改变拼写，但少数特殊情况需注意： ① 一般情况：名词 + -al → 形容词（如：nation → national、form → formal）； ② 以 -e 结尾的名词：直接加 -al（如：nature → natural、culture → cultural）； ③ 以 -ion 结尾的名词：去 -ion 加 -al（如：education → educational、attention → attentional（了解即可）； ④ 特殊例外：个别名词加 -al 后含义有特定指向（如：person → personal（个人的），而非“人的”；man → manual（手工的），而非“男人的”）。 常见例词及搭配： nature (n. 自然) → natural (adj. 自然的) → natural ability (天赋)、natural environment (自然环境) digit (n. 数字) → digital (adj. 数字的) → digital media (数字媒体)、digital watch (电子手表) person (n. 人) → personal (adj. 个人的) → personal information (个人信息)、personal opinion (个人观点) nation (n. 国家) → national (adj. 国家的) → national team (国家队) form (n. 形式) → formal (adj. 正式的) → formal meeting (正式会议)、formal dress (正装) music (n. 音乐) → musical (adj. 音乐的) → musical instrument (乐器)、musical performance (音乐表演) 基础名词 加 -al 构成的形容词 中文释义 课文原句/核心搭配 nature natural 自然的；天生的 The girl has a natural ability to learn languages.（天生的语言能力）；natural food（天然食物） digit digital 数字的；数码的 In the digital age, computers are important.（数字时代）；digital media（数字媒体）、digital watch（电子手表） person personal 个人的；私人的 personal information（个人信息）；personal needs（个人需求）；personal opinion（个人观点） nation national 国家的；民族的 national team（国家队）；national culture（民族文化） form formal 正式的；规范的 formal meeting（正式会议）；formal dress（正装）；formal language（正式语言） music musical 音乐的；与音乐相关的 musical instrument（乐器）；musical performance（音乐表演） 名词 加 -al 构成的形容词 课文中的例句 nature natural The girl has a natural ability to learn languages. digit digital In the digital age, computers are important parts of life. person personal You learn the language to satisfy your personal needs. form formal He wore a formal dress to the meeting. 2、时间状语从句 时间状语从句是用来表示主句动作发生时间的从句，由 when、while、before、after、until、as soon as 等时间连词引导。 时间状语从句是用来修饰主句动作发生的时间、先后顺序、同时性等的从句，由专门的时间连词引导，在复合句中作时间状语。 核心要点： 1. 时态规则：主句用一般将来时，从句用一般现在时表将来（即“主将从现”）；主句用过去进行时，从句常用一般过去时（描述同时发生的动作）； 2. 连词区别：when 可接延续性/非延续性动词，while 只接延续性动词（常用进行时），as soon as 表示“一……就……”； 3. 语序：从句用陈述句语序，不能倒装。 常用连词及例句： when（当……时）：I was working on a math problem when the bell rang.（当铃声响起时，我正在演算一道数学题。） while（当……时，同时）：While Li Xiang is watching TV, Liu Mei is doing her homework.（李翔看电视时，刘梅正在做作业。） before（在……之前）：I often search for information online before I cook a new dish.（做新菜之前，我经常上网查资料。） after（在……之后）：We went home after we finished our homework.（完成作业后，我们回家了。） until（直到……为止）：I didn’t understand the meaning until I looked it up in the dictionary.（直到查了词典，我才明白这个意思。） as soon as（一……就……）：Please tell me as soon as you finish your homework.（你一完成作业就告诉我。） 常用时间连词及分类 时间连词按含义可分为以下几类，每类的用法和语境各有侧重： 连词类别 常用连词 含义 核心用法 同时发生 when 当……时 可接延续性动词（动作持续一段时间）或非延续性动词（动作瞬间完成） while 当……时；与此同时 只能接延续性动词，从句常用进行时（强调主句和从句动作同时进行） 先后发生 before 在……之前 从句动作发生在主句动作之前 after 在……之后 从句动作发生在主句动作之后 直到……为止 until / till 直到……才 主句常用否定式（not...until），表示“直到从句动作发生，主句动作才发生” 一……就…… as soon as 一……就…… 从句动作一发生，主句动作立即发生，强调动作的即时性 时态规则（重点） 核心时态原则： 时间状语从句的时态需与主句时态保持一致，重点掌握以下3种情况： 1. 主句为一般将来时，从句用一般现在时表将来（主将从现） 说明：表示将来发生的动作，从句用一般现在时替代一般将来时，是八年级最常考的时态规则。 ① As soon as I finish my homework, I will go to the library.（我一完成作业就去图书馆。） ② We will have a picnic if it doesn’t rain tomorrow.（如果明天不下雨，我们就去野餐。） ③ I will call you before I leave home.（我离家前会给你打电话。） 2. 主句为过去进行时，从句用一般过去时 说明：表示主句动作正在进行时，从句动作突然发生（瞬间动作），常用 when 引导。 ① I was studying English when the phone rang.（我正在学英语，电话突然响了。） ② She was reading a book when her mother came back.（她妈妈回来时，她正在看书。） 3. 主句和从句均为一般过去时 说明：表示过去发生的两个先后或同时进行的动作，常用 after、before、while 引导。 ① After he finished his work, he went home.（他完成工作后就回家了。） ② While my father was watching TV, my mother was cooking.（我爸爸看电视时，妈妈正在做饭。）（注：while 连接两个过去进行时，表示同时进行） 易混淆连词辨析（when vs while） 连词 从句动词类型 从句时态 例句 when 延续性动词 一般过去时/过去进行时 When we were talking, the teacher came in.（我们正在聊天时，老师进来了。） 非延续性动词 一般过去时 When the rain stopped, we went out.（雨停时，我们出去了。）（stop 是瞬间动作） while 延续性动词 过去进行时 While she was singing, her sister was dancing.（她唱歌时，姐姐在跳舞。） 非延续性动词 不可以 × While the bell rang, we were having class.（错误，ring 是瞬间动作，应用 when） 2、 语法练习题 Exercise 1: 用括号内单词的适当形式（加后缀 -al）填空 1. She comes from a __________ (music) family, and her father is a famous pianist. 2. We should protect our __________ (person) information when shopping online. 3. There will be a __________ (nation) English competition next month. 4. The __________ (digit) age has changed the way we learn English. 5. It’s a __________ (nature) ability for some children to learn languages quickly. 6. You need to wear __________ (formal) clothes to attend the wedding. Exercise 2: 选择合适的连词填空（when/while/before/after/until/as soon as） 1. I will call you __________ I arrive at the airport. 2. __________ my mother was cooking, I was doing my homework. 3. We didn’t leave the classroom __________ the teacher came back. 4. __________ he finished his homework, he went out to play basketball. 5. I was reading a book __________ the phone rang. 6. Please wash your hands __________ you eat dinner. Exercise 3: 用括号内动词的适当形式填空 1. As soon as he __________ (come) back, we __________ (start) the meeting. 2. While she __________ (listen) to music, her brother __________ (knock) at the door. 3. He __________ (not go) to bed until he __________ (finish) his work last night. 4. I __________ (call) you when I __________ (get) the news tomorrow. 5. When I was young, I __________ (want) to be a teacher when I __________ (grow) up. Exercise 4: 按要求改写句子，使用指定的连词 1. He finished his homework. He watched TV.（用 after 连接） ___________________________ 2. I will go to bed. I finish reading this book.（用 until 连接） ___________________________ 3. The rain stopped. We went out for a walk.（用 as soon as 连接） ___________________________ 4. She is singing. Her sister is dancing.（用 while 连接） ___________________________ Exercise 5: 拓展题 - 完形填空（综合运用Unit 7语法知识点） 阅读下面短文，掌握其大意，然后从各题所给的A、B、C三个选项中选出最佳答案。 Learning English is important for us. It’s a __________ (1) ability to learn languages well. __________ (2) I was in Grade Seven, I found English very difficult. I couldn’t remember new words and I was afraid to speak English in public. My teacher told me that practice __________ (3) perfect. She advised me to read English aloud every morning and write down new words in a notebook. She also said that I should talk with my classmates in English __________ (4) I have time. __________ (5) I followed my teacher’s advice, my English improved a lot. Now I can speak English confidently. I know that __________ (6) I keep practicing, I will become better at English. 1. A. natural B. nature C. naturally 2. A. While B. When C. As soon as 3. A. make B. makes C. made 4. A. whenever B. before C. after 5. A. After B. Before C. Until 6. A. if B. when C. while 练习题答案 Exercise 1: 1. musical 2. personal 3. national 4. digital 5. natural 6. formal Exercise 2: 1. as soon as 2. While 3. until 4. After 5. when 6. before Exercise 3: 1. comes; will start 2. was listening; knocked 3. didn’t go; finished 4. will call; get 5. wanted; grew Exercise 4: 1. After he finished his homework, he watched TV. 2. I won’t go to bed until I finish reading this book. 3. As soon as the rain stopped, we went out for a walk. 4. While she is singing, her sister is dancing. Exercise 5: 1. A 2. B 3. B 4. A 5. A 6. A 学科网（北京）股份有限公司 $