Unit 7 Grammar 条件状语从句 课件2025-2026学年沪教版英语八年级上册

该初中英语课件聚焦条件状语从句，以“Lead-in”引入主题，从定义、引导词（if/unless）到用法（主将从现、主情从现、祈使句结构），结合练习题与期末考频考点，构建从基础理解到应用巩固的学习支架。 其亮点在于紧密对接中考，整合多校期末真题考点，通过“主将从现”“主情从现”的时态规则解析及if/unless互换练习，提升学生语言能力与思维品质。采用讲练结合法，学生可高效掌握语法应用，教师能直接用于课堂教学与备考复习。

Grammar Conditional sentences 1 期末考频考点 定义 出处 类型 题目 考点 铁一 语法选择 第（8） 主将从现 番禺中学 语法选择 第（8） unless 华南师大附中 完成句子 第（8） unless（主将从现） 天河中学 语法选择 第（8） 主将从现 白云区 语法选择 第（8） If（主情从现） https://pan.baidu.com/s/1dBUOykZfGkjoJj8YrmZuTw?pwd=7788 2 Lead-in Conditional sentences https://pan.baidu.com/s/1dBUOykZfGkjoJj8YrmZuTw?pwd=7788 3 Exercise 1. The ice ______ into water if you ______ it. A. will turn; heat B. will turn; will heat C. turns; heat D. turns; will heat 2. Our business won’t improve ______ we offer better service to our customers. A. because B. unless C. after D. since 3. In hot weather, food goes bad easily ______ it is kept in the fridge. A. Because B. if C. Unless D. since 4. They ______ the Great Wall unless it ______. A. will visit; will rain B. will visit; rains C. visit; will rain D. visit; rains 5. You ______ a toothache unless you ______ your teeth every day. A. will get; brush B. will get; will brush C. get; will brush D. get; brush C C B B A https://pan.baidu.com/s/1dBUOykZfGkjoJj8YrmZuTw?pwd=7788 4 条件状语从句 定义 if unless https://pan.baidu.com/s/1dBUOykZfGkjoJj8YrmZuTw?pwd=7788 5 条件状语从句 用法 You will catch the bus if you get up early. 2. He will be late for school unless he leaves now. 结构 = If you get up early, you will catch the bus. . = Unless he leaves now, he will be late for school. 主句+从句 从句，主句 位置 If/unless后面跟的是从句，剩下的部分是主句 https://pan.baidu.com/s/1dBUOykZfGkjoJj8YrmZuTw?pwd=7788 6 Conditional sentences 3. I won’t go shopping with you if I am not free tomorrow. = I won’t go shopping with you unless I am free tomorrow. 主将从现 从句：一般现在时 主句：一般将来时 标志词：always、usually、often、sometimes、seldom、never、every day/week/month等。 结构：看主语，I/you/复数，用V原，其他一律三单 标志词：tomorrow、next week/month/year、soon、in + 时间段、later等。 结构:will/be going to +V原 https://pan.baidu.com/s/1dBUOykZfGkjoJj8YrmZuTw?pwd=7788 7 条件状语从句 4. If you don’t finish your homework, you can’t watch TV. = Unless you finish your homework, you can’t watch TV. can, could, may, might, must, should, will, would, need,等 一般现在时 情态动词 主情从现 https://pan.baidu.com/s/1dBUOykZfGkjoJj8YrmZuTw?pwd=7788 8 条件状语从句 5. Open the window if you don’t feel cold. = Open the window unless you feel cold. 一般现在时 祈使句 结构： 1)V原 2)Be + adj. 3)Let + V原 主祈从现 6. If you take a fish out of water, it dies. 陈述一件事实永远用一般现在时 主现从现 一般现在时 https://pan.baidu.com/s/1dBUOykZfGkjoJj8YrmZuTw?pwd=7788 9 Exercise 用词的适当形式填空 comes will/can meet gets will stay will fail study Unless improve will lose more and more natural disasters unless https://pan.baidu.com/s/1dBUOykZfGkjoJj8YrmZuTw?pwd=7788 10 条件状语从句 If…not和unless 3. I won’t go shopping with you if I am not free tomorrow. = I won’t go shopping with you unless I am free tomorrow. 4. If you don’t finish your homework, you can’t watch TV. = Unless you finish your homework, you can’t watch TV. If…not=unless https://pan.baidu.com/s/1dBUOykZfGkjoJj8YrmZuTw?pwd=7788 11 Exercise 用unless和if…not来改写句子 You won’t pass your exams if you don’t study hard. We will play outside this afternoon if it doesn’t rain. You can’t send a letter if you don’t know the address. You can’t go in unless you are a member. https://pan.baidu.com/s/1dBUOykZfGkjoJj8YrmZuTw?pwd=7788 12 时态 Summary 13 Unless和if可互换吗 Summary 14 定义，位置和结构 Summary 15 Exercise 1. The ice ______ into water if you ______ it. A. will turn; heat B. will turn; will heat C. turns; heat D. turns; will heat 2. Our business won’t improve ______ we offer better service to our customers. A. because B. unless C. after D. since 3. In hot weather, food goes bad easily ______ it is kept in the fridge. A. Because B. if C. Unless D. since 4. They ______ the Great Wall unless it ______. A. will visit; will rain B. will visit; rains C. visit; will rain D. visit; rains 5. You ______ a toothache unless you ______ your teeth every day. A. will get; brush B. will get; will brush C. get; will brush D. get; brush C C B B A https://pan.baidu.com/s/1dBUOykZfGkjoJj8YrmZuTw?pwd=7788 16 随堂小测（期末真题） A 8．（1分）If you________ ice in a warm place，it________ into water. 铁一 A．putting，turns B．put，will turn C．will put，turn D．put，turns 8．In summer，food goes bad easily ________ it is put in the fridge. 番禺中学 A．until B．if C．unless D．When 8．（2分）除非你开窗，否则这个房间会很热的。华南师大附中 The room will get very hot you the window. 17. The temperature in North China is often below 0°C in winter.If you put water outside，it into ice.（ ）天河中学 turn B. will turn C. would turn D. is turning ___10___ Mabel does my maths homework, I may get a bad grade on the test.白云区 A. If B. Whether C. Unless D. Until B C B unless open https://pan.baidu.com/s/1dBUOykZfGkjoJj8YrmZuTw?pwd=7788 17 THANKS $