(共15张PPT)
Section 2 Grammar
Unit 7 The secret of memory
2024新版沪教牛津8年级上册
海上列车
在列车消失之前，学生快速回答所需要填的空
If she is busy, I ____ help her.
Get up early, ____ you’ll miss the first bus.
Study hard, ____ you’ll get good grades.
Conditional Sentences
概念
条件状语从句:
从句在句中作条件状语成分。
由从属连词if, unless, as / so long as等引导，与主句连接。
从句位于句首，常用逗号与主句分开，若在句末，其前一般不加逗号。
引导词 例句 注意事项
if(如果) If she is busy, I will not bother her. 从句的时态不可用将来时，只能用现在时表将来时。(主将从现)
unless (除非；如果不) Unless it rains, the game will continue. = If it doesn’t rain, the game will continue.
as / so long as (只要) As long as you can take good care of it, you can keep it as long as you want.
引导词
条件状语从句的时态问题
As soon as I pass the exam，my mom will give me 100yuan as a reward.
I will play badminton with my friends if it doesn’t rain today.
条件状语从句→主将从现
注意
主句不遵循“主将从现”的情况
1. 主句中出现情态动词
e.g. If you have questions, you can ask me.
2. 主句是祈使句
e.g. Ask me if you have questions.
3. 主句是客观事实，用一般现在时
e.g. If you put the paper into a fire, it burns.
条件状语从句与祈使句的转换
1.祈使句, + and + 陈述句
=if引导的条件状语从句+陈述句
Get up before 5, and you’ll see the beautiful sunrise.
= If you get up before 5, you’ll see the beautiful sunrise.
条件状语从句与祈使句的转换
2.祈使句, + or + 陈述句
=(if … not)引导的条件状语从句+陈述句
Get up before 5, or you won’t see the beautiful sunrise.
= If you don’t get up before 5, you won’t see the beautiful sunrise.
Grammar practice
Read these if-clauses and match them with the results.
You won’t pass the exam __________ you study harder.
If it __________ (rain) tomorrow, we will stay at home and watch TV.
__________ you hurry up, you will be late for the meeting.
I will call you if I __________ (get) the news.
You can’t get good grades __________ you listen carefully in class.
Unless she __________ (come) here this afternoon, we won’t wait for her.
If they are free tomorrow, they __________ (go) to the park.
__________ you want to be healthy, you should eat more vegetables and fruits.
He won’t finish the work on time __________ he works hard.
Unless it __________ (snow), we will go on a picnic this weekend.
More practice
用所给词的适当形式填空或者填入适当的引导词。
unless
rains
Unless
get
unless
comes
will go
If
unless
snows
My name’s Tom, and I’m a Grade 8 student. Many of my classmates think Grade 8 is challenging, so I would like to share my tips on studying.
First, we need to use the right methods when we study. __________________ we use good study techniques, it will be very hard to remember things. For example, many students take notes in class, but they don’t look at them afterwards. __________________ we don’t review our notes regularly, we will quickly forget what we’ve studied.
It’s also very important to get enough sleep. If we stay up late, we __________________ (be) very tired the next day, and it __________________ (be) more difficult to pay attention in class. This will affect our grades. __________________ we don’t listen carefully in class, we won’t remember what the teacher said. In other words, __________________ we get enough sleep, we cannot study effectively.
Unless
If
will be
will be
If
unless
Thanks
2024年新版沪教牛津8上中小学教育资源及组卷应用平台
教案名称：Unit 7 The secret of memory – Conditional Sentences
教材：2024新版沪教牛津版 八年级上册
单元：Unit 7 The secret of memory
课题：条件状语从句的用法
课型：语法课
课时：1课时 (45分钟)
一、教学目标
1.知识目标：
理解并掌握条件状语从句的概念及其引导词（if, unless, as long as）。
掌握“主将从现”的基本用法及其三种例外情况。
学会将条件状语从句与祈使句进行转换。
2.能力目标：
能够正确使用条件状语从句完成句子和语篇填空。
能够在真实语境中运用条件句表达假设与结果。
3.情感目标：
培养学生良好的学习习惯，如复习笔记、保证睡眠等，增强学习效率意识。
二、教学重难点
1.教学重点：
条件状语从句的结构和用法。
“主将从现”规则的理解与应用。
条件句与祈使句的转换。
2.教学难点：
主句不遵循“主将从现”的三种特殊情况。
unless 与 if … not 的用法区别。
在真实语境中正确选择并运用条件句。
三、教学准备
多媒体课件（PPT），练习题纸（含填空与匹配题），板书设计
四、教学过程
Step 1: 导入（5分钟）
利用PPT中的“海上列车”情境，激发学生兴趣。
提问：If you miss the train, what will you do 引导学生初步感知条件句。
Step 2: 语法讲解（15分钟）
概念讲解：条件状语从句的定义、引导词、位置与标点。
时态规则：讲解“主将从现”原则，并结合例句说明。
特殊情况：讲解三种不遵循“主将从现”的情况（情态动词、祈使句、客观事实）。
句型转换：讲解“祈使句 + and/or + 陈述句”与条件句的转换。
Step 3: 练习与巩固（15分钟）
完成PPT中的“Grammar practice”和“More practice”部分。
学生独立完成填空与匹配题，教师巡视指导。
分组讨论答案，全班核对。
Step 4: 拓展运用（5分钟）
阅读Tom的学习建议短文，完成填空。
引导学生用条件句写出自己的学习建议。
Step 5: 小结与作业（5分钟）
总结本节课所学内容。
布置作业：用5个条件句写一段关于“How to improve your memory”的短文。
五、板书设计
Unit 7 The secret of memory
Grammar: Conditional Sentences
1. 结构：
If / Unless / As long as + 从句，主句
2. 时态规则：主将从现
If it rains, we will stay at home.
3. 例外情况：
- 情态动词：If you have questions, you can ask me.
- 祈使句：Ask me if you have questions.
- 客观事实：If you put paper in fire, it burns.
4. 句型转换：
- 祈使句 + and → If…, …
- 祈使句 + or → If… not…
5. 关键词：
if, unless, as long as, or, and
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