If 引导的条件状语从句
If 引导的条件状语从句遵循主过从过、主将从现的原则。
主将从现（主情从现、主祈从现）
If it rains tomorrow,I won't climb the hills。
If it doesn’t rain tomorrow，I will go to the countryside with my
friends。
If 引导的条件状语从句
If 引导的条件状语从句遵循主过从过、主将从现的原则.
主将从现（主情从现、主祈从现）
If you will help me,I'll finish it on time.
We may go out if it's fine tomorrow。
If you finish your homework,you can watch TV。
Please call me if you go shopping next Sunday.
If I go there，I'll take her some flowers.
We’ll stay at home if it rains tomorrow.
Please call me if he’s at home。
If you work harder，you’ll pass the exam。
She will visit her grandpa if she has time tomorrow。
We'll take a taxi to the city if the train doesn't arrive on time。
The teacher will be angry if he is late.
If引导的条件状语从句与unless引导的条件状语从句的转换
If+否定形式=unless+肯定形式 You won’t pass the exam if you don't work hard。
教学设计 IF引导的条件状语从句
一、教材、学生分析
初中英语语法，梳理总结。
二、教学目标
1 知识目标：正确运用if 引导的条件状语从句。
2 能力目标：能用if 引导的条件状语从句作出假设，用will谈论结果。
3 情感目标：围绕情景图片展开话题，提高他们学习英语的兴趣，竞争合作的小组活动培养团队学习精神。
三、教学重点和难点
重点: if引导的条件状语从句的基本结构。
难点: 条件状语从句的主、从句中的时态。
四、教学方法
口授讲解、对话互动、游戏、习题练习
五、教学过程
Step 1） 导入 Warming up and Leading in
1. Enjoy an English song : If you are happy
2 Ask some questions.
If you are happy, what will you do?
If I am happy, I will smile.
If you are sad, what will you do?
If I am sad, I will cry.
Step 2). 语法讲解
1、show picture 1:主将从现
If he has a lot of money, he’ll buy a big house.
2、show picture 2:主现从现（客观真理、常态事实等）
If you heat ice it turns to water. (也可用will turn)如果把冰加热，它就会化成水。）
3、unless和if not
You will miss the train unless you hurry= You will miss the train if you don’t hurry.
4、“如果”和“是否”分清楚
Step 3）口头运用
1、 看图编句，用if.
If
引导的条件状语从句
If
引导的条件状语从句遵循主过从过、主将从现的原则。
主将从现（主情从现、主祈从现）
If it rains tomorrow,I won
’
t climb the hills.
If
it
doesn
’
t
rain
tomorrow,I
will
go
to
the
countryside with
my
friends.
If
引导的条件状语从句
If
引导的条件状语从句遵循主过从过、主将从现的原则。
主将从现（主情从现、主祈从现）
If you will help me,I'll finish it on time.
We may go out if it's fine tomorrow.
If you finish your homework,you can watch TV
.
Please call me if you go shopping next Sunday.
If
I go there
，
I'll take her some flowers.
We'll stay at home
i
f
it rains tomorrow.
Please call me
if
he
’
s at home.
If
you work harder,you
’
ll pass the exam.
She will visit her grandpa
if
she has time tomorrow.
We
’
ll take a taxi to the city
if
the train doesn
’
t arrive on time.
The teacher will be angry
i
f
he is late.
If
引导的条件状语从句与
unless
引导的条件状语从句
的转换
If+
否定形式
=unless+
肯定形式
if引导的条件状语从句
用 法 例 句
① 主句为一般将来时态，if从句用一般
现在时态（即主将从现）。 We will stay at home if it rains tomorrow.
如果明天下雨，我将要呆在家。
② 主句中含有情态动词，if从句用一般现在时态。 If you finish your homework, you can go
home now. 如果你做完了作业，你现在可以回家了。
③ 主句为祈使句，if从句用一般现在时态。 Don’t jump into the river if you feel very
hot. 如果你感到很热，不要跳入河里。
④ 主句为过去将来时，if从句用一般过去时态（如果涉及到be动词，一律都用were）。此时，表达的是和现实相反的推测，用虚拟语气。 If I were you, I wouldn’t do it like that.
如果我是你，我就不会那么做的。
If you gave me some money, I would be very
happy. 如果你给我一些钱，我就会很高兴的。
【边学边做】用括号内所给词的正确形式填空。
1. What will you buy if you ________（have）a lot of money?2. If it ________（not snow）tomorrow, we will feel unhappy.3.
You mustn’t go to school if you ________（be）still in bed.4. If he _______（be）at home at that time, he would know it.5. Please
show me the way if you ________（know）it.6. You will hurt your teeth if you ________（eat）too much candy.7. If you gave
