外研版九年级上册Module 6 Problems Unit 3 课件(共16张PPT)

(共16张PPT)
Unit 3 Language in use
Module 6 Problems
Learning aims:
To summarize and practice the
if-clause
2.To learn to describe a problem
and give advice with if-clause
3.To be able to write about a problem
If引导的条件状语从句：
结构 用途 含义 例句
if从句 + 祈使句 表达建议 如果……就…… If you don’t feel well, please go to see the doctor.
if从句 + 主句 表达某种假设 如果……就…… If he doesn’t work hard, he’ll fail his exams.
1.从句表示某种假设的情况，主句表示此种情况所导致的结果。
2.从句如果用一般现在时，主句的谓语动词多用一般将来时或“情态动词+动词原形”。
Have a try
1.（2015江西）
There will be less pollution___ more people use public transportation.
A. but B. though C. unless D. if
2.（2015贵州铜仁）
—You won’t pass the exam ________you don’t work hard.
—OK, I’ll do my best.
A. and B. but C. if D. so
3.(2015吉林）
I will be happy ______ you come to my party.
if B. though C. or D. whether
4.(2015湖南永州）
You will learn English well _____ you often use it.
A. or B. and C. if D. but
5.(2015广西贵港）
You’ll do much better in your exam ______you are more careful
with your spelling.
A. if B. although C. unless D. whether
Speaking time
Rewrite the sentences with if.
If you do not listen in class, you will not understand what to do.
If you don’t eat some breakfast, you will get hungry at school.
1
P46
Listen in class, or you will not understand
what to do.
1. Eat some breakfast, or you’ll get hungry at school.
You will get hungry at school if you don’t eat some breakfast.
2. Hurry up! We’ll be late!
3. Read the book carefully. Then you will not make mistakes.
4. Don’t watch too much TV, or your eyes will hurt.
5. Work harder! You will get higher marks.
If you don’t hurry up, you will be late.
If you read the book carefully, you will not make mistakes.
If you watch too much TV, your eyes will hurt.
If you work harder, you will get higher marks.
You will be late if you don’t hurry up.
You will not make mistakes if you read the book carefully.
Your eyes will hurt if you watch too much TV.
You will get higher marks if you work harder.
Reading time
Listening time
7
P48
Listen to the conversation and answer the questions.
1 What is the girl’s problem
It is difficult to get to sleep at night.
She falls asleep very late.
2 Is it a common problem among teenagers
Yes, it is. B. No, it isn’t.
3 What does the doctor advise the girl to do
Have cool water before she goes to bed.
Take enough exercise.
4 What does the doctor advise the girl not to do
A. Go to bed early
B. Watch TV or play on the computer before she
go to bed.
Writing: making a problem page.
Work in groups
My problem:
Dear… *
*
*
*
*
Your advice:
Dear… *
*
*
*
*
★在if引导的条件状语从句中，如果主句为一般将来时，从句常用一般现在时。
★如果主句含有情态动词，if引导的条件状语从句一般也要用一般现在时。
Summary