Unit 10 If you go to the party, you'll have a great time! Section B 语法课件：If引导的条件状语从句（22张PPT））

If you miss my party,
you will be sorry.

if clause
从句
main clause
主句
If sentences
if 引导的条件状语从句
FIRST
SECOND
THIRD
ZERO
If I am late for school,
my teacher gets angry.
If clause
Main clause
If + Present simple
Present simple
If I oversleep …
I miss the bus.
If I miss the bus, I am late for school.
If I am late for school, my teacher gets angry.
If I go to London,
I will see the Big Ben.
If clause
Main clause
If + Present tense
will / can / may / must + verb
If I go to London …
I will see the Big Ben.
If I go to Buckingham Palace,
I can take a photo of the Royal Guard.
If you go to London,
you must look right before crossing a street
if 引导的条件状语从句
Watch and learn
What tenses do the sentences use?
一般现在时
一般将来时
Watch and learn
这些句子都表示对事情的结果进行预测。
Can you tell the conjunction (连词) that connects the two parts of the sentences?
What does it mean?
Watch and learn
What’s the meaning of the “do” here?
If you take the bus to the party, you’ll be late.
If you stay at home, you’ll be sorry.
时态：
1. 如果主句是一般将来时，从句常用一般现在时。即应遵循“主将从现”的原则，
If she comes to see me tomorrow, I’ll be happy.
If it snows tomorrow, I will not go to the park.
won’t
主将从现
2. 如果主句含有must /can/may 等情态动词，从句一般用___________。
You must stop if the traffic light ____ (be) red.
is
一般现在时
3. 如果主句是祈使句， 从句也常用___________。
一般现在时
Please stay at home if it _____ 　　　　(rain) tomorrow.
rains
主情从现
主祈从现
用 if…will 造句
if I join lions. I will travel around the world
If I have a lot of money, I will buy a big house.
中考预热
1. You can surf the Internet ______you want to know about the 2020 World Middle School Games.
A . Until B . After C . if D . Unless
2. If I _____a two-week holiday next year, I will take part in a short study tour to Beijing University.
A. took??? B. take? ?? C. will take ??? D. are taking
C
B
C
( ) 4. If it ______ sunny tomorrow, I ____ boating.
A. is go B. will be, go
C. is, will go D. will be, will go
( ) 5. -- what will you do if it ______ tomorrow,
--I’ll stay at home and watch TV.
A. rain B. rains
C. will rain D. is raining
C
B
( ) 6. If he ______, I ______ him the time.
A. comes, tell B. will come, will tell
C. comes, will tell D. will come, tell
( ) 7. If it ______, it ______cold.
A. snows, will be B. snows, is
C. will snow, will be D. will snow, is
( )8. If you ______a stone into water, it ______.
A. put, sinks B. put, will sink
C. will put, sinks D. will put, will sink
C
B
A