资源简介

(共17张PPT)
主将从现
主将从现是指在时间状语从句 和条件状语从句中，如果主句是一般将来时，从句用一般现在时替代一般将来时。
什么是主将从现？
if :If you ask him, he will help you.
引导条件状语从句
的词有哪些？
unless :I’ll go there tomorrow unless it rains.
when , while , before , after , untill , till , since , as soon as ,
引导时间状语从句
的词有哪些？
1.主将从现
2.主祈从现
3.主情从现
主将从现有哪些内容？
主句是一般将来时，从句用一般现在时。
When I grow up, I’ll be a doctor.
If you go to the party, you will be happy.
1.主将从现
主句是祈使句，从句用一般现在时。
Don’t laugh at me when I make a mistake.
2.主祈从现
主句中含有情态动词，从句用一般现在时。
You should be quiet when you are in the reading room.
3.主情从现
Exercise
1. If I come, I ________ ( see ) you.
2. If it is fine, we______( go ) for a walk.
3. If it rains, they _________ ( stay ) at home.
4. You will spoil it if you ______ ( not be ) careful.
will see
will go
will stay
aren’t
5. We will be very much pleased if you _____( come ).
6. Will you help me if I _____ ( need ) you.
7. They will get wet if it ____ ( rain ).
8. We will answer if we ___( can ).
9. If you eat too much, you ______( get ) ill.
come
need
rains
can
will get
( ) 10. ---What will Bill do if he ____in the test
---He will try again.
fail B. fails
C. will fail D. is failing
( ) 11. Please tell her the news when she_____.
OK, I will.
A. comes B. will come.
C. come D. would come
B
A
( ) 12. The students will plant trees if it ___ tomorrow.
A. didn’t rain B. hasn’t rained C. won’t rain D. doesn’t rain
( ) 13. We__ home if there is no bus.
---Oh, what a pity!
will walk B. have walked
C. walked D. walk
D
A
( ) 14 .If it _____ tomorrow, I’ll go by car.
A. rain B. will rain
C. rains D. would rain
( ) 15.If Mary____next Sunday, we will go boating together.
A. will come B. comes
C. shall come
D. shouldcome
C
B
( ) 16. --- Don’t forget to ask him to write to me.
--- I won’t. As soon as he____, I’ll ask him to write to you.
A. will come
B. came
C. comes
D. is coming
C
( )17. --- Can I go to Beijing for my holiday, Dad
--- You can when you _______ a bit older.
A. will get B. get
C. are getting D. got
( )18. If he _______harder, he will catch up with us soon.
A. study B. studies
C. will study D. studied
B
B
( )19. Frank ____to see his grandma if he __ free tomorrow.
A. will come; will be
B. comes; is
C. will come; is
D. comes; will be
A

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