初中主将从现讲解与练习.ppt

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