课件16张PPT。Unit6 Topic3
语法专项课件
(条件状语从句)初中英语仁爱版八年级下册Unit 6 Enjoying Cycling Topic 3 Bicycle riding is good exercise.状语从句大观时间状语从句连接词大观ifso/as long assuppose如果,假如只要假设in case万一unless除非,如果不as/so far as就……而言If it snows tomorrow, we’ll have a day or two off.
如果他不邀请我们,我们就不去参加他的聚会。
She is sure to pass the examination unless she is ill.
她肯定会通过这次考试,除非她生病。时间状语从句连接词大观We won’t go to his party unless he invites us.
如果他不邀请我们,我们就不去参加他的聚会。
He won’t be able to catch up with us unless he runs faster.
他不可能赶上我们,除非他跑得更快一些。时间状语从句连接词大观易错点1在条件状语从句中,要注意时态一致。一般情况下,主句是一般将来时,从句用一般现在时(即“主将从现”或“主情从现”或“主祈从现” );主句是过去时态,从句也要用相应的过去时态。易错点1“主将从现”:条件状语从句要用一般现在时态表示将来的动作。If it doesn’t rain tomorrow, we’ll go to the park.
如果明天不下雨的话,我们就去公园。(从现)易错点1“主情从现”:条件状语从句中的主句可能是情态动词(can, may, might, must, should) + 动词原形的形式。If you want to pass the exam, you must study hard.
如果你想考试及格,你就必须努力学习。(从现)易错点1“主祈从现”:条件状语从句中的主句可能是祈使句。If you see him, please give him this note.
如果你看见他,把这个纸条给他。 (从现)易错点2if的用法对比易错点3unless与until的用法区别易错点3I won’t believe ______ I see it with my own eyes.
I don’t believe ______ I see it with my own eyes.unlessuntil主将从现not…until…unless与until的用法区别【典例1】用动词的正确形式填空。
1. If she ____ (be) kind to me , I __________(not argue) with her.
2. I want to know if he ________(come) tomorrow, if he _________(come), I __________(give) the massage to him. 考查条件状语从句的用法。遵循“主将从现”“主情从现”“主祈从现”原则。is
won’t arguewill comecomes
will give
【典例2】—Lucy, what about going camping if it ______ tomorrow?
—Sounds great!
A. didn’t rain B. doesn’t rain
C. rains D. won’t rain考查条件状语从句的用法。句意:—露西,如果明天不下雨我们去野营吧?—不错呀!if引导的条件状语从句“主将从现”。【典例3】If there ______ no buying and selling of animals, there ______ no killing in nature.
A. is; will be B. will be; will be
C. is; is D. will be; is 考查条件状语从句的用法。句意:如果没有买卖动物的行为,自然界将不会又杀戮。if引导的条件状语从句“主将从现”。