语法专项课件(条件状语从句)(共16张)

1、Unit6 Topic3 语法专项课件语法专项课件（条件状语从句）（条件状语从句）初中英语仁爱版八年级下册初中英语仁爱版八年级下册语法透析语法透析考点大观考点大观易错辨析易错辨析通关训练通关训练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, well 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

2、非她生病。We wont 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 wont 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。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。“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 doesnt rain tomorrow, well go t

3、o the park.如果明天不下雨的话，我们就去公园。（从现）（主将）“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）（主情）“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）（主祈）if的用法对比unless与until的用法区别I wont b

4、elieve _ I see it with my own eyes.I dont believe _ I see it with my own eyes.unlessuntil主将从现notuntilunless与until的用法区别解析解析【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”“

5、主情从现”“主祈从现”原则。iswont arguewill comecomeswill give解析解析【典例2】Lucy, what about going camping if it _ tomorrow? Sounds great！ A. didnt rain B. doesnt rain C. rains D. wont 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”。解析解析【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