Grammar 条件状语从句和让步状语从句.ppt

条件状语从句常由 if, unless, in case, on condition that, as long as, provided (that) /providing (that), suppose (that)/supposing (that) 等连词引导。 ____you don’t obey the rules, you’ll be punished. He will do the work ____________________ you pay him. ______________ she doesn’t come, what shall we do? I can tell you the truth _________you promise to keep a secret. ________ I forget, please remind me about it. _________we don’t lose heart, we’ll find a way to overcome the difficulty. You will fail to arrive there in time ________ you start earlier. If providing /provided Supposing/suppose Supposing/ suppose In case As/So long as unless unless conj.除非,若不 (= if … not) Don’t come unless I telephone. You will fail unless you work hard. As/So long as we don’t lose heart, we’ll find a way to overcome the difficulty. As long as you’re happy, it doesn’t matter what you do. In case I forget, please remind me about it. as/so long as 只要； in case 万一 on condition (that) ... 在……条件下, 如果 I can tell you the truth on condition that you promise to keep a secret. You can go swimming on condition (that) you dont go too far from the river bank. provided/providing conj.假如, 以…为条件 He won’t be against us in the meeting provided that we ask for his advice in advance. You can borrow the car, providing I can have it back by six oclock. She will go provided her friends can go also. He will do the work providing you pay him. but for/without 要不是，如果没有 But for the rain, we should have a pleasant journey. But for your help, we should not have finished in time. He said he couldnt live without her. Should I be free tomorrow, I would come. Had I been there, I would have filmed the occasion. 其他 有些条件句可省略某些成分或改成短语： If necessary, ring me at home. He will come if asked. In case of fire, ring the bell. He would never do this unless forced. If in doubt, contact our local office. 引导让步状语从句的主要连词有： although, though,even though, even if, while, as, no matter +疑问词，疑问词+ever ______ we don’t agree we con