1、条件状语从句由连词if, when(如果），unless, as long as, in case, so far as, provi颊俄岿髭ding that, supposing/supposed that, on condition that等引导
3、方式状语从句由连词as, as if, as though, just as... so ..., the way等来引导， as, just as...so引导的方式状语从句通常位于主句后，当just as ...so结构位于句首时，as从句带有比喻的含义
5、让步状语从句由连词although, though, as, even if, while, when, whether...or not, 疑问词+ever, no matter+疑问词等引导
