特殊词引导的条件状语从句 suppose和supposing： suppose和supposing可用作连词，引导条件状语从句，其意为“假若”“如果”等；此时主句通常为疑问句。 eg.Supposing he cant come, who will do the work? 假使他不能来，这工作谁做? Supposing he does not come, shall we go without him? 如果他不来，是不是不带他去? Suppose you were given a chance to study in America, would you accept? 假如给你一个到美国学习的机会，你会接受吗? Suppose Supposing (that) we miss the train, what shall we do? 假如我们误了火车，我们将怎么办? provided和providing： 虽然 providing 和 provided 形式上为动词provide的现在分词和过去分词，但它们均可用作连词，引导条件状语从句，其
