特殊词引导的条件状语从句

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 can’t 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，其意为“只要”（=as long as）、“如果”（=if）等。

eg. Providing [Provided] you clear your desk by this evening, you can have tomorrow off. 只要你到今晚把案头上的⼯作做完，你明天就可以休息。

Providing [Providing] you promise not to tell anyone else. I’11 explain the secret. 只要你保证不告诉任何⼈，我就把这个秘密讲给你听。

Provided [Providing] that you keep quiet, you can come to the concert. 只要你保持安静，你就可以去听⾳乐会。Providing there is no opposition, we shall hold the meeting here. 如果没⼈反对我们将在这⾥开会。这类从句通常置于主句之前，但置于主句之后也是可能的。

eg.I will stay here provided [providing] the climate agrees with me. 如果这⾥的⽓候合适的话，我就待下来。You can borrow my bike providing [provided] you bring it back. 你可以借我的⾃⾏车，只要你还给我。