provided that，providing that有区别吗？可以相互替代吗

　　俩者都可以引导条件状语从句，相当于if。可以互换的。
　　解析：
　　provided that：如果；条件是；倘若； 只要。
　　providing that：假如；以…为条件。
　　It is worth noting, however, that it is often possible to port a virtual appliance to another format, provided that the specification of the new format is open or that you have access to it.
　　但是，有一点值得注意，假如这种新格式的规范是公开的，或者您拥有访问它的权限，那么将一种虚拟设备移植到另一种格式通常是可行的。
　　There’s a possibility of getting a job with a law firm in London, provided that I do well.
　　如果我做得好的话，有可能在伦敦一家法律事务所找到一份工作。
　　Efficiency always wins providing that you're looking at it properly.
　　效率永远是第一位的，前提是你能正确理解它。
　　Providing they communicate the changes to you before making them, and providing that the goalkeeper is clearly identified at all times, then this is allowed in law.
　　假设他们在踢球之前和你交流变动的事情，并假设守门员一直清晰地被辨认，那么这在法律上是允许的。
　　Providing that he can win the support of most of the classmates, he will be elected the monitor.
　　如果他能赢得大多数同学的支持，他就会被选为班长。
　　以上例句可以看出：他们可以互换。

不可以。。