The repletion structures we have discussed this week can be used interchangeably; however, there are a few occasions when one is clearly preferable...

The repletion structures we have discussed this week can be used interchangeably; however, there are a few occasions when one is clearly preferable to another. Discuss, in detail as well as illustrate with an example, how to determine which structure to use when there is no clear indication. Additionally, how much of the choice should be based on personal preference and how much on conventional practices?